Scripts/commit-msg at main · Hoppless/Scripts · GitHub

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#!/bin/sh
# From Gerrit Code Review 3.5.0.1-1-g05e28e622e
#
# Part of Gerrit Code Review (https://www.gerritcodereview.com/)
#
# 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.

set -u

# avoid [[ which is not POSIX sh.
iftest"$#"!= 1;then
echo"$0 requires an argument."
exit 1
fi

iftest! -f "$1";then
echo"file does not exist: $1"
exit 1
fi

# Do not create a change id if requested
iftest"false" = "$(git config --bool --get gerrit.createChangeId)";then
exit 0
fi

if git rev-parse --verify HEAD >/dev/null 2>&1;then
	refhash="$(git rev-parse HEAD)"
else
	refhash="$(git hash-object -t tree /dev/null)"
fi

random=$({
	git var GIT_COMMITTER_IDENT
echo"$refhash"
	cat "$1"
} | git hash-object --stdin)
dest="$1.tmp.${random}"

trap'rm -f "${dest}"' EXIT

if! git stripspace --strip-comments <"$1">"${dest}";then
echo"cannot strip comments from $1"
exit 1
fi

iftest! -s "${dest}";then
echo"file is empty: $1"
exit 1
fi

reviewurl="$(git config --get gerrit.reviewUrl)"
iftest -n "${reviewurl}";then
if! git interpret-trailers --parse <"$1"| grep -q '^Link:.*/id/I[0-9a-f]\{40\}$';then
if! git interpret-trailers \
 --trailer "Link: ${reviewurl%/}/id/I${random}"<"$1">"${dest}";then
echo"cannot insert link footer in $1"
exit 1
fi
fi
else
# Avoid the --in-place option which only appeared in Git 2.8
# Avoid the --if-exists option which only appeared in Git 2.15
if! git -c trailer.ifexists=doNothing interpret-trailers \
 --trailer "Change-Id: I${random}"<"$1">"${dest}";then
echo"cannot insert change-id line in $1"
exit 1
fi
fi

if! mv "${dest}""$1";then
echo"cannot mv ${dest} to $1"
exit 1
fi