From 2236247b9692e717204c67e076b5a46dc4469ccd Mon Sep 17 00:00:00 2001
From: alex <alex@infiniteadaptability.org>
Date: Mon, 20 Sep 2021 23:04:17 -0700
Subject: [PATCH] major refactor

refactored into shell script
added scripts as tests
removed old project in C
removed autotools dependency
added Makefile
---
 .gitignore                                    |   26 +-
 Dockerfile                                    |   77 --
 Makefile                                      |   21 +
 Makefile.am                                   |   76 --
 configure.ac                                  |   72 -
 git-extra                                     |  310 +++++
 include/add.h                                 |   22 -
 include/branch.h                              |   23 -
 include/cat.h                                 |   12 -
 include/commit.h                              |   12 -
 include/default.h                             |   16 -
 include/edit.h                                |   17 -
 include/editor.h                              |   21 -
 include/exec.h                                |   17 -
 include/git.h                                 |   68 -
 include/hash.h                                |   11 -
 include/log.h                                 |   18 -
 include/ls.h                                  |   13 -
 include/main.h                                |   27 -
 include/opt.h                                 |   25 -
 include/prepend.h                             |   10 -
 include/templ.h                               |   19 -
 src/add.c                                     |   70 -
 src/branch.c                                  |  115 --
 src/cat.c                                     |   14 -
 src/commit.c                                  |   44 -
 src/default.c                                 |   78 --
 src/edit.c                                    |   38 -
 src/editor.c                                  |   35 -
 src/exec.c                                    |  121 --
 src/git.c                                     |   24 -
 src/hash.c                                    |    9 -
 src/log.c                                     |   14 -
 src/ls.c                                      |   13 -
 src/main.c                                    |  104 --
 src/prepend.c                                 |   23 -
 src/templ.c                                   |   73 --
 test/add.tests.sh                             |   74 ++
 test/add_to_index.tests.sh                    |   31 +
 test/branch_create.tests.sh                   |   23 +
 test/branch_exists.tests.sh                   |   35 +
 test/branch_hash.tests.sh                     |   27 +
 test/branch_reset.tests.sh                    |   34 +
 test/cat_file.tests.sh                        |   28 +
 test/edit.tests.sh                            |   41 +
 test/editor.tests.sh                          |   47 +
 test/integration/Makefile.am                  |   67 -
 test/integration/index.js                     |    1 -
 test/integration/package-lock.json            | 1166 -----------------
 test/integration/package.json                 |   14 -
 .../integration/test/add.integration.tests.js |   79 --
 .../test/branch.pattern.integration.test.js   |   19 -
 .../integration/test/cat.integration.tests.js |   46 -
 .../test/edit.integration.tests.js            |   43 -
 test/integration/test/ls.integration.tests.js |   75 --
 test/integration/test/utils.js                |   25 -
 test/ls.tests.sh                              |   29 +
 test/parse_arguments.tests.sh                 |   46 +
 test/setup.sh                                 |   55 +
 test/unit/Makefile.am                         |  100 --
 test/unit/add.tests.c                         |   18 -
 test/unit/add.tests.h                         |   12 -
 test/unit/branch.tests.c                      |   44 -
 test/unit/branch.tests.h                      |   14 -
 test/unit/cat.tests.c                         |   19 -
 test/unit/cat.tests.h                         |   11 -
 test/unit/commit.tests.c                      |   30 -
 test/unit/commit.tests.h                      |   11 -
 test/unit/default.tests.c                     |   26 -
 test/unit/default.tests.h                     |   14 -
 test/unit/edit.tests.c                        |   21 -
 test/unit/edit.tests.h                        |   12 -
 test/unit/editor.tests.c                      |   21 -
 test/unit/editor.tests.h                      |   12 -
 test/unit/hash.tests.c                        |   20 -
 test/unit/hash.tests.h                        |   11 -
 test/unit/templ.tests.c                       |   25 -
 test/unit/templ.tests.h                       |   11 -
 test/unit/test_utils.c                        |   29 -
 test/unit/test_utils.h                        |   12 -
 test/usage.tests.sh                           |   24 +
 81 files changed, 827 insertions(+), 3363 deletions(-)
 delete mode 100644 Dockerfile
 create mode 100644 Makefile
 delete mode 100644 Makefile.am
 delete mode 100644 configure.ac
 create mode 100644 git-extra
 delete mode 100644 include/add.h
 delete mode 100644 include/branch.h
 delete mode 100644 include/cat.h
 delete mode 100644 include/commit.h
 delete mode 100644 include/default.h
 delete mode 100644 include/edit.h
 delete mode 100644 include/editor.h
 delete mode 100644 include/exec.h
 delete mode 100644 include/git.h
 delete mode 100644 include/hash.h
 delete mode 100644 include/log.h
 delete mode 100644 include/ls.h
 delete mode 100644 include/main.h
 delete mode 100644 include/opt.h
 delete mode 100644 include/prepend.h
 delete mode 100644 include/templ.h
 delete mode 100644 src/add.c
 delete mode 100644 src/branch.c
 delete mode 100644 src/cat.c
 delete mode 100644 src/commit.c
 delete mode 100644 src/default.c
 delete mode 100644 src/edit.c
 delete mode 100644 src/editor.c
 delete mode 100644 src/exec.c
 delete mode 100644 src/git.c
 delete mode 100644 src/hash.c
 delete mode 100644 src/log.c
 delete mode 100644 src/ls.c
 delete mode 100644 src/main.c
 delete mode 100644 src/prepend.c
 delete mode 100644 src/templ.c
 create mode 100755 test/add.tests.sh
 create mode 100755 test/add_to_index.tests.sh
 create mode 100755 test/branch_create.tests.sh
 create mode 100755 test/branch_exists.tests.sh
 create mode 100755 test/branch_hash.tests.sh
 create mode 100755 test/branch_reset.tests.sh
 create mode 100755 test/cat_file.tests.sh
 create mode 100755 test/edit.tests.sh
 create mode 100755 test/editor.tests.sh
 delete mode 100644 test/integration/Makefile.am
 delete mode 100644 test/integration/index.js
 delete mode 100644 test/integration/package-lock.json
 delete mode 100644 test/integration/package.json
 delete mode 100644 test/integration/test/add.integration.tests.js
 delete mode 100644 test/integration/test/branch.pattern.integration.test.js
 delete mode 100644 test/integration/test/cat.integration.tests.js
 delete mode 100644 test/integration/test/edit.integration.tests.js
 delete mode 100644 test/integration/test/ls.integration.tests.js
 delete mode 100644 test/integration/test/utils.js
 create mode 100755 test/ls.tests.sh
 create mode 100755 test/parse_arguments.tests.sh
 create mode 100755 test/setup.sh
 delete mode 100644 test/unit/Makefile.am
 delete mode 100644 test/unit/add.tests.c
 delete mode 100644 test/unit/add.tests.h
 delete mode 100644 test/unit/branch.tests.c
 delete mode 100644 test/unit/branch.tests.h
 delete mode 100644 test/unit/cat.tests.c
 delete mode 100644 test/unit/cat.tests.h
 delete mode 100644 test/unit/commit.tests.c
 delete mode 100644 test/unit/commit.tests.h
 delete mode 100644 test/unit/default.tests.c
 delete mode 100644 test/unit/default.tests.h
 delete mode 100644 test/unit/edit.tests.c
 delete mode 100644 test/unit/edit.tests.h
 delete mode 100644 test/unit/editor.tests.c
 delete mode 100644 test/unit/editor.tests.h
 delete mode 100644 test/unit/hash.tests.c
 delete mode 100644 test/unit/hash.tests.h
 delete mode 100644 test/unit/templ.tests.c
 delete mode 100644 test/unit/templ.tests.h
 delete mode 100644 test/unit/test_utils.c
 delete mode 100644 test/unit/test_utils.h
 create mode 100755 test/usage.tests.sh

diff --git a/.gitignore b/.gitignore
index b1eaae0..07d19e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,24 +1,2 @@
-# autoconf/automake
-Makefile
-*.in
-*.in~
-aclocal.m4
-autom4te.cache
-autoscan.log
-build-aux
-config.log
-config.status
-configure
-configure.scan
-include/config.h
-include/stamp-h1
-src/.deps
-src/.dirstamp
-test/unit/.deps
-
-# build objects
-*.o
-*.log
-*.trs
-*.tests
-git-ex
\ No newline at end of file
+test/source.sh
+test/.testdir
diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index 559c4cd..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,77 +0,0 @@
-FROM debian:latest as base
-
-RUN apt-get update
-RUN apt-get install -y git autoconf automake gcc make vim
-
-FROM base as unit-tester
-
-RUN apt-get install -y gdb vim valgrind
-
-FROM base as core
-
-WORKDIR /build
-
-COPY Makefile.am .
-COPY configure.ac .
-
-COPY README.md .
-COPY templates templates/
-
-COPY test test/
-
-COPY include include/
-RUN autoreconf -vif
-
-COPY src src/
-RUN ./configure
-
-RUN make
-RUN make distcheck
-RUN make install
-
-FROM unit-tester
-
-WORKDIR /build
-COPY --from=core /build /build
-
-COPY --from=core /usr/local/share/git-extra/templates/ /usr/local/share/git-extra/templates/
-
-RUN ./configure
-RUN make check || cat test/unit/test-suite.log
-
-FROM node:latest as integration-tester
-
-COPY --from=core /usr/local/bin/git-ex /usr/local/bin/git-ex
-COPY --from=core /usr/local/share/git-extra/templates/ /usr/local/share/git-extra/templates/
-
-USER node
-WORKDIR /home/node
-
-COPY --from=core --chown=node:node /build/test/integration/index.js .
-COPY --from=core --chown=node:node /build/test/integration/package.json .
-COPY --from=core --chown=node:node /build/test/integration/package-lock.json .
-
-RUN npm install
-
-COPY --from=core --chown=node:node /build/test/integration/test/ test/
-
-RUN npm test
-
-FROM core as final
-
-WORKDIR /root
-RUN git init working
-
-# setup test repository; Docker image meant to be a sandbox
-WORKDIR /root/working
-
-RUN echo "test" > test.txt
-RUN git config --global core.editor vim
-
-RUN git config --local user.name "test"
-RUN git config --local user.email "test@email"
-
-RUN git add -A
-RUN git commit -a -m "..."
-
-ENTRYPOINT bash
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..c36ab6c
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,21 @@
+PREFIX ?= /usr/local
+BINDIR ?= $(PREFIX)/bin
+
+all:
+	@echo "git-extra is a shell script; nothing to make. Try 'make install' instead."
+
+check:
+	@head -n `grep -n "main()" git-extra | cut -f1 -d:` git-extra | head -n -1 > test/source.sh
+	@cd test && run-parts --exit-on-error --regex '.*\.tests\.sh' .
+
+clean:
+	@rm -vrf test/.testdir
+
+install:
+	@install -v -d "$(BINDIR)/" && install -m 0755 -v git-extra "$(BINDIR)/git-ex"
+
+uninstall:
+	@rm -vrf \
+		$(BINDIR)/git-ex
+
+.PHONY: install uninstall check clean
diff --git a/Makefile.am b/Makefile.am
deleted file mode 100644
index 6334348..0000000
--- a/Makefile.am
+++ /dev/null
@@ -1,76 +0,0 @@
-templatesdir=$(datadir)/git-extra/templates
-
-AM_CPPFLAGS = \
-	-I$(top_builddir)/include/ \
-	-I$(top_srcdir)/include/ \
-	-DTEMPLATE_DIR='"$(templatesdir)"'
-
-bin_PROGRAMS = git-ex
-git_ex_SOURCES = \
-	src/add.c \
-	src/branch.c \
-	src/cat.c \
-	src/commit.c \
-	src/default.c \
-	src/edit.c \
-	src/editor.c \
-	src/exec.c \
-	src/git.c \
-	src/hash.c \
-	src/log.c \
-	src/ls.c \
-	src/main.c \
-	src/prepend.c \
-	src/templ.c
-git_ex_SOURCES += \
-	include/add.h \
-	include/branch.h \
-	include/cat.h \
-	include/commit.h \
-	include/default.h \
-	include/edit.h \
-	include/editor.h \
-	include/exec.h \
-	include/git.h \
-	include/hash.h \
-	include/log.h \
-	include/ls.h \
-	include/main.h \
-	include/opt.h \
-	include/prepend.h \
-	include/templ.h
-
-dist_doc_DATA = $(top_srcdir)/README.md
-dist_templates_DATA = \
-	$(top_srcdir)/templates/bug.template
-
-SUBDIRS = test/integration test/unit
-
-if HAVE_DOCKER
-IMAGE_NAME=git-extra
-CONTAINER_NAME=git-extra-test
-build:
-	docker build -t $(IMAGE_NAME) .
-
-run: build
-	docker run -d \
-		--name $(CONTAINER_NAME) \
-		--cap-add=SYS_PTRACE --security-opt seccomp=unconfined \
-	 	$(IMAGE_NAME)
-
-start: build
-	-docker run -it --rm \
-		--cap-add=SYS_PTRACE --security-opt seccomp=unconfined \
-		$(IMAGE_NAME)
-
-stop:
-	docker stop $(CONTAINER_NAME)
-	docker rm $(CONTAINER_NAME);
-else
-build: missing-local
-run: missing-local
-start: missing-local
-stop: missing-local
-missing-local:
-	@echo "docker not found"
-endif
\ No newline at end of file
diff --git a/configure.ac b/configure.ac
deleted file mode 100644
index bc6f3f6..0000000
--- a/configure.ac
+++ /dev/null
@@ -1,72 +0,0 @@
-AC_PREREQ([2.69])
-AC_INIT([git-extra], [0.0.0])
-
-# Store build files not in main directory
-AC_CONFIG_AUX_DIR([build-aux])
-
-AM_INIT_AUTOMAKE([foreign subdir-objects nostdinc -Wall -Werror])
-
-AC_CONFIG_SRCDIR([src/main.c])
-AC_CONFIG_HEADERS([include/config.h])
-
-AC_ARG_ENABLE([memcheck],
-  [AS_HELP_STRING([--disable-memcheck],
-  [disable valgrind (enabled by default)])],
-  [enable_memcheck=$enableval],
-  [enable_memcheck=yes])
-
-AC_PATH_PROG([GIT], [git])
-AM_CONDITIONAL([HAVE_GIT], [test -n "$GIT"])
-AM_COND_IF([HAVE_GIT],,[AC_MSG_ERROR([Please install git before trying to build git-extra])])
-
-AC_PATH_PROG([DOCKER], [docker])
-AM_CONDITIONAL([HAVE_DOCKER], [test -n "$DOCKER"])
-
-AC_PATH_PROG([NODE], [node])
-AM_CONDITIONAL([HAVE_NODE], [test -n "$NODE"])
-
-AC_PATH_PROG([VALGRIND], [valgrind])
-AM_CONDITIONAL([HAVE_VALGRIND], [test -n "$VALGRIND"])
-
-dnl disable memcheck if valgrind not found
-if test "x$enable_memcheck" = "xyes"; then
-  if test -z "$VALGRIND"; then
-    enable_memcheck=no
-  fi
-fi
-
-AC_MSG_CHECKING([if memcheck should be enabled])
-if test x$enable_memcheck != xno; then
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-
-AM_CONDITIONAL([ENABLE_MEMCHECK],[test x$enable_memcheck = xyes])
-
-# Checks for programs.
