mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-18 10:16:51 +00:00
551 lines
17 KiB
Perl
Executable File
551 lines
17 KiB
Perl
Executable File
#!/bin/sh
|
|
#! -*-perl-*-
|
|
|
|
# Convert git log output to ChangeLog format.
|
|
|
|
# Copyright (C) 2008-2024 Free Software Foundation, Inc.
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
#
|
|
# Written by Jim Meyering
|
|
|
|
# This is a prologue that allows running a perl script as an executable
|
|
# on systems that are compliant to a POSIX version before POSIX:2017.
|
|
# On such systems, the usual invocation of an executable through execlp()
|
|
# or execvp() fails with ENOEXEC if it is a script that does not start
|
|
# with a #! line. The script interpreter mentioned in the #! line has
|
|
# to be /bin/sh, because on GuixSD systems that is the only program that
|
|
# has a fixed file name. The second line is essential for perl and is
|
|
# also useful for editing this file in Emacs. The next two lines below
|
|
# are valid code in both sh and perl. When executed by sh, they re-execute
|
|
# the script through the perl program found in $PATH. The '-x' option
|
|
# is essential as well; without it, perl would re-execute the script
|
|
# through /bin/sh. When executed by perl, the next two lines are a no-op.
|
|
eval 'exec perl -wSx "$0" "$@"'
|
|
if 0;
|
|
|
|
my $VERSION = '2024-07-17 02:20'; # UTC
|
|
# The definition above must lie within the first 8 lines in order
|
|
# for the Emacs time-stamp write hook (at end) to update it.
|
|
# If you change this file with Emacs, please let the write hook
|
|
# do its job. Otherwise, update this string manually.
|
|
|
|
(my $copyright_year = $VERSION) =~ s/^(\d*)-.*$/$1/;
|
|
|
|
use strict;
|
|
use warnings;
|
|
use Getopt::Long;
|
|
use POSIX qw(strftime);
|
|
|
|
(my $ME = $0) =~ s|.*/||;
|
|
|
|
# use File::Coda; # https://meyering.net/code/Coda/
|
|
END {
|
|
defined fileno STDOUT or return;
|
|
close STDOUT and return;
|
|
warn "$ME: failed to close standard output: $!\n";
|
|
$? ||= 1;
|
|
}
|
|
|
|
sub usage ($)
|
|
{
|
|
my ($exit_code) = @_;
|
|
my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
|
|
if ($exit_code != 0)
|
|
{
|
|
print $STREAM "Try '$ME --help' for more information.\n";
|
|
}
|
|
else
|
|
{
|
|
print $STREAM <<EOF;
|
|
Usage: $ME [OPTIONS] [ARGS]
|
|
|
|
Convert git log output to ChangeLog format. If present, any ARGS
|
|
are passed to "git log". To avoid ARGS being parsed as options to
|
|
$ME, they may be preceded by '--'.
|
|
|
|
OPTIONS:
|
|
|
|
--amend=FILE FILE maps from an SHA1 to perl code (i.e., s/old/new/) that
|
|
makes a change to SHA1's commit log text or metadata.
|
|
--append-dot append a dot to the first line of each commit message if
|
|
there is no other punctuation or blank at the end.
|
|
--no-cluster never cluster commit messages under the same date/author
|
|
header; the default is to cluster adjacent commit messages
|
|
if their headers are the same and neither commit message
|
|
contains multiple paragraphs.
|
|
--srcdir=DIR the root of the source tree, from which the .git/
|
|
directory can be derived.
|
|
--since=DATE convert only the logs since DATE;
|
|
the default is to convert all log entries.
|
|
--until=DATE convert only the logs older than DATE.
|
|
--ignore-matching=PAT ignore commit messages whose first lines match PAT.
|
|
--ignore-line=PAT ignore lines of commit messages that match PAT.
|
|
--format=FMT set format string for commit subject and body;
|
|
see 'man git-log' for the list of format metacharacters;
|
|
the default is '%s%n%b%n'
|
|
--strip-tab remove one additional leading TAB from commit message lines.
|
|
--strip-cherry-pick remove data inserted by "git cherry-pick";
|
|
this includes the "cherry picked from commit ..." line,
|
|
and the possible final "Conflicts:" paragraph.
|
|
--commit-timezone use dates respecting the timezone commits were made in.
