public final function selectWorkflow(&$command, array &$args, ArcanistConfigurationManager $configuration_manager, PhutilConsole $console)
{
// First, try to build a workflow with the exact name provided. We always
// pick an exact match, and do not allow aliases to override it.
$workflow = $this->buildWorkflow($command);
if ($workflow) {
return $workflow;
}
// If the user has an alias, like 'arc alias dhelp diff help', look it up
// and substitute it. We do this only after trying to resolve the workflow
// normally to prevent you from doing silly things like aliasing 'alias'
// to something else.
$aliases = ArcanistAliasWorkflow::getAliases($configuration_manager);
list($new_command, $args) = ArcanistAliasWorkflow::resolveAliases($command, $this, $args, $configuration_manager);
$full_alias = idx($aliases, $command, array());
$full_alias = implode(' ', $full_alias);
// Run shell command aliases.
if (ArcanistAliasWorkflow::isShellCommandAlias($new_command)) {
$shell_cmd = substr($full_alias, 1);
$console->writeLog("[%s: 'arc %s' -> \$ %s]", pht('alias'), $command, $shell_cmd);
if ($args) {
$err = phutil_passthru('%C %Ls', $shell_cmd, $args);
} else {
$err = phutil_passthru('%C', $shell_cmd);
}
exit($err);
}
// Run arc command aliases.
if ($new_command) {
$workflow = $this->buildWorkflow($new_command);
if ($workflow) {
$console->writeLog("[%s: 'arc %s' -> 'arc %s']\n", pht('alias'), $command, $full_alias);
$command = $new_command;
return $workflow;
}
}
$all = array_keys($this->buildAllWorkflows());
// We haven't found a real command or an alias, so try to locate a command
// by unique prefix.
$prefixes = $this->expandCommandPrefix($command, $all);
if (count($prefixes) == 1) {
$command = head($prefixes);
return $this->buildWorkflow($command);
} else {
if (count($prefixes) > 1) {
$this->raiseUnknownCommand($command, $prefixes);
}
}
// We haven't found a real command, alias, or unique prefix. Try similar
// spellings.
$corrected = self::correctCommandSpelling($command, $all, 2);
if (count($corrected) == 1) {
$console->writeErr(pht("(Assuming '%s' is the British spelling of '%s'.)", $command, head($corrected)) . "\n");
$command = head($corrected);
return $this->buildWorkflow($command);
} else {
if (count($corrected) > 1) {
$this->raiseUnknownCommand($command, $corrected);
}
}
$this->raiseUnknownCommand($command);
}