From cf8716f934ab98c5632dabb5f72862ec40f67980 Mon Sep 17 00:00:00 2001
From: Nigel Metheringham <nigel@exim.org>
Date: Thu, 27 Jan 2011 20:21:27 +0000
Subject: [PATCH] Initial version of the git/bugzilla script

---
 config.yml                |  11 +++
 script/git-to-bugzilla.pl | 176 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 187 insertions(+)
 create mode 100644 config.yml
 create mode 100755 script/git-to-bugzilla.pl

diff --git a/config.yml b/config.yml
new file mode 100644
index 0000000..b377bba
--- /dev/null
+++ b/config.yml
@@ -0,0 +1,11 @@
+---
+# YAML config
+#
+git_dir:      /Users/nigel/Tasks/exim/exim/.git
+exludehead:   
+lasttag:      .bug_last_commit
+gitweb:       http://git.exim.org/exim.git
+bugzilla:
+  server:     http://bugs.exim.org/
+  user:       git
+  pass:       pass
diff --git a/script/git-to-bugzilla.pl b/script/git-to-bugzilla.pl
new file mode 100755
index 0000000..ef0c870
--- /dev/null
+++ b/script/git-to-bugzilla.pl
@@ -0,0 +1,176 @@
+#!/usr/bin/env perl
+#
+#
+use strict;
+use warnings;
+use Carp;
+use Config::Any;
+use Data::Dump;
+use File::Slurp;
+use FindBin;
+use Getopt::Long;
+use Git::Repository;
+
+use lib "$FindBin::Bin/../lib";
+use WWW::Bugzilla;
+
+my $verbose;
+my $debug;
+
+# ------------------------------------------------------------------------
+sub update_bugzilla {
+    my $cfg  = shift;
+    my $info = shift;
+    my $set  = shift;
+
+    my $bz = WWW::Bugzilla->new(
+        server     => $cfg->{bugzilla}{server},
+        email      => $cfg->{bugzilla}{user},
+        password   => $cfg->{bugzilla}{pass},
+        bug_number => $set->{bug}
+    ) || croak "Cannot open bz - $!";
+
+    my $header = sprintf( "Git commit: %s/commitdiff/%s\n", $cfg->{gitweb}, $info->{rev} );
+    if ( scalar( @{ $info->{diff} } ) > 50 ) {
+
+        # big diff - we skip the diff
+        $bz->additional_comments(
+            join( "\n", $header, @{ $info->{info} }, '', @{ $info->{log} }, '----', @{ $info->{diffstat} } ) );
+    }
+    else {
+
+        # otherwise we do the whole thing
+        $bz->additional_comments( join( "\n", $header, @{ $info->{all} } ) );
+    }
+
+    $bz->change_status("fixed")  if ( $set->{action} eq 'fixes' );
+    $bz->change_status("closed") if ( $set->{action} eq 'closes' );
+
+    $bz->commit;
+
+    printf( "[%d] %s %s [%s]\n", $set->{bug}, $info->{rev}, $info->{log}[0], $set->{action} );
+}
+
+# ------------------------------------------------------------------------
+sub find_bugzilla_references {
+    my $info = shift;
+    my $cfg  = shift;
+
+    my @results;
+    my $action = '';
+    my $bugid;
+    foreach my $line ( @{ $info->{log} } ) {
+        $line = lc($line);
+        if ( $line =~ /(closes|fixes|references):?\s*(?:bug(?:zilla)?)?\s*\#?(\d+)/ ) {
+            $action = $1;
+            $bugid  = $2;
+        }
+        elsif ( $line =~ /\b(?:bug(?:zilla)?)\s*\#?(\d+)/ ) {
+            $action = 'references';
+            $bugid  = $1;
+        }
+        else {
+            next;
+        }
+
+        # remap actions
+        $action = 'closes' if ( $action =~ /^fix/ );
+
+        push( @results, { bug => $bugid, action => $action } );
+        ##printf( "%s\n\taction = %s bugid = %s\n", $info->{rev}, $action, $bugid );
+    }
+    return @results;
+}
+
+# ------------------------------------------------------------------------
+
+sub git_commit_info {
+    my $git = shift;
+    my $rev = shift;
+
+    my @lines = $git->run( 'show', '-M', '-C', '--patch-with-stat', '--pretty=fuller', $rev );
+
+    my $info = {
+        rev      => $rev,
+        info     => [],
+        log      => [],
+        diffstat => [],
+        diff     => [],
+        all      => [@lines],    # deliberate copy
+    };
+
+    while ( my $line = shift @lines ) {
+        last if ( $line =~ /^$/ );
+        push( @{ $info->{info} }, $line );
+    }
+
+    while ( my $line = shift @lines ) {
+        last if ( $line =~ /^---\s*$/ );
+        push( @{ $info->{log} }, $line );
+    }
+
+    while ( my $line = shift @lines ) {
+        last if ( $line =~ /^$/ );
+        push( @{ $info->{diffstat} }, $line );
+    }
+
+    # all the rest
+    $info->{diff} = \@lines;
+
+    return $info;
+}
+
+# ------------------------------------------------------------------------
+
+sub walk_git_commits {
+    my $git = shift;
+    my $cfg = shift;
+
+    my $lastrev = $git->run( 'rev-parse', $cfg->{lastref} );
+    my $headrev = $git->run( 'rev-parse', $cfg->{branch_head} );
+
+    return if ( $lastrev eq $headrev );
+
+    my @revs = $git->run( 'rev-list', '--topo-order', '--no-merges', ( $lastrev . '..' . $headrev ) );
+
+    foreach my $rev ( reverse(@revs) ) {
+        my $info = git_commit_info( $git, $rev );
+
+        #ddx($info);
+        #dd( $info->{info}, $info->{log}[0] );
+        my @sets = find_bugzilla_references( $info, $cfg );
+        foreach my $set (@sets) {
+            update_bugzilla( $cfg, $info, $set );
+        }
+    }
+    return $headrev;
+}
+
+# ------------------------------------------------------------------------
+
+# main
+{
+    my $config;
+
+    GetOptions(
+        'config=s' => \$config,
+        'debug!'   => \$debug,
+        'verbose!' => \$verbose,
+    ) or die "Incorrect options";
+    die "No config file given\n" unless ( $config and -f $config );
+    my $cfg = ( values( %{ Config::Any->load_files( { files => [$config], use_ext => 1 } )->[0] } ) )[0];
+
+    die "No git_dir specified\n" unless ( $cfg->{git_dir} );
+    $cfg->{lasttag} ||= $cfg->{git_dir} . '/refs/tags/BugzillaDone';
+    $cfg->{branch_head} ||= 'HEAD';
+
+    $cfg->{lastref} = -f $cfg->{lasttag} ? read_file( $cfg->{lasttag} ) : 'HEAD';
+    chomp( $cfg->{lastref} );
+
+    my $git = Git::Repository->new( git_dir => $cfg->{git_dir} ) || die "No valid git repo\n";
+
+    my $newlast = walk_git_commits( $git, $cfg );
+    if ($newlast) {
+        write_file( $cfg->{lasttag}, $newlast );
+    }
+}
-- 
2.30.2