|
|
--help display this help and exit
|
|
--version output version information and exit
|
|
|
|
EXAMPLE:
|
|
|
|
$ME --since=2008-01-01 > ChangeLog
|
|
$ME -- -n 5 foo > last-5-commits-to-branch-foo
|
|
|
|
SPECIAL SYNTAX:
|
|
|
|
The following types of strings are interpreted specially when they appear
|
|
at the beginning of a log message line. They are not copied to the output.
|
|
|
|
Copyright-paperwork-exempt: Yes
|
|
Append the "(tiny change)" notation to the usual "date name email"
|
|
ChangeLog header to mark a change that does not require a copyright
|
|
assignment.
|
|
Co-authored-by: Joe User <user\@example.com>
|
|
List the specified name and email address on a second
|
|
ChangeLog header, denoting a co-author.
|
|
Signed-off-by: Joe User <user\@example.com>
|
|
These lines are simply elided.
|
|
|
|
In a FILE specified via --amend, comment lines (starting with "#") are ignored.
|
|
FILE must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1 (alone on
|
|
a line) referring to a commit in the current project, and CODE refers to one
|
|
or more consecutive lines of Perl code. Pairs must be separated by one or
|
|
more blank line.
|
|
|
|
Here is sample input for use with --amend=FILE, from coreutils:
|
|
|
|
3a169f4c5d9159283548178668d2fae6fced3030
|
|
# fix typo in title:
|
|
s/all tile types/all file types/
|
|
|
|
1379ed974f1fa39b12e2ffab18b3f7a607082202
|
|
# Due to a bug in vc-dwim, I mis-attributed a patch by Paul to myself.
|
|
# Change the author to be Paul. Note the escaped "@":
|
|
s,Jim .*>,Paul Eggert <eggert\\\@cs.ucla.edu>,
|
|
|
|
Send patches and bug reports to <bug-gnulib\@gnu.org>.
|
|
EOF
|
|
}
|
|
exit $exit_code;
|
|
}
|
|
|
|
sub print_version ()
|
|
{
|
|
print "$ME version $VERSION\n";
|
|
print "Copyright (C) $copyright_year Free Software Foundation, Inc.\n";
|
|
print "License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>\n"
|
|
. "This is free software: you are free to change and redistribute it.\n"
|
|
. "There is NO WARRANTY, to the extent permitted by law.\n";
|
|
print "\n";
|
|
my $author = "Jim Meyering";
|
|
print "Written by $author.\n";
|
|
}
|
|
|
|
# If the string $S is a well-behaved file name, simply return it.
|
|
# If it contains white space, quotes, etc., quote it, and return the new string.
|
|
sub shell_quote($)
|
|
{
|
|
my ($s) = @_;
|
|
if ($s =~ m![^\w+/.,-]!)
|
|
{
|
|
# Convert each single quote to '\''
|
|
$s =~ s/\'/\'\\\'\'/g;
|
|
# Then single quote the string.
|
|
$s = "'$s'";
|
|
}
|
|
return $s;
|
|
}
|
|
|
|
sub quoted_cmd(@)
|
|
{
|
|
return join (' ', map {shell_quote $_} @_);
|
|
}
|
|
|
|
# Parse file F.
|
|
# Comment lines (starting with "#") are ignored.
|
|
# F must consist of <SHA,CODE+> pairs where SHA is a 40-byte SHA1
|
|
# (alone on a line) referring to a commit in the current project, and
|
|
# CODE refers to one or more consecutive lines of Perl code.
|
|
# Pairs must be separated by one or more blank line.
|
|
sub parse_amend_file($)
|
|
{
|
|
my ($f) = @_;
|
|
|
|
open F, '<', $f
|
|
or die "$ME: $f: failed to open for reading: $!\n";
|
|
|
|
my $fail;
|
|
my $h = {};
|
|
my $in_code = 0;
|
|
my $sha;
|
|
while (defined (my $line = <F>))
|
|
{
|
|
$line =~ /^\#/
|
|
and next;
|
|
chomp $line;
|
|
$line eq ''
|
|
and $in_code = 0, next;
|
|
|
|
if (!$in_code)
|
|
{
|
|
$line =~ /^([[:xdigit:]]{40})$/
|
|
or (warn "$ME: $f:$.: invalid line; expected an SHA1\n"),
|
|
$fail = 1, next;
|
|
$sha = lc $1;
|
|
$in_code = 1;
|
|
exists $h->{$sha}
|
|
and (warn "$ME: $f:$.: duplicate SHA1\n"),
|
|
$fail = 1, next;
|
|
}
|
|
else
|
|
{
|
|
$h->{$sha} ||= '';
|
|
$h->{$sha} .= "$line\n";
|
|
}
|
|
}
|
|
close F;
|
|
|
|
$fail
|
|
and exit 1;
|
|
|
|
return $h;
