Daily bump.
[official-gcc.git] / contrib / prepare-commit-msg
blob5da878458cd214277c432bd4778982218774281d
1 #!/bin/sh
3 # Copyright (C) 2020 Free Software Foundation, Inc.
5 # This file is part of GCC.
7 # GCC is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
10 # any later version.
12 # GCC is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GCC; see the file COPYING. If not, write to
19 # the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20 # Boston, MA 02110-1301, USA.
22 COMMIT_MSG_FILE=$1
23 COMMIT_SOURCE=$2
24 SHA1=$3
26 # We might be on a branch before the file was added.
27 if ! [ -x contrib/mklog.py ]; then exit 0; fi
29 # Can't do anything if $COMMIT_MSG_FILE isn't a file.
30 if ! [ -f "$COMMIT_MSG_FILE" ]; then exit 0; fi
32 # Don't do anything unless requested to.
33 if [ -z "$GCC_FORCE_MKLOG" ]; then exit 0; fi
35 if [ -z "$COMMIT_SOURCE" ] || [ $COMMIT_SOURCE = template ]; then
36 # No source or "template" means new commit.
37 cmd="diff --cached"
39 elif [ $COMMIT_SOURCE = message ]; then
40 # "message" means -m; assume a new commit if there are any changes staged.
41 if ! git diff --cached --quiet; then
42 cmd="diff --cached"
43 else
44 cmd="diff --cached HEAD^"
47 elif [ $COMMIT_SOURCE = commit ]; then
48 # The message of an existing commit. If it's HEAD, assume --amend;
49 # otherwise, assume a new commit with -C.
50 if [ $SHA1 = HEAD ]; then
51 cmd="diff --cached HEAD^"
52 if [ "$(git config gcc-config.mklog-hook-type)" = "smart-amend" ]; then
53 # Check if the existing message still describes the staged changes.
54 f=$(mktemp /tmp/git-commit.XXXXXX) || exit 1
55 git log -1 --pretty=email HEAD > $f
56 printf '\n---\n\n' >> $f
57 git $cmd >> $f
58 if contrib/gcc-changelog/git_email.py "$f" >/dev/null 2>&1; then
59 # Existing commit message is still OK for amended commit.
60 rm $f
61 exit 0
63 rm $f
65 else
66 cmd="diff --cached"
68 else
69 # Do nothing for merge or squash.
70 exit 0
73 # Save diff to a file if requested.
74 DIFF_FILE=$(git config gcc-config.diff-file)
75 if ! [ -z "$DIFF_FILE" ]; then
76 tee="tee $DIFF_FILE"
77 else
78 tee="cat"
81 git $cmd | $tee | git gcc-mklog $GCC_MKLOG_ARGS -c "$COMMIT_MSG_FILE"