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Bachir Soussi Chiadmi
2015-04-08 11:40:19 +02:00
commit 1bc61b12ad
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sites/all/modules/drush/includes/.gitignore vendored Normal file
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table.inc

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sites/all/modules/drush/includes/backend.inc Normal file
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<?php
/**
* @file Drush backend API
*
* When a drush command is called with the --backend option,
* it will buffer all output, and instead return a JSON encoded
* string containing all relevant information on the command that
* was just executed.
*
* Through this mechanism, it is possible for Drush commands to
* invoke each other.
*
* There are many cases where a command might wish to call another
* command in its own process, to allow the calling command to
* intercept and act on any errors that may occur in the script that
* was called.
*
* A simple example is if there exists an 'update' command for running
* update.php on a specific site. The original command might download
* a newer version of a module for installation on a site, and then
* run the update script in a separate process, so that in the case
* of an error running a hook_update_n function, the module can revert
* to a previously made database backup, and the previously installed code.
*
* By calling the script in a separate process, the calling script is insulated
* from any error that occurs in the called script, to the level that if a
* php code error occurs (ie: misformed file, missing parenthesis, whatever),
* it is still able to reliably handle any problems that occur.
*
* This is nearly a RESTful API. @see http://en.wikipedia.org/wiki/REST
*
* Instead of :
* http://[server]/[apipath]/[command]?[arg1]=[value1],[arg2]=[value2]
*
* It will call :
* [apipath] [command] --[arg1]=[value1] --[arg2]=[value2] --backend
*
* [apipath] in this case will be the path to the drush.php file.
* [command] is the command you would call, for instance 'status'.
*
* GET parameters will be passed as options to the script.
* POST parameters will be passed to the script as a JSON encoded associative array over STDIN.
*
* Because of this standard interface, Drush commands can also be executed on
* external servers through SSH pipes, simply by prepending, 'ssh username@server.com'
* in front of the command.
*
* If the key-based ssh authentication has been set up between the servers,
* this will just work. By default, drush is configured to disallow password
* authentication; if you would like to enter a password for every connection,
* then in your drushrc.php file, set $options['ssh-options'] so that it does NOT
* include '-o PasswordAuthentication=no'. See examples/example.drushrc.php.
*
* The results from backend API calls can be fetched via a call to
* drush_backend_get_result().
*/
/**
* Identify the JSON encoded output from a command.
*/
define('DRUSH_BACKEND_OUTPUT_DELIMITER', 'DRUSH_BACKEND_OUTPUT_START>>>%s<<<DRUSH_BACKEND_OUTPUT_END');
function drush_backend_set_result($value) {
if (drush_get_context('DRUSH_BACKEND')) {
drush_set_context('BACKEND_RESULT', $value);
}
}
/**
* Retrieves the results from the last call to backend_invoke.
*
* @returns array
* An associative array containing information from the last
* backend invoke. The keys in the array include:
*
* - output: This item contains the textual output of
* the command that was executed.
* - object: Contains the PHP object representation of the
* result of the command.
* - self: The self object contains the alias record that was
* used to select the bootstrapped site when the command was
* executed.
* - error_status: This item returns the error status for the
* command. Zero means "no error".
* - log: The log item contains an array of log messages from
* the command execution ordered chronologically. Each log
* entery is an associative array. A log entry contains
* following items:
* o type: The type of log entry, such as 'notice' or 'warning'
* o message: The log message
* o timestamp: The time that the message was logged
* o memory: Available memory at the time that the message was logged
* o error: The error code associated with the log message
* (only for log entries whose type is 'error')
* - error_log: The error_log item contains another representation
* of entries from the log. Only log entries whose 'error' item
* is set will appear in the error log. The error log is an
* associative array whose key is the error code, and whose value
* is an array of messages--one message for every log entry with
* the same error code.
* - context: The context item contains a representation of all option
* values that affected the operation of the command, including both
* the command line options, options set in a drushrc.php configuration
* files, and options set from the alias record used with the command.
*/
function drush_backend_get_result() {
return drush_get_context('BACKEND_RESULT');
}
function drush_backend_output() {
$data = array();
$data['output'] = ob_get_contents();
ob_end_clean();
$result_object = drush_backend_get_result();
if (isset($result_object)) {
$data['object'] = $result_object;
}
$error = drush_get_error();
$data['error_status'] = ($error) ? $error : DRUSH_SUCCESS;
$data['log'] = drush_get_log(); // Append logging information
// The error log is a more specific version of the log, and may be used by calling
// scripts to check for specific errors that have occurred.