|
|
}
|
|
|
|
# git_dir_option $SRCDIR
|
|
#
|
|
# From $SRCDIR, the --git-dir option to pass to git (none if $SRCDIR
|
|
# is undef). Return as a list (0 or 1 element).
|
|
sub git_dir_option($)
|
|
{
|
|
my ($srcdir) = @_;
|
|
my @res = ();
|
|
if (defined $srcdir)
|
|
{
|
|
my $qdir = shell_quote $srcdir;
|
|
my $cmd = "cd $qdir && git rev-parse --show-toplevel";
|
|
my $qcmd = shell_quote $cmd;
|
|
my $git_dir = qx($cmd);
|
|
defined $git_dir
|
|
or die "$ME: cannot run $qcmd: $!\n";
|
|
$? == 0
|
|
or die "$ME: $qcmd had unexpected exit code or signal ($?)\n";
|
|
chomp $git_dir;
|
|
push @res, "--git-dir=$git_dir/.git";
|
|
}
|
|
@res;
|
|
}
|
|
|
|
{
|
|
my $since_date;
|
|
my $until_date;
|
|
my $format_string = '%s%n%b%n';
|
|
my $amend_file;
|
|
my $append_dot = 0;
|
|
my $cluster = 1;
|
|
my $ignore_matching;
|
|
my $ignore_line;
|
|
my $strip_tab = 0;
|
|
my $strip_cherry_pick = 0;
|
|
my $commit_timezone = 0;
|
|
my $srcdir;
|
|
GetOptions
|
|
(
|
|
help => sub { usage 0 },
|
|
version => sub { print_version; exit },
|
|
'since=s' => \$since_date,
|
|
'until=s' => \$until_date,
|
|
'format=s' => \$format_string,
|
|
'amend=s' => \$amend_file,
|
|
'append-dot' => \$append_dot,
|
|
'cluster!' => \$cluster,
|
|
'ignore-matching=s' => \$ignore_matching,
|
|
'ignore-line=s' => \$ignore_line,
|
|
'strip-tab' => \$strip_tab,
|
|
'strip-cherry-pick' => \$strip_cherry_pick,
|
|
'commit-timezone' => \$commit_timezone,
|
|
'srcdir=s' => \$srcdir,
|
|
) or usage 1;
|
|
|
|
defined $since_date
|
|
and unshift @ARGV, "--since=$since_date";
|
|
defined $until_date
|
|
and unshift @ARGV, "--until=$until_date";
|
|
|
|
# This is a hash that maps an SHA1 to perl code (i.e., s/old/new/)
|
|
# that makes a correction in the log or attribution of that commit.
|
|
my $amend_code = defined $amend_file ? parse_amend_file $amend_file : {};
|
|
|
|
my $commit_time_format = $commit_timezone ? '%cI' : '%ct';
|
|
my @cmd = ('git',
|
|
git_dir_option $srcdir,
|
|
qw(log --log-size),
|
|
("--pretty=format:%H:$commit_time_format"
|
|
. ' %an <%ae>%n%n'.$format_string, @ARGV));
|
|
open PIPE, '-|', @cmd
|
|
or die ("$ME: failed to run '". quoted_cmd (@cmd) ."': $!\n"
|
|
. "(Is your Git too old? Version 1.5.1 or later is required.)\n");
|
|
|
|
my $prev_multi_paragraph;
|
|
my $prev_date_line = '';
|
|
my @prev_coauthors = ();
|
|
my @skipshas = ();
|
|
while (1)
|
|
{
|
|
defined (my $in = <PIPE>)
|
|
or last;
|
|
$in =~ /^log size (\d+)$/
|
|
or die "$ME:$.: Invalid line (expected log size):\n$in";
|
|
my $log_nbytes = $1;
|
|
|
|
my $log;
|
|
my $n_read = read PIPE, $log, $log_nbytes;
|
|
$n_read == $log_nbytes
|
|
or die "$ME:$.: unexpected EOF\n";
