/
hook.go
157 lines (139 loc) · 3.64 KB
/
hook.go
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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"io/ioutil"
"os"
"path/filepath"
"runtime"
)
var hookFile = filepath.FromSlash(".git/hooks/commit-msg")
func installHook() {
filename := filepath.Join(repoRoot(), hookFile)
_, err := os.Stat(filename)
if err == nil {
return
}
if !os.IsNotExist(err) {
dief("error checking for hook file: %v", err)
}
verbosef("Presubmit hook to add Change-Id to commit messages is missing.")
verbosef("Automatically creating it at %v.", filename)
hookContent := []byte(commitMsgHook)
if err := ioutil.WriteFile(filename, hookContent, 0700); err != nil {
dief("error writing hook file: %v", err)
}
}
func repoRoot() string {
dir, err := os.Getwd()
if err != nil {
dief("could not get current directory: %v", err)
}
rootlen := 1
if runtime.GOOS == "windows" {
rootlen += len(filepath.VolumeName(dir))
}
for {
if _, err := os.Stat(filepath.Join(dir, ".git")); err == nil {
return dir
}
if len(dir) == rootlen && dir[rootlen-1] == filepath.Separator {
dief("git root not found. Rerun from within the Git tree.")
}
dir = filepath.Dir(dir)
}
}
var commitMsgHook = `#!/bin/sh
# From Gerrit Code Review 2.2.1
#
# Part of Gerrit Code Review (http://code.google.com/p/gerrit/)
#
# Copyright (C) 2009 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
CHANGE_ID_AFTER="Bug|Issue"
MSG="$1"
# Check for, and add if missing, a unique Change-Id
#
add_ChangeId() {
clean_message=` + "`" + `sed -e '
/^diff --git a\/.*/{
s///
q
}
/^Signed-off-by:/d
/^#/d
' "$MSG" | git stripspace` + "`" + `
if test -z "$clean_message"
then
return
fi
if grep -i '^Change-Id:' "$MSG" >/dev/null
then
return
fi
id=` + "`" + `_gen_ChangeId` + "`" + `
perl -e '
$MSG = shift;
$id = shift;
$CHANGE_ID_AFTER = shift;
undef $/;
open(I, $MSG); $_ = <I>; close I;
s|^diff --git a/.*||ms;
s|^#.*$||mg;
exit unless $_;
@message = split /\n/;
$haveFooter = 0;
$startFooter = @message;
for($line = @message - 1; $line >= 0; $line--) {
$_ = $message[$line];
if (/^[a-zA-Z0-9-]+:/ && !m,^[a-z0-9-]+://,) {
$haveFooter++;
next;
}
next if /^[ []/;
$startFooter = $line if ($haveFooter && /^\r?$/);
last;
}
@footer = @message[$startFooter+1..@message];
@message = @message[0..$startFooter];
push(@footer, "") unless @footer;
for ($line = 0; $line < @footer; $line++) {
$_ = $footer[$line];
next if /^($CHANGE_ID_AFTER):/i;
last;
}
splice(@footer, $line, 0, "Change-Id: I$id");
$_ = join("\n", @message, @footer);
open(O, ">$MSG"); print O; close O;
' "$MSG" "$id" "$CHANGE_ID_AFTER"
}
_gen_ChangeIdInput() {
echo "tree ` + "`" + `git write-tree` + "`" + `"
if parent=` + "`" + `git rev-parse HEAD^0 2>/dev/null` + "`" + `
then
echo "parent $parent"
fi
echo "author ` + "`" + `git var GIT_AUTHOR_IDENT` + "`" + `"
echo "committer ` + "`" + `git var GIT_COMMITTER_IDENT` + "`" + `"
echo
printf '%s' "$clean_message"
}
_gen_ChangeId() {
_gen_ChangeIdInput |
git hash-object -t commit --stdin
}
add_ChangeId
`