$data['error_log'] = drush_get_error_log();
// If there is a @self record, then include it in the result
$self_record = drush_sitealias_get_record('@self');
if (!empty($self_record)) {
$site_context = drush_get_context('site', array());
unset($site_context['config-file']);
unset($site_context['context-path']);
unset($self_record['loaded-config']);
unset($self_record['#name']);
$data['self'] = array_merge($site_context, $self_record);
}
// Return the options that were set at the end of the process.
$data['context'] = drush_get_merged_options();
if (!drush_get_context('DRUSH_QUIET')) {
printf(DRUSH_BACKEND_OUTPUT_DELIMITER, json_encode($data));
}
}
/**
* Parse output returned from a Drush command.
*
* @param string
* The output of a drush command
* @param integrate
* Integrate the errors and log messages from the command into the current process.
*
* @return
* An associative array containing the data from the external command, or the string parameter if it
* could not be parsed successfully.
*/
function drush_backend_parse_output($string, $integrate = TRUE) {
$regex = sprintf(DRUSH_BACKEND_OUTPUT_DELIMITER, '(.*)');
preg_match("/$regex/s", $string, $match);
if ($match[1]) {
// we have our JSON encoded string
$output = $match[1];
// remove the match we just made and any non printing characters
$string = trim(str_replace(sprintf(DRUSH_BACKEND_OUTPUT_DELIMITER, $match[1]), '', $string));
}
if ($output) {
$data = json_decode($output, TRUE);
if (is_array($data)) {
if ($integrate) {
_drush_backend_integrate($data);
}
return $data;
}
}
return $string;
}
/**
* Integrate log messages and error statuses into the current process.
*
* Output produced by the called script will be printed, errors will be set
* and log messages will be logged locally.
*
* @param data
* The associative array returned from the external command.
*/
function _drush_backend_integrate($data) {
if (is_array($data['log'])) {
foreach($data['log'] as $log) {
$message = is_array($log['message']) ? implode("\n", $log['message']) : $log['message'];
if (!is_null($log['error'])) {
drush_set_error($log['error'], $message);
}
else {
drush_log($message, $log['type']);
}
}
}
// Output will either be printed, or buffered to the drush_backend_output command.
if (drush_cmp_error('DRUSH_APPLICATION_ERROR') && !empty($data['output'])) {
drush_set_error("DRUSH_APPLICATION_ERROR", dt("Output from failed command :\n !output", array('!output' => $data['output'])));
}
else {
print ($data['output']);
}
}
/**
* Call an external command using proc_open.
*
* @param cmd
* The command to execute. This command already needs to be properly escaped.
* @param data
* An associative array that will be JSON encoded and passed to the script being called.
* Objects are not allowed, as they do not json_decode gracefully.
*
* @return
* False if the command could not be executed, or did not return any output.
* If it executed successfully, it returns an associative array containing the command
* called, the output of the command, and the error code of the command.
*/
function _drush_proc_open($cmd, $data = NULL, $context = NULL) {
$descriptorspec = array(
0 => array("pipe", "r"), // stdin is a pipe that the child will read from
1 => array("pipe", "w"), // stdout is a pipe that the child will write to
2 => array("pipe", "w") // stderr is a pipe the child will write to
);
if (drush_get_context('DRUSH_SIMULATE')) {
drush_print('proc_open: ' . $cmd);
return FALSE;
}
$process = proc_open($cmd, $descriptorspec, $pipes, null, null, array('context' => $context));
if (is_resource($process)) {
if ($data) {
fwrite($pipes[0], json_encode($data)); // pass the data array in a JSON encoded string
}
$info = stream_get_meta_data($pipes[1]);
stream_set_blocking($pipes[1], TRUE);
stream_set_timeout($pipes[1], 1);
$string = '';
while (!feof($pipes[1]) && !$info['timed_out']) {
$string .= fgets($pipes[1], 4096);
$info = stream_get_meta_data($pipes[1]);
flush();
};
$info = stream_get_meta_data($pipes[2]);
stream_set_blocking($pipes[2], TRUE);
stream_set_timeout($pipes[2], 1);
while (!feof($pipes[2]) && !$info['timed_out']) {
$string .= fgets($pipes[2], 4096);
$info = stream_get_meta_data($pipes[2]);
flush();
};
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
$code = proc_close($process);
return array('cmd' => $cmd, 'output' => $string, 'code' => $code);
}
return FALSE;
}
/**
* Invoke a drush backend command.