|
|
|
|
# Extract leading hash.
|
|
my ($sha, $rest) = split ':', $log, 2;
|
|
defined $sha
|
|
or die "$ME:$.: malformed log entry\n";
|
|
$sha =~ /^[[:xdigit:]]{40}$/
|
|
or die "$ME:$.: invalid SHA1: $sha\n";
|
|
|
|
my $skipflag = 0;
|
|
if (@skipshas)
|
|
{
|
|
foreach(@skipshas)
|
|
{
|
|
if ($sha =~ /^$_/)
|
|
{
|
|
$skipflag = $_;
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
|
|
# If this commit's log requires any transformation, do it now.
|
|
my $code = $amend_code->{$sha};
|
|
if (defined $code)
|
|
{
|
|
eval 'use Safe';
|
|
my $s = new Safe;
|
|
# Put the unpreprocessed entry into "$_".
|
|
$_ = $rest;
|
|
|
|
# Let $code operate on it, safely.
|
|
my $r = $s->reval("$code")
|
|
or die "$ME:$.:$sha: failed to eval \"$code\":\n$@\n";
|
|
|
|
# Note that we've used this entry.
|
|
delete $amend_code->{$sha};
|
|
|
|
# Update $rest upon success.
|
|
$rest = $_;
|
|
}
|
|
|
|
# Remove lines inserted by "git cherry-pick".
|
|
if ($strip_cherry_pick)
|
|
{
|
|
$rest =~ s/^\s*Conflicts:\n.*//sm;
|
|
$rest =~ s/^\s*\(cherry picked from commit [\da-f]+\)\n//m;
|
|
}
|
|
|
|
my @line = split /[ \t]*\n/, $rest;
|
|
my $author_line = shift @line;
|
|
defined $author_line
|
|
or die "$ME:$.: unexpected EOF\n";
|
|
$author_line =~ /^(\S+) (.*>)$/
|
|
or die "$ME:$.: Invalid line "
|
|
. "(expected date/author/email):\n$author_line\n";
|
|
|
|
# Author <email>
|
|
my $author = $2;
|
|
|
|
my $commit_date = $1;
|
|
if (! $commit_timezone)
|
|
{
|
|
# Seconds since the Epoch.
|
|
$commit_date = strftime "%Y-%m-%d", localtime ($commit_date);
|
|
}
|
|
else
|
|
{
|
|
# ISO 8601 date.
|
|
$commit_date =~ s/T.*$//;
|
|
}
|
|
|
|
# Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
|
|
# '(tiny change)' annotation.
|
|
my $tiny = (grep (/^(?:Copyright-paperwork-exempt|Tiny-change):\s+[Yy]es$/, @line)
|
|
? ' (tiny change)' : '');
|
|
|
|
my $date_line = "$commit_date $author$tiny\n";
|
|
|
|
my @coauthors = grep /^Co-authored-by:.*$/, @line;
|
|
# Omit meta-data lines we've already interpreted.
|
|
@line = grep !/^(?:Signed-off-by:[ ].*>$
|
|
|Co-authored-by:[ ]
|
|
|Copyright-paperwork-exempt:[ ]
|
|
|Tiny-change:[ ]
|
|
)/x, @line;
|
|
|
|
# Remove leading and trailing blank lines.
|
|
if (@line)
|
|
{
|
|
while ($line[0] =~ /^\s*$/) { shift @line; }
|
|
while ($line[$#line] =~ /^\s*$/) { pop @line; }
|
|
}
|
|
|
|
# Handle Emacs gitmerge.el "skipped" commits.
|
|
# Yes, this should be controlled by an option. So sue me.
|
|
if ( grep /^(; )?Merge from /, @line )
|
|
{
|
|
my $found = 0;
|
|
foreach (@line)
|
|
{
|
|
if (grep /^The following commit.*skipped:$/, $_)
|
|
{
|
|
$found = 1;
|
|
## Reset at each merge to reduce chance of false matches.
|
|
@skipshas = ();
|
|
next;
|
|
}
|
|
if ($found && $_ =~ /^([[:xdigit:]]{7,}) [^ ]/)
|
|
{
|
|
push ( @skipshas, $1 );
