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comp.php
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comp.php
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<?php
// WebSVN - Subversion repository viewing via the web using PHP
// Copyright (C) 2004-2006 Tim Armes
//
// 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
//
// --
//
// comp.php
//
// Compare two paths using `svn diff`
//
require_once 'include/setup.php';
require_once 'include/svnlook.php';
require_once 'include/utils.php';
require_once 'include/template.php';
function checkRevision($rev)
{
if (is_numeric($rev) && ((int) $rev > 0)) {
return $rev;
}
$rev = strtoupper($rev);
if ($rev == 'HEAD' || $rev == 'PREV' || $rev == 'COMMITTED') {
return $rev;
}
return 'HEAD';
}
// Make sure that we have a repository
if ($rep) {
$svnrep = new SVNRepository($rep);
// Retrieve the request information
$path1 = @$_REQUEST['compare'][0];
$path2 = @$_REQUEST['compare'][1];
$rev1 = (int) @$_REQUEST['compare_rev'][0];
$rev2 = (int) @$_REQUEST['compare_rev'][1];
$manualOrder = (@$_REQUEST['manualorder'] == 1);
$ignoreWhitespace = (@$_REQUEST['ignorews'] == 1);
// Some page links put the revision with the path...
if (strpos($path1, '@')) {
list($path1, $rev1) = explode('@', $path1);
} else {
if (strpos($path1, '@') === 0) {
// Something went wrong. The path is missing.
$rev1 = substr($path1, 1);
$path1 = '/';
}
}
if (strpos($path2, '@')) {
list($path2, $rev2) = explode('@', $path2);
} else {
if (strpos($path2, '@') === 0) {
$rev2 = substr($path2, 1);
$path2 = '/';
}
}
$rev1 = checkRevision($rev1);
$rev2 = checkRevision($rev2);
// Choose a sensible comparison order unless told not to
if (!$manualOrder && is_numeric($rev1) && is_numeric($rev2) && $rev1 > $rev2) {
$tempPath = $path1;
$path1 = $path2;
$path2 = $tempPath;
$tempRev = $rev1;
$rev1 = $rev2;
$rev2 = $tempRev;
}
$vars['rev1url'] = $config->getURL($rep, $path1, 'dir') . createRevAndPegString($rev1, $rev1);
$vars['rev2url'] = $config->getURL($rep, $path2, 'dir') . createRevAndPegString($rev2, $rev2);
$url = $config->getURL($rep, '', 'comp');
$vars['reverselink'] = '<a href="' . $url . 'compare%5B%5D=' . urlencode($path2) . '@' . $rev2 . '&compare%5B%5D=' . urlencode($path1) . '@' . $rev1 . '&manualorder=1' . ($ignoreWhitespace ? '&ignorews=1'
: '') . '">' . $lang['REVCOMP'] . '</a>';
if (!$ignoreWhitespace) {
$vars['ignorewhitespacelink'] = '<a href="' . $url . 'compare%5B%5D=' . urlencode($path1) . '@' . $rev1 . '&compare%5B%5D=' . urlencode($path2) . '@' . $rev2 . ($manualOrder ? '&manualorder=1'
: '') . '&ignorews=1">' . $lang['IGNOREWHITESPACE'] . '</a>';
} else {
$vars['regardwhitespacelink'] = '<a href="' . $url . 'compare%5B%5D=' . urlencode($path1) . '@' . $rev1 . '&compare%5B%5D=' . urlencode($path2) . '@' . $rev2 . ($manualOrder ? '&manualorder=1'
: '') . '">' . $lang['REGARDWHITESPACE'] . '</a>';
}
if ($rev1 == 0) {
$rev1 = 'HEAD';
}
if ($rev2 == 0) {
$rev2 = 'HEAD';
}
$vars['repname'] = escape($rep->getDisplayName());
$vars['action'] = $lang['PATHCOMPARISON'];
$hidden = '<input type="hidden" name="manualorder" value="1" />';
if ($config->multiViews) {
$hidden .= '<input type="hidden" name="op" value="comp"/>';
} else {
$hidden .= '<input type="hidden" name="repname" value="' . $repname . '" />';
}
$vars['compare_form'] = '<form method="get" action="' . $url . '" id="compare">' . $hidden;
