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|
#!/usr/bin/env bash
# To enable this hook, move this file to ".git/hooks/post-commit"
set -euo pipefail
# utility function to display message in color (if supported)
highlight() {
tput -S << EOF
bold
setaf $1
EOF
echo "$2"
tput sgr0
}
# utility function to search for a program (in a subshell)
find_program() (
PATH="$(git rev-parse --git-path hooks):/opt/rocm-4.3.1/llvm/bin:/opt/rocm-4.3.0/llvm/bin:$PATH"
export PATH
command -v "$1" >/dev/null
)
# utility function to find the number of parents of a git commit
get_commit_parent_count() {
git log -n 1 --format=%P "$1^!" | wc --words
}
# gather commit information
commit=$(git rev-parse HEAD)
short_commit=$(git rev-parse --short "$commit")
# setup cleanup
ok=0
on_exit() {
if [ $ok -ne 1 ]; then
highlight 1 'post-commit: formatting failed'
fi
chmod +x "${BASH_SOURCE[0]}" # re-enable hook
}
trap on_exit EXIT
# check for unstaged changes
if git diff-index --quiet HEAD; then
dirty=false
else
dirty=true
fi
>&2 echo "post-commit: processing commit $short_commit"
# save workspace
if [ "$dirty" = true ]; then
>&2 echo 'post-commit: stashing uncommitted changes'
git stash push --quiet --message 'post-commit: uncommitted changes'
fi
# check if clang-format is available
declare -a format_options
if ! find_program clang-format; then
format_options+=('--no-clang-format')
>&2 highlight 3 "post-commit: clang-format not found"
fi
# apply formatting and stage changes
script_dir=$(dirname "${BASH_SOURCE[0]}")
while IFS= read -r -d '' file; do
>&2 echo "post-commit: reformatting $file"
"$script_dir/reformat-files" "${format_options[@]}" -- "$file"
git add --update -- "$file"
done < <(git diff-tree --no-commit-id --name-only -r --diff-filter=d -z HEAD)
# commit changes and restore workspace
if git diff --quiet --staged; then
>&2 echo 'post-commit: files unchanged after reformatting'
else
>&2 echo 'post-commit: amending commit with reformatted files'
chmod -x "${BASH_SOURCE[0]}" # prevent recursion
git config advice.ignoredHook false # disable warning
git commit --amend --allow-empty --no-edit --no-verify --no-post-rewrite
# warn if commit is empty
if [ "$(get_commit_parent_count HEAD)" -eq 1 ] && git diff --quiet HEAD HEAD^@; then
>&2 highlight 3 "post-commit: commit is empty"
fi
fi
# restore workspace
if [ "$dirty" = true ]; then
>&2 echo 'post-commit: restoring uncommitted changes from stash'
git stash pop --quiet
fi
ok=1
|