*
* @param command
* A defined drush command such as 'cron', 'status' or any of the available ones such as 'drush pm'.
* @param data
* Optional. An array containing options to pass to the call. Common options would be 'uri' if you want to call a command
* on a different site, or 'root', if you want to call a command using a different Drupal installation.
* Array items with a numeric key are treated as optional arguments to the command.
* @param method
* Optional. Defaults to 'GET'.
* If this parameter is set to 'POST', the $data array will be passed to the script being called as a JSON encoded string over
* the STDIN pipe of that process. This is preferable if you have to pass sensitive data such as passwords and the like.
* For any other value, the $data array will be collapsed down into a set of command line options to the script.
* @param integrate
* Optional. Defaults to TRUE.
* If TRUE, any error statuses or log messages will be integrated into the current process. This might not be what you want,
* if you are writing a command that operates on multiple sites.
* @param drush_path
* Optional. Defaults to the current drush.php file on the local machine, and
* to simply 'drush' (the drush script in the current PATH) on remote servers.
* You may also specify a different drush.php script explicitly. You will need
* to set this when calling drush on a remote server if 'drush' is not in the
* PATH on that machine.
* @param hostname
* Optional. A remote host to execute the drush command on.
* @param username
* Optional. Defaults to the current user. If you specify this, you can choose which module to send.
*
* @deprecated Command name includes arguments, and these are not quote-escaped in any way.
* @see drush_invoke_process("@self", $command, array($arg1, $arg2, ...), $data) for a better option.
*
* @return
* If the command could not be completed successfully, FALSE.
* If the command was completed, this will return an associative array containing the data from drush_backend_output().
*/
function drush_backend_invoke($command, $data = array(), $method = 'GET', $integrate = TRUE, $drush_path = NULL, $hostname = NULL, $username = NULL) {
$args = explode(" ", $command);
$command = array_shift($args);
return drush_backend_invoke_args($command, $args, $data, $method, $integrate, $drush_path, $hostname, $username);
}
/**
* A variant of drush_backend_invoke() which specifies command and arguments separately.
*
* @deprecated; do not call directly.
* @see drush_invoke_process("@self", $command, $args, $data) for a better option.
*/
function drush_backend_invoke_args($command, $args, $data = array(), $method = 'GET', $integrate = TRUE, $drush_path = NULL, $hostname = NULL, $username = NULL, $ssh_options = NULL) {
$cmd = _drush_backend_generate_command($command, $args, $data, $method, $drush_path, $hostname, $username, $ssh_options);
return _drush_backend_invoke($cmd, $data, array_key_exists('#integrate', $data) ? $data['#integrate'] : $integrate);
}
/**
* Execute a new local or remote command in a new process.
*
* @param site_record
* An array containing information used to generate the command.
* 'remote-host'
* Optional. A remote host to execute the drush command on.
* 'remote-user'
* Optional. Defaults to the current user. If you specify this, you can choose which module to send.
* 'ssh-options'
* Optional. Defaults to "-o PasswordAuthentication=no"
* 'path-aliases'
* Optional; contains paths to folders and executables useful to the command.
* '%drush-script'
* Optional. Defaults to the current drush.php file on the local machine, and
* to simply 'drush' (the drush script in the current PATH) on remote servers.
* You may also specify a different drush.php script explicitly. You will need
* to set this when calling drush on a remote server if 'drush' is not in the
* PATH on that machine.
* @param command
* A defined drush command such as 'cron', 'status' or any of the available ones such as 'drush pm'.
* @param args
* An array of arguments for the command.
* @param data
* Optional. An array containing options to pass to the remote script.
* Array items with a numeric key are treated as optional arguments to the command.
* This parameter is a reference, as any options that have been represented as either an option, or an argument will be removed.
* This allows you to pass the left over options as a JSON encoded string, without duplicating data.
* @param method
* Optional. Defaults to 'GET'.
* If this parameter is set to 'POST', the $data array will be passed to the script being called as a JSON encoded string over
* the STDIN pipe of that process. This is preferable if you have to pass sensitive data such as passwords and the like.