-AC_PROG_CC
-AC_PROG_INSTALL
-
-# Checks for libraries.
-
-# Checks for header files.
-AC_CHECK_HEADERS([stddef.h stdlib.h string.h unistd.h])
-
-# Checks for typedefs, structures, and compiler characteristics.
-AC_TYPE_OFF_T
-AC_TYPE_PID_T
-AC_TYPE_SIZE_T
-AC_TYPE_SSIZE_T
-
-# Checks for library functions.
-AC_FUNC_FORK
-AC_FUNC_MALLOC
-AC_CHECK_FUNCS([dup2 getcwd memset setenv])
-
-AC_CONFIG_FILES([
-	Makefile
-  test/integration/Makefile
-	test/unit/Makefile
-])
-AC_OUTPUT
diff --git a/git-extra b/git-extra
new file mode 100644
index 0000000..f566e17
--- /dev/null
+++ b/git-extra
@@ -0,0 +1,310 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# Option variables
+LOG_LEVEL=default
+BRANCH=extra
+EDITOR=
+MESSAGE=
+TEMPLATE=
+
+# helper variables
+LONG_OUTPUT=false
+POSITIONAL_ARGUMENTS=
+PREFIX=
+PREV_COMMIT=
+UTILITY=ls
+WORKING_BRANCH=
+
+detect_git() {
+	if [[ -z "`git --version`" ]]; then
+		log_err "git not found in path"
+		exit 1
+	fi
+}
+
+detect_commits() {
+	set +e
+	git rev-list --count HEAD > /dev/null 2>&1
+	if [[ $? -ne 0 ]]; then
+		log_err "no commits found, create initial commit first"
+		exit 1
+	fi
+	set -e
+}
+
+log_info() {
+	if [[ "$LOG_LEVEL" == "info" ]]; then
+		log "$@"
+	fi
+}
+
+log_err() {
+	echo -e "$@"
+}
+
+log() {
+	if [[ "$LOG_LEVEL" != "error" ]]; then
+		echo -e "$@"
+	fi
+}
+
+usage() {
+	log_err "Usage:"
+	log_err ""
+	log_err "\tgit extra [options] [add|cat|edit|ls] [path]"
+	log_err ""
+	log_err "Options:"
+	log_err "\t--branch, -b <branch>"
+	log_err "\t--editor, -e <editor>"
+	log_err "\t--long, -l"
+	log_err "\t--message, -m <message>"
+	log_err "\t--quiet, -q"
+	log_err "\t--template, -t <template>"
+	log_err "\t--verbose, -v"
+	exit 1
+}
+
+set_branch() {
+	log_info "setting branch to $1"
+	BRANCH="$1"
+}
+
+set_editor() {
+	log_info "setting editor to $1"
+	EDITOR="$1"
+}
+
+set_loglevel() {
+	log_info "setting loglevel to '$1'"
+	case "$1" in
+		"default") LOG_LEVEL="default" ;;
+		"info") LOG_LEVEL="info" ;;
+		"error") LOG_LEVEL="error" ;;
+		*) log_err "unknown log level '$1'" ;;
+	esac
+}
+
+set_long() {
+	log_info "setting long output option to true"
+	LONG_OUTPUT=true
+}
+
+set_message() {
+	log_info "setting message to '$1'"
+	MESSAGE="$1"
+}
+
+set_template() {
+	log_info "setting template to '$1'"
+	TEMPLATE="$1"
+}
+
+parse_arguments() {
+	# transform long options into short opts
+	for arg in "$@"; do
+		shift
+		case "$arg" in
+			"--branch") set -- "$@" "-b" ;;
+			"--editor") set -- "$@" "-e" ;;
+			"--long") set -- "$@" "-l" ;;
+			"--message") set -- "$@" "-m" ;;
+			"--quiet") set -- "$@" "-q" ;;
+			"--template") set -- "$@" "-t" ;;
+			"--verbose") set -- "$@" "-v" ;;
+			*) set -- "$@" "$arg" ;;
+		esac
+	done
+
+	# parse short options
+	OPTIND=1
+	while getopts "b:e:lm:qt:v" opt
+	do
+		case "$opt" in
+			"b") set_branch "$OPTARG" ;;
+			"e") set_editor "$OPTARG" ;;
+			"l") set_long ;;
+			"m") set_message "$OPTARG" ;;
+			"q") set_loglevel "error" ;;
+			"t") set_template "$OPTARG" ;;
+			"v") set_loglevel "info" ;;
+			"?") usage ;;
+		esac
+	done
+
+	shift $(expr $OPTIND - 1) # remove options
+	if [[ "$#" -gt 0 ]]; then
+		UTILITY="$1"
+		shift
+		POSITIONAL_ARGUMENTS="$@"
+	fi
+}
+
+branch_create() {
+	log_info "creating branch $BRANCH"
+	git check-ref-format --branch "$BRANCH" > /dev/null
+	HASH=`echo "" | git mktree --batch`
+	TREE_HASH=`git commit-tree -m "init" "$HASH"`
+	git update-ref "refs/heads/$BRANCH" "$TREE_HASH"
+}
+
+branch_exists() {
+	if test $(git branch --list "$BRANCH" | wc -c) == 0; then
+		branch_create
+	fi
+}
+
+branch_hash() {
+	# changes to extra branch and stores prevous commit hash in PREV_COMMIT
+	branch_exists
+
+	WORKING_BRANCH=`git rev-parse --verify HEAD --abbrev-ref`
+
+	git symbolic-ref HEAD "refs/heads/$BRANCH"
+	git reset > /dev/null
+
+	PREV_COMMIT=`git rev-parse --verify HEAD`
+}
+
+branch_reset() {
+	log_info "reseting branch back to $WORKING_BRANCH"
+
+	git symbolic-ref HEAD "refs/heads/$WORKING_BRANCH"
+	git reset
+}
+
+add_to_index() {
+	log_info "adding $2 to index"
+
+	# fills PREV_COMMIT with $BRANCH's previous commit hash
+	branch_hash
+
+	hash=`git hash-object "$1" -w`
+	rm "$1"
+
+	git update-index --add --cacheinfo 100644 "$hash" "$2"
+	tree_hash=`git write-tree`
+	commit_hash=`git commit-tree -m "${MESSAGE:-updated using git-extra}" -p "$PREV_COMMIT" "$tree_hash"`
+
+	git update-ref "refs/heads/$BRANCH" "$commit_hash"
+	
+	branch_reset
+}
+
+add() {
+	branch_exists
+
+	if [[ "$#" -ne 1 ]]; then
+		log_err "no path given to add"
+		usage
+	fi
+	
+	if test $(git ls-tree "$BRANCH" "$1" | wc -c) != 0; then
+		log_err "file '$1' already exists; did you mean to edit '$1' instead?"
+		usage
+	fi
+
+	tmpfile=`mktemp`
+
+	if [[ -n "$TEMPLATE" ]]; then
+		if [[ -r "$TEMPLATE" ]]; then
+			log_info "using template '$TEMPLATE'"
+			cat "$TEMPLATE" > "$tmpfile"
+		else
+			log_err "template '$TEMPLATE' doesn't exist"
+			exit 1
+		fi
+	fi
+
+	editor "$tmpfile"
+
+	add_to_index "$tmpfile" "$1"
+
+	log "added $1"
+}
+
+cat_file() {
+	branch_exists
+	HASH=`git ls-tree "$BRANCH" "$1" | awk -F ' ' '{print $3}'`
+	if [[ -z "$HASH" ]]; then
+		log_err "$1 doesn't exist"
+		exit 1
+	fi
+
+	if [[ $# -eq 2 ]]; then
+		git cat-file -p "$HASH" > "$2"
+	else
+		git cat-file -p "$HASH"
+	fi
+}
+
+edit() {
+	tmpfile=`mktemp`
+
+	log_info "editing $1 using $tmpfile"
+
+	cat_file "$1" "$tmpfile"
+
+	editor $tmpfile
+
+	add_to_index "$tmpfile" "$1"
+
+	log "saved $1"
+}
+
+editor() {
+	log_info "opening temporary file '$1'"
+
+	pre_edit_hash=`b2sum $1`
+
+	if [[ -z "$EDITOR" ]]; then
+		log_info "no editor found, checking git config"
+		set +e
+		EDITOR="`git config core.editor`"
+		set -e
+		if [[ -z "$EDITOR" ]]; then
+			log_err "no editor defined; use --editor option, set EDITOR environmental variable, or set git config core.editor."
+			exit 1
+		fi
+	fi
+
+	CMD=`printf "$EDITOR %s\n" "$1"`
+	eval "$CMD"
+
+	post_edit_hash=`b2sum $1`
+
+	if [[ "$pre_edit_hash" == "$post_edit_hash" ]]; then
+		log_err "no changes detected"
+		exit 1
+	fi
+}
+
+ls() {
+	branch_exists
+
+	if [[ "$LONG_OUTPUT" == "true" ]]; then
+		git ls-tree "$BRANCH" -r $@
+	else
+		git ls-tree "$BRANCH" -r --name-only $@
+	fi
+}
+
+main() {
+	detect_git
+	detect_commits
+
+	parse_arguments "$@"
+
+	case "$UTILITY" in
+		"add") add "$POSITIONAL_ARGUMENTS" ;;
+		"cat") cat_file "$POSITIONAL_ARGUMENTS" ;;
+		"edit") edit "$POSITIONAL_ARGUMENTS" ;;
+		"ls") ls "$POSITIONAL_ARGUMENTS" ;;
+		*) log_err "unknown utility: $UTILITY"; usage ;;
+	esac
+
+	exit
+}
+
+main "$@"
diff --git a/include/add.h b/include/add.h
deleted file mode 100644
index b90df92..0000000
--- a/include/add.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef __ADD_H_
-#define __ADD_H_
-
-#include<stdio.h>
-#include<stdlib.h>
-
-#include<commit.h>
-#include<editor.h>
-#include<git.h>
-#include<log.h>
-#include<opt.h>
-#include<templ.h>
-
-#define ADD_MESSAGE_ADDED_FILE_INDEX_HASH "added %s to index with hash: %s\n"
-#define ADD_MESSAGE_ALREADY_ADDED "%s already exists\n"
-#define ADD_MESSAGE_ADDED_FILE "added %s\n"
-#define ADD_MESSAGE_TEMP_FILENAME "temporary file %s created\n"
-
-int add(char*);
-int add_to_index(char*,char*);
-
-#endif
\ No newline at end of file
diff --git a/include/branch.h b/include/branch.h
deleted file mode 100644
index a860dbf..0000000
--- a/include/branch.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef __BRANCH_H_
-#define __BRANCH_H_
-
-#include<assert.h>
-#include<stddef.h>
-
-#include<exec.h>
-#include<git.h>
-#include<log.h>
-#include<opt.h>
-#include<prepend.h>
-
-#define BRANCH_MISSING_MESSAGE "branch `%s` missing\n"
-#define BRANCH_CREATED_MESSAGE "branch `%s` created\n"
-#define BRANCH_RESET_MESSAGE "switch back to branch `%s` \n"
-#define BRANCH_WORKING_BRANCH_ERROR_MESSAGE "failed to get current working branch; additional output might be printed above\n"
-
-int branch(char*,size_t);
-int branch_create();
-int branch_exists();
-int branch_reset();
-
-#endif
\ No newline at end of file
diff --git a/include/cat.h b/include/cat.h
deleted file mode 100644
index ef6e682..0000000
--- a/include/cat.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __CAT_H_
-#define __CAT_H_
-
-#include<stdlib.h>
-
-#include<exec.h>
-#include<git.h>
-#include<log.h>
-
-int cat(char*);
-
-#endif
\ No newline at end of file
diff --git a/include/commit.h b/include/commit.h
deleted file mode 100644
index f78b643..0000000
--- a/include/commit.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __COMMIT_H_
-#define __COMMIT_H_
-
-#include<assert.h>
-
-#include<branch.h>
-#include<git.h>
-#include<prepend.h>
-
-int commit(char*,size_t,char*);
-
-#endif
\ No newline at end of file
diff --git a/include/default.h b/include/default.h
deleted file mode 100644
index 485853f..0000000
--- a/include/default.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef __DEFAULT_H_
-#define __DEFAULT_H_
-
-#include<stdlib.h>
-#include<unistd.h>
-
-#include<exec.h>
-#include<git.h>
-#include<opt.h>
-
-int defaults();
-void default_branch();
-int default_editor();
-int default_path_prefix();
-
-#endif
\ No newline at end of file
diff --git a/include/edit.h b/include/edit.h
deleted file mode 100644
index ee1dff2..0000000
--- a/include/edit.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef __EDIT_H_
-#define __EDIT_H_
-
-#include<stdio.h>
-#include<stdlib.h>
-
-#include<add.h>
-#include<cat.h>
-#include<commit.h>
-#include<log.h>
-
-#define EDIT_MESSAGE_EDITTED_FILE "%s saved\n"
-#define EDIT_MESSAGE_TEMP_FILENAME "temporary file %s created\n"
-
-int edit(char*);
-
-#endif
\ No newline at end of file
diff --git a/include/editor.h b/include/editor.h
deleted file mode 100644
index 5c3fa83..0000000
--- a/include/editor.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef __EDITOR_H_
-#define __EDITOR_H_
-
-#include<errno.h>
-#include<stdlib.h>
-#include<string.h>
-#include<sys/wait.h>
-#include<unistd.h>
-#include<wordexp.h>
-
-#include<exec.h>
-#include<hash.h>
-#include<log.h>
-#include<opt.h>
-
-#define EDITOR_MESSAGE_MISSING_EDITOR "no editor or core.editor config option set; set EDITOR env variable or pass --editor option\n"
-#define EDITOR_MESSAGE_NO_CHANGE "no change detected; aborting...\n"
-
-int editor(char*);
-
-#endif
\ No newline at end of file
diff --git a/include/exec.h b/include/exec.h
deleted file mode 100644
index 6cc4eeb..0000000
--- a/include/exec.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef __EXEC_H_
-#define __EXEC_H_
-
-#include<errno.h>
-#include<stdlib.h>
-#include<string.h>
-#include<sys/wait.h>
-#include<unistd.h>
-
-#include<log.h>
-
-#define EXEC_INVALID_RETURN_STATUS "%s invalid return status [%d]\n"
-
-int exec_cmd(char**,char*,char*,size_t);
