tools/cgi/tweak-log.cgi - subversion - Git at Google

 #!/usr/bin/perl

 ###############################################################################
 # Tweak Subversion log messages
 # -----------------------------
 #
 # It sure would be nice to be able to change the log messages on
 # committed revisions of the Subversion repository via the web.  This
 # is a quick attempt at making that happen.
 #
 # The idea here is that you visit this script at the web page.  With
 # no action supplied, it will present a form asking for the revision
 # of the log you wish to change.
 #
 # Upon submitting the form, it will come back with yet another form,
 # which will:
 #
 #   - Display the current log message as static text.
 #   - Present a textarea for editing, initialized with the current
 #     log message.
 #
 # The user can edit the message in the textarea, then submit that form,
 # which will return a confirmation and show the new log message.
 ###############################################################################

 use strict;
 use CGI qw(:standard);

 ###############################################################################
 # Configuration Section

 my $gSvnlookCmd = '/usr/local/bin/svnlook';
 my $gSvnadminCmd = '/usr/local/bin/svnadmin';
 my $gReposPath = '/usr/www/repositories/svn';
 my $gActionURL = './tweak-log.cgi';
 my $gTempfilePrefix = '/tmp/tweak-cgi';
 my $gHistoryFile = './TWEAKLOG';
 ###############################################################################

 my %gCGIValues = &doCGI( );
 &main( );

 #-----------------------------------------------------------------------------#
 sub doCGI
 # (void)
 #-----------------------------------------------------------------------------#
 {
     my $lCGI = new CGI;
     my @lFields = $lCGI->param;
     my $lField;
     my %lCGIData = ();

     foreach $lField ( @lFields )
     {
         $lCGIData{ uc $lField } = $lCGI->param( $lField );
     }
     return( %lCGIData );
 }


 #-----------------------------------------------------------------------------#
 sub doError
 # (error)
 #-----------------------------------------------------------------------------#
 {
     my $error = shift @_;

     print "<html><head><title>Tweak Log - Error</title></head>\n";
     print "<body><h1>ERROR</h1>\n<p>$error</p></body></html>\n";
     return;
 }


 #-----------------------------------------------------------------------------#
 sub main
 # (void)
 #-----------------------------------------------------------------------------#
 {
     # Print out HTTP headers.
     print "Content-type: text/html\n\n";

     # Figure out what action to take.
     if( $gCGIValues{'ACTION'} =~ /fetch/i )
     {
 	&doFetchLog();
     }
     elsif( $gCGIValues{'ACTION'} =~ /commit/i )
     {
 	&doCommitLog();
     }
     else
     {
 	&doInitialForm();
     }
     return;
 }


 #-----------------------------------------------------------------------------#
 sub doInitialForm
 # (void)
 #-----------------------------------------------------------------------------#
 {
     print "<html>\n<head>\n<title>Tweak Log</title>\n</head>\n";
     print "<body>\n<form action=\"$gActionURL\" method=\"post\">\n";
     print "<p>\n";
     print "Boy, I sure would like to modify that log message for \n";
     print "revision <input type=\"text\" name=\"rev\" value\"\">\n";
     print "<input type=\"submit\" name=\"action\" value=\"Fetch Log\">\n";
     print "</p></form></body></html>\n";
     return;
 }


 #-----------------------------------------------------------------------------#
 sub isValidRev
 # (rev)
 #-----------------------------------------------------------------------------#
 {
     my $youngest = `$gSvnadminCmd youngest $gReposPath`;
     my $rev = shift @_;

     if(not (( $youngest =~ /^\d+$/) and
 	    ( $youngest > 0 )))
     {
 	&doError( "Unable to determine youngest revision" );
 	return 0;
     }
     if(not (( $rev =~ /^\d+$/) and
 	    ( $rev <= $youngest )))
     {
 	&doError( "'$rev' is not a valid revision number" );
 	return 0;
     }
     return 1;
 }


 #-----------------------------------------------------------------------------#
 sub html_escape
 # (log)
 #-----------------------------------------------------------------------------#
 {
   my $str = shift;
   $str =~ s/&/&amp;/g;
   $str =~ s/>/&gt;/g;
   $str =~ s/</&lt;/g;
   return $str;
 }