* For any other value, the $data array will be collapsed down into a set of command line options to the script.
* @param integrate
* Optional. Defaults to TRUE.
* If TRUE, any error statuses or log messages will be integrated into the current process. This might not be what you want,
* if you are writing a command that operates on multiple sites.
*
* @return
* A text string representing a fully escaped command.
*
* @deprecated; do not call directly.
* @see drush_invoke_process($site_record, $command, $args, $data) for a better option.
*/
function drush_backend_invoke_sitealias($site_record, $command, $args, $data = array(), $method = 'GET', $integrate = TRUE) {
$cmd = _drush_backend_generate_command_sitealias($site_record, $command, $args, $data, $method);
return _drush_backend_invoke($cmd, $data, array_key_exists('#integrate', $data) ? $data['#integrate'] : $integrate);
}
/**
* Create a new pipe with proc_open, and attempt to parse the output.
*
* We use proc_open instead of exec or others because proc_open is best
* for doing bi-directional pipes, and we need to pass data over STDIN
* to the remote script.
*
* Exec also seems to exhibit some strangeness in keeping the returned
* data intact, in that it modifies the newline characters.
*
* @param cmd
* The complete command line call to use.
* @param data
* An associative array to pass to the remote script.
* @param integrate
* Integrate data from remote script with local process.
*
* @return
* If the command could not be completed successfully, FALSE.
* If the command was completed, this will return an associative array containing the data from drush_backend_output().
*/
function _drush_backend_invoke($cmd, $data = null, $integrate = TRUE) {
drush_log(dt('Running: !cmd', array('!cmd' => $cmd)), 'command');
if (array_key_exists('#interactive', $data)) {
drush_log(dt("executing !cmd", array('!cmd' => $cmd)));
return drush_op_system($cmd);
}
else {
$proc = _drush_proc_open($cmd, $data);
if (($proc['code'] == DRUSH_APPLICATION_ERROR) && $integrate) {
drush_set_error('DRUSH_APPLICATION_ERROR', dt("The external command could not be executed due to an application error."));
}
if ($proc['output']) {
$values = drush_backend_parse_output($proc['output'], $integrate);
if (is_array($values)) {
return $values;
}
else {
return drush_set_error('DRUSH_FRAMEWORK_ERROR', dt("The command could not be executed successfully (returned: !return, code: %code)", array("!return" => $proc['output'], "%code" => $proc['code'])));
}
}
}
return FALSE;
}
/**
* Generate a command to execute.
*
* @param command
* A defined drush command such as 'cron', 'status' or any of the available ones such as 'drush pm'.
* @param args
* An array of arguments for the command.
* @param data
* Optional. An array containing options to pass to the remote script.
* Array items with a numeric key are treated as optional arguments to the command.
* This parameter is a reference, as any options that have been represented as either an option, or an argument will be removed.
* This allows you to pass the left over options as a JSON encoded string, without duplicating data.
* @param method
* Optional. Defaults to 'GET'.
* If this parameter is set to 'POST', the $data array will be passed to the script being called as a JSON encoded string over
* the STDIN pipe of that process. This is preferable if you have to pass sensitive data such as passwords and the like.
* For any other value, the $data array will be collapsed down into a set of command line options to the script.
* @param drush_path
* Optional. Defaults to the current drush.php file on the local machine, and
* to simply 'drush' (the drush script in the current PATH) on remote servers.
* You may also specify a different drush.php script explicitly. You will need
* to set this when calling drush on a remote server if 'drush' is not in the
* PATH on that machine.
* @param hostname
* Optional. A remote host to execute the drush command on.
* @param username
* Optional. Defaults to the current user. If you specify this, you can choose which module to send.
*
* @return
* A text string representing a fully escaped command.
*
* @deprecated Is not as flexible as recommended command. @see _drush_backend_generate_command_sitealias().
*/
function _drush_backend_generate_command($command, $args, &$data, $method = 'GET', $drush_path = null, $hostname = null, $username = null, $ssh_options = NULL) {
return _drush_backend_generate_command_sitealias(
array(
'remote-host' => $hostname,
'remote-user' => $username,
'ssh-options' => $ssh_options,
'path-aliases' => array(
'%drush-script' => $drush_path,
),
), $command, $args, $data, $method);
}
/**
* Generate a command to execute.
