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authorLudovic Courtès2012-05-29 22:03:45 +0200
committerLudovic Courtès2012-05-29 22:03:45 +0200
commit5387ab9b13d4bba3c47f4c9fd39848f8b82f9436 (patch)
tree88c4170c139a20299e78b1ef428d17fa4df0c174
parent7da540e9d5fd194ca599b84c3f1ce690fff5b7c4 (diff)
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build: Generate a `ChangeLog' file upon "make dist".
* Makefile.am (gen-ChangeLog, dist-hook): New targets. * build-aux/gitlog-to-changelog: New file, from Gnulib v0.0-6827-g39c3009.
-rw-r--r--Makefile.am16
-rwxr-xr-xbuild-aux/gitlog-to-changelog377
2 files changed, 393 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am
index 778792b..1584681 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,3 +3,19 @@ SUBDIRS = po src doc emacs tests
ACLOCAL_AMFLAGS = -I m4
EXTRA_DIST = TODO THANKS README.Skribe ChangeLog.Skribe
+
+gen-ChangeLog:
+ if ! test -d "$(top_srcdir)/.git"; then \
+ echo "\`.git' not found; \`ChangeLog' not generated" >&2; \
+ elif ! git --version > /dev/null 2>&1; then \
+ echo "git not found; \`ChangeLog' not generated" >&2; \
+ else \
+ "$(top_srcdir)/build-aux/gitlog-to-changelog" \
+ > "$(distdir)/cl-t"; \
+ rm -f "$(distdir)/ChangeLog"; \
+ mv "$(distdir)/cl-t" "$(distdir)/ChangeLog"; \
+ fi
+
+dist-hook: gen-ChangeLog
+
+.PHONY: gen-ChangeLog
diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
new file mode 100755
index 0000000..0efedb0
--- /dev/null
+++ b/build-aux/gitlog-to-changelog
@@ -0,0 +1,377 @@
+eval '(exit $?0)' && eval 'exec perl -wS "$0" ${1+"$@"}'
+ & eval 'exec perl -wS "$0" $argv:q'
+ if 0;
+# Convert git log output to ChangeLog format.
+
+my $VERSION = '2012-01-06 07:14'; # 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.
+
+# Copyright (C) 2008-2012 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 <http://www.gnu.org/licenses/>.
+
+# Written by Jim Meyering
+
+use strict;
+use warnings;
+use Getopt::Long;
+use POSIX qw(strftime);
+
+(my $ME = $0) =~ s|.*/||;
+
+# use File::Coda; # http://meyering.net/code/Coda/
+END {
+ defined fileno STDOUT or return;
+ close STDOUT and return;
+ warn "$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.
+ --since=DATE convert only the logs since DATE;
+ the default is to convert all log entries.
+ --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'
+
+ --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>,
+
+EOF
+ }
+ exit $exit_code;
+}
+
+# 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)
+ {
+ $line =~ /^([0-9a-fA-F]{40})$/
+ 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;
+}
+
+{
+ my $since_date;
+ my $format_string = '%s%n%b%n';
+ my $amend_file;
+ my $append_dot = 0;
+ GetOptions
+ (
+ help => sub { usage 0 },
+ version => sub { print "$ME version $VERSION\n"; exit },
+ 'since=s' => \$since_date,
+ 'format=s' => \$format_string,
+ 'amend=s' => \$amend_file,
+ 'append-dot' => \$append_dot,
+ ) or usage 1;
+
+
+ defined $since_date
+ and unshift @ARGV, "--since=$since_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 $amend_file : {};
+
+ my @cmd = (qw (git log --log-size),
+ '--pretty=format:%H:%ct %an <%ae>%n%n'.$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 = ();
+ 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";
+ $sha =~ /^[0-9a-fA-F]{40}$/
+ or die "$ME:$.: invalid SHA1: $sha\n";
+
+ # 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 = $_;
+ }
+
+ my @line = split "\n", $rest;
+ my $author_line = shift @line;
+ defined $author_line
+ or die "$ME:$.: unexpected EOF\n";
+ $author_line =~ /^(\d+) (.*>)$/
+ or die "$ME:$.: Invalid line "
+ . "(expected date/author/email):\n$author_line\n";
+
+ # Format 'Copyright-paperwork-exempt: Yes' as a standard ChangeLog
+ # `(tiny change)' annotation.
+ my $tiny = (grep (/^Copyright-paperwork-exempt:\s+[Yy]es$/, @line)
+ ? ' (tiny change)' : '');
+
+ my $date_line = sprintf "%s %s$tiny\n",
+ strftime ("%F", localtime ($1)), $2;
+
+ my @coauthors = grep /^Co-authored-by:.*$/, @line;
+ # Omit meta-data lines we've already interpreted.
+ @line = grep !/^(?:Signed-off-by:[ ].*>$
+ |Co-authored-by:[ ]
+ |Copyright-paperwork-exempt:[ ]
+ )/x, @line;
+
+ # Remove leading and trailing blank lines.
+ if (@line)
+ {
+ while ($line[0] =~ /^\s*$/) { shift @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 this header would be different from the previous date/name/email/
+ # coauthors header, or if this or the previous entry consists of two
+ # or more paragraphs, then print the header.
+ if ($date_line ne $prev_date_line
+ or "@coauthors" ne "@prev_coauthors"
+ or $multi_paragraph
+ or $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 $date_line\n";
+ }
+ else
+ {
+ if ($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] .= '.';
+ }
+ }
+
+ # 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 $sha (keys %$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 'write-file-hooks 'time-stamp)
+# time-stamp-start: "my $VERSION = '"
+# time-stamp-format: "%:y-%02m-%02d %02H:%02M"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "'; # UTC"
+# End: