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Don't try to download diffs-of-diffs

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Summary:
Ref T1715. When the user clicks "Download Raw Diff" in Differential, we try to build a diff of exactly what they're seeing. However:

  - This doesn't work if any of the changes have multiple hunks, and fixing it seems hard.
  - I suspect this diff is never actually useful anyway? And probably kind of confusing in the best case. You can't really apply it to anyhting, since you'd have to apply another diff first.

Instead, just build the right-side diff, which should align well with user expectation and doesn't suffer from the multi-hunk bug.

Some day, we could maybe add some of the fancy options in T1715.

See: <https://github.com/facebook/phabricator/issues/461>

Test Plan: Downloaded a multi-hunk diff, got the original back and applied it cleanly.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1715

Differential Revision: https://secure.phabricator.com/D7694
This commit is contained in:
epriestley 2013-12-04 14:39:07 -08:00
parent b111bc039d
commit ff4e965c90
1 changed files with 1 additions and 32 deletions
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33
src/applications/differential/controller/DifferentialRevisionViewController.php
View file

@ -863,43 +863,12 @@ final class DifferentialRevisionViewController extends DifferentialController {
$viewer = $this->getRequest()->getUser();
$engine = new PhabricatorDifferenceEngine();
$generated_changesets = array();
foreach ($changesets as $changeset) {
$changeset->attachHunks($changeset->loadHunks());
$right = $changeset->makeNewFile();
$choice = $changeset;
$vs = idx($vs_map, $changeset->getID());
if ($vs == -1) {
$left = $right;
$right = $changeset->makeOldFile();
} else if ($vs) {
$choice = $vs_changeset = $vs_changesets[$vs];
$vs_changeset->attachHunks($vs_changeset->loadHunks());
$left = $vs_changeset->makeNewFile();
} else {
$left = $changeset->makeOldFile();
}
$synthetic = $engine->generateChangesetFromFileContent(
$left,
$right);
if (!$synthetic->getAffectedLineCount()) {
$filetype = $choice->getFileType();
if ($filetype == DifferentialChangeType::FILE_TEXT ||
$filetype == DifferentialChangeType::FILE_SYMLINK) {
continue;
}
}
$choice->attachHunks($synthetic->getHunks());
$generated_changesets[] = $choice;
}
$diff = new DifferentialDiff();
$diff->attachChangesets($generated_changesets);
$diff->attachChangesets($changesets);
$raw_changes = $diff->buildChangesList();
$changes = array();
foreach ($raw_changes as $changedict) {