*
* @param site_record
* An array containing information used to generate the command.
* 'remote-host'
* Optional. A remote host to execute the drush command on.
* 'remote-user'
* Optional. Defaults to the current user. If you specify this, you can choose which module to send.
* 'ssh-options'
* Optional. Defaults to "-o PasswordAuthentication=no"
* 'path-aliases'
* Optional; contains paths to folders and executables useful to the command.
* '%drush-script'
* Optional. Defaults to the current drush.php file on the local machine, and
* to simply 'drush' (the drush script in the current PATH) on remote servers.
* You may also specify a different drush.php script explicitly. You will need
* to set this when calling drush on a remote server if 'drush' is not in the
* PATH on that machine.
* @param command
* A defined drush command such as 'cron', 'status' or any of the available ones such as 'drush pm'.
* @param args
* An array of arguments for the command.
* @param data
* Optional. An array containing options to pass to the remote script.
* Array items with a numeric key are treated as optional arguments to the command.
* This parameter is a reference, as any options that have been represented as either an option, or an argument will be removed.
* This allows you to pass the left over options as a JSON encoded string, without duplicating data.
* @param method
* Optional. Defaults to 'GET'.
* If this parameter is set to 'POST', the $data array will be passed to the script being called as a JSON encoded string over
* the STDIN pipe of that process. This is preferable if you have to pass sensitive data such as passwords and the like.
* For any other value, the $data array will be collapsed down into a set of command line options to the script.
*
* @return
* A text string representing a fully escaped command.
*/
function _drush_backend_generate_command_sitealias($site_record, $command, $args, &$data, $method = 'GET') {
$drush_path = null;
$hostname = array_key_exists('remote-host', $site_record) ? $site_record['remote-host'] : null;
$username = array_key_exists('remote-user', $site_record) ? $site_record['remote-user'] : null;
$ssh_options = array_key_exists('ssh-options', $site_record) ? $site_record['ssh-options'] : null;
$os = drush_os($site_record);
$drush_path = NULL;
if (array_key_exists('path-aliases', $site_record)) {
if (array_key_exists('%drush-script', $site_record['path-aliases'])) {
$drush_path = $site_record['path-aliases']['%drush-script'];
}
}
if (drush_is_local_host($hostname)) {
$hostname = null;
}
$drush_path = !is_null($drush_path) ? $drush_path : (is_null($hostname) ? DRUSH_COMMAND : 'drush'); // Call own drush.php file on local machines, or 'drush' on remote machines.
$data['root'] = array_key_exists('root', $data) ? $data['root'] : drush_get_context('DRUSH_DRUPAL_ROOT');
$data['uri'] = array_key_exists('uri', $data) ? $data['uri'] : drush_get_context('DRUSH_URI');
$option_str = _drush_backend_argument_string($data, $method);
foreach ($data as $key => $arg) {
if (is_numeric($key)) {
$args[] = $arg;
unset($data[$key]);
}
}
foreach ($args as $arg) {
$command .= ' ' . drush_escapeshellarg($arg);
}
$interactive = ' ' . (empty($data['#interactive']) ? '' : ' > `tty`') . ' 2>&1';
// @TODO: Implement proper multi platform / multi server support.
$cmd = escapeshellcmd($drush_path) . " " . $option_str . " " . $command . (empty($data['#interactive']) ? " --backend" : "");
if (!is_null($hostname)) {
$username = (!is_null($username)) ? drush_escapeshellarg($username) . "@" : '';
$ssh_options = (!is_null($ssh_options)) ? $ssh_options : drush_get_option('ssh-options', "-o PasswordAuthentication=no");
$cmd = "ssh " . $ssh_options . " " . $username . drush_escapeshellarg($hostname) . " " . drush_escapeshellarg($cmd . ' 2>&1', $os) . $interactive;
}
else {
$cmd .= $interactive;
}
return $cmd;
}
/**
* A small utility function to call a drush command in the background.
*
* Takes the same parameters as drush_backend_invoke, but forks a new
* process by calling the command using system() and adding a '&' at the
* end of the command.
*
* Use this if you don't care what the return value of the command may be.