$vars['compare_path1input'] = '<input type="text" size="40" name="compare[0]" value="' . escape($path1) . '" />';
$vars['compare_path2input'] = '<input type="text" size="40" name="compare[1]" value="' . escape($path2) . '" />';
$vars['compare_rev1input'] = '<input type="text" size="5" name="compare_rev[0]" value="' . $rev1 . '" />';
$vars['compare_rev2input'] = '<input type="text" size="5" name="compare_rev[1]" value="' . $rev2 . '" />';
$vars['compare_submit'] = '<input name="comparesubmit" type="submit" value="' . $lang['COMPAREPATHS'] . '" />';
$vars['compare_endform'] = '</form>';
// safe paths are a hack for fixing XSS exploit
$vars['path1'] = escape($path1);
$vars['safepath1'] = escape($path1);
$vars['path2'] = escape($path2);
$vars['safepath2'] = escape($path2);
$vars['rev1'] = $rev1;
$vars['rev2'] = $rev2;
$history1 = $svnrep->getLog($path1, $rev1, $rev1, false, 1);
if (!$history1) {
$vars['error'] = $lang['NOPATH'];
header('HTTP/1.x 404 Not Found', true, 404);
} else {
$history2 = $svnrep->getLog($path2, $rev2, $rev2, false, 1);
if (!$history2) {
$vars['error'] = $lang['NOPATH'];
header('HTTP/1.x 404 Not Found', true, 404);
}
}
// Set variables used for the more recent of the two revisions
$history = ($rev1 >= $rev2 ? $history1 : $history2);
if ($history) {
$logEntry = $history->curEntry;
$vars['rev'] = $logEntry->rev;
$vars['peg'] = $peg;
$vars['date'] = $logEntry->date;
$vars['age'] = datetimeFormatDuration(time() - strtotime($logEntry->date));
$vars['author'] = $logEntry->author;
$vars['log'] = xml_entities($logEntry->msg);
} else {
$vars['warning'] = 'Problem with comparison.';
}
$noinput = empty($path1) || empty($path2);
// Generate the diff listing
$relativePath1 = $path1;
$relativePath2 = $path2;
$svnpath1 = encodepath($svnrep->getSvnPath(str_replace(DIRECTORY_SEPARATOR, '/', $path1)));
$svnpath2 = encodepath($svnrep->getSvnPath(str_replace(DIRECTORY_SEPARATOR, '/', $path2)));
$debug = false;
if (!$noinput) {
$cmd = $config->getSvnCommand() . $rep->svnCredentials() . ' diff ' . ($ignoreWhitespace ? '-x "-w --ignore-eol-style" ' : '') . quote($svnpath1 . '@' . $rev1) . ' ' . quote($svnpath2 . '@' . $rev2);
}
function clearVars()
{
global $ignoreWhitespace, $listing, $index;
if ($ignoreWhitespace && $index > 1) {
$endBlock = false;
$previous = $index - 1;
if ($listing[$previous]['endpath']) {
$endBlock = 'newpath';
} else {
if ($listing[$previous]['enddifflines']) {
$endBlock = 'difflines';
}
}
if ($endBlock !== false) {
// check if block ending at previous contains real diff data
$i = $previous;
$containsOnlyEqualDiff = true;
$addedLines = array();
$removedLines = array();
while ($i >= 0 && !$listing[$i - 1][$endBlock]) {
$diffclass = $listing[$i - 1]['diffclass'];
if ($diffclass !== 'diffadded' && $diffclass !== 'diffdeleted') {
if ($addedLines !== $removedLines) {
$containsOnlyEqualDiff = false;
break;
}
}
if (count($addedLines) > 0 && $addedLines === $removedLines) {
$addedLines = array();
$removedLines = array();
}
if ($diffclass === 'diff') {
$i--;
continue;
}
if ($diffclass === null) {
$containsOnlyEqualDiff = false;
break;;
}
if ($diffclass === 'diffdeleted') {
if (count($addedLines) <= count($removedLines)) {
$containsOnlyEqualDiff = false;
break;;
}
array_unshift($removedLines, $listing[$i - 1]['line']);
$i--;
continue;
}
if ($diffclass === 'diffadded') {
if (count($removedLines) > 0) {
$containsOnlyEqualDiff = false;
break;;
}
array_unshift($addedLines, $listing[$i - 1]['line']);
$i--;