-int exec_cmd_with_stds(char**);
-
-#endif
\ No newline at end of file
diff --git a/include/git.h b/include/git.h
deleted file mode 100644
index 7b14ff3..0000000
--- a/include/git.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#ifndef __GIT_H_
-#define __GIT_H_
-
-#include<stdlib.h>
-#include<string.h>
-
-#include<exec.h>
-#include<log.h>
-#include<opt.h>
-
-#define HASH_BUF_LENGTH 41
-
-#define LS_TREE_MODE_LENGTH 7
-#define LS_TREE_TYPE_LENGTH 5
-#define LS_TREE_PREFIX_LENGTH LS_TREE_MODE_LENGTH+LS_TREE_TYPE_LENGTH
-#define LS_TREE_ENTRY_LENGTH HASH_BUF_LENGTH+LS_TREE_PREFIX_LENGTH
-
-#define GIT_COMMIT_DEFAULT_MESSAGE "updated using git-ex"
-#define GIT_COMMIT_DEFAULT_MESSAGE_LENGTH 21
-
-#define GIT_SYMBOLIC_REF_BRANCH_NAME_TOO_LARGE "consider making branch name shorter...\n"
-#define GIT_UPDATE_REF_BRANCH_NAME_TOO_LARGE "consider making branch name shorter...\n"
-
-enum git_exec_flags {
-	GIT_EXEC_FLAG_DEFAULT = 0,
-	GIT_EXEC_FLAG_WITH_STDS = 1
-};
-
-enum rev_parse_type {
-	REV_PARSE_BRANCH_NAME,
-	REV_PARSE_HASH,
-	REV_PARSE_TOP_LEVEL
-};
-
-enum hash_object_type {
-	HASH_OBJECT_DEFAULT,
-	HASH_OBJECT_ADD_TO_INDEX
-};
-
-#define git_branch(output,len) git(GIT_EXEC_FLAG_DEFAULT,NULL,output,len,"git","branch","--list",global_opts.branch,NULL)
-#define git_cat_file(hash) git(GIT_EXEC_FLAG_WITH_STDS,NULL,NULL,0,"git","cat-file","-p",hash,NULL)
-#define git_commit_tree(tree_hash,parent_hash,output,len) git(GIT_EXEC_FLAG_DEFAULT,NULL,output,len,"git","commit-tree","-m",(NULL!=global_opts.message)?global_opts.message:GIT_COMMIT_DEFAULT_MESSAGE,tree_hash,(NULL!=parent_hash)?"-p":NULL,parent_hash,NULL)
-#define git_config(option,output,len) git(GIT_EXEC_FLAG_DEFAULT,NULL,output,len,"git","config","--get",option,NULL)
-#define git_hash_object(filename,type,output,len) git(GIT_EXEC_FLAG_DEFAULT,NULL,output,len,"git","hash-object",filename,(HASH_OBJECT_ADD_TO_INDEX==type)?"-w":NULL,NULL)
-#define git_ls_tree(path,output,len) \
-	git( \
-		(NULL==path)?GIT_EXEC_FLAG_WITH_STDS:GIT_EXEC_FLAG_DEFAULT, \
-		NULL, \
-		output, \
-		len, \
-		"git", \
-		"ls-tree", \
-		global_opts.branch, \
-		(NULL==path)?"-r":path, \
-		(NULL!=path)?NULL:(GIT_LS_TREE_OPTION_NAME_ONLY==global_opts.ls_options)?"--name-only":NULL, \
-		NULL \
-	)
-#define git_mktree(output,len) git(GIT_EXEC_FLAG_DEFAULT,"\n",output,len,"git","mktree","--batch",NULL)
-#define git_reset() git(GIT_EXEC_FLAG_DEFAULT,NULL,NULL,0,"git","reset",NULL)
-#define git_rev_parse(type,output,len) git(GIT_EXEC_FLAG_DEFAULT,NULL,output,len,"git","rev-parse",(REV_PARSE_TOP_LEVEL==type)?"--show-toplevel":"--verify",(REV_PARSE_TOP_LEVEL==type)?NULL:"HEAD",(REV_PARSE_BRANCH_NAME==type)?"--abbrev-ref":NULL,NULL)
-#define git_symbolic_ref(branch) git(GIT_EXEC_FLAG_DEFAULT,NULL,NULL,0,"git","symbolic-ref","HEAD",branch,NULL)
-#define git_update_index(file_hash,path) git(GIT_EXEC_FLAG_DEFAULT,NULL,NULL,0,"git","update-index","--add","--cacheinfo","100644",file_hash,path,NULL)
-#define git_update_ref(commit_hash,branch) git(GIT_EXEC_FLAG_DEFAULT,NULL,NULL,0,"git","update-ref",branch,commit_hash,NULL)
-#define git_write_tree(output,len) git(GIT_EXEC_FLAG_DEFAULT,NULL,output,len,"git","write-tree",NULL)
-
-int git(enum git_exec_flags,char*,char*,size_t,...);
-
-#endif
\ No newline at end of file
diff --git a/include/hash.h b/include/hash.h
deleted file mode 100644
index af13a15..0000000
--- a/include/hash.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __HASH_H_
-#define __HASH_H_
-
-#include<assert.h>
-
-#include<exec.h>
-#include<git.h>
-
-int hash(char*,char*,int);
-
-#endif
\ No newline at end of file
diff --git a/include/log.h b/include/log.h
deleted file mode 100644
index 544ab75..0000000
--- a/include/log.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#ifndef __LOG_H_
-#define __LOG_H_
-
-#include<stdarg.h>
-#include<stdio.h>
-
-extern int verbose_flag;
-
-enum log_level {
-	LOG_LEVEL_SILENT = -1, /* suppresses all output */
-	LOG_LEVEL_ERRORS = 0,  /* only prints errors */
-	LOG_LEVEL_DEFAULT = 1, /* normal output */
-	LOG_LEVEL_VERBOSE = 2  /* logging and debugging info */
-};
-
-void log_message(enum log_level,const char*,...);
-
-#endif
\ No newline at end of file
diff --git a/include/ls.h b/include/ls.h
deleted file mode 100644
index 9b3fac1..0000000
--- a/include/ls.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef __LS_H_
-#define __LS_H_
-
-#include<stdlib.h>
-
-#include<exec.h>
-#include<git.h>
-
-#define LS_MESSAGE_TREE_LEVEL "using ls_tree option: %d\n"
-
-int ls(int);
-
-#endif
\ No newline at end of file
diff --git a/include/main.h b/include/main.h
deleted file mode 100644
index 163cf88..0000000
--- a/include/main.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __MAIN_H_
-
-#include<getopt.h>
-#include<stdlib.h>
-#include<string.h>
-
-#include<add.h>
-#include<cat.h>
-#include<default.h>
-#include<edit.h>
-#include<log.h>
-#include<ls.h>
-#include<opt.h>
-
-#define MAIN_BRANCH_SET_MESSAGE "using branch `%s`\n"
-#define MAIN_EDITOR_SET_MESSAGE "using %s as editor\n"
-#define MAIN_UNKNOWN_SUBCOMMAND_MESSAGE "unknown command `git ex %s`\n"
-#define MAIN_WRONG_NUMBER_ARGS "wrong number of arguments\n"
-
-#define MAIN_SUBCOMMAND_ADD "add"
-#define MAIN_SUBCOMMAND_CAT "cat"
-#define MAIN_SUBCOMMAND_EDIT "edit"
-#define MAIN_SUBCOMMAND_LS "ls"
-
-int main(int,char**);
-
-#endif
\ No newline at end of file
diff --git a/include/opt.h b/include/opt.h
deleted file mode 100644
index 8df5028..0000000
--- a/include/opt.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef __OPT_H_
-#define __OPT_H_
-
-// global options
-#define WORKING_BRANCH_BUF_SIZE 30
-
-enum ls_tree_options {
-	GIT_LS_TREE_OPTION_DEFAULT = 0,
-	GIT_LS_TREE_OPTION_FULL = 1,
-	GIT_LS_TREE_OPTION_NAME_ONLY = 2
-};
-
-struct options {
-	char *branch;
-	char *editor;
-	char *message;
-	char *path_prefix;
-	char *template;
-	enum ls_tree_options ls_options;
-	char working_branch[WORKING_BRANCH_BUF_SIZE];
-};
-
-extern struct options global_opts;
-
-#endif
\ No newline at end of file
diff --git a/include/prepend.h b/include/prepend.h
deleted file mode 100644
index 65f4a27..0000000
--- a/include/prepend.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef __PREPEND_H_
-#define __PREPEND_H_
-
-#include<assert.h>
-#include<stdlib.h>
-#include<string.h>
-
-char *prepend(char*,char*);
-
-#endif
\ No newline at end of file
diff --git a/include/templ.h b/include/templ.h
deleted file mode 100644
index 75fd2c9..0000000
--- a/include/templ.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#ifndef __TEMPL_H_
-#define __TEMPL_H_
-
-#include<stdio.h>
-#include<stdlib.h>
-#include<string.h>
-#include<sys/sendfile.h>
-
-#include<opt.h>
-
-#define TEMPLATE_PREFIX "/"
-#define TEMPLATE_PREFIX_LENGTH 1
-#define TEMPLATE_SUFFIX ".template"
-#define TEMPLATE_SUFFIX_LENGTH 9
-#define TEMPLATE_EXTRA_LENGTH TEMPLATE_PREFIX_LENGTH+TEMPLATE_SUFFIX_LENGTH
-
-int template(int);
-
-#endif
\ No newline at end of file
diff --git a/src/add.c b/src/add.c
deleted file mode 100644
index 199177e..0000000
--- a/src/add.c
+++ /dev/null
@@ -1,70 +0,0 @@
-#include<add.h>
-
-int add(char *path) {
-	char ls_tree_result[LS_TREE_ENTRY_LENGTH];
-
-	if(NULL==path) { return EXIT_FAILURE; }
-
-	// verify not attempting to add same file again
-	if(branch_exists()>0) {
-		ls_tree_result[0] = 0;
-		if(git_ls_tree(path,ls_tree_result,LS_TREE_ENTRY_LENGTH)<0) { return EXIT_FAILURE; }
-		if(ls_tree_result[0]!=0) {
-			log_message(LOG_LEVEL_ERRORS,ADD_MESSAGE_ALREADY_ADDED,path);
-			return EXIT_FAILURE;
-		}
-	}
-
-	char filename[] = "/tmp/XXXXXX";
-	int fd = mkstemp(filename);
-	if(fd<0) { return EXIT_FAILURE; }
-
-	log_message(LOG_LEVEL_VERBOSE,ADD_MESSAGE_TEMP_FILENAME,filename);
-	
-	if(NULL!=global_opts.template) {
-		if(template(fd)<0) {
-			close(fd);
-			return EXIT_FAILURE;
-		}
-	}
-
-	close(fd);
-
-	if(add_to_index(filename,path)<0) { return EXIT_FAILURE; }
-
-	log_message(LOG_LEVEL_DEFAULT,ADD_MESSAGE_ADDED_FILE,path);
-
-	return EXIT_SUCCESS;
-}
-
-int add_to_index(char *tmp_filename, char *path) {
-	char file_hash[HASH_BUF_LENGTH];
-	int i;
-
-	if(editor(tmp_filename)<0) { goto cleanup; }
-
-	// add tmp file to index
-	if(git_hash_object(tmp_filename,HASH_OBJECT_ADD_TO_INDEX,file_hash,HASH_BUF_LENGTH)<0) { goto cleanup; }
-
-	log_message(LOG_LEVEL_VERBOSE,ADD_MESSAGE_ADDED_FILE_INDEX_HASH,path,file_hash);
-
-	// delete file
-	if(remove(tmp_filename)!=0) { return -1; }
-	
-	if(NULL!=global_opts.path_prefix) {
-		char *tmp = malloc(sizeof(char)*(strlen(path)+strlen(global_opts.path_prefix)+1));
-		if(NULL==tmp) { return -1; }
-
-		strcpy(tmp,global_opts.path_prefix);
-		strcat(tmp,path);
-
-		path = tmp;
-	}
-
-	if(commit(file_hash,HASH_BUF_LENGTH,path)<0) { return -1; }
-
-	return 1;
-	cleanup:
-		remove(tmp_filename);
-		return -1;
-}
\ No newline at end of file
diff --git a/src/branch.c b/src/branch.c
deleted file mode 100644
index 72ccf74..0000000
--- a/src/branch.c
+++ /dev/null
@@ -1,115 +0,0 @@
-#include<branch.h>
-
-int branch(char *commit_hash, size_t commit_hash_len) {
-	char *p;
-	int i;
-
-	assert(commit_hash_len==HASH_BUF_LENGTH);
-
-	if((i = branch_exists())<=0) {
-		log_message(LOG_LEVEL_VERBOSE,BRANCH_MISSING_MESSAGE,global_opts.branch);
-		if(i<0) { return -1; }
-		if(branch_create()<0) { return -1; }
-	}
-
-	// store current branch into global_opts.working_branch
-	if(git_rev_parse(REV_PARSE_BRANCH_NAME,global_opts.working_branch,WORKING_BRANCH_BUF_SIZE)<0) {
-		log_message(LOG_LEVEL_ERRORS,BRANCH_WORKING_BRANCH_ERROR_MESSAGE);
-		return -1;
-	}
-
-	// git rev-parse returns branch with \n at the end
-	while(i++<WORKING_BRANCH_BUF_SIZE) {
-		if(global_opts.working_branch[i]=='\0') { break; }
-		if(global_opts.working_branch[i]=='\n') {
-			global_opts.working_branch[i] = '\0';
-			break;
-		}
-	}
-
-	/* switch to extra branch and reset index
-	 * 1. git symbolic-ref HEAD refs/heads/[BRANCH_NAME]
-	 * 2. git reset
-	 */
-
-	p = prepend("refs/heads/",global_opts.branch); // see git.c:365
-	if(NULL==p) { return -1; }
-	if(git_symbolic_ref(p)<0) { return -1; }
-	free(p);
-
-	if(git_reset()<0) { return -1; }
-
-	// store current commit's hash in buf
-	if(git_rev_parse(REV_PARSE_HASH,commit_hash,HASH_BUF_LENGTH)<0) {
-		log_message(LOG_LEVEL_ERRORS,BRANCH_WORKING_BRANCH_ERROR_MESSAGE);
-		return -1;
-	}
-
-	return 1;
-}
-
-int branch_create() {
-	char tree_hash[HASH_BUF_LENGTH];
-	char commit_hash[HASH_BUF_LENGTH];
-	char *p;
-	
-	/* 
-	 * create blank branch if global_opts.branch doesn't exist:
-	 * 1. echo "" | git mktree --batch
-	 * 2. git commit-tree -m "init" [HASH from (1)]
-	 * 3. git update-ref refs/heads/[global_opts.branch] [HASH from (2)]
-	 */
-
-	// 1.)
-	if(git_mktree(tree_hash,HASH_BUF_LENGTH)<0) { return -1; }
-
-	// 2.)
-	char init_message[] = "init";
-	p = global_opts.message;
-	global_opts.message = init_message;
-	if(git_commit_tree(tree_hash,NULL,commit_hash,HASH_BUF_LENGTH)<0) { return -1; }
-	global_opts.message = p;
-		
-	// 3.)
-	p = prepend("refs/heads/",global_opts.branch);
-	if(NULL==p) { return -1; }
-	if(git_update_ref(commit_hash,p)<0) { return -1; }
-	free(p);
-
-	log_message(LOG_LEVEL_VERBOSE,BRANCH_CREATED_MESSAGE,global_opts.branch);
-
-	return 1;
-}
-
-int branch_exists() {
-	char output[HASH_BUF_LENGTH];
-	int i;
-	
-	output[0] = 0;
-	if(git_branch(output,HASH_BUF_LENGTH)<0) { return -1; }
-	
-	if(output[0]!=0) {
-		return 1;
-	}
-	return 0;
-}
-
-int branch_reset() {
-	char *p;
-
-	log_message(LOG_LEVEL_VERBOSE,BRANCH_RESET_MESSAGE,global_opts.working_branch);
-
-	/* switch back to working branch and reset index
-	 * 1. git symbolic-ref HEAD refs/heads/[WORKING_BRANCH_NAME]
-	 * 2. git reset
-	 */
-
-	p = prepend("refs/heads/",global_opts.working_branch);
-	if(NULL==p) { return -1; }
-	if(git_symbolic_ref(p)<0) { return -1; }
-	free(p);
-
-	if(git_reset()<0) { return -1; }
-
-	return 1;
-}
\ No newline at end of file
diff --git a/src/cat.c b/src/cat.c
deleted file mode 100644
index 1900b92..0000000
--- a/src/cat.c
+++ /dev/null
@@ -1,14 +0,0 @@
-#include<cat.h>
-
-int cat(char *path) {
-	char ls_tree_result[LS_TREE_ENTRY_LENGTH];
-	
-	if(NULL==path) { return EXIT_FAILURE; }
-
-	// get reference to path in branch
-	if(git_ls_tree(path,ls_tree_result,LS_TREE_ENTRY_LENGTH)<0) { return EXIT_FAILURE; }
-	
-	if(git_cat_file(&(ls_tree_result[LS_TREE_PREFIX_LENGTH]))<0) { return EXIT_FAILURE; }
-	
-	return EXIT_SUCCESS;
-}
\ No newline at end of file
diff --git a/src/commit.c b/src/commit.c
deleted file mode 100644
index 3588858..0000000
--- a/src/commit.c
+++ /dev/null
@@ -1,44 +0,0 @@
-#include<commit.h>
-
-int commit(char *file_hash, size_t file_hash_len, char *path) {
-	char prev_commit_hash[HASH_BUF_LENGTH];
-	char tree_hash[HASH_BUF_LENGTH];
-	char commit_hash[HASH_BUF_LENGTH];
-	char *p;
-	int i;
-
-	assert(file_hash_len==HASH_BUF_LENGTH);
-
-	if(branch(prev_commit_hash,HASH_BUF_LENGTH)<0) { return -1; }
-
-	/*
-	 * add object to tree from cache using git update-index
-	 * and update extra branch's ref to point at new commit:
-	 * 1. git update-index --add --cacheinfo 100644 [FILE_HASH] [PATH]
-	 * 2. git write-tree
-	 * 3. git commit-tree -m "[COMMIT_MESSAGE]" [HASH from (2)] -p [PARENT_COMMIT_HASH]
-	 * 4. git update-ref refs/heads/[EXTRA_BRANCH_NAME] [HASH from (3)]
-	 */
-
-	// 1.)
-	if(git_update_index(file_hash,path)<0) { goto reset; }
-
-	// 2.)
-	if(git_write_tree(tree_hash,HASH_BUF_LENGTH)<0) { goto reset; }
-
-	// 3.)
-	if(git_commit_tree(tree_hash,prev_commit_hash,commit_hash,HASH_BUF_LENGTH)<0) { goto reset; }
-	
-	// 4.)
-	p = prepend("refs/heads/",global_opts.branch);
-	if(NULL==p) { goto reset; }
-	if(git_update_ref(commit_hash,p)<0) { goto reset; }
-	free(p);
-	
-	if(branch_reset()<0) { return -1; }
-	
-	return 1;
-	reset:
-		if(branch_reset()<0) { return -1; }
-		return -1;
-}
\ No newline at end of file
diff --git a/src/default.c b/src/default.c
deleted file mode 100644
index ae78ef6..0000000
--- a/src/default.c
+++ /dev/null
@@ -1,78 +0,0 @@
-#include<default.h>
-
-struct options global_opts = {NULL,NULL,NULL,NULL,NULL,GIT_LS_TREE_OPTION_FULL};
-
-int defaults() {
-	default_branch();
-	if(default_editor()<0) { return -1; }
-	if(default_path_prefix()<0) { return -1; }
-
-	return 1;
-}
-
-void default_branch() {
-	global_opts.branch = getenv("GIT_EX_BRANCH");
-	if(NULL==global_opts.branch) {
-		global_opts.branch = "extra";
-	}
-}
-
-int default_editor() {
-	/*
-	 * editor can be found in multiple places: (ordered by priority)
-	 * -passed in via option (handled in main.c (called after this)
-	 * -EDITOR env variable
-	 * -git config
-	*/
-	global_opts.editor = getenv("EDITOR");
-	if(NULL==global_opts.editor) {
-		char tmp[100]; // should be no longer than this; copying to global_opts below
-
-		if(git_config("core.editor",tmp,100)<0) {
-			/*
-			 * will error out if core.editor
-			 * not set, proceed
-			 */
-			return 1;
-		}
-
-		int i = strlen(tmp);
-		if(i>0) {
-			global_opts.editor = malloc(sizeof(char)*(i+1));
-			strcpy(global_opts.editor,tmp);
-		}
-	}
-
-	return 1;
-}
-
-int default_path_prefix() {
-	/*
-	 * generate path prefix for when not working in git root directory
-	 */
-	char *cwd,*root;
-	int i,cwd_len,root_len;
-
-	cwd = getcwd(NULL,0);
-	if(NULL==cwd) { return -1; }
-
-	// root will be at least as long as cwd
-	cwd_len = strlen(cwd)+1;
-	root = malloc(sizeof(char)*cwd_len);
-	if(NULL==root) { return -1; }
-
-	if(git_rev_parse(REV_PARSE_TOP_LEVEL,root,cwd_len)<0) { return -1; }
-	
-	cwd_len--;
-	root_len = strlen(root);
-
-	if(root_len<cwd_len) {
-		global_opts.path_prefix = malloc(sizeof(char)*(cwd_len-root_len+2));
-		strcpy(global_opts.path_prefix,&(cwd[root_len]));
-		strcat(global_opts.path_prefix,"/");
-	}
-	
-	free(cwd);
-
-	return 1;
-}
\ No newline at end of file
diff --git a/src/edit.c b/src/edit.c
deleted file mode 100644
index 73c5f57..0000000
--- a/src/edit.c
+++ /dev/null
@@ -1,38 +0,0 @@
-#include<edit.h>
-
-int edit(char *path) {
-	char file_hash[HASH_BUF_LENGTH];
-	fpos_t pos;
-	int fd;
-
-	if(NULL==path) { return EXIT_FAILURE; }
-
-	char filename[] = "/tmp/XXXXXX";
-	fd = mkstemp(filename);
-	close(fd);
-
-	log_message(LOG_LEVEL_VERBOSE,EDIT_MESSAGE_TEMP_FILENAME,filename);
-
-	// redirect stdout to tmp file
-	fd = dup(fileno(stdout));
-	if(NULL==freopen(filename,"w",stdout)) {
-		perror("freopen() failed");
-		return EXIT_FAILURE;
-	}
-
-	fflush(stdout);
-	
-	if(cat(path)!=EXIT_SUCCESS) { return EXIT_FAILURE; }
-
-	// reset stdout
-	while((dup2(fd,fileno(stdout))==-1)&&(errno==EINTR)) {}
-	close(fd);
-	clearerr(stdout);
-	fsetpos(stdout,&pos); /* for C9X */
-
-	if(add_to_index(filename,path)<0) { return EXIT_FAILURE; }
-
-	log_message(LOG_LEVEL_DEFAULT,EDIT_MESSAGE_EDITTED_FILE,path);
-
-	return EXIT_SUCCESS;
-}
\ No newline at end of file
diff --git a/src/editor.c b/src/editor.c
deleted file mode 100644
index 54bcee3..0000000
--- a/src/editor.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include<editor.h>
-
-int editor(char *filename) {
-	char pre_edit_hash[HASH_BUF_LENGTH];
-	char post_edit_hash[HASH_BUF_LENGTH];
-
-	if(NULL==filename) { return -1; }
-
-	if(NULL==global_opts.editor) {
-		log_message(LOG_LEVEL_ERRORS,EDITOR_MESSAGE_MISSING_EDITOR);
-		return -1;
-	}
-
-	if(hash(filename,pre_edit_hash,HASH_BUF_LENGTH)<0) { return -1; }
-
-	wordexp_t result;
-
-	if(wordexp(global_opts.editor,&result,WRDE_NOCMD)!=0) { goto clean; }
-	if(wordexp(filename,&result,WRDE_APPEND)!=0) { goto clean; }
-	if(exec_cmd_with_stds(result.we_wordv)<0) { goto clean; }
-
-	wordfree(&result);
-
-	if(hash(filename,post_edit_hash,HASH_BUF_LENGTH)<0) { return -1; }
-
-	if(memcmp(pre_edit_hash,post_edit_hash,HASH_BUF_LENGTH)==0) {
-		log_message(LOG_LEVEL_DEFAULT,EDITOR_MESSAGE_NO_CHANGE);
-		return -1;
-	}
-
-	return 1;
-	clean:
-		wordfree(&result);
-		return -1;
-}
\ No newline at end of file
diff --git a/src/exec.c b/src/exec.c
deleted file mode 100644
index b4922bf..0000000
--- a/src/exec.c
+++ /dev/null
@@ -1,121 +0,0 @@
-#include<exec.h>
-
-int exec_cmd(char **argv, char *input, char *output, size_t output_len) {
-	int parent_to_child_fds[2];
-	int child_to_parent_fds[2];
-
-	if(pipe(parent_to_child_fds)==-1) {
-		perror("pipe() failed");
-		return -1;
-	}
-
-	if(pipe(child_to_parent_fds)==-1) {
-		perror("pipe() failed");
-		return -1;
-	}
-
-	pid_t pid = fork();
-	if(pid==-1) {
-		perror("fork() failed");
-		return -1;
-	} else if(pid==0) { // child
-		int i = 0;
-		while(argv[i]!=NULL) {
-			log_message(LOG_LEVEL_VERBOSE,"%s ",argv[i]);
-			i++;
-		}
-
-		while((dup2(parent_to_child_fds[0],STDIN_FILENO)==-1)&&(errno==EINTR)) {}
-		while((dup2(child_to_parent_fds[1],STDOUT_FILENO)==-1)&&(errno==EINTR)) {}
-		close(parent_to_child_fds[0]);
-		close(parent_to_child_fds[1]);
-		close(child_to_parent_fds[0]);
-		close(child_to_parent_fds[1]);
-
-		execvp(argv[0],argv);
-		perror("execvp() failed");
-		exit(1);
-	}
-	
-	close(child_to_parent_fds[1]);
-
-	if(NULL!=input) {
-		while(1) {
-			ssize_t count = write(parent_to_child_fds[1],input,strlen(input)+1);
-			if(-1==count) {
-				if(EINTR==errno) {
-					// allow for retry if interrupted
-					continue;
-				} else {
-					perror("read() failed");
-					return -1;
-				}
-			}
-			break;
-		}
-	}
-
-	close(parent_to_child_fds[0]);
-	close(parent_to_child_fds[1]);
-
-	int status = 0;
-	if(wait(&status)==-1) {
-		perror("wait() failed");
-		return -1;
-	}
-
-	if(status!=0) {
-		log_message(LOG_LEVEL_VERBOSE,EXEC_INVALID_RETURN_STATUS,argv[0],status);
-		return -1;
-	}
-
-	if(NULL!=output) {
-		while(1) {
-			ssize_t count = read(child_to_parent_fds[0],output,output_len);
-			if(-1==count) {
-				if(EINTR==errno) {
-					// allow for retry if interrupted
-					continue;
-				} else {
-					perror("read() failed");
-					return -1;
-				}
-			}
-			break;
-		}
-
-		// remove final newline from output (if exists)
-		strtok(output,"\n");
-		// make sure that output ends w/ '\0'
-		output[output_len-1] = '\0';
-	}
-
-	close(child_to_parent_fds[0]);
-	
-	return 1;
-}
-
-int exec_cmd_with_stds(char **argv) {
-	pid_t pid = fork();
-	if(pid==-1) {
-		perror("fork() failed");
-		return -1;
-	} else if(pid==0) { // child
-		execvp(argv[0],argv);
-		perror("execvp() failed");
-		exit(1);
-	}
-
-	int status = 0;
-	if(wait(&status)==-1) {
-		perror("wait() failed");
-		return -1;
-	}
-
-	if(status!=0) {
-		log_message(LOG_LEVEL_VERBOSE,EXEC_INVALID_RETURN_STATUS,argv[0],status);
-		return -1;
-	}
-
-	return 1;
-}
\ No newline at end of file
diff --git a/src/git.c b/src/git.c
deleted file mode 100644
index 57c402b..0000000
--- a/src/git.c
+++ /dev/null
@@ -1,24 +0,0 @@
-#include<git.h>
-
-char *argv[10];
-
-int git(enum git_exec_flags flags, char *input, char *output, size_t output_len, ...) {
-	va_list args;
-	va_start(args,output_len);
-	int i;
-
-	memset(argv,0,sizeof argv);
-
-	i = 0;
-	while(1) {
-		argv[i] = va_arg(args,char*);
-		if(NULL==argv[i]) { break; }
-		i++;
-	}
-	va_end(args);
-	
-	if(flags&GIT_EXEC_FLAG_WITH_STDS) {
-		return exec_cmd_with_stds(argv);
-	}
