dotfiles/.githooks/prepare-commit-msg
Marty Oehme ecbf8409f9
Add git hook for package comparison
When moving to commit, this hook will automatically fire and check the
current system's installed packages against those explicitly committed
to the repository. If they mismatch it will inform the user.

It will not prevent the commit, but simply add a comment at the top of
the commit messages to remind the user that something is unbalanced
between both. It would be recommended to either check the additional
package into source control, remove it from the current system, or
explicitly add it to ignored packages.
2020-02-07 22:31:41 +01:00

58 lines
1.7 KiB
Bash
Executable file

#!/usr/bin/env sh
COMMIT_MSG_FILE="$1"
COMMIT_SOURCE="$2"
pkgfileloc="$(git rev-parse --show-toplevel)/_bootstrap/packages.txt"
pkgignoreloc="$(git rev-parse --show-toplevel)/_bootstrap/packages_ignore.txt"
listgen="yay"
err() {
printf "\x1b[33mCAUTION:\x1b[0m %s\n" "$*"
exit 1
}
if [ ! -f "$pkgfileloc" ]; then
err "File not found - $pkgfileloc, can not determine package differences!"
fi
if ! type "$listgen" >/dev/null 2>&1; then
err "Yay not installed on machine, can not reliably determine package differences!"
fi
# get commited packages, remove empty lines
# and lines beginning with # to allow comments
pkgcommited=$(mktemp)
sed -e '/^[#$]/d' <"$pkgfileloc" | sort >"$pkgcommited"
# get packages on this machine
# q removes extraneous info
# e only lists explicitly installed
# tt removes those that are depended on, but NOT those optionally depended on
pkgcurrent=$(yay -Qqett | sort)
# remove those listed in package_ignore.txt
if [ -f "$pkgignoreloc" ]; then
pkgcurrent=$(echo "$pkgcurrent" | comm -23 - "$pkgignoreloc")
fi
# compare the lists, list differences
result=$(echo "$pkgcurrent" | comm -3 - "$pkgcommited")
# get files only in repo (field1), and only on machine (field2)
added=$(echo "$result" | cut -f1 | sed -e '/^$/d')
removed=$(echo "$result" | cut -s -f2)
# if we have no changes, do nothing
if [ -n "$added" ] || [ -n "$removed" ]; then
text=$(printf "\-- PACKAGE DIFFERENCES TO COMMITED LIST FOUND --\nPackages NOT YET in repo:\n%s\n\nPackages ONLY in repo:%s\n" "$added" "$removed" | sed 's/^/# /gm')
else
exit 0
fi
# prepend package changes to message
case $COMMIT_SOURCE in
"" | message, | template,)
msg=$(echo "$text" | cat - "$COMMIT_MSG_FILE")
printf "%s" "$msg" >"$COMMIT_MSG_FILE"
;;
esac