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Code Issues Releases Wiki Activity

Handle "hg pull" return code change between 2.1 and 2.1.1 more gracefully

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Summary:
See <https://github.com/facebook/phabricator/issues/102>. Between Feb 1 and Mar 1, the hg released changed the exit code behavior of "hg pull". This broke us mildly (and a bunch of other applications more severely, which is why it was reverted).

Detect the common case of this (english) and don't fail.

Test Plan: @killermonk, can you try applying this? I'll try to do an upgrade to 2.1 and see if I can also do a proper test.

Reviewers: Makinde, btrahan, killermonk

Reviewed By: btrahan

CC: killermonk, aran, epriestley

Differential Revision: https://secure.phabricator.com/D1948
This commit is contained in:
epriestley 2012-03-19 19:19:48 -07:00
parent 49cc3d9f0d
commit ec736f9c50
1 changed files with 30 additions and 2 deletions
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32
src/applications/repository/daemon/mercurialpull/PhabricatorRepositoryMercurialPullDaemon.php
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@ -1,7 +1,7 @@
<?php
/*
* Copyright 2011 Facebook, Inc.
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -39,7 +39,35 @@ final class PhabricatorRepositoryMercurialPullDaemon
// This is a local command, but needs credentials.
$future = $repository->getRemoteCommandFuture('pull -u');
$future->setCWD($local_path);
$future->resolvex();
try {
$future->resolvex();
} catch (CommandException $ex) {
$err = $ex->getError();
$stdout = $ex->getStdOut();
// NOTE: Between versions 2.1 and 2.1.1, Mercurial changed the behavior
// of "hg pull" to return 1 in case of a successful pull with no changes.
// This behavior has been reverted, but users who updated between Feb 1,
// 2012 and Mar 1, 2012 will have the erroring version. Do a dumb test
// against stdout to check for this possibility.
// See: https://github.com/facebook/phabricator/issues/101/
// NOTE: Mercurial has translated versions, which translate this error
// string. In a translated version, the string will be something else,
// like "aucun changement trouve". There didn't seem to be an easy way
// to handle this (there are hard ways but this is not a common problem
// and only creates log spam, not application failures). Assume English.
// TODO: Remove this once we're far enough in the future that deployment
// of 2.1 is exceedingly rare?
if ($err == 1 && preg_match('/no changes found/', $stdout)) {
return;
} else {
throw $ex;
}
}
}
}