Revision control
++ #!/bin/sh
++ # From Gerrit Code Review 3.10.0
++ #
++ # 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
++ #
++ #
++ # 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.
++ if test "$#" != 1 ; then
++ echo "$0 requires an argument."
++ exit 1
++ fi
++
++ if test ! -f "$1" ; then
++ echo "file does not exist: $1"
++ exit 1
++ fi
++
++ # Do not create a change id if requested
++ case "$(git config --get gerrit.createChangeId)" in
++ false)
++ exit 0
++ ;;
++ always)
++ ;;
++ *)
++ # Do not create a change id for squash/fixup commits.
++ if head -n1 "$1" | LC_ALL=C grep -q '^[a-z][a-z]*! '; then
++ exit 0
++ fi
++ ;;
++ esac
++
++
++ if git rev-parse --verify HEAD >/dev/null 2>&1; then
++ refhash="$(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 "$dest" "$dest-2"' EXIT
++
++ if ! cat "$1" | sed -e '/>8/q' | git stripspace --strip-comments > "${dest}" ; then
++ echo "cannot strip comments from $1"
++ exit 1
++ fi
++
++ if test ! -s "${dest}" ; then
++ echo "file is empty: $1"
++ exit 1
++ fi
++
++ reviewurl="$(git config --get gerrit.reviewUrl)"
++ if test -n "${reviewurl}" ; then
++ token="Link"
++ value="${reviewurl%/}/id/I$random"
++ pattern=".*/id/I[0-9a-f]\{40\}"
++ else
++ token="Change-Id"
++ value="I$random"
++ pattern=".*"
++ fi
++
++ if git interpret-trailers --parse < "$1" | grep -q "^$token: $pattern$" ; then
++ exit 0
++ fi
++
++ # There must be a Signed-off-by trailer for the code below to work. Insert a
++ # sentinel at the end to make sure there is one.
++ # Avoid the --in-place option which only appeared in Git 2.8
++ if ! git interpret-trailers \
++ --trailer "Signed-off-by: SENTINEL" < "$1" > "$dest-2" ; then
++ echo "cannot insert Signed-off-by sentinel line in $1"
++ exit 1
++ fi
++
++ # Make sure the trailer appears before any Signed-off-by trailers by inserting
++ # it as if it was a Signed-off-by trailer and then use sed to remove the
++ # Signed-off-by prefix and the Signed-off-by sentinel line.
++ # Avoid the --in-place option which only appeared in Git 2.8
++ # Avoid the --where option which only appeared in Git 2.15
++ if ! git -c trailer.where=before interpret-trailers \
++ --trailer "Signed-off-by: $token: $value" < "$dest-2" |
++ sed -e "s/^Signed-off-by: \($token: \)/\1/" \
++ -e "/^Signed-off-by: SENTINEL/d" > "$dest" ; then
++ echo "cannot insert $token line in $1"
++ exit 1
++ fi
++
++ if ! mv "${dest}" "$1" ; then
++ echo "cannot mv ${dest} to $1"
++ exit 1
++ fi