continue;
}
assert(false);
}
if ($containsOnlyEqualDiff) {
$containsOnlyEqualDiff = $addedLines === $removedLines;
}
// remove blocks which only contain diffclass=diff and equal removes and adds
if ($containsOnlyEqualDiff) {
for ($j = $i - 1; $j < $index; $j++) {
unset($listing[$j]);
}
$index = $i - 1;
}
}
}
$listvar = &$listing[$index];
$listvar['newpath'] = null;
$listvar['endpath'] = null;
$listvar['info'] = null;
$listvar['diffclass'] = null;
$listvar['difflines'] = null;
$listvar['enddifflines'] = null;
$listvar['properties'] = null;
}
$vars['success'] = false;
if (!$noinput) {
// TODO: Report warning/error if comparison encounters any problems
if ($diff = popenCommand($cmd, 'r')) {
$listing = array();
$index = 0;
$indiff = false;
$indiffproper = false;
$getLine = true;
$node = null;
$bufferedLine = false;
$vars['success'] = true;
while (!feof($diff)) {
if ($getLine) {
if ($bufferedLine === false) {
$bufferedLine = rtrim(fgets($diff), "\r\n");
}
$newlineR = strpos($bufferedLine, "\r");
$newlineN = strpos($bufferedLine, "\n");
if ($newlineR === false && $newlineN === false) {
$line = $bufferedLine;
$bufferedLine = false;
} else {
$newline = ($newlineR < $newlineN ? $newlineR : $newlineN);
$line = substr($bufferedLine, 0, $newline);
$bufferedLine = substr($bufferedLine, $newline + 1);
}
}
clearVars();
$getLine = true;
if ($debug) {
print 'Line = "' . $line . '"<br />';
}
if ($indiff) {
// If we're in a diff proper, just set up the line
if ($indiffproper) {
if (strlen($line) > 0 && ($line[0] == ' ' || $line[0] == '+' || $line[0] == '-')) {
$subline = escape(toOutputEncoding(substr($line, 1)));
$subline = rtrim($subline, "\n\r");
$subline = ($subline) ? expandTabs($subline) : ' ';
$listvar = &$listing[$index];
$listvar['line'] = $subline;
switch ($line[0]) {
case ' ':
$listvar['diffclass'] = 'diff';
if ($debug) {
print 'Including as diff: ' . $subline . '<br />';
}
break;
case '+':
$listvar['diffclass'] = 'diffadded';
if ($debug) {
print 'Including as added: ' . $subline . '<br />';
}
break;
case '-':
$listvar['diffclass'] = 'diffdeleted';
if ($debug) {
print 'Including as removed: ' . $subline . '<br />';
}
break;
}
$index++;
} else {
if ($line != '\ No newline at end of file') {
$indiffproper = false;
$listing[$index++]['enddifflines'] = true;
$getLine = false;
if ($debug) {
print 'Ending lines<br />';
}
}
}
continue;
}
// Check for the start of a new diff area
if (!strncmp($line, '@@', 2)) {
$pos = strpos($line, '+');
$posline = substr($line, $pos);
$sline = 0;
$eline = 0;
sscanf($posline, '+%d,%d', $sline, $eline);
if ($debug) {
print 'sline = "' . $sline . '", eline = "' . $eline . '"<br />';
}
// Check that this isn't a file deletion
if ($sline == 0 && $eline == 0) {
$line = fgets($diff);
if ($debug) {
print 'Ignoring: "' . $line . '"<br />';
}
while ($line[0] == ' ' || $line[0] == '+' || $line[0] == '-') {
$line = fgets($diff);
if ($debug) {
print 'Ignoring: "' . $line . '"<br />';
}
}
$getLine = false;
if ($debug) {
print 'Unignoring previous - marking as deleted<br />';
}
$listing[$index++]['info'] = $lang['FILEDELETED'];
} else {
$listvar = &$listing[$index];
$listvar['difflines'] = $line;
$sline = 0;
$slen = 0;
$eline = 0;
$elen = 0;
sscanf($line, '@@ -%d,%d +%d,%d @@', $sline, $slen, $eline, $elen);
$listvar['rev1line'] = $sline;
$listvar['rev1len'] = $slen;
$listvar['rev2line'] = $eline;
$listvar['rev2len'] = $elen;
$indiffproper = true;
$index++;
}