*/
function drush_backend_fork($command, $data, $drush_path = null, $hostname = null, $username = null) {
$data['quiet'] = TRUE;
$args = explode(" ", $command);
$command = array_shift($args);
$cmd = "(" . _drush_backend_generate_command($command, $args, $data, 'GET', $drush_path, $hostname, $username) . ' &) > /dev/null';
drush_op_system($cmd);
}
/**
* Map the options to a string containing all the possible arguments and options.
*
* @param data
* Optional. An array containing options to pass to the remote script.
* Array items with a numeric key are treated as optional arguments to the command.
* This parameter is a reference, as any options that have been represented as either an option, or an argument will be removed.
* This allows you to pass the left over options as a JSON encoded string, without duplicating data.
* @param method
* Optional. Defaults to 'GET'.
* If this parameter is set to 'POST', the $data array will be passed to the script being called as a JSON encoded string over
* the STDIN pipe of that process. This is preferable if you have to pass sensitive data such as passwords and the like.
* For any other value, the $data array will be collapsed down into a set of command line options to the script.
* @return
* A properly formatted and escaped set of arguments and options to append to the drush.php shell command.
*/
function _drush_backend_argument_string(&$data, $method = 'GET') {
// Named keys are options, numerically indexed keys are optional arguments.
$args = array();
$options = array();
foreach ($data as $key => $value) {
if (!is_array($value) && !is_object($value) && !is_null($value) && ($value != '')) {
if (is_numeric($key)) {
$args[$key] = $value;
}
elseif (substr($key,0,1) != '#') {
$options[$key] = $value;
}
}
}
if (array_key_exists('backend', $data)) {
unset($data['backend']);
}
$special = array('root', 'uri'); // These should be in the command line.
$option_str = '';
foreach ($options as $key => $value) {
if (($method != 'POST') || (($method == 'POST') && in_array($key, $special))) {
$option_str .= _drush_escape_option($key, $value);
unset($data[$key]); // Remove items in the data array.
}
}
return $option_str;
}
/**
* Return a properly formatted and escaped command line option
*
* @param key
* The name of the option.
* @param value
* The value of the option.
*
* @return
* If the value is set to TRUE, this function will return " --key"
* In other cases it will return " --key='value'"
*/
function _drush_escape_option($key, $value = TRUE) {
if ($value !== TRUE) {
$option_str = " --$key=" . escapeshellarg($value);
}
else {
$option_str = " --$key";
}
return $option_str;
}
/**
* Read options fron STDIN during POST requests.
*
* This function will read any text from the STDIN pipe,
* and attempts to generate an associative array if valid
* JSON was received.
*
* @return
* An associative array of options, if successfull. Otherwise FALSE.
*/
function _drush_backend_get_stdin() {
$fp = fopen('php://stdin', 'r');
stream_set_blocking($fp, FALSE);
$string = stream_get_contents($fp);
fclose($fp);
if (trim($string)) {
return json_decode($string, TRUE);
}
return FALSE;
}

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<?php
/**
* @file
* Drush batch API.
*
* This file contains a fork of the Drupal Batch API that has been drastically
* simplified and tailored to Drush's unique use case.
*
* The existing API is very targeted towards environments that are web accessible,
* and would frequently attempt to redirect the user which would result in the
* drush process being completely destroyed with no hope of recovery.
*
* While the original API does offer a 'non progressive' mode which simply
* calls each operation in sequence within the current process, in most
* implementations (Drupal 5 and 6), it would still attempt to redirect
* unless very specific conditions were met.
*
* When operating in 'non progressive' mode, Drush would experience the problems
* that the API was written to solve in the first place, specifically that processes
* would exceed the available memory and exit with an error.
*
* Each major release of Drupal has also had slightly different implementations
* of the batch API, and this provides a uniform interface to all of these
* implementations.
*
*/
/**
* Process a Drupal batch by spawning multiple Drush processes.
*
* This function will include the correct batch engine for the current
* major version of Drupal, and will make use of the drush_backend_invoke
* system to spawn multiple worker threads to handle the processing of
* the current batch, while keeping track of available memory.
*
* The batch system will process as many batch sets as possible until
* the entire batch has been completed or half of the available memory
* has been used.
*
* This function is a drop in replacement for the existing batch_process()
* function of Drupal.
*
* @param command
* The command to call for the back end process. By default this will be
* the 'backend-process' command, but some commands such as updatedb will
* have special initialization requirements, and will need to define and
* use their own command.