 #-----------------------------------------------------------------------------#
 sub doFetchLog
 # (void)
 #-----------------------------------------------------------------------------#
 {
     my $rev = $gCGIValues{'REV'};
     my $log;
     my $escaped_log;   ## HTML-escaped version of $log

     # Make sure we've requested a valid revision.
     if( not &isValidRev( $rev ))
     {
 	return;
     }

     # Fetch the log for that revision.
     $log = `$gSvnlookCmd $gReposPath rev $rev log`;

     $escaped_log = &html_escape ($log);

     # Display the form for editing the revision
     print "<html>\n<head>\n<title>Tweak Log - Log Edit</title>\n</head>\n";
     print "<body>\n";
     print "<h1>Editing Log Message for Revision $rev</h1>\n";
     print "<h2>Current log message:</h2>\n";
     print "<blockquote><hr /><pre>$escaped_log</pre><hr /></blockquote>\n";
     print "\n<p>\n";
     print "<font color=\"red\">\n";
     print "<i>Every change made is logged in <tt>${gHistoryFile}</tt> in\n";
     print "the directory this cgi script runs in.  If you make a bogus\n";
     print "change, you can still recover the old message from there.</i>\n";
     print "</font>\n";
     print "\n<p>\n";
     print "<form action=\"$gActionURL\" method=\"post\">\n";
     print "<h2>New log message:</h2>\n";
     print "<blockquote>\n";
     print "<textarea cols=\"80\" rows=\"25\" wrap=\"off\" name=\"log\">\n";
     print $log;
     print "</textarea><br />\n";
     print "<input type=\"hidden\" name=\"rev\" value=\"$rev\">\n";
     print "<input type=\"submit\" name=\"action\" value=\"Commit Changes\">\n";
     print "</blockquote>\n";
     print "</form></body></html>\n";
     return;
 }


 #-----------------------------------------------------------------------------#
 sub doCommitLog
 # (void)
 #-----------------------------------------------------------------------------#
 {
     my $rev = $gCGIValues{'REV'};
     my $log = $gCGIValues{'LOG'};
     my $orig_log;
     my $tempfile = "$gTempfilePrefix.$$";

     # Make sure we are about to change a valid revision.
     if (not &isValidRev( $rev ))
     {
 	return;
     }

     # Get the original log from the repository.
     $orig_log = `$gSvnlookCmd $gReposPath rev $rev log`;

     # If nothing was changed, go complain to the user (shame on him for
     # wasting our time like that!)
     if ($log eq $orig_log)
     {
 	&doError ("Log message doesn't appear to have been edited.");
 	return;
     }

     # Open a tempfile
     if (not (open( LOGFILE, "> $tempfile")))
     {
 	&doError ("Unable to open temporary file.");
 	return;
     }

     # Dump the new log into the tempfile (and close it)
     print LOGFILE $log;
     close LOGFILE;

     # Tell our history file what we're about to do.
     if ($gHistoryFile)
     {
         if (not (open (HISTORY, ">> $gHistoryFile")))
         {
             &doError ("Unable to open history file.");
             return;
         }
         print HISTORY "====================================================\n";
         print HISTORY "REVISION $rev WAS:\n";
         print HISTORY "----------------------------------------------------\n";
         print HISTORY $orig_log;
         print HISTORY "\n";
     }

     # Now, make the mods
     `$gSvnadminCmd setlog $gReposPath $rev $tempfile`;

     # ...and remove the tempfile.  It is, after all, temporary.
     unlink $tempfile;

     # Now, tell the history file what we did.
     if ($gHistoryFile)
     {
         print HISTORY "----------------------------------------------------\n";
         print HISTORY "REVISION $rev IS:\n";
         print HISTORY "----------------------------------------------------\n";
         print HISTORY $log;
         print HISTORY "\n";
         close HISTORY;
     }

     # Now, re-read that logfile
     $log = `$gSvnlookCmd $gReposPath rev $rev log`;
     $log = &html_escape ($log);

     print "<html>\n<head>\n<title>Tweak Log - Log Changed</title>\n</head>\n";
     print "<body>\n";
     print "<h1>Success!</h1>\n";
     print "<h2>New Log Message for Revision $rev</h2>\n";
     print "<blockquote><hr /><pre>$log</pre><hr /></blockquote>\n";
     print "</body></html>\n";
     return;
 }
	#!/usr/bin/perl

