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#!/usr/bin/perl
# Generate Git history.
#
# Copyright 2016 Robert Krawitz (rlk@alum.mit.edu)
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
use Getopt::Long;
use strict;
my ($base_file);
my ($base_revision);
GetOptions("i=s" => \$base_file,
"r=s" => \$base_revision);
my ($autline) = "";
my ($curmsg) = "";
my ($curtag) = "";
my (%addlines);
my (%removelines);
my (%filechanges);
my (%files);
my ($state) = 0;
my ($ostate) = 0;
my ($firsttime) = 1;
sub print_it {
if ($curtag ne "") {
print "===============================================================================\n";
print "Name: $curtag\n\n"
}
print "$autline\n";
my (@files) = sort keys %files;
if ($#files >= 0) {
my ($add) = 0;
my ($remove) = 0;
map { $add += $addlines{$_} } @files;
map { $remove += $removelines{$_} } @files;
print " Lines: +$add, -$remove\n";
print " Files:";
my ($fcount) = 0;
foreach my $fn (@files) {
if ($fcount++ == 0) {
print " $fn (";
} else {
print " $fn (";
}
if ($filechanges{$fn} eq 'D') {
print "removed -$removelines{$fn}";
} elsif ($filechanges{$fn} eq 'C') {
print "added +$addlines{$fn}";
} else {
print "+$addlines{$fn}, -$removelines{$fn}";
}
print ")\n";
}
print "\n";
}
print "$curmsg\n";
$autline = "";
$curmsg = "";
$curtag = "";
%addlines = ();
%removelines = ();
%filechanges = ();
%files = ();
}
if ($base_revision) {
$base_revision = "'$base_revision..HEAD'";
}
open(GITLOG, "git log --diff-algorithm=default --summary --numstat --date=short --pretty=format:'>>>GIT1%n%cd <%an> %H%n>>>GIT2%n%B>>>GIT3%n%D%n>>>GIT4' $base_revision|") or die "Can't run git log: $!\n";
while (<GITLOG>) {
if (/>>>GIT([0-9]+)$/) {
$state = $1;
if ($state == 1) {
if (! $firsttime) {
print_it();
}
$firsttime = 0;
}
} elsif ($state == 1) {
$autline = $_;
} elsif ($state == 2) {
if ($_ ne "\n") {
$curmsg .= " ";
}
$curmsg .= $_;
} elsif ($state == 3) {
if (/^tag: ((guten|gimp-)?print-[0-9]+_.*)/) {
$curtag = $1;
}
} elsif ($state == 4) {
if ($_ ne "\n") {
chomp;
$_ =~ s/^[ ]+//;
if (/^delete/) {
my ($junk, $junk, $junk, $fn) = split(/ /, $_, 4);
$filechanges{$fn} = 'D';
} elsif (/^create/) {
my ($junk, $junk, $junk, $fn) = split(/ /, $_, 4);
$filechanges{$fn} = 'C';
} elsif (/^[-0-9]/) {
my ($add, $remove, $fn) = split(/ /, $_, 3);
$add = 0 if ($add eq '-');
$remove = 0 if ($remove eq '-');
$files{$fn} = 1;
$addlines{$fn} = $add;
$removelines{$fn} = $remove;
}
}
} else {
die "Unknown state $state\n";
}
}
print_it();
if ($base_file) {
open IN, $base_file or die "Can't open baseline file $base_file: $!";
while (<IN>) {
print;
}
}
exit 0;
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