-	return exec_cmd(argv,input,output,output_len);
-}
\ No newline at end of file
diff --git a/src/hash.c b/src/hash.c
deleted file mode 100644
index 663844f..0000000
--- a/src/hash.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include<hash.h>
-
-int hash(char *filename, char *buf, int buf_len) {
-	assert(buf_len==HASH_BUF_LENGTH);
-
-	if(git_hash_object(filename,HASH_OBJECT_DEFAULT,buf,HASH_BUF_LENGTH)<0) { return -1; }
-
-	return 1;
-}
\ No newline at end of file
diff --git a/src/log.c b/src/log.c
deleted file mode 100644
index 69303e3..0000000
--- a/src/log.c
+++ /dev/null
@@ -1,14 +0,0 @@
-#include<log.h>
-
-int verbose_flag = LOG_LEVEL_DEFAULT;
-
-void log_message(enum log_level level, const char *format,...) {
-	if(verbose_flag>=0) {
-		if(level<=verbose_flag) {
-			va_list args;
-			va_start(args,format);
-			vprintf(format,args);
-			va_end(args);
-		}
-	}
-}
\ No newline at end of file
diff --git a/src/ls.c b/src/ls.c
deleted file mode 100644
index bf676c8..0000000
--- a/src/ls.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include<ls.h>
-
-int ls(int ls_flag) {
-	log_message(LOG_LEVEL_VERBOSE,"flag: %d\n",ls_flag);
-	global_opts.ls_options = (GIT_LS_TREE_OPTION_FULL==ls_flag)?GIT_LS_TREE_OPTION_FULL:GIT_LS_TREE_OPTION_NAME_ONLY;
-	
-	log_message(LOG_LEVEL_VERBOSE,LS_MESSAGE_TREE_LEVEL,ls_flag);
-
-	// get list of files based on directory relative to git root
-	if(git_ls_tree(NULL,NULL,0)<0) { return EXIT_FAILURE; }
-	
-	return EXIT_SUCCESS;
-}
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
deleted file mode 100644
index 2e57811..0000000
--- a/src/main.c
+++ /dev/null
@@ -1,104 +0,0 @@
-#include<main.h>
-
-/*
- * main sets the following flags
- * int verbose_flag (defined in log.c)
- */
-
-int ls_flag = GIT_LS_TREE_OPTION_DEFAULT;
-
-static struct option long_options[] = {
-	{"long", no_argument, &ls_flag, GIT_LS_TREE_OPTION_FULL},
-	{"verbose", no_argument, &verbose_flag, LOG_LEVEL_VERBOSE},
-	{"quiet", no_argument, &verbose_flag, LOG_LEVEL_SILENT},
-	{"branch", required_argument, 0, 'b'},
-	{"editor", required_argument, 0, 'e'},
-	{"message", required_argument, 0, 'm'},
-	{"template", required_argument, 0, 't'},
-	{0,0,0,0}
-};
-
-int main(int argc, char **argv) {
-	if(defaults()<0) { return EXIT_FAILURE; }
-
-	int c;
-
-	while(1) {
-		int option_index = 0;
-
-		if((c = getopt_long(argc,argv,"vqm:b:e:lt:",long_options,&option_index))==-1) { break; }
-
-		switch(c) {
-			case 0:
-				if(long_options[option_index].flag!=0) { break; }
-
-				log_message(LOG_LEVEL_VERBOSE,"option %s",long_options[option_index].name);
-				if(optarg) {
-					log_message(LOG_LEVEL_VERBOSE," with arg %s",optarg);
-				}
-				log_message(LOG_LEVEL_VERBOSE,"\n");
-				return EXIT_FAILURE;
-				
-				break;
-			case 'b':
-				global_opts.branch = optarg;
-				break;
-			case 'e':
-				if(NULL!=global_opts.editor) {
-					free(global_opts.editor);
-				}
-				global_opts.editor = optarg;
-				break;
-			case 'l':
-				ls_flag = GIT_LS_TREE_OPTION_FULL;
-				break;
-			case 'm':
-				global_opts.message = optarg;
-				break;
-			case 'q':
-				verbose_flag = LOG_LEVEL_ERRORS;
-				break;
-			case 't':
-				global_opts.template = optarg;
-				break;
-			case 'v':
-				verbose_flag = LOG_LEVEL_VERBOSE;
-				break;
-			case '?':
-			default:
-				return EXIT_FAILURE;
-		}
-	}
-
-	log_message(LOG_LEVEL_VERBOSE,MAIN_BRANCH_SET_MESSAGE,global_opts.branch);
-	log_message(LOG_LEVEL_VERBOSE,MAIN_EDITOR_SET_MESSAGE,global_opts.editor);
-
-	if(optind<argc) {
-		char *p = argv[optind];
-		if(strcmp(MAIN_SUBCOMMAND_ADD,p)==0) {
-			if(optind+2==argc) { // 1 extra arg: path
-				return add(argv[optind+1]);
-			}
-		} else if(strcmp(MAIN_SUBCOMMAND_CAT,p)==0) {
-			if(optind+2==argc) { // 1 extra arg: path
-				return cat(argv[optind+1]);
-			}
-		} else if(strcmp(MAIN_SUBCOMMAND_EDIT,p)==0) {
-			if(optind+2==argc) { // 1 extra arg: path
-				return edit(argv[optind+1]);
-			}
-		} else if(strcmp(MAIN_SUBCOMMAND_LS,p)==0) {
-			if(optind+1==argc) {
-				return ls(ls_flag);
-			}
-		} else {
-			log_message(LOG_LEVEL_ERRORS,MAIN_UNKNOWN_SUBCOMMAND_MESSAGE,p);
-			return EXIT_FAILURE;
-		}
-	} else {
-		return ls(ls_flag);
-	}
-
-	log_message(LOG_LEVEL_ERRORS,MAIN_WRONG_NUMBER_ARGS);
-	return EXIT_FAILURE;
-}
\ No newline at end of file
diff --git a/src/prepend.c b/src/prepend.c
deleted file mode 100644
index f6c02fe..0000000
--- a/src/prepend.c
+++ /dev/null
@@ -1,23 +0,0 @@
-#include<prepend.h>
-
-char *prepend(char *prefix, char *str) {
-	char *p;
-	int len;
-
-	assert(prefix!=NULL);
-
-	if(NULL==str) { return NULL; }
-	
-	len = strlen(str);
-	len += strlen(prefix);
-	
-	//sanity check len - no way branch name should be this large
-	if(len>100) { return NULL; }
-
-	p = malloc(sizeof(char)*(len));
-	
-	strcpy(p,prefix);
-	strcat(p,str);
-
-	return p;
-}
\ No newline at end of file
diff --git a/src/templ.c b/src/templ.c
deleted file mode 100644
index e2e62e9..0000000
--- a/src/templ.c
+++ /dev/null
@@ -1,73 +0,0 @@
-#include<templ.h>
-
-int template(int tmp_fd) {
-	/*
-	 * copy template to temp file (if exists)
-	 * will treat global_opts.template as a full path first,
-	 * then search [ADD_TEMPLATE_PREFIX].template (see add.h)
-	 */
-
-	if(NULL==global_opts.template) { return 0; }
-
-	FILE *fp = fopen(global_opts.template,"r");
-	if(NULL==fp) {
-		int len = strlen(global_opts.template);
-		
-		/*
-		 * this is defined using autotools and
-		 * can be modified with ./configure. See 
-		 * templatesdir varible in top-level
-		 * Makefile.am.
-		 */
-		char templatedir[] = TEMPLATE_DIR;
-		len += strlen(templatedir);
-		
-		char *fullname = malloc(sizeof(char)*(len+TEMPLATE_EXTRA_LENGTH+1));
-		if(NULL==fullname) { return -1; }
-
-		strcpy(fullname,TEMPLATE_DIR);
-		strcat(fullname,TEMPLATE_PREFIX);
-		strcat(fullname,global_opts.template);
-		strcat(fullname,TEMPLATE_SUFFIX);
-
-		fp = fopen(fullname,"r");
-
-		free(fullname);
-	}
-
-	if(fp==NULL) { return 0; }
-	
-	if(0!=fseek(fp,0,SEEK_END)) {
-		perror("fseek() failed");
-		return -1;
-	}
-
-	long size = ftell(fp);
-	if(size<0) {
-		perror("ftell() failed");
-		return -1;
-	}
-
-	rewind(fp);
-
-	size_t count = size;
-
-	int template_fd = fileno(fp);
-	off_t off = 0;
-	while(count>0) {
-		ssize_t sent = sendfile(tmp_fd,template_fd,&off,count);
-		if(sent<0) {
-			perror("sendfile() failed");
-			fclose(fp);
-			return -1;
-		}
-		count -= sent;
-	}
-
-	if(0!=fclose(fp)) {
-		perror("fclose() failed");
-		return -1;
-	}
-
-	return 1;
-}
\ No newline at end of file
diff --git a/test/add.tests.sh b/test/add.tests.sh
new file mode 100755
index 0000000..ac7283a
--- /dev/null
+++ b/test/add.tests.sh
@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+EDITOR="sh -c 'echo \"alskdjfalskdfjsadf\" >> \"%s\"'"
+
+set +e
+(add > result 2>&1)
+EXPECTED=$'creating branch '
+EXPECTED+="$BRANCH"
+EXPECTED+=$'\nno path given to add\n'
+EXPECTED+="$USAGE"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+(add test test2 > result 2>&1)
+EXPECTED=$'no path given to add\n'
+EXPECTED+="$USAGE"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+TEMPLATE="notanexistingtemplate"
+(add test > result 2>&1)
+EXPECTED="template 'notanexistingtemplate' doesn't exist"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+TEMPLATE=
+
+set -e
+
+add "todo" > result 2>&1
+TEMP=`head -n 1 result | sed 's/opening temporary file //' | tr -d "'"`
+EXPECTED="opening temporary file '$TEMP'"
+EXPECTED+=$'\nadding todo to index\nreseting branch back to '
+EXPECTED+="$WORKING_BRANCH"
+EXPECTED+=$'\nadded todo'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+EXPECTED=$'100644 blob b2fd069fbb2dfb5f9e7fa3245e763a3cae08ef43\ttodo'
+assert "$EXPECTED" "`git ls-tree $BRANCH`"
+
+set +e
+
+(add "todo" > result 2>&1)
+EXPECTED=$'file \'todo\' already exists; did you mean to edit \'todo\' instead?\n'
+EXPECTED+="$USAGE"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+set -e
+
+TEMPLATE="test.txt"
+add "test1copy" > result 2>&1
+TEMP=`head -n 2 result | tail -n 1 | sed 's/opening temporary file//' | tr -d "'" | tr -d " "`
+EXPECTED="using template '$TEMPLATE'"
+EXPECTED+=$'\nopening temporary file '
+EXPECTED+="'$TEMP'"
+EXPECTED+=$'\nadding test1copy to index'
+EXPECTED+=$'\nreseting branch back to master\nadded test1copy'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+EXPECTED=$'100644 blob ce643f67f68e645a58da5b64d77f18dbc5e8c1f9\ttest1copy\n100644 blob b2fd069fbb2dfb5f9e7fa3245e763a3cae08ef43\ttodo'
+assert "$EXPECTED" "`git ls-tree $BRANCH`"
+TEMPLATE=
+
+test_succeeded
diff --git a/test/add_to_index.tests.sh b/test/add_to_index.tests.sh
new file mode 100755
index 0000000..f55d297
--- /dev/null
+++ b/test/add_to_index.tests.sh
@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+
+TEMP=`mktemp`
+echo "alksdjflaksdjfklajsdkflj" > "$TEMP"
+
+add_to_index "$TEMP" "todo" > result 2>&1
+EXPECTED=$'adding todo to index\ncreating branch '
+EXPECTED+="$BRANCH"
+EXPECTED+=$'\nreseting branch back to '
+EXPECTED+="$WORKING_BRANCH"
+RESULT=$(<result)
+
+assert "$EXPECTED" "$RESULT"
+
+EXPECTED=$'100644 blob 363c8e40561f98736e889697d86ca66178997cff\ttodo'
+assert "$EXPECTED" "`git ls-tree $BRANCH`"
+EXPECTED=$'100644 blob c8ced6bb17c2965c058f5cdb5677cb8cd9091f9c\thi/test/nope/what/test3.txt\n100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest.txt\n100644 blob a8453014c7d0581a0d904792f009f1ad7ff477a1\ttest2.txt'
+assert "$EXPECTED" "`git ls-tree -r $WORKING_BRANCH`"
+assert "$EXPECTED" "`git ls-tree -r HEAD`"
+
+test_succeeded
diff --git a/test/branch_create.tests.sh b/test/branch_create.tests.sh
new file mode 100755
index 0000000..8408fa9
--- /dev/null
+++ b/test/branch_create.tests.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+assert "0" "`git branch --list $BRANCH | wc -c`"
+
+LOG_LEVEL=info
+branch_create > result 2>&1
+EXPECTED="creating branch $BRANCH"
+RESULT=$(<result)
+
+assert "$EXPECTED" "$RESULT"
+
+assert "13" "`git branch --list $BRANCH | wc -c`"
+assert "" "`git ls-tree $BRANCH`"
+
+test_succeeded
diff --git a/test/branch_exists.tests.sh b/test/branch_exists.tests.sh
new file mode 100755
index 0000000..0d360e6
--- /dev/null
+++ b/test/branch_exists.tests.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+LOG_LEVEL=info
+
+set +e
+BRANCH="mas.."