*
*/
function drush_backend_batch_process($command = 'batch-process') {
drush_include_engine('drupal', 'batch', drush_drupal_major_version());
_drush_backend_batch_process($command);
}
/**
* Process sets from the specified batch.
*
* This function is called by the worker process that is spawned by the
* drush_backend_batch_process function.
*
* The command called needs to call this function after it's special bootstrap
* requirements have been taken care of.
*/
function drush_batch_command($id) {
include_once('includes/batch.inc');
drush_include_engine('drupal', 'batch', drush_drupal_major_version());
_drush_batch_command($id);
}

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<?php
/**
* @file
* The Drush context API implementation.
*
* This API acts as a storage mechanism for all options, arguments and
* configuration settings that are loaded into drush.
*
* This API also acts as an IPC mechanism between the different drush commands,
* and provides protection from accidentally overriding settings that are
* needed by other parts of the system.
*
* It also avoids the necessity to pass references through the command chain
* and allows the scripts to keep track of whether any settings have changed
* since the previous execution.
*
* This API defines several contexts that are used by default.
*
* Argument contexts :
* These contexts are used by Drush to store information on the command.
* They have their own access functions in the forms of
* drush_set_arguments(), drush_get_arguments(), drush_set_command(),
* drush_get_command().
*
* command : The drush command being executed.
* arguments : Any additional arguments that were specified.
*
* Setting contexts :
* These contexts store options that have been passed to the drush.php
* script, either through the use of any of the config files, directly from
* the command line through --option='value' or through a JSON encoded string
* passed through the STDIN pipe.
*
* These contexts are accessible through the drush_get_option() and
* drush_set_option() functions. See drush_context_names() for a description
* of all of the contexts.
*
* Drush commands may also choose to save settings for a specific context to
* the matching configuration file through the drush_save_config() function.
*/
/**
* Return a list of the valid drush context names.
*
* These context names are carefully ordered from
* highest to lowest priority.
*
* These contexts are evaluated in a certain order, and the highest priority value
* is returned by default from drush_get_option. This allows scripts to check whether
* an option was different before the current execution.
*
* Specified by the script itself :
* process : Generated in the current process.
* cli : Passed as --option=value to the command line.
* stdin : Passed as a JSON encoded string through stdin.
* specific : Defined in a command-specific option record, and
* set in the command context whenever that command is used.
* alias : Defined in an alias record, and set in the
* alias context whenever that alias is used.
*
* Specified by config files :
* custom : Loaded from the config file specified by --config or -c
* site : Loaded from the drushrc.php file in the Drupal site directory.
* drupal : Loaded from the drushrc.php file in the Drupal root directory.
* user : Loaded from the drushrc.php file in the user's home directory.
* home.drush Loaded from the drushrc.php file in the $HOME/.drush directory.
* system : Loaded from the drushrc.php file in the system's $PREFIX/etc/drush directory.
* drush : Loaded from the drushrc.php file in the same directory as drush.php.
*
* Specified by the script, but has the lowest priority :
* default : The script might provide some sensible defaults during init.
*/
function drush_context_names() {
static $contexts = array(
'process', 'cli', 'stdin', 'specific', 'alias',
'custom', 'site', 'drupal', 'user', 'home.drush', 'system',
'drush', 'default');
return $contexts;
}
/**
* Return a list of possible drushrc file locations.
*
* @context
* A valid drush context from drush_context_names().
* @prefix
* Optional. Specify a prefix to prepend to ".drushrc.php" when looking
* for config files. Most likely used by contrib commands.
* @return
* An associative array containing possible config files to load
* The keys are the 'context' of the files, the values are the file
* system locations.
*/
function _drush_config_file($context, $prefix = NULL) {
$configs = array();
$config_file = $prefix ? $prefix . '.' . 'drushrc.php' : 'drushrc.php';
// Did the user explicitly specify a config file?
if ($config = drush_get_option(array('c', 'config'))) {
if (is_dir($config)) {
$config = $config . '/drushrc.php';
}
$configs['custom'] = $config;
}
if ($site_path = drush_get_context('DRUSH_DRUPAL_SITE_ROOT')) {
$configs['site'] = $site_path . "/" . $config_file;
}
if ($drupal_root = drush_get_context('DRUSH_DRUPAL_ROOT')) {
$configs['drupal'] = $drupal_root . '/' . $config_file;
}
// in the user home directory
if (!is_null(drush_server_home())) {
$configs['user'] = drush_server_home() . '/.' . $config_file;
}
// in $HOME/.drush directory
if (!is_null(drush_server_home())) {
$configs['home.drush'] = drush_server_home() . '/.drush/' . $config_file;
}
// In the system wide configuration folder.
