pre-commit.hook

#!/bin/bash
#
# The hook should exit with non-zero status after issuing
# an appropriate message if it wants to stop the commit.

# Strictly disallow uninitialized Variables
set -u
# Exit if a single command breaks and its failure is not handled accordingly
set -e

if git rev-parse --verify HEAD >/dev/null 2>&1; then
	against=HEAD
else
	# Initial commit: diff against an empty tree object
	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

# If there are whitespace errors, print the offending file names and fail.
git diff-index --check --cached $against -- 1>&2 || echo -e "\033[0;31mThis commit contains whitespace issues!\033[0m"

# Usefull hooks for the Arch User Repository or Arch Build System

# Fix environment of githooks
unset GIT_DIR

# Allow to read user input below, assigns stdin to keyboard
exec < /dev/tty

# Iterate through folders with a PKGBUILD
# shellcheck disable=SC2046
for path in $(dirname $(git diff --name-only --cached) 2>/dev/null | sort -u); do
	if [[ -f "${path}/PKGBUILD" ]]; then
		echo -e "\033[1;32m==>\e[39;1m Entering ${path}...\e[0m"

		# Ask whether updating the checksums is desired
		updpkgsums_cmd="updpkgsums"
		echo -en "\e[34;1m  ->\e[39;1m Do you want to update the checksums using '${updpkgsums_cmd}'? [Y/n] \e[0m"
		read -rn1 user_input
		echo
		if [[ ${user_input} =~ (Y|y) ]]; then
			(cd "${path}" && ${updpkgsums_cmd})

			# Update tracked PKGBUILD
			git add -u "${path}/PKGBUILD" 1> /dev/null
		fi
		unset user_input

		# Ask whether a rebuild is desired
		makepkg_cmd="makepkg -sfc"
		echo -en "\e[34;1m  ->\e[39;1m Do you want to rebuild the package using '${makepkg_cmd}'? [Y/n] \e[0m"
		read -rn1 user_input
		echo
		if [[ ${user_input} =~ (Y|y) ]]; then
			cd "${path}" || exit 1

			echo

			if ! ${makepkg_cmd}; then
				# Ask to abort the commit in case the build fails
				echo -en "\n\e[34;1m  ->\e[39;1m A failure occured while building the package. Do you want to abort this commit? [Y/n] \e[0m"
				read -rn1 user_input_two
				echo
				if [[ ${user_input_two} =~ (Y|y) ]]; then
					exit 2
				fi
			else
				echo
			fi

			cd - 1>/dev/null
		fi
		unset user_input

		echo -e "\e[34;1m  ->\e[39;1m Generating .SRCINFO...\e[0m"
		(cd "${path}" && makepkg --printsrcinfo > .SRCINFO)
		echo -e "\e[34;1m  ->\e[39;1m Checking PKGBUILD with namcap...\033[0m"
		[[ ! -x "/usr/bin/namcap" ]] && echo -e "\e[0;31m  ->\e[39;1m Unable to execute /usr/bin/namcap... aborting commit\e[0m" && exit 1
		(cd "${path}" && namcap PKGBUILD)

		# Add the .SRCINFO file if it is not tracked already
		if ! git ls-files "${path}/.SRCINFO" --error-unmatch &> /dev/null; then
			git add "${path}/.SRCINFO"
			echo -e "\e[34;1m  ->\e[39;1m Adding .SRCINFO to git tree...\033[0m"
		fi

		git add -u "${path}/.SRCINFO" 1>/dev/null
	fi
done