Revert "build: Add a commit-msg hook that embeds Change-Id in commit messages."

This reverts commit 8005e09b261d65bf0f7469cd8e89423c1c1db820 and follow-ups.
This was added 2 years ago to be able to trace commits between the git
repository and the guix-patches tracker, and to implement a solution to
automatically close merged commits (which has not materialized).

Since we have now migrated to Codeberg, the cross-referencing between reviewed
commits (pull requests) and the actual commits merged can be done in the
Codeberg UI (via the 'manually merged' option), and Codeberg also supports
closing a bug via the "Fixes: #NNN" git trailer, and as a convention we can
add a "Merges: !NNN" git trailer in a commit closing a PR (the actual closing
is not yet implemented by Forgejo), which mostly obsoletes the purpose of the
Change-Id git trailer.

1 files changed, 0 insertions, 124 deletions

diff --git a/etc/git/commit-msg b/etc/git/commit-msg
deleted file mode 100755
index 7175c158123..00000000000
--- a/etc/git/commit-msg
+++ /dev/null
@@ -1,124 +0,0 @@
-#!/bin/sh
-#
-# 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.
-
-### Guix modifications start
-COMMIT_MSG_MAGIC=VGhpcyBpcyB0aGUgY29tbWl0LW1zZyBob29rIG9mIEd1aXg=
-top=$(git rev-parse --show-toplevel)
-if test -d "$top/.git/hooks/commit-msg.d/"; then
-    for msg_hook in "$top/.git/hooks/commit-msg.d/"*; do
-        if ! sh "$msg_hook"; then
-            echo "error while running $msg_hook"
-            exit 1
-        fi
-    done
-fi
-### Guix modifications end
-
-set -u
-
-# avoid [[ which is not POSIX sh.
-if test "$#" != 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 ! sed -e '/>8/q' "$1" | git stripspace --strip-comments > "${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 --no-divider --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 \
-         --no-divider \
-         --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 \
-         --no-divider \
-         --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