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Code Issues Releases Wiki Activity

Fix Diffusion rendering of SVN files which did not change

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Summary:
Share code with the new PhabricatorDifferenceEngine, which handles diffs with no
changes correctly.

(This isn't the same issue as file moves, but I ran into it while generating a
repro case.)

Test Plan: Previously, changes which didn't change file content (e.g., property
changes) would throw. Now they work.
Reviewed By: tuomaspelkonen
Reviewers: tuomaspelkonen, jungejason, aran
CC: aran, epriestley, tuomaspelkonen
Differential Revision: 698
This commit is contained in:
epriestley 2011-07-20 11:43:44 -07:00
parent ed5c46681d
commit 3eafe9e3bb
3 changed files with 102 additions and 55 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
src/applications/diffusion/query/diff/svn/DiffusionSvnDiffQuery.php
View file

@ -90,24 +90,17 @@ final class DiffusionSvnDiffQuery extends DiffusionDiffQuery {
$futures = array_filter($futures);
foreach (Futures($futures) as $key => $future) {
$futures[$key] = $future->resolvex();
list($stdout) = $future->resolvex();
$futures[$key] = $stdout;
}
$old_data = idx($futures, 'old', '');
$new_data = idx($futures, 'new', '');
$old_tmp = new TempFile();
$new_tmp = new TempFile();
Filesystem::writeFile($old_tmp, $old_data);
Filesystem::writeFile($new_tmp, $new_data);
list($err, $raw_diff) = exec_manual(
'diff -L %s -L %s -U65535 %s %s',
nonempty($old_name, '/dev/universe').' 9999-99-99',
nonempty($new_name, '/dev/universe').' 9999-99-99',
$old_tmp,
$new_tmp);
$engine = new PhabricatorDifferenceEngine();
$engine->setOldName($old_name);
$engine->setNewName($new_name);
$raw_diff = $engine->generateRawDiffFromFileContent($old_data, $new_data);
$parser = new ArcanistDiffParser();
$parser->setDetectBinaryFiles(true);

3
src/applications/diffusion/query/diff/svn/__init__.php
View file

@ -13,9 +13,8 @@ phutil_require_module('phabricator', 'applications/differential/storage/diff');
phutil_require_module('phabricator', 'applications/diffusion/data/pathchange');
phutil_require_module('phabricator', 'applications/diffusion/query/diff/base');
phutil_require_module('phabricator', 'applications/diffusion/query/pathchange/base');
phutil_require_module('phabricator', 'infrastructure/diff/engine');
phutil_require_module('phutil', 'filesystem');
phutil_require_module('phutil', 'filesystem/tempfile');
phutil_require_module('phutil', 'future');
phutil_require_module('phutil', 'future/exec');
phutil_require_module('phutil', 'utils');

135
src/infrastructure/diff/engine/PhabricatorDifferenceEngine.php
View file

@ -25,7 +25,10 @@
*/
final class PhabricatorDifferenceEngine {
private $ignoreWhitespace;
private $oldName;
private $newName;
/* -( Configuring the Engine )--------------------------------------------- */
@ -44,9 +47,100 @@ final class PhabricatorDifferenceEngine {
}
/**
* Set the name to identify the old file with. Primarily cosmetic.
*
* @param string Old file name.
* @return this
* @task config
*/
public function setOldName($old_name) {
$this->oldName = $old_name;
return $this;
}
/**
* Set the name to identify the new file with. Primarily cosmetic.
*
* @param string New file name.
* @return this
* @task config
*/
public function setNewName($new_name) {
$this->newName = $new_name;
return $this;
}
/* -( Generating Diffs )--------------------------------------------------- */
/**
* Generate a raw diff from two raw files. This is a lower-level API than
* @{method:generateChangesetFromFileContent}, but may be useful if you need
* to use a custom parser configuration, as with Diffusion.
*
* @param string Entire previous file content.
* @param string Entire current file content.
* @return string Raw diff between the two files.
* @task diff
*/
public function generateRawDiffFromFileContent($old, $new) {
$options = array();
if ($this->ignoreWhitespace) {
$options[] = '-bw';
}
// Generate diffs with full context.
$options[] = '-U65535';
$old_name = nonempty($this->oldName, '/dev/universe').' 9999-99-99';
$new_name = nonempty($this->newName, '/dev/universe').' 9999-99-99';
$options[] = '-L';
$options[] = $old_name;
$options[] = '-L';
$options[] = $new_name;
$old_tmp = new TempFile();
$new_tmp = new TempFile();
Filesystem::writeFile($old_tmp, $old);
Filesystem::writeFile($new_tmp, $new);
list($err, $diff) = exec_manual(
'/usr/bin/diff %Ls %s %s',
$options,
$old_tmp,
$new_tmp);
if (!$err) {
// This indicates that the two files are the same (or, possibly, the
// same modulo whitespace differences, which is why we can't do this
// check trivially before running `diff`). Build a synthetic, changeless
// diff so that we can still render the raw, unchanged file instead of
// being forced to just say "this file didn't change" since we don't have
// the content.
$entire_file = explode("\n", $old);
foreach ($entire_file as $k => $line) {
$entire_file[$k] = ' '.$line;
}
$len = count($entire_file);
$entire_file = implode("\n", $entire_file);
// This is a bit hacky but the diff parser can handle it.
$diff = "--- {$old_name}\n".
"+++ {$new_name}\n".
"@@ -1,{$len} +1,{$len} @@\n".
$entire_file."\n";
}
return $diff;
}
/**
* Generate an @{class:DifferentialChangeset} from two raw files. This is
* principally useful because you can feed the output to
@ -58,46 +152,7 @@ final class PhabricatorDifferenceEngine {
* @task diff
*/
public function generateChangesetFromFileContent($old, $new) {
$options = array();
if ($this->ignoreWhitespace) {
$options[] = '-bw';
}
// Generate diffs with full context.
$options[] = '-U65535';
$old_tmp = new TempFile();
$new_tmp = new TempFile();
Filesystem::writeFile($old_tmp, $old);
Filesystem::writeFile($new_tmp, $new);
list($err, $diff) = exec_manual(
'/usr/bin/diff %Ls %s %s',
$options,
$old_tmp,
$new_tmp);
if (!strlen($diff)) {
// This indicates that the two files are the same (or, possibly, the
// same modulo whitespace differences, which is why we can't do this
// check trivially before running `diff`). Build a synthetic, changeless
// diff so that we can still render the raw, unchanged file instead of
// being forced to just say "this file didn't change" since we don't have
// the content.
$entire_file = explode("\n", $old);
foreach ($entire_file as $k => $line) {
$entire_file[$k] = ' '.$line;
}
$len = count($entire_file);
$entire_file = implode("\n", $entire_file);
// This is a bit hacky but the diff parser can handle it.
$diff = "--- ignored 9999-99-99\n".
"+++ ignored 9999-99-99\n".
"@@ -1,{$len} +1,{$len} @@\n".
$entire_file."\n";
}
$diff = $this->generateRawDiffFromFileContent($old, $new);
$changes = id(new ArcanistDiffParser())->parseDiff($diff);
$diff = DifferentialDiff::newFromRawChanges($changes);