|
|
}
|
|
}
|
|
}
|
|
|
|
# Ignore commits that match the --ignore-matching pattern, if specified.
|
|
if (defined $ignore_matching && @line && $line[0] =~ /$ignore_matching/)
|
|
{
|
|
$skipflag = 1;
|
|
}
|
|
elsif ($skipflag)
|
|
{
|
|
## Perhaps only warn if a pattern matches more than once?
|
|
warn "$ME: warning: skipping $sha due to $skipflag\n";
|
|
}
|
|
|
|
if (! $skipflag)
|
|
{
|
|
if (defined $ignore_line && @line)
|
|
{
|
|
@line = grep ! /$ignore_line/, @line;
|
|
while ($line[$#line] =~ /^\s*$/) { pop @line; }
|
|
}
|
|
|
|
# Record whether there are two or more paragraphs.
|
|
my $multi_paragraph = grep /^\s*$/, @line;
|
|
|
|
# Format 'Co-authored-by: A U Thor <email@example.com>' lines in
|
|
# standard multi-author ChangeLog format.
|
|
for (@coauthors)
|
|
{
|
|
s/^Co-authored-by:\s*/\t /;
|
|
s/\s*</ </;
|
|
|
|
/<.*?@.*\..*>/
|
|
or warn "$ME: warning: missing email address for "
|
|
. substr ($_, 5) . "\n";
|
|
}
|
|
|
|
# If clustering of commit messages has been disabled, if this header
|
|
# would be different from the previous date/name/etc. header,
|
|
# or if this or the previous entry consists of two or more paragraphs,
|
|
# then print the header.
|
|
if ( ! $cluster
|
|
|| $date_line ne $prev_date_line
|
|
|| "@coauthors" ne "@prev_coauthors"
|
|
|| $multi_paragraph
|
|
|| $prev_multi_paragraph)
|
|
{
|
|
$prev_date_line eq ''
|
|
or print "\n";
|
|
print $date_line;
|
|
@coauthors
|
|
and print join ("\n", @coauthors), "\n";
|
|
}
|
|
$prev_date_line = $date_line;
|
|
@prev_coauthors = @coauthors;
|
|
$prev_multi_paragraph = $multi_paragraph;
|
|
|
|
# If there were any lines
|
|
if (@line == 0)
|
|
{
|
|
warn "$ME: warning: empty commit message:\n"
|
|
. " commit $sha\n $date_line\n";
|
|
}
|
|
else
|
|
{
|
|
if ($append_dot)
|
|
{
|
|
# If the first line of the message has enough room, then
|
|
if (length $line[0] < 72)
|
|
{
|
|
# append a dot if there is no other punctuation or blank
|
|
# at the end.
|
|
$line[0] =~ /[[:punct:]\s]$/
|
|
or $line[0] .= '.';
|
|
}
|
|
}
|
|
|
|
# Remove one additional leading TAB from each line.
|
|
$strip_tab
|
|
and map { s/^\t// } @line;
|
|
|
|
# Prefix each non-empty line with a TAB.
|
|
@line = map { length $_ ? "\t$_" : '' } @line;
|
|
|
|
print "\n", join ("\n", @line), "\n";
|
|
}
|
|
}
|
|
|
|
defined ($in = <PIPE>)
|
|
or last;
|
|
$in ne "\n"
|
|
and die "$ME:$.: unexpected line:\n$in";
|
|
}
|
|
|
|
close PIPE
|
|
or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
|
|
# FIXME-someday: include $PROCESS_STATUS in the diagnostic
|
|
|
|
# Complain about any unused entry in the --amend=F specified file.
|
|
my $fail = 0;
|
|
foreach my $sha (sort keys %$amend_code)
|
|
{
|
|
warn "$ME:$amend_file: unused entry: $sha\n";
|
|
$fail = 1;
|
|
}
|
|
|
|
exit $fail;
|
|
}
|
|
|
|
# Local Variables:
|
|
# mode: perl
|
|
# indent-tabs-mode: nil
|
|
# eval: (add-hook 'before-save-hook 'time-stamp nil t)
|
|
# time-stamp-line-limit: 50
|
|
# time-stamp-start: "my $VERSION = '"
|
|
# time-stamp-format: "%:y-%02m-%02d %02H:%02M"
|
|
# time-stamp-time-zone: "UTC0"
|
|
# time-stamp-end: "'; # UTC"
|
|
# End:
|