	###############################################################################
	# Tweak Subversion log messages
	# -----------------------------
	#
	# It sure would be nice to be able to change the log messages on
	# committed revisions of the Subversion repository via the web. This
	# is a quick attempt at making that happen.
	#
	# The idea here is that you visit this script at the web page. With
	# no action supplied, it will present a form asking for the revision
	# of the log you wish to change.
	#
	# Upon submitting the form, it will come back with yet another form,
	# which will:
	#
	# - Display the current log message as static text.
	# - Present a textarea for editing, initialized with the current
	# log message.
	#
	# The user can edit the message in the textarea, then submit that form,
	# which will return a confirmation and show the new log message.
	###############################################################################

	use strict;
	use CGI qw(:standard);

	###############################################################################
	# Configuration Section

	my $gSvnlookCmd = '/usr/local/bin/svnlook';
	my $gSvnadminCmd = '/usr/local/bin/svnadmin';
	my $gReposPath = '/usr/www/repositories/svn';
	my $gActionURL = './tweak-log.cgi';
	my $gTempfilePrefix = '/tmp/tweak-cgi';
	my $gHistoryFile = './TWEAKLOG';
	###############################################################################

	my %gCGIValues = &doCGI( );
	&main( );

	#-----------------------------------------------------------------------------#
	sub doCGI
	# (void)
	#-----------------------------------------------------------------------------#
	{
	my $lCGI = new CGI;
	my @lFields = $lCGI->param;
	my $lField;
	my %lCGIData = ();

	foreach $lField ( @lFields )
	{
	$lCGIData{ uc $lField } = $lCGI->param( $lField );
	}
	return( %lCGIData );
	}


	#-----------------------------------------------------------------------------#
	sub doError
	# (error)
	#-----------------------------------------------------------------------------#
	{
	my $error = shift @_;

	print "<html><head><title>Tweak Log - Error</title></head>\n";
	print "<body><h1>ERROR</h1>\n<p>$error</p></body></html>\n";
	return;
	}


	#-----------------------------------------------------------------------------#
	sub main
	# (void)
	#-----------------------------------------------------------------------------#
	{
	# Print out HTTP headers.
	print "Content-type: text/html\n\n";

	# Figure out what action to take.
	if( $gCGIValues{'ACTION'} =~ /fetch/i )
	{
	&doFetchLog();
	}
	elsif( $gCGIValues{'ACTION'} =~ /commit/i )
	{
	&doCommitLog();
	}
	else
	{
	&doInitialForm();
	}
	return;
	}


	#-----------------------------------------------------------------------------#
	sub doInitialForm
	# (void)
	#-----------------------------------------------------------------------------#
	{
	print "<html>\n<head>\n<title>Tweak Log</title>\n</head>\n";
	print "<body>\n<form action=\"$gActionURL\" method=\"post\">\n";
	print "<p>\n";
	print "Boy, I sure would like to modify that log message for \n";
	print "revision <input type=\"text\" name=\"rev\" value\"\">\n";
	print "<input type=\"submit\" name=\"action\" value=\"Fetch Log\">\n";
	print "</p></form></body></html>\n";
	return;
	}


	#-----------------------------------------------------------------------------#
	sub isValidRev
	# (rev)
	#-----------------------------------------------------------------------------#
	{
	my $youngest = `$gSvnadminCmd youngest $gReposPath`;
	my $rev = shift @_;

	if(not (( $youngest =~ /^\d+$/) and
	( $youngest > 0 )))
	{
	&doError( "Unable to determine youngest revision" );
	return 0;
	}
	if(not (( $rev =~ /^\d+$/) and
	( $rev <= $youngest )))
	{
	&doError( "'$rev' is not a valid revision number" );
	return 0;
	}
	return 1;
	}



	#-----------------------------------------------------------------------------#
	sub html_escape
	# (log)
	#-----------------------------------------------------------------------------#
	{
	my $str = shift;
	$str =~ s/&/&/g;
	$str =~ s/>/>/g;
	$str =~ s/</</g;
	return $str;
	}

