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PhabricatorStorageManagementRenamespaceWorkflow.php
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Created
Wed, Aug 7, 08:26

PhabricatorStorageManagementRenamespaceWorkflow.php
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<?php
final class PhabricatorStorageManagementRenamespaceWorkflow
extends PhabricatorStorageManagementWorkflow {
protected function didConstruct() {
$this
->setName('renamespace')
->setExamples(
'**renamespace** [__options__] '.
'--input __dump.sql__ --from __old__ --to __new__ > __out.sql__')
->setSynopsis(pht('Change the database namespace of a .sql dump file.'))
->setArguments(
array(
array(
'name' => 'input',
'param' => 'file',
'help' => pht('SQL dumpfile to process.'),
),
array(
'name' => 'live',
'help' => pht(
'Generate a live dump instead of processing a file on disk.'),
),
array(
'name' => 'from',
'param' => 'namespace',
'help' => pht('Current database namespace used by dumpfile.'),
),
array(
'name' => 'to',
'param' => 'namespace',
'help' => pht('Desired database namespace for output.'),
),
array(
'name' => 'output',
'param' => 'file',
'help' => pht('Write output directly to a file on disk.'),
),
array(
'name' => 'compress',
'help' => pht('Emit gzipped output instead of plain text.'),
),
array(
'name' => 'overwrite',
'help' => pht(
'With __--output__, write to disk even if the file already '.
'exists.'),
),
));
}
protected function isReadOnlyWorkflow() {
return true;
}
public function didExecute(PhutilArgumentParser $args) {
$console = PhutilConsole::getConsole();
$input = $args->getArg('input');
$is_live = $args->getArg('live');
if (!strlen($input) && !$is_live) {
throw new PhutilArgumentUsageException(
pht(
'Specify the dumpfile to read with "--input", or use "--live" to '.
'generate one automatically.'));
}
$from = $args->getArg('from');
if (!strlen($from)) {
throw new PhutilArgumentUsageException(
pht(
'Specify namespace to rename from with %s.',
'--from'));
}
$to = $args->getArg('to');
if (!strlen($to)) {
throw new PhutilArgumentUsageException(
pht(
'Specify namespace to rename to with %s.',
'--to'));
}
$output_file = $args->getArg('output');
$is_overwrite = $args->getArg('overwrite');
$is_compress = $args->getArg('compress');
if ($is_overwrite) {
if ($output_file === null) {
throw new PhutilArgumentUsageException(
pht(
'The "--overwrite" flag can only be used alongside "--output".'));
}
}
if ($output_file !== null) {
if (Filesystem::pathExists($output_file)) {
if (!$is_overwrite) {
throw new PhutilArgumentUsageException(
pht(
'Output file "%s" already exists. Use "--overwrite" '.
'to overwrite.',
$output_file));
}
}
}
if ($is_live) {
$api = $this->getSingleAPI();
$ref_key = $api->getRef()->getRefKey();
$root = dirname(phutil_get_library_root('phabricator'));
$future = new ExecFuture(
'%R dump --ref %s',
$root.'/bin/storage',
$ref_key);
$lines = new LinesOfALargeExecFuture($future);
} else {
$lines = new LinesOfALargeFile($input);
}
if ($output_file === null) {
$file = fopen('php://stdout', 'wb');
$output_name = pht('stdout');
} else {
if ($is_compress) {
$file = gzopen($output_file, 'wb');
} else {
$file = fopen($output_file, 'wb');
}
$output_name = $output_file;
}
if (!$file) {
throw new Exception(
pht(
'Failed to open output file "%s" for writing.',
$output_name));
}
$name_pattern = preg_quote($from, '@');
$patterns = array(
'use' => '@^(USE `)('.$name_pattern.')(_.*)$@',
'create' => '@^(CREATE DATABASE /\*.*?\*/ `)('.$name_pattern.')(_.*)$@',
);
$found = array_fill_keys(array_keys($patterns), 0);
try {
$matches = null;
foreach ($lines as $line) {
foreach ($patterns as $key => $pattern) {
if (preg_match($pattern, $line, $matches)) {
$line = $matches[1].$to.$matches[3];
$found[$key]++;
}
}
$data = $line."\n";
if ($is_compress) {
$bytes = gzwrite($file, $data);
} else {
$bytes = fwrite($file, $data);
}
if ($bytes !== strlen($data)) {
throw new Exception(
pht(
'Failed to write %d byte(s) to "%s".',
new PhutilNumber(strlen($data)),
$output_name));
}
}
if ($is_compress) {
$ok = gzclose($file);
} else {
$ok = fclose($file);
}
if ($ok !== true) {
throw new Exception(
pht(
'Failed to close file "%s".',
$output_file));
}
} catch (Exception $ex) {
try {
if ($output_file !== null) {
Filesystem::remove($output_file);
}
} catch (Exception $ex) {
// Ignore any exception.
}
throw $ex;
}
// Give the user a chance to catch things if the results are crazy.
$console->writeErr(
pht(
'Adjusted **%s** create statements and **%s** use statements.',
new PhutilNumber($found['create']),
new PhutilNumber($found['use']))."\n");
return 0;
}
}

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