continue;
} else {
$indiff = false;
if ($debug) {
print 'Ending diff';
}
}
}
// Check for a new node entry
if (strncmp(trim($line), 'Index: ', 7) == 0) {
// End the current node
if ($node) {
$listing[$index++]['endpath'] = true;
clearVars();
}
$node = trim($line);
$node = substr($node, 7);
if ($node == '' || $node{0} != '/') {
$node = '/' . $node;
}
if (substr($path2, -strlen($node)) === $node) {
$absnode = $path2;
} else {
$absnode = $path2;
if (substr($absnode, -1) == '/') {
$absnode = substr($absnode, 0, -1);
}
$absnode .= $node;
}
$listvar = &$listing[$index];
$listvar['newpath'] = $absnode;
$listvar['fileurl'] = $config->getURL($rep, $absnode, 'file') . 'rev=' . $rev2;
if ($debug) {
echo 'Creating node ' . $node . '<br />';
}
// Skip past the line of ='s
$line = fgets($diff);
if ($debug) {
print 'Skipping: ' . $line . '<br />';
}
// Check for a file addition
$line = fgets($diff);
if ($debug) {
print 'Examining: ' . $line . '<br />';
}
if (strpos($line, '(revision 0)')) {
$listvar['info'] = $lang['FILEADDED'];
}
if (strncmp(trim($line), 'Cannot display:', 15) == 0) {
$index++;
clearVars();
$listing[$index++]['info'] = escape(toOutputEncoding($line));
continue;
}
// Skip second file info
$line = fgets($diff);
if ($debug) {
print 'Skipping: ' . $line . '<br />';
}
$indiff = true;
$index++;
continue;
}
if (strncmp(trim($line), 'Property changes on: ', 21) == 0) {
$propnode = trim($line);
$propnode = substr($propnode, 21);
if ($propnode == '' || $propnode{0} != '/') {
$propnode = '/' . $propnode;
}
if ($debug) {
print 'Properties on ' . $propnode . ' (cur node $ ' . $node . ')';
}
if ($propnode != $node) {
if ($node) {
$listing[$index++]['endpath'] = true;
clearVars();
}
$node = $propnode;
$listing[$index++]['newpath'] = $node;
clearVars();
}
$listing[$index++]['properties'] = true;
clearVars();
if ($debug) {
echo 'Creating node ' . $node . '<br />';
}
// Skip the row of underscores
$line = fgets($diff);
if ($debug) {
print 'Skipping: ' . $line . '<br />';
}
while ($line = trim(fgets($diff))) {
if (version_compare($config->getSubversionVersion(), '1.7.0') >= 0) {
if (!strncmp($line, 'Index: ', 7)) {
break;
}
if (!strncmp($line, '##', 2) || $line == '\ No newline at end of file') {
continue;
}
}
$listing[$index++]['info'] = escape(toOutputEncoding($line));
clearVars();
}
$getLine = false;
continue;
}
// Check for error messages
if (strncmp(trim($line), 'svn: ', 5) == 0) {
$listing[$index++]['info'] = urldecode($line);
$vars['success'] = false;
continue;
}
$listing[$index++]['info'] = escape(toOutputEncoding($line));
}
if ($node) {
clearVars();
$listing[$index++]['endpath'] = true;
}
if ($debug) {
print_r($listing);
}
if (!$rep->hasUnrestrictedReadAccess($relativePath1) || !$rep->hasUnrestrictedReadAccess($relativePath2, false)) {
// check every item for access and remove it if read access is not allowed
$restricted = array();
$inrestricted = false;
foreach ($listing as $i => $item) {
if ($item['newpath'] !== null) {
$newpath = $item['newpath'];
$inrestricted = !$rep->hasReadAccess($newpath, false);
}
if ($inrestricted) {
$restricted[] = $i;
}
if ($item['endpath'] !== null) {
$inrestricted = false;
}
}
foreach ($restricted as $i) {
unset($listing[$i]);
}
if (count($restricted) && !count($listing)) {
$vars['error'] = $lang['NOACCESS'];
checkSendingAuthHeader($rep);
}
}
pclose($diff);
}
}
} else {
header('HTTP/1.x 404 Not Found', true, 404);
}
renderTemplate('compare');