#!/bin/bash

# TO "INSTALL"
#
# Put this file in your ~/.githooks directory (or similar)
# Make sure the filename is 'pre-commit'
# Then add the following to your ~/.gitconfig, uncommented:
#
# [core]
#   hooksPath = ~/.githooks


# This hook is called by "git commit" with no arguments. It should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.

branch="$(git rev-parse --abbrev-ref HEAD)"

if [ "$branch" = "master" ]; then
  echo "You can't commit directly to master branch"
  exit 1
fi

if test -f "$(git rev-parse --show-toplevel)/.git/MERGE_HEAD"; then
    echo "Skipping pre-commit check for merge commit"
    exit 0
fi

# Stash any changes not staged for commit
STASH_NAME=pre-commit-$(date +%s)
git stash save -q --keep-index $STASH_NAME

# Returns to original pre-stash state, if necessary
pop() {
    STASH_NUM=$(git stash list | grep $STASH_NAME | sed -re 's/stash@\{(.*)\}.*/\1/')

    # Only necessary if anything was stashed
    if [ -n "$STASH_NUM" ]; then
        git stash pop -q stash@{$STASH_NUM}
    fi
}

build() {
    dir="$(echo $PWD | sed 's@/home/[^/]\+/@~/@')"
    make test &> /dev/null
    result="$?"
    if [[ "$result" == 2 ]]; then
        echo
    elif [[ "$result" != 0 ]]; then
        notify-send "Tests failed during commit in $dir"
    else
        notify-send "Tests passed in $dir"
    fi
    pop
}

~/.githooks/pre-commit-build.sh "$STASH_NAME"

# # Redirect output to stderr.
# exec 1>&2
# 
# # If the Makefile does not contain the 'test' command, `make test` will exit with '2'
# # This is not considered a test failure!
# if ! (make test || test $? = 2); then
#     cat <<\EOF
# Error: `make test` exists in the Makefile, but failed
# 
# If you know what you are doing you can skip this check using:
# 
#   git commit --no-verify
# EOF
#     pop
#     exit 1
# fi
# 
# pop