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#!/usr/bin/env bash
# ts-git-hook launcher (installed at .git/hooks/ts-git-hook).
#
# Written by misc/install-git-hooks.go from the canonical copy embedded
# in tailscale.com/misc/git_hook/githook. On every invocation it:
#
# 1. Compares misc/git_hook/HOOK_VERSION against the binary's version.
# 2. If stale or missing: rebuilds .git/hooks/ts-git-hook-bin and runs
# `ts-git-hook-bin install` to refresh the launcher and per-hook
# wrappers.
# 3. Execs the binary with the hook's args.
#
# Any change to this file or the binary must bump HOOK_VERSION.
set -euo pipefail
REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null)" || {
echo "git-hook: not in a git repo" >&2
exit 1
}
HOOK_DIR="$(git -C "$REPO_ROOT" rev-parse --git-path hooks)"
case "$HOOK_DIR" in
/*) ;;
*) HOOK_DIR="$REPO_ROOT/$HOOK_DIR" ;;
esac
# Windows (Git for Windows / MSYS2) needs .exe suffixes.
EXE=""
case "$(uname -s)" in MINGW* | MSYS* | CYGWIN*) EXE=".exe" ;; esac
BINARY="$HOOK_DIR/ts-git-hook-bin$EXE"
WANT="$(cat "$REPO_ROOT/misc/git_hook/HOOK_VERSION" 2>/dev/null || echo 0)"
HAVE="$("$BINARY" version 2>/dev/null || echo none)"
if [ "$WANT" != "$HAVE" ]; then
GO="$REPO_ROOT/tool/go$EXE"
if [ ! -x "$GO" ]; then GO=go; fi
echo "git-hook: rebuilding ts-git-hook-bin..." >&2
(cd "$REPO_ROOT" && GOWORK=off "$GO" build -o "$BINARY" ./misc/git_hook) || {
echo "git-hook: rebuild failed, run: ./tool/go run ./misc/install-git-hooks.go" >&2
exit 1
}
"$BINARY" install
fi
exec "$BINARY" "$@"
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