+(branch_exists > result 2>&1)
+EXPECTED="creating branch $BRANCH"
+# NOTE: this normally would stop after first fatal, but since set +e above, has second fatal error
+EXPECTED+=$'\nfatal: \'mas..\' is not a valid branch name\nfatal: update_ref failed for ref \'refs/heads/mas..\': refusing to update ref with bad name \'refs/heads/mas..\''
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+set -e
+
+assert "0" "`git branch --list $BRANCH | wc -c`"
+
+BRANCH="testbranch"
+assert "0" "`git branch --list $BRANCH | wc -c`"
+
+branch_exists > result 2>&1
+EXPECTED="creating branch $BRANCH"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+assert "13" "`git branch --list $BRANCH | wc -c`"
+assert "" "`git ls-tree $BRANCH`"
+
+test_succeeded
diff --git a/test/branch_hash.tests.sh b/test/branch_hash.tests.sh
new file mode 100755
index 0000000..70d637f
--- /dev/null
+++ b/test/branch_hash.tests.sh
@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+
+EXPECTED=$'100644 blob c8ced6bb17c2965c058f5cdb5677cb8cd9091f9c\thi/test/nope/what/test3.txt\n100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest.txt\n100644 blob a8453014c7d0581a0d904792f009f1ad7ff477a1\ttest2.txt'
+assert "$EXPECTED" "`git ls-tree -r HEAD`"
+
+branch_hash > result 2>&1
+EXPECTED="creating branch $BRANCH"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+assert "master" "$WORKING_BRANCH"
+assert "41" "`echo $PREV_COMMIT | wc -c`"
+assert "" "`git ls-tree $PREV_COMMIT`"
+
+assert "" "`git ls-tree HEAD`"
+
+test_succeeded
diff --git a/test/branch_reset.tests.sh b/test/branch_reset.tests.sh
new file mode 100755
index 0000000..06048e1
--- /dev/null
+++ b/test/branch_reset.tests.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+
+EXPECTED_TREE=$'100644 blob c8ced6bb17c2965c058f5cdb5677cb8cd9091f9c\thi/test/nope/what/test3.txt\n100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest.txt\n100644 blob a8453014c7d0581a0d904792f009f1ad7ff477a1\ttest2.txt'
+assert "$EXPECTED_TREE" "`git ls-tree -r HEAD`"
+
+branch_hash > result 2>&1
+EXPECTED="creating branch $BRANCH"
+RESULT=$(<result)
+
+assert "$EXPECTED" "$RESULT"
+
+assert "master" "$WORKING_BRANCH"
+assert "" "`git ls-tree $PREV_COMMIT`"
+
+assert "$PREV_COMMIT" "`git rev-parse HEAD`"
+
+branch_reset > result 2>&1
+EXPECTED="reseting branch back to $WORKING_BRANCH"
+RESULT=$(<result)
+
+assert "$EXPECTED" "$RESULT"
+assert "$EXPECTED_TREE" "`git ls-tree -r HEAD`"
+
+test_succeeded
diff --git a/test/cat_file.tests.sh b/test/cat_file.tests.sh
new file mode 100755
index 0000000..743fe6b
--- /dev/null
+++ b/test/cat_file.tests.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+EDITOR="sh -c 'echo \"alskdjfalskdfjsadf\" >> \"%s\"'"
+
+set +e
+(cat_file "notanexistingfile" > result 2>&1)
+EXPECTED=$'creating branch testbranch\nnotanexistingfile doesn\'t exist'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+set -e
+
+add "todo" > result 2>&1
+
+cat_file "todo" > result 2>&1
+EXPECTED="alskdjfalskdfjsadf"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+test_succeeded
diff --git a/test/edit.tests.sh b/test/edit.tests.sh
new file mode 100755
index 0000000..4c0b494
--- /dev/null
+++ b/test/edit.tests.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+EDITOR="sh -c 'echo \"alskdjfalskdfjsadf\" >> \"%s\"'"
+
+set +e
+(edit "todo" > result 2>&1)
+TEMP=`head -n 1 result | sed 's/editing todo using //' | tr -d "'"`
+EXPECTED="editing todo using $TEMP"
+EXPECTED+=$'\ncreating branch testbranch\ntodo doesn\'t exist'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+set -e
+
+add "todo" > result 2>&1
+
+edit "todo" > result 2>&1
+TEMP=`head -n 1 result | sed 's/editing todo using //' | tr -d "'"`
+EXPECTED="editing todo using $TEMP"
+EXPECTED+=$'\nopening temporary file \''
+EXPECTED+="$TEMP"
+EXPECTED+=$'\'\nadding todo to index\nreseting branch back to master\nsaved todo'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+cat_file "todo" > result 2>&1
+EXPECTED="alskdjfalskdfjsadf"
+EXPECTED+=$'\nalskdjfalskdfjsadf'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+test_succeeded
diff --git a/test/editor.tests.sh b/test/editor.tests.sh
new file mode 100755
index 0000000..31a1e63
--- /dev/null
+++ b/test/editor.tests.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="testbranch"
+LOG_LEVEL=info
+
+TEMP=`mktemp`
+
+set +e
+
+EDITOR="sh -c 'echo \"alskdjfalskdfjsadf\"'"
+(editor "$TEMP" > result 2>&1)
+EXPECTED="opening temporary file '$TEMP'"
+EXPECTED+=$'\nalskdjfalskdfjsadf\nno changes detected'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+EDITOR=
+git config --local core.editor "sh -c 'echo \"hello\"'"
+(editor "$TEMP" > result 2>&1)
+EXPECTED="opening temporary file '$TEMP'"
+EXPECTED+=$'\nno editor found, checking git config\nhello\nno changes detected'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+git config --local core.editor ""
+(editor "$TEMP" > result 2>&1)
+EXPECTED="opening temporary file '$TEMP'"
+EXPECTED+=$'\nno editor found, checking git config\nno editor defined; use --editor option, set EDITOR environmental variable, or set git config core.editor.'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+set -e
+
+EDITOR="sh -c 'echo \"alskdjfalskdfjsadf\" >> \"%s\"'"
+editor "$TEMP" > result 2>&1
+EXPECTED="opening temporary file '$TEMP'"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+test_succeeded
diff --git a/test/integration/Makefile.am b/test/integration/Makefile.am
deleted file mode 100644
index d48a721..0000000
--- a/test/integration/Makefile.am
+++ /dev/null
@@ -1,67 +0,0 @@
-EXTRA_DIST = \
-	index.js \
-	package.json \
-	package-lock.json \
-	test/utils.js \
-	test/ls.integration.tests.js \
-	test/cat.integration.tests.js \
-	test/edit.integration.tests.js \
-	test/add.integration.tests.js \
-	test/branch.pattern.integration.test.js
-
-if HAVE_DOCKER
-PACKAGE_CONTAINER_NAME=git_extra_package_init
-
-package_init:
-	docker run -d --name $(PACKAGE_CONTAINER_NAME) node:latest tail -f /dev/null
-	docker cp package.json $(PACKAGE_CONTAINER_NAME):/home/node/
-	docker cp package-lock.json $(PACKAGE_CONTAINER_NAME):/home/node/
-
-package_extract:
-	docker cp $(PACKAGE_CONTAINER_NAME):/home/node/package.json ./package.json
-	docker cp $(PACKAGE_CONTAINER_NAME):/home/node/package-lock.json ./package-lock.json
-	$(MAKE) -s package_stop
-
-package_stop:
-	docker stop $(PACKAGE_CONTAINER_NAME)
-	docker rm $(PACKAGE_CONTAINER_NAME)
-
-outdated: package_init
-	-docker exec -it -w /home/node $$(docker container ls -q -f name=$(PACKAGE_CONTAINER_NAME)) npm outdated
-	$(MAKE) -s package_stop
-
-update: package_init
-	-docker exec -it -w /home/node $$(docker container ls -q -f name=$(PACKAGE_CONTAINER_NAME)) /bin/bash
-	$(MAKE) -s package_extract
-
-inspect: package_init
-	docker exec -it $$(docker container ls -q -f name=$(PACKAGE_CONTAINER_NAME)) /bin/bash
-
-else
-build: missing-local
-run: missing-local
-extract: missing-local
-start: missing-local
-stop: missing-local
-package_init: missing-local
-package_extract: missing-local
-package_stop: missing-local
-outdated: missing-local
-update: missing-local
-inspect: missing-local
-missing-local:
-	@echo "docker not found"
-endif
-
-if HAVE_NODE
-all-local:
-	npm install
-
-check-local:
-	npm run test
-else
-all-local: missing-local
-check-local: missing-local
-missing-local:
-	@echo "node not found"
-endif
\ No newline at end of file
diff --git a/test/integration/index.js b/test/integration/index.js
deleted file mode 100644
index a14ab47..0000000
--- a/test/integration/index.js
+++ /dev/null
@@ -1 +0,0 @@
-console.log("Run `npm run test` to run integration tests");
\ No newline at end of file
diff --git a/test/integration/package-lock.json b/test/integration/package-lock.json
deleted file mode 100644
index bd1556a..0000000
--- a/test/integration/package-lock.json
+++ /dev/null
@@ -1,1166 +0,0 @@
-{
-  "name": "git-extra-integration-tests",
-  "version": "0.0.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "ansi-colors": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
-      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
-      "dev": true
-    },
-    "ansi-regex": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
-      "dev": true
-    },
-    "ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
-      "requires": {
-        "color-convert": "^2.0.1"
-      }
-    },
-    "anymatch": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.1.tgz",
-      "integrity": "sha512-mM8522psRCqzV+6LhomX5wgp25YVibjh8Wj23I5RPkPppSVSjyKD2A2mBJmWGa+KN7f2D6LNh9jkBCeyLktzjg==",
-      "dev": true,
-      "requires": {
-        "normalize-path": "^3.0.0",
-        "picomatch": "^2.0.4"
-      }
-    },
-    "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "requires": {
-        "sprintf-js": "~1.0.2"
-      }
-    },
-    "array.prototype.map": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array.prototype.map/-/array.prototype.map-1.0.2.tgz",
-      "integrity": "sha512-Az3OYxgsa1g7xDYp86l0nnN4bcmuEITGe1rbdEBVkrqkzMgDcbdQ2R7r41pNzti+4NMces3H8gMmuioZUilLgw==",
-      "dev": true,
-      "requires": {
-        "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.0-next.1",
-        "es-array-method-boxes-properly": "^1.0.0",
-        "is-string": "^1.0.4"
-      }
-    },
-    "balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-      "dev": true
-    },
-    "binary-extensions": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.1.0.tgz",
-      "integrity": "sha512-1Yj8h9Q+QDF5FzhMs/c9+6UntbD5MkRfRwac8DoEm9ZfUBZ7tZ55YcGVAzEe4bXsdQHEk+s9S5wsOKVdZrw0tQ==",
-      "dev": true
-    },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
-    "braces": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
-      "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
-      "dev": true,
-      "requires": {
-        "fill-range": "^7.0.1"
-      }
-    },
-    "browser-stdout": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
-      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
-      "dev": true
-    },
-    "camelcase": {
-      "version": "5.3.1",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
-      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
-      "dev": true
-    },
-    "chalk": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.0.tgz",
-      "integrity": "sha512-qwx12AxXe2Q5xQ43Ac//I6v5aXTipYrSESdOgzrN+9XjgEpyjpKuvSGaN4qE93f7TQTlerQQ8S+EQ0EyDoVL1A==",
-      "dev": true,
-      "requires": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      }
-    },
-    "chokidar": {
-      "version": "3.4.2",
-      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.4.2.tgz",
-      "integrity": "sha512-IZHaDeBeI+sZJRX7lGcXsdzgvZqKv6sECqsbErJA4mHWfpRrD8B97kSFN4cQz6nGBGiuFia1MKR4d6c1o8Cv7A==",
-      "dev": true,
-      "requires": {
-        "anymatch": "~3.1.1",
-        "braces": "~3.0.2",
-        "fsevents": "~2.1.2",
-        "glob-parent": "~5.1.0",
-        "is-binary-path": "~2.1.0",
-        "is-glob": "~4.0.1",
-        "normalize-path": "~3.0.0",
-        "readdirp": "~3.4.0"
-      }
-    },
-    "cliui": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
-      "integrity": "sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==",
-      "dev": true,
-      "requires": {
-        "string-width": "^3.1.0",
-        "strip-ansi": "^5.2.0",
-        "wrap-ansi": "^5.1.0"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
-          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
-          "dev": true
-        },
-        "string-width": {
-          "version": "3.1.0",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
-          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
-          "dev": true,
-          "requires": {
-            "emoji-regex": "^7.0.1",
-            "is-fullwidth-code-point": "^2.0.0",
-            "strip-ansi": "^5.1.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "5.2.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
-          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^4.1.0"
-          }
-        }
-      }
-    },
-    "color-convert": {
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-          "dev": true,
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-          }
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-          "dev": true
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-          "dev": true,
-          "requires": {
-            "emoji-regex": "^7.0.1",
-            "is-fullwidth-code-point": "^2.0.0",
-            "strip-ansi": "^5.1.0"
-          }
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-        "strip-ansi": {
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-          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
-          "dev": true,
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-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-14.2.3.tgz",
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-          "dev": true,
-          "requires": {
-            "cliui": "^5.0.0",
-            "decamelize": "^1.2.0",
-            "find-up": "^3.0.0",
-            "get-caller-file": "^2.0.1",
-            "require-directory": "^2.1.1",
-            "require-main-filename": "^2.0.0",
-            "set-blocking": "^2.0.0",
-            "string-width": "^3.0.0",
-            "which-module": "^2.0.0",
-            "y18n": "^4.0.0",
-            "yargs-parser": "^15.0.1"
-          }
-        },
-        "yargs-parser": {
-          "version": "15.0.1",
-          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-15.0.1.tgz",
-          "integrity": "sha512-0OAMV2mAZQrs3FkNpDQcBk1x5HXb8X4twADss4S0Iuk+2dGnLOE/fRHrsYm542GduMveyA77OF4wrNJuanRCWw==",
-          "dev": true,
-          "requires": {
-            "camelcase": "^5.0.0",
-            "decamelize": "^1.2.0"
-          }
-        }
-      }
-    }
-  }
-}
diff --git a/test/integration/package.json b/test/integration/package.json
deleted file mode 100644
index 268a7a1..0000000
--- a/test/integration/package.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "name": "git-extra-integration-tests",
-  "version": "0.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "test": "mocha"
-  },
-  "author": "",
-  "license": "UNLICENSED",
-  "devDependencies": {
-    "mocha": "^8.1.3"
-  }
-}
diff --git a/test/integration/test/add.integration.tests.js b/test/integration/test/add.integration.tests.js
deleted file mode 100644
index 13ed888..0000000
--- a/test/integration/test/add.integration.tests.js
+++ /dev/null
@@ -1,79 +0,0 @@
-const assert = require('assert');
-const util = require('util');
-
-const exec = util.promisify(require('child_process').exec);
-const fs_stat = util.promisify(require('fs').stat);
-const fs_readFile = util.promisify(require('fs').readFile);
-
-const {reset_env,setup_env} = require('./utils.js');
-
-describe('add integration tests', () => {
-
-	/*
-	 * This file should contain tests to test the full add functionality,
-	 * from parsing command line options and their interactions with adding files.
-	 * Should also test behavior of add which depends on state.
-	 */
-
-	beforeEach(async() => {
-		await reset_env();
-		await setup_env();	
-	});
-
-	it('should succeed when adding a new file', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex add hello.txt',{cwd:"/home/node/working"});
-			assert.deepStrictEqual(res,{stdout:'added hello.txt\n',stderr:''});
-		});
-	});
-
-	it('should fail when not given a file', async() => {
-		await assert.rejects(async() => await exec('git ex add',{cwd:"/home/node/working"}));
-	});
-
-	it('should succeed when given a valid template and verify template was applied', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex add -t bug hello.txt',{cwd:"/home/node/working"});
-			assert.deepStrictEqual(res,{stdout:'added hello.txt\n',stderr:''});
-
-			const expected = (await fs_readFile("/usr/local/share/git-extra/templates/bug.template","utf8"))+"hello\n";
-			const written = (await exec('git ex cat hello.txt',{cwd:"/home/node/working"})).stdout;
-
-			assert.deepStrictEqual(expected,written);
-		});
-	});
-
-	it(`should succeed when given a template which doesn't exist`, async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex add -t templatewhichdoesnotexist hello.txt',{cwd:"/home/node/working"});
-			assert.deepStrictEqual(res,{stdout:'added hello.txt\n',stderr:''});
-
-			const written = (await exec('git ex cat hello.txt',{cwd:"/home/node/working"})).stdout;
-			assert.deepStrictEqual("hello\n",written);
-		});
-	});
-
-	it('should fail when attempting to add a file that has already been added', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex add hello.txt',{cwd:"/home/node/working"});
-			assert.deepStrictEqual(res,{stdout:'added hello.txt\n',stderr:''});
-			
-			await assert.rejects(async() => await exec('git ex add hello.txt',{cwd:"/home/node/working"}));
-		});
-	});
-
-	it('should delete temporary file after adding', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex add -v hello.txt',{cwd:"/home/node/working"});
-			const index = res.stdout.indexOf("temporary file ");
-			assert(index>-1);
-			const tmp_filename = res.stdout.substr(index+15,11);
-			await assert.rejects(async() => fs_stat(tmp_filename));
-		});
-	});
-
-	after(async() => {
-		await reset_env();
-	});
-
-});
\ No newline at end of file
diff --git a/test/integration/test/branch.pattern.integration.test.js b/test/integration/test/branch.pattern.integration.test.js
deleted file mode 100644
index d0f6e8c..0000000
--- a/test/integration/test/branch.pattern.integration.test.js
+++ /dev/null
@@ -1,19 +0,0 @@
-const assert = require('assert');
-const util = require('util');
-
-const exec = util.promisify(require('child_process').exec);
-
-const {reset_env,setup_env} = require('./utils.js');
-
-describe('branch pattern integration test', () => {
-
-	before(async() => {
-		await reset_env();
-		await setup_env();
-	});
-
-	it('should fail when given a branch pattern instead of the full branch', async() => {
-		await assert.rejects(async() => await exec('git ex add -b mas* hello.txt',{cwd:"/home/node/working"}));
-	});
-
-});
\ No newline at end of file
diff --git a/test/integration/test/cat.integration.tests.js b/test/integration/test/cat.integration.tests.js
deleted file mode 100644
index bee78ab..0000000
--- a/test/integration/test/cat.integration.tests.js
+++ /dev/null
@@ -1,46 +0,0 @@
-const assert = require('assert');
-const util = require('util');
-
-const exec = util.promisify(require('child_process').exec);
-
-const {reset_env,setup_env} = require('./utils.js');
-
-describe('cat integration tests', () => {
-
-	/*
-	 * This file should contain tests to test cat functionality
-	 */
-
-	beforeEach(async() => {
-		await reset_env();
-		await setup_env();
-		await exec('git ex add hello.txt',{cwd:"/home/node/working"});
-	});
-
-	it('should cat successfully', async() => {
-	 	await assert.doesNotReject(async() => {
-	 		const res = await exec('git ex cat hello.txt',{cwd:"/home/node/working"});
-	 		assert.deepStrictEqual(res,{stdout:'hello\n',stderr:''});
-		});
-	});
-
-	it(`should fail when given a file which doesn't exist`, async() => {
-		await assert.rejects(async() => await exec('git ex cat -b extra hello1.txt',{cwd:"/home/node/working"}));
-	});
-
-	it(`should fail when given a file which doesn't exist on the given branch`, async() => {
-		await assert.rejects(async() => await exec('git ex cat -b notarealbranch hello1.txt',{cwd:"/home/node/working"}));
-	});
-
-	it('should cat successfully on the current branch', async() => {
-	 	await assert.doesNotReject(async() => {
-	 		const res = await exec('git ex cat -b master test.txt',{cwd:"/home/node/working"});
-	 		assert.deepStrictEqual(res,{stdout:'test\n',stderr:''});
-		});
-	});
-
-	after(async() => {
-		await reset_env();
-	});
-
-});
\ No newline at end of file
diff --git a/test/integration/test/edit.integration.tests.js b/test/integration/test/edit.integration.tests.js
deleted file mode 100644
index d27b9d4..0000000
--- a/test/integration/test/edit.integration.tests.js
+++ /dev/null
@@ -1,43 +0,0 @@
-const assert = require('assert');
-const util = require('util');
-
-const exec = util.promisify(require('child_process').exec);
-
-const {reset_env,setup_env} = require('./utils.js');
-
-describe('edit integration tests', () => {
-
-	/*
-	 * This file should contain tests to test the full edit functionality,
-	 * from parsing command line options and their interactions with editting files.
-	 * Should also test behavior of edit which depends on state.
-	 */
-
-	beforeEach(async() => {
-		await reset_env();
-		await setup_env();
-		await exec('git ex add hello.txt',{cwd:"/home/node/working"});
-	});
-
-	it('should succeed when editting a new file', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex edit hello.txt',{cwd:"/home/node/working"});
-			assert.deepStrictEqual(res,{stdout:'hello.txt saved\n',stderr:''});
-		});
-	});
-
-	it('should delete temporary file after editting', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex edit -v hello.txt',{cwd:"/home/node/working"});
-			const index = res.stdout.indexOf("temporary file ");
-			assert(index>-1);
-			const tmp_filename = res.stdout.substr(index+15,11);
-			await assert.rejects(async() => fs_stat(tmp_filename));
-		});
-	});
-
-	after(async() => {
-		await reset_env();
-	});
-
-});
\ No newline at end of file
diff --git a/test/integration/test/ls.integration.tests.js b/test/integration/test/ls.integration.tests.js
deleted file mode 100644
index 7e5e2c0..0000000
--- a/test/integration/test/ls.integration.tests.js
+++ /dev/null
@@ -1,75 +0,0 @@
-const assert = require('assert');
-const util = require('util');
-
-const exec = util.promisify(require('child_process').exec);
-
-const {reset_env,setup_env} = require('./utils.js');
-
-describe('ls integration tests', () => {
-
-	/*
-	 * This file should contain tests to test ls functionality.
-	 */
-
-	beforeEach(async() => {
-		await reset_env();
-		await setup_env();
-		await exec('git ex add hello.txt',{cwd:"/home/node/working"});
-		await exec('git ex add hello1.txt',{cwd:"/home/node/working"});
-		await exec('mkdir test',{cwd:"/home/node/working"});
-		await exec('git ex add test/hello.txt',{cwd:"/home/node/working"});
-		await exec('mkdir -p test2/test',{cwd:"/home/node/working"});
-		await exec('git ex add test2/test/hello.txt',{cwd:"/home/node/working"});
-	});
-
-	it('should ls successfully', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex ls --long',{cwd:"/home/node/working"});
-
-			let expected = '100644 blob ce013625030ba8dba906f756967f9e9ca394464a\thello.txt\n';
-			expected += '100644 blob ce013625030ba8dba906f756967f9e9ca394464a\thello1.txt\n';
-			expected += '100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest/hello.txt\n';
-			expected += '100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest2/test/hello.txt\n';
-
-			assert.deepStrictEqual(res,{stdout:expected,stderr:''});
-		});
-	});
-
-	it('should ls (only names) successfully', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex ls',{cwd:"/home/node/working"});
-
-			let expected = 'hello.txt\n';
-			expected += 'hello1.txt\n';
-			expected += 'test/hello.txt\n';
-			expected += 'test2/test/hello.txt\n';
-			assert.deepStrictEqual(res,{stdout:expected,stderr:''});
-		});
-	});
-
-	it('should ls inside a sub-directory successfully', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex ls --long',{cwd:"/home/node/working/test"});
-
-			const expected = '100644 blob ce013625030ba8dba906f756967f9e9ca394464a\thello.txt\n';
-			assert.deepStrictEqual(res,{stdout:expected,stderr:''});
-		});
-	});
-
-	it('should ls properly when not given any arguments', async() => {
-		await assert.doesNotReject(async() => {
-			const res = await exec('git ex',{cwd:"/home/node/working"});
-
-			let expected = 'hello.txt\n';
-			expected += 'hello1.txt\n';
-			expected += 'test/hello.txt\n';
-			expected += 'test2/test/hello.txt\n';
-			assert.deepStrictEqual(res,{stdout:expected,stderr:''});
-		});
-	});
-
-	after(async() => {
-		await reset_env();
-	});
-
-});
\ No newline at end of file
diff --git a/test/integration/test/utils.js b/test/integration/test/utils.js
deleted file mode 100644
index b4ae39c..0000000
--- a/test/integration/test/utils.js
+++ /dev/null
@@ -1,25 +0,0 @@
-const assert = require('assert');
-const util = require('util');
-
-const exec = util.promisify(require('child_process').exec);
-
-const workdir = "working";
-
-const reset_env = async() => {
-	await assert.doesNotReject(async() => await exec(`rm -rf ${workdir}`,{cwd:"/home/node/"}));
-};
-
-const setup_env = async() => {
-	await assert.doesNotReject(async() => await exec(`git init ${workdir}`,{cwd:"/home/node/"}));
-	await assert.doesNotReject(async() => await exec('git config --local user.email "test@test.com"',{cwd:"/home/node/working"}));
-	await assert.doesNotReject(async() => await exec('git config --local user.name "test"',{cwd:"/home/node/working"}));
-	await assert.doesNotReject(async() => await exec(`git config --local core.editor "sh -c 'echo \\"hello\\" >> \\"\\$0\\"'"`,{cwd:"/home/node/working"}));
-	await assert.doesNotReject(async() => await exec(`echo "test" > test.txt`,{cwd:"/home/node/working"}));
-	await assert.doesNotReject(async() => await exec(`git add -A`,{cwd:"/home/node/working"}));
-	await assert.doesNotReject(async() => await exec(`git commit -a -m "..."`,{cwd:"/home/node/working"}));
-};
-
-module.exports = {
-	reset_env,
-	setup_env
-};
\ No newline at end of file
diff --git a/test/ls.tests.sh b/test/ls.tests.sh
new file mode 100755
index 0000000..7c58027
--- /dev/null
+++ b/test/ls.tests.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+BRANCH="master"
+LOG_LEVEL=info
+
+ls > result 2>&1
+EXPECTED=$'hi/test/nope/what/test3.txt\ntest.txt\ntest2.txt'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+LONG_OUTPUT=true
+ls > result 2>&1
+EXPECTED=$'100644 blob c8ced6bb17c2965c058f5cdb5677cb8cd9091f9c\thi/test/nope/what/test3.txt\n100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest.txt\n100644 blob a8453014c7d0581a0d904792f009f1ad7ff477a1\ttest2.txt'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+ls test.txt > result 2>&1
+EXPECTED=$'100644 blob ce013625030ba8dba906f756967f9e9ca394464a\ttest.txt'
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+test_succeeded
diff --git a/test/parse_arguments.tests.sh b/test/parse_arguments.tests.sh
new file mode 100755
index 0000000..275ca1b
--- /dev/null
+++ b/test/parse_arguments.tests.sh
@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+set +e
+(parse_arguments "--notarealoption" > result 2>&1)
+if [[ $? -ne 1 ]]; then
+	test_failed
+fi
+
+EXPECTED=$'./parse_arguments.tests.sh: illegal option -- -\n'
+EXPECTED+="$USAGE"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+(parse_arguments --branch > result 2>&1)
+if [[ $? -ne 1 ]]; then
+	test_failed
+fi
+
+EXPECTED=$'./parse_arguments.tests.sh: option requires an argument -- b\n'
+EXPECTED+="$USAGE"
+RESULT=$(<result)
+assert "$EXPECTED" "$RESULT"
+
+set -e
+
+parse_arguments --editor test > result 2>&1
+assert "test" "$EDITOR"
+
+parse_arguments --long > result 2>&1
+assert "true" "$LONG_OUTPUT"
+
+parse_arguments --branch test --editor NOPE --template what huh? arg1 arg2 > result 2>&1
+assert "test" "$BRANCH"
+assert "NOPE" "$EDITOR"
+assert "what" "$TEMPLATE"
+assert "huh?" "$UTILITY"
+assert "arg1 arg2" "$POSITIONAL_ARGUMENTS"
+
+test_succeeded
diff --git a/test/setup.sh b/test/setup.sh
new file mode 100755
index 0000000..1b41925
--- /dev/null
+++ b/test/setup.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+TEST_DIR=".testdir"
+
+source source.sh
+
+set +e
+(usage > temp)
+USAGE=$(<temp)
+rm -f temp
+set -e
+
+clean_env() {
+	cd ..
