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# Pretty simple ChangeLog generator -*-perl-*-
# Copyright (C) 2019 Sergey Poznyakoff
# Distributed under the terms of the GNU General Public License, either
# version 3, or (at your option) any later version. See file COPYING
# for the text of the license.
use strict;
use warnings;
my $name = shift @ARGV || 'ChangeLog';
my $outfile = "$name.$$";
END {
if (-f $outfile) {
unlink $outfile
}
}
my $header;
die "must be run in a cloned source tree\n" unless -d '.git';
if (-f $name) {
open(FH, '<', $name)
or die "can't open $name for reading: $!\n";
chomp($header = <FH>);
close FH
}
open(STDIN, '-|',
q{git log --pretty='format:<%ci>%an <%ae>%n%n%s%n%n%b%n'})
or die "can't run git: $!\n";
open(STDOUT, '>', $outfile)
or die "can't open temporary file\n";
my $nl = 0;
while (<>) {
chomp;
if (/^\s*$/) {
$nl++;
} else {
if ($nl) {
print "\n";
$nl = 0;
}
if (s/^<([\d-]+) .*?>(.*)/$1 $2/) {
if (defined($header)) {
if ($_ eq $header) {
exit(0)
}
$header = undef
}
} else {
print "\t";
}
print "$_\n";
}
}
print "\f\nLocal Variables:\n";
print <<'EOT';
mode: change-log
version-control: never
buffer-read-only: t
End:
EOT
;
close STDOUT;
if (-f $name) {
unlink $name or die "can't unlink $name: $!\n";
}
rename $outfile, $name or die "can't rename $outfile to $name: $!\n";
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