git.scottworley.com Git - rfc1751/blob

1 #! /usr/bin/env nix-shell

2 #! nix-shell -i bash -p shfmt

3 # shellcheck shell=bash

5 # Copy me to .git/hooks/pre-commit

7 set -euo pipefail

9 tmpdir=

10 cleanup_tmpdir() {

11 if [[ "$tmpdir" && -e "$tmpdir" ]];then

12 rm -rf "$tmpdir"

13 fi

15 trap cleanup_tmpdir EXIT

17 # Check out the git index (what's about to be committed) in a temporary

18 # directory & run the supplied command there.

19 in_git_index_in_tmpdir() {

20 tmpdir=$(mktemp -d)

21 [[ "$tmpdir" && -d "$tmpdir" ]]

22 start_index=$(sha256sum "${GIT_INDEX_FILE:-.git/index}")

23 git checkout-index --prefix="$tmpdir/" -a

24 pushd "$tmpdir"

25 "$@"

26 popd

27 end_index=$(sha256sum "${GIT_INDEX_FILE:-.git/index}")

28 if [[ "$start_index" != "$end_index" ]];then

29 echo "Index changed while pre-commit tests were running. Aborting!"

30 exit 1

31 fi

34 verify() {

35 nix-shell --arg lint true --run './test.sh lint'

38 in_git_index_in_tmpdir verify