add scripts to setup git hooks

2 files changed, 48 insertions, 0 deletions

diff --git a/scripts/pre-commit.sh b/scripts/pre-commit.sh
new file mode 100755
index 0000000..fd1f7dd
--- /dev/null
+++ b/scripts/pre-commit.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o pipefail
+shopt -s inherit_errexit lastpipe
+
+if ! command -v git-clang-format &> /dev/null; then
+	echo 'Please make sure git-clang-format is available.' >&2
+	exit 1
+fi
+
+output="$( git clang-format --style file --diff )" || true
+
+ok1='no modified files to format'
+ok2='clang-format did not modify any files'
+
+if [ "$output" != "$ok1" ] && [ "$output" != "$ok2" ]; then
+	echo "$output"
+	echo
+	echo 'clang-format required some formatting fixes.'
+	echo 'Please stage your changes, run `git clang-format`, review the formatting fixes, and commit.'
+	exit 1
+fi
diff --git a/scripts/setup-hooks.sh b/scripts/setup-hooks.sh
new file mode 100755
index 0000000..dad7e79
--- /dev/null
+++ b/scripts/setup-hooks.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o pipefail
+shopt -s inherit_errexit lastpipe
+
+script_dir="$( dirname -- "${BASH_SOURCE[0]}" )"
+script_dir="$( cd -- "$script_dir" && pwd )"
+
+setup_clang_format_hook() {
+	local gitdir
+	gitdir="$( git rev-parse --git-dir )"
+	local hooks_dir
+	hooks_dir="$gitdir/hooks"
+
+	local symlink_dest
+	symlink_dest="$( realpath "--relative-to=$hooks_dir" -- "$script_dir/pre-commit.sh" )"
+
+	ln -fs -- "$symlink_dest" "$hooks_dir/pre-commit"
+}
+
+main() {
+	cd -- "$script_dir"
+	setup_clang_format_hook
+}
+
+main