+	rm -rf "$TEST_DIR"
+}
+
+setup_env() {
+	mkdir "$TEST_DIR"
+	cd "$TEST_DIR"
+	git init
+	echo "hello" > test.txt
+	echo "laskdjfalskdfj" > test2.txt
+	mkdir -p "hi/test/nope/what"
+	echo "alskdjflaksdjflkasjdflkasjdklasjdlkfjd" > "hi/test/nope/what/test3.txt"
+	git config user.email "git-extra-test@infiniteadaptability.org"
+	git config user.name "git-extra-test"
+	git add test.txt
+	git add test2.txt
+	git add hi/test/nope/what/test3.txt
+	git commit -m "initial commit"
+} > /dev/null 2>&1
+
+reset_env() {
+	clean_env
+	setup_env
+}
+
+assert() {
+	if [[ "$1" != "$2" ]]; then
+		echo -e "Expected:\n$1\nResult:\n$2"
+		echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]} failed"
+		exit 1
+	fi
+}
+
+test_failed() {
+	echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]} failed"
+	exit 1
+}
+
+test_succeeded() {
+	echo "${BASH_SOURCE[1]} succeeded"
+	clean_env
+}
diff --git a/test/unit/Makefile.am b/test/unit/Makefile.am
deleted file mode 100644
index 6fdee03..0000000
--- a/test/unit/Makefile.am
+++ /dev/null
@@ -1,100 +0,0 @@
-TEMPLATE_DIR=$(builddir)/
-
-AM_CPPFLAGS = \
-	-I$(top_builddir)/include/ \
-	-I$(top_builddir)/test/unit/ \
-	-I$(top_srcdir)/include/ \
-	-I$(top_srcdir)/test/unit/ \
-	-DTEMPLATE_DIR='"$(TEMPLATE_DIR)"'
-
-EXTRA_DIST = \
-	add.tests.h \
-	branch.tests.h \
-	cat.tests.h \
-	commit.tests.h \
-	default.tests.h \
-	editor.tests.h \
-	edit.tests.h \
-	hash.tests.h \
-	templ.tests.h \
-	test_utils.h
-
-check_PROGRAMS = add.tests branch.tests cat.tests commit.tests default.tests edit.tests editor.tests hash.tests templ.tests
-TESTS = $(check_PROGRAMS)
-
-if ENABLE_MEMCHECK
-LOG_COMPILER = $(VALGRIND)
-AM_LOG_FLAGS = --leak-check=full -v
-endif
-
-common_SOURCES = test_utils.c
-
-TEST_SRC_DIR = $(top_srcdir)/src
-
-common_SOURCES += \
-	$(TEST_SRC_DIR)/default.c \
-	$(TEST_SRC_DIR)/exec.c \
-	$(TEST_SRC_DIR)/git.c \
-	$(TEST_SRC_DIR)/log.c
-
-add_tests_SOURCES = \
-	$(common_SOURCES) \
-	add.tests.c \
-	$(TEST_SRC_DIR)/add.c \
-	$(TEST_SRC_DIR)/branch.c \
-	$(TEST_SRC_DIR)/commit.c \
-	$(TEST_SRC_DIR)/editor.c \
-	$(TEST_SRC_DIR)/hash.c \
-	$(TEST_SRC_DIR)/prepend.c \
-	$(TEST_SRC_DIR)/templ.c
-
-branch_tests_SOURCES = \
-	$(common_SOURCES) \
-	branch.tests.c \
-	$(TEST_SRC_DIR)/branch.c \
-	$(TEST_SRC_DIR)/prepend.c
-
-cat_tests_SOURCES = \
-	$(common_SOURCES) \
-	cat.tests.c \
-	$(TEST_SRC_DIR)/cat.c
-
-commit_tests_SOURCES = \
-	$(common_SOURCES) \
-	commit.tests.c \
-	$(TEST_SRC_DIR)/branch.c \
-	$(TEST_SRC_DIR)/commit.c \
-	$(TEST_SRC_DIR)/prepend.c
-
-default_tests_SOURCES = \
-	$(common_SOURCES) \
-	default.tests.c
-
-edit_tests_SOURCES = \
-	$(common_SOURCES) \
-	edit.tests.c \
-	$(TEST_SRC_DIR)/add.c \
-	$(TEST_SRC_DIR)/branch.c \
-	$(TEST_SRC_DIR)/cat.c \
-	$(TEST_SRC_DIR)/commit.c \
-	$(TEST_SRC_DIR)/edit.c \
-	$(TEST_SRC_DIR)/editor.c \
-	$(TEST_SRC_DIR)/hash.c \
-	$(TEST_SRC_DIR)/prepend.c \
-	$(TEST_SRC_DIR)/templ.c
-
-editor_tests_SOURCES = \
-	$(common_SOURCES) \
-	editor.tests.c \
-	$(TEST_SRC_DIR)/editor.c \
-	$(TEST_SRC_DIR)/hash.c
-
-hash_tests_SOURCES = \
-	$(common_SOURCES) \
-	hash.tests.c \
-	$(TEST_SRC_DIR)/hash.c
-
-templ_tests_SOURCES = \
-	$(common_SOURCES) \
-	templ.tests.c \
-	$(TEST_SRC_DIR)/templ.c
\ No newline at end of file
diff --git a/test/unit/add.tests.c b/test/unit/add.tests.c
deleted file mode 100644
index 09d0402..0000000
--- a/test/unit/add.tests.c
+++ /dev/null
@@ -1,18 +0,0 @@
-#include<add.tests.h>
-
-int main() {
-	setup_env();
-
-	add_basic_test();
-
-	clean_env();
-}
-
-void add_basic_test() {
-	defaults();
-	
-	assert(EXIT_FAILURE==add(NULL));
-	assert(EXIT_SUCCESS==add("test.txt"));
-	assert(EXIT_FAILURE==add("test.txt"));
-	assert(EXIT_SUCCESS==add("test2.txt"));
-}
\ No newline at end of file
diff --git a/test/unit/add.tests.h b/test/unit/add.tests.h
deleted file mode 100644
index 5aa9ba0..0000000
--- a/test/unit/add.tests.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __ADD_TESTS_H_
-#define __ADD_TESTS_H_
-
-#include<test_utils.h>
-
-#include<add.h>
-#include<default.h>
-
-int main();
-void add_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/branch.tests.c b/test/unit/branch.tests.c
deleted file mode 100644
index 8f5d695..0000000
--- a/test/unit/branch.tests.c
+++ /dev/null
@@ -1,44 +0,0 @@
-#include<branch.tests.h>
-
-int main() {
-	setup_env();
-
-	branch_create_basic_test();
-	reset_env();
-
-	branch_exists_basic_test();
-	reset_env();
-
-	branch_basic_test();
-	branch_reset_basic_test();
-
-	clean_env();
-}
-
-void branch_basic_test() {
-	global_opts.branch = "extra";
-
-	char got[HASH_BUF_LENGTH];
-
-	assert(1==branch(got,HASH_BUF_LENGTH));
-}
-
-void branch_create_basic_test() {
-	global_opts.branch = NULL;
-	assert(branch_create()<0);
-
-	global_opts.branch = "test";
-	assert(branch_create()==1);
-}
-
-void branch_exists_basic_test() {
-	global_opts.branch = "master";
-	assert(branch_exists()==1);
-
-	global_opts.branch = "notarealbranch";
-	assert(branch_exists()==0);
-}
-
-void branch_reset_basic_test() {
-	assert(branch_reset()==1);
-}
\ No newline at end of file
diff --git a/test/unit/branch.tests.h b/test/unit/branch.tests.h
deleted file mode 100644
index 04d3c14..0000000
--- a/test/unit/branch.tests.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef __BRANCH_TESTS_H_
-#define __BRANCH_TESTS_H_
-
-#include<test_utils.h>
-
-#include<branch.h>
-
-int main();
-void branch_basic_test();
-void branch_create_basic_test();
-void branch_exists_basic_test();
-void branch_reset_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/cat.tests.c b/test/unit/cat.tests.c
deleted file mode 100644
index 9bd542c..0000000
--- a/test/unit/cat.tests.c
+++ /dev/null
@@ -1,19 +0,0 @@
-#include<cat.tests.h>
-
-int main() {
-	setup_env();
-
-	cat_basic_test();
-
-	clean_env();
-}
-
-void cat_basic_test() {
-	assert(EXIT_FAILURE==cat(NULL));
-
-	global_opts.branch = "extra";
-	assert(EXIT_FAILURE==cat("test.txt"));
-
-	global_opts.branch = "master";
-	assert(EXIT_SUCCESS==cat("test.txt"));
-}
\ No newline at end of file
diff --git a/test/unit/cat.tests.h b/test/unit/cat.tests.h
deleted file mode 100644
index d1dbb20..0000000
--- a/test/unit/cat.tests.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __CAT_TESTS_H_
-#define __CAT_TESTS_H_
-
-#include<test_utils.h>
-
-#include<cat.h>
-
-int main();
-void cat_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/commit.tests.c b/test/unit/commit.tests.c
deleted file mode 100644
index a6e15c1..0000000
--- a/test/unit/commit.tests.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include<commit.tests.h>
-
-int main() {
-	setup_env();
-
-	commit_basic_test();
-
-	clean_env();
-}
-
-void commit_basic_test() {
-	assert(0==system("echo 'test2' > test2.txt"));
-
-	global_opts.branch = "extra";
-
-	char file_hash[HASH_BUF_LENGTH];
-	memset(file_hash,0,HASH_BUF_LENGTH);
-
-	char **argv;
-	int i;
-	
-	assert(1==git_hash_object("test2.txt",HASH_OBJECT_ADD_TO_INDEX,file_hash,HASH_BUF_LENGTH));
-	
-	char c = file_hash[0];
-	file_hash[0]++;
-	assert(commit(file_hash,HASH_BUF_LENGTH,"hahahah")<0);
-
-	file_hash[0] = c;
-	assert(1==commit(file_hash,HASH_BUF_LENGTH,"hahahah"));
-}
\ No newline at end of file
diff --git a/test/unit/commit.tests.h b/test/unit/commit.tests.h
deleted file mode 100644
index 2f683cf..0000000
--- a/test/unit/commit.tests.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __COMMIT_TESTS_H_
-#define __COMMIT_TESTS_H_
-
-#include<test_utils.h>
-
-#include<commit.h>
-
-int main();
-void commit_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/default.tests.c b/test/unit/default.tests.c
deleted file mode 100644
index 93e326c..0000000
--- a/test/unit/default.tests.c
+++ /dev/null
@@ -1,26 +0,0 @@
-#include<default.tests.h>
-
-int main() {
-	setup_env();
-
-	default_basic_test();
-	default_editor_basic_test();
-
-	clean_env();
-}
-
-void default_basic_test() {
-	defaults();
-
-	assert(0==strcmp(global_opts.branch,"extra"));
-	assert(0==strcmp(global_opts.editor,"sh -c 'echo \"hello\" >> \"$0\"'"));
-	assert(NULL==global_opts.path_prefix);
-}
-
-void default_editor_basic_test() {
-	assert(0==setenv("EDITOR","hahahahah",1));
-
-	assert(default_editor()==1);
-
-	assert(0==strcmp(global_opts.editor,"hahahahah"));
-}
\ No newline at end of file
diff --git a/test/unit/default.tests.h b/test/unit/default.tests.h
deleted file mode 100644
index ea22576..0000000
--- a/test/unit/default.tests.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef __DEFAULT_TESTS_H_
-#define __DEFAULT_TESTS_H_
-
-#include<stdlib.h>
-
-#include<test_utils.h>
-
-#include<default.h>
-
-int main();
-void default_basic_test();
-void default_editor_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/edit.tests.c b/test/unit/edit.tests.c
deleted file mode 100644
index 186266c..0000000
--- a/test/unit/edit.tests.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include<edit.tests.h>
-
-int main() {
-	setup_env();
-
-	edit_basic_test();
-
-	clean_env();
-}
-
-void edit_basic_test() {
-	defaults();
-
-	assert(EXIT_FAILURE==edit(NULL));
-	assert(EXIT_FAILURE==edit("test.txt"));
-
-	assert(EXIT_SUCCESS==add("test.txt"));
-	assert(EXIT_SUCCESS==edit("test.txt"));
-
-	assert(EXIT_FAILURE==edit("test2.txt"));
-}
\ No newline at end of file
diff --git a/test/unit/edit.tests.h b/test/unit/edit.tests.h
deleted file mode 100644
index 2328a80..0000000
--- a/test/unit/edit.tests.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __EDIT_TESTS_H_
-#define __EDIT_TESTS_H_
-
-#include<test_utils.h>
-
-#include<default.h>
-#include<edit.h>
-
-int main();
-void edit_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/editor.tests.c b/test/unit/editor.tests.c
deleted file mode 100644
index 936a125..0000000
--- a/test/unit/editor.tests.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include<editor.tests.h>
-
-int main() {
-	setup_env();
-
-	editor_basic_test();
-
-	clean_env();
-}
-
-void editor_basic_test() {
-	defaults();
-
-	assert(editor(NULL)<0);
-	assert(editor("filewhichdoesntexist.txt")<0);
-	
-	assert(editor("test.txt")>0);
-
-	global_opts.editor = "sh -c 'echo \"$0\"'";
-	assert(editor("test.txt")<0);
-}
\ No newline at end of file
diff --git a/test/unit/editor.tests.h b/test/unit/editor.tests.h
deleted file mode 100644
index c979df9..0000000
--- a/test/unit/editor.tests.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __EDITOR_TESTS_H_
-#define __EDITOR_TESTS_H_
-
-#include<test_utils.h>
-
-#include<default.h>
-#include<editor.h>
-
-int main();
-void editor_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/hash.tests.c b/test/unit/hash.tests.c
deleted file mode 100644
index 788e45a..0000000
--- a/test/unit/hash.tests.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include<hash.tests.h>
-
-int main() {
-	setup_env();
-
-	hash_basic_test();
-
-	clean_env();
-}
-
-void hash_basic_test() {
-	char expected[HASH_BUF_LENGTH] = "9daeafb9864cf43055ae93beb0afd6c7d144bfa4";
-	char got[HASH_BUF_LENGTH];
-
-	memset(got,0,HASH_BUF_LENGTH);
-
-	assert(hash("test.txt",got,HASH_BUF_LENGTH)==1);
-
-	assert(memcmp(expected,got,HASH_BUF_LENGTH)==0);
-}
\ No newline at end of file
diff --git a/test/unit/hash.tests.h b/test/unit/hash.tests.h
deleted file mode 100644
index 710d281..0000000
--- a/test/unit/hash.tests.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __HASH_TESTS_H_
-#define __HASH_TESTS_H_
-
-#include<test_utils.h>
-
-#include<hash.h>
-
-int main();
-void hash_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/templ.tests.c b/test/unit/templ.tests.c
deleted file mode 100644
index cc69a74..0000000
--- a/test/unit/templ.tests.c
+++ /dev/null
@@ -1,25 +0,0 @@
-#include<templ.tests.h>
-
-int main() {
-	setup_env();
-
-	template_basic_test();
-
-	clean_env();
-}
-
-void template_basic_test() {
-	char filename[] = "/tmp/XXXXXX";
-	int fd = mkstemp(filename);
-
-	assert(fd>=0);
-
-	global_opts.template = NULL;
-	assert(template(fd)==0);
-
-	global_opts.template = "notavalidtemplatename";
-	assert(template(fd)==0);
-
-	global_opts.template = "test.template";
-	assert(template(fd)==1);
-}
\ No newline at end of file
diff --git a/test/unit/templ.tests.h b/test/unit/templ.tests.h
deleted file mode 100644
index c502065..0000000
--- a/test/unit/templ.tests.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __TEMPL_TESTS_H_
-#define __TEMPL_TESTS_H_
-
-#include<test_utils.h>
-
-#include<templ.h>
-
-int main();
-void template_basic_test();
-
-#endif
\ No newline at end of file
diff --git a/test/unit/test_utils.c b/test/unit/test_utils.c
deleted file mode 100644
index 1cf07a8..0000000
--- a/test/unit/test_utils.c
+++ /dev/null
@@ -1,29 +0,0 @@
-#include<test_utils.h>
-
-void clean_env() {
-	assert(chdir("..")==0);
-	assert(0==system("rm -rf working"));
-}
-
-void reset_env() {
-	clean_env();
-	setup_env();
-}
-
-void setup_env() {
-	// remove old test directory (if previous test failed)
-	assert(0==system("rm -rf working"));
-	
-	assert(0==system("git init working"));
-	
-	assert(chdir("working")==0);
-	
-	assert(0==system("git config --local user.email \"test@test.com\""));
-	assert(0==system("git config --local user.name \"test@test.com\""));
-	assert(0==system("git config --local core.editor \"sh -c 'echo \\\"hello\\\" >> \\\"\\$0\\\"'\""));
-	
-	assert(0==system("echo \"template\n\n\nhahaha\" > test.template"));
-	assert(0==system("echo \"test\" > test.txt"));
-	assert(0==system("git add -A"));
-	assert(0==system("git commit -a -m \"...\""));
-}
\ No newline at end of file
diff --git a/test/unit/test_utils.h b/test/unit/test_utils.h
deleted file mode 100644
index 5011cc8..0000000
--- a/test/unit/test_utils.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __TEST_UTILS_H_
-#define __TEST_UTILS_H_
-
-#include<assert.h>
-#include<stdlib.h>
-#include<unistd.h>
-
-void clean_env();
-void setup_env();
-void reset_env();
-
-#endif
\ No newline at end of file
diff --git a/test/usage.tests.sh b/test/usage.tests.sh
new file mode 100755
index 0000000..6834ec1
--- /dev/null
+++ b/test/usage.tests.sh
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# this command will fail if not executed in test/ directory
+source setup.sh
+
+setup_env
+
+set +e
+(usage > result)
+if [[ $? -ne 1 ]]; then
+	test_failed
+fi
+set -e
+
+EXPECTED=$'Usage:\n\n\tgit extra [options] [add|cat|edit|ls] [path]\n\nOptions:\n\t--branch, -b <branch>\n\t--editor, -e <editor>\n\t--long, -l\n\t--message, -m <message>\n\t--quiet, -q\n\t--template, -t <template>\n\t--verbose, -v'
+RESULT=$(<result)
+
+if [[ "$EXPECTED" != "$RESULT" ]]; then
+	test_failed
+fi
+
+test_succeeded
-- 
2.39.5