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Code Issues Releases Wiki Activity

Add parsing for ssh options (-o) which are passed when using GIT v2 wire protocol by git command (SSH transport)

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Summary:
Makes `ssh-connect` compatible with Git v2 wire protocol over SSH

More details about git V2 wire: https://opensource.googleblog.com/2018/05/introducing-git-protocol-version-2.html

`git` command (2.18+) passes extra options (`-o "SendEnv GIT_PROTOCOL"`) to underlying `ssh` command to enable v2 wire protocol (environment variable enabling new protocol).

Phabricator `ssh-connect` command doesn't understand `-o` options and interprets it as host parts hence when you enable git v2 all clones/ls-remotes crash with:
```
#0 ExecFuture::resolvex() called at [<phabricator>/src/applications/repository/storage/PhabricatorRepository.php:525]
#1 PhabricatorRepository::execxRemoteCommand(string, PhutilOpaqueEnvelope) called at [<phabricator>/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php:400]
#2 PhabricatorRepositoryPullEngine::loadGitRemoteRefs(PhabricatorRepository) called at [<phabricator>/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php:343]
#3 PhabricatorRepositoryPullEngine::executeGitUpdate() called at [<phabricator>/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php:126]
#4 PhabricatorRepositoryPullEngine::pullRepositoryWithLock() called at [<phabricator>/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php:40]
#5 PhabricatorRepositoryPullEngine::pullRepository() called at [<phabricator>/src/applications/repository/management/PhabricatorRepositoryManagementUpdateWorkflow.php:59]
#6 PhabricatorRepositoryManagementUpdateWorkflow::execute(PhutilArgumentParser) called at [<phutil>/src/parser/argument/PhutilArgumentParser.php:441]
#7 PhutilArgumentParser::parseWorkflowsFull(array) called at [<phutil>/src/parser/argument/PhutilArgumentParser.php:333]
#8 PhutilArgumentParser::parseWorkflows(array) called at [<phabricator>/scripts/repository/manage_repositories.php:22]
COMMAND
git ls-remote '********'
STDOUT
(empty)
STDERR
ssh: Could not resolve hostname -o: Name or service not known
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
at [<phutil>/src/future/exec/ExecFuture.php:369]
```

Test Plan:
How to reproduce:
1. add repository to Phabricator which is accessed via `ssh`
2. Use git 2.18+
3. Enable wire protocol in `/etc/gitconfig`:
```
[protocol]
    version = 2
```
4. Try refreshing repository: `phabricator/bin/repository update somecallsing`
5. Repository update fails with `ssh: Could not resolve hostname -o: Name or service not known`

after this changes - updates will succeed

Reviewers: epriestley, Pawka, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D19542
This commit is contained in:
Arturas Moskvinas 2018-08-01 14:42:52 +03:00
parent e72296f927
commit 4c09e88c95
1 changed files with 27 additions and 0 deletions
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27
scripts/ssh/ssh-connect.php
View file

@ -27,7 +27,15 @@ $args->parsePartial(
'param' => pht('port'),
'help' => pht('Port number to connect to.'),
),
array(
'name' => 'options',
'short' => 'o',
'param' => pht('options'),
'repeat' => true,
'help' => pht('SSH options.'),
),
));
$unconsumed_argv = $args->getUnconsumedArgumentVector();
if (function_exists('pcntl_signal')) {
@ -113,6 +121,25 @@ if ($port) {
$arguments[] = $port;
}
$options = $args->getArg('options');
$allowed_ssh_options = array('SendEnv=GIT_PROTOCOL');
if (!empty($options)) {
foreach ($options as $option) {
if (array_search($option, $allowed_ssh_options) !== false) {
$pattern[] = '-o %s';
$arguments[] = $option;
} else {
throw new Exception(
pht(
'Disallowed ssh option "%s" given with "-o". '.
'Allowed options are: %s.',
$option,
implode(', ', $allowed_ssh_options)));
}
}
}
$pattern[] = '--';
$pattern[] = '%s';