	#-----------------------------------------------------------------------------#
	sub doFetchLog
	# (void)
	#-----------------------------------------------------------------------------#
	{
	my $rev = $gCGIValues{'REV'};
	my $log;
	my $escaped_log; ## HTML-escaped version of $log

	# Make sure we've requested a valid revision.
	if( not &isValidRev( $rev ))
	{
	return;
	}

	# Fetch the log for that revision.
	$log = `$gSvnlookCmd $gReposPath rev $rev log`;

	$escaped_log = &html_escape ($log);

	# Display the form for editing the revision
	print "<html>\n<head>\n<title>Tweak Log - Log Edit</title>\n</head>\n";
	print "<body>\n";
	print "<h1>Editing Log Message for Revision $rev</h1>\n";
	print "<h2>Current log message:</h2>\n";
	print "<blockquote><hr /><pre>$escaped_log</pre><hr /></blockquote>\n";
	print "\n<p>\n";
	print "<font color=\"red\">\n";
	print "<i>Every change made is logged in <tt>${gHistoryFile}</tt> in\n";
	print "the directory this cgi script runs in. If you make a bogus\n";
	print "change, you can still recover the old message from there.</i>\n";
	print "</font>\n";
	print "\n<p>\n";
	print "<form action=\"$gActionURL\" method=\"post\">\n";
	print "<h2>New log message:</h2>\n";
	print "<blockquote>\n";
	print "<textarea cols=\"80\" rows=\"25\" wrap=\"off\" name=\"log\">\n";
	print $log;
	print "</textarea><br />\n";
	print "<input type=\"hidden\" name=\"rev\" value=\"$rev\">\n";
	print "<input type=\"submit\" name=\"action\" value=\"Commit Changes\">\n";
	print "</blockquote>\n";
	print "</form></body></html>\n";
	return;
	}


	#-----------------------------------------------------------------------------#
	sub doCommitLog
	# (void)
	#-----------------------------------------------------------------------------#
	{
	my $rev = $gCGIValues{'REV'};
	my $log = $gCGIValues{'LOG'};
	my $orig_log;
	my $tempfile = "$gTempfilePrefix.$$";

	# Make sure we are about to change a valid revision.
	if (not &isValidRev( $rev ))
	{
	return;
	}

	# Get the original log from the repository.
	$orig_log = `$gSvnlookCmd $gReposPath rev $rev log`;

	# If nothing was changed, go complain to the user (shame on him for
	# wasting our time like that!)
	if ($log eq $orig_log)
	{
	&doError ("Log message doesn't appear to have been edited.");
	return;
	}

	# Open a tempfile
	if (not (open( LOGFILE, "> $tempfile")))
	{
	&doError ("Unable to open temporary file.");
	return;
	}

	# Dump the new log into the tempfile (and close it)
	print LOGFILE $log;
	close LOGFILE;

	# Tell our history file what we're about to do.
	if ($gHistoryFile)
	{
	if (not (open (HISTORY, ">> $gHistoryFile")))
	{
	&doError ("Unable to open history file.");
	return;
	}
	print HISTORY "====================================================\n";
	print HISTORY "REVISION $rev WAS:\n";
	print HISTORY "----------------------------------------------------\n";
	print HISTORY $orig_log;
	print HISTORY "\n";
	}

	# Now, make the mods
	`$gSvnadminCmd setlog $gReposPath $rev $tempfile`;

	# ...and remove the tempfile. It is, after all, temporary.
	unlink $tempfile;

	# Now, tell the history file what we did.
	if ($gHistoryFile)
	{
	print HISTORY "----------------------------------------------------\n";
	print HISTORY "REVISION $rev IS:\n";
	print HISTORY "----------------------------------------------------\n";
	print HISTORY $log;
	print HISTORY "\n";
	close HISTORY;
	}

	# Now, re-read that logfile
	$log = `$gSvnlookCmd $gReposPath rev $rev log`;
	$log = &html_escape ($log);

	print "<html>\n<head>\n<title>Tweak Log - Log Changed</title>\n</head>\n";
	print "<body>\n";
	print "<h1>Success!</h1>\n";
	print "<h2>New Log Message for Revision $rev</h2>\n";
	print "<blockquote><hr /><pre>$log</pre><hr /></blockquote>\n";
	print "</body></html>\n";
	return;
	}