$configs['system'] = drush_get_context('ETC_PREFIX', '') . '/etc/drush/' . $config_file;
// in the drush installation folder
$configs['drush'] = dirname(__FILE__) . '/../' . $config_file;
return empty($configs[$context]) ? '' : $configs[$context];
}
/**
* Load drushrc files (if available) from several possible locations.
*/
function drush_load_config($context) {
drush_load_config_file($context, _drush_config_file($context));
}
function drush_load_config_file($context, $config) {
if (file_exists($config)) {
$options = $aliases = $command_specific = $override = array();
drush_log(dt('Loading drushrc "!config" into "!context" scope.', array('!config' => realpath($config), '!context' => $context)), 'bootstrap');
$ret = @include_once($config);
if ($ret === FALSE) {
drush_log(dt('Cannot open drushrc "!config", ignoring.', array('!config' => realpath($config))), 'warning');
return FALSE;
}
if (!empty($options) || !empty($aliases) || !empty($command_specific)) {
$options = array_merge(drush_get_context($context), $options);
$options['config-file'] = realpath($config);
//$options['site-aliases'] = array_merge(isset($aliases) ? $aliases : array(), isset($options['site-aliases']) ? $options['site-aliases'] : array());
unset($options['site-aliases']);
$options['command-specific'] = array_merge(isset($command_specific) ? $command_specific : array(), isset($options['command-specific']) ? $options['command-specific'] : array());
drush_set_config_options($context, $options, $override);
}
}
}
function drush_set_config_options($context, $options, $override = array()) {
global $drush_conf_override;
// Only reset $drush_conf_override if the array is not set, otherwise keep old values and append new values to it.
if (!isset($drush_conf_override)) {
$drush_conf_override = array();
}
// Copy 'config-file' into 'context-path', converting to an array to hold multiple values if necessary
if (isset($options['config-file'])) {
if (isset($options['context-path'])) {
$options['context-path'] = array_merge(array($options['config-file']), is_array($options['context-path']) ? $options['context-path'] : array($options['context-path']));
}
else {
$options['context-path'] = $options['config-file'];
}
}
// Take out $aliases and $command_specific options
drush_set_config_special_contexts($options);
drush_set_context($context, $options);
// Instruct core not to store queries since we are not outputting them.
// Don't run poormanscron during drush request (D7+).
$defaults = array(
'dev_query' => FALSE,
'cron_safe_threshold' => 0,
);
foreach ($defaults as $key => $value) {
// This can be overridden by a command or a drushrc file if needed.
if (!isset($drush_conf_override[$key])) {
$drush_conf_override[$key] = $value;
}
}
/**
* Allow the drushrc.php file to override $conf settings.
* This is a separate variable because the $conf array gets
* initialized to an empty array, in the drupal bootstrap process,
* and changes in settings.php would wipe out the drushrc.php settings.
*/
if (!empty($override)) {
$drush_conf_override = array_merge($drush_conf_override, $override);
}
}
/**
* There are certain options such as 'site-aliases' and 'command-specific'
* that must be merged together if defined in multiple drush configuration
* files. If we did not do this merge, then the last configuration file
* that defined any of these properties would overwrite all of the options
* that came before in previously-loaded configuration files. We place
* all of them into their own context so that this does not happen.
*/
function drush_set_config_special_contexts(&$options) {
if (isset($options)) {
$has_command_specific = array_key_exists('command-specific', $options);
// Change the keys of the site aliases from 'alias' to '@alias'
if (array_key_exists('site-aliases', $options)) {
$user_aliases = $options['site-aliases'];
$options['site-aliases'] = array();
foreach ($user_aliases as $alias_name => $alias_value) {
if (substr($alias_name,0,1) != '@') {
$alias_name = "@$alias_name";
}
$options['site-aliases'][$alias_name] = $alias_value;
}
}
// Copy site aliases and command-specific options into their
// appropriate caches.
$special_contexts = drush_get_special_keys();
foreach ($special_contexts as $option_name) {
if (isset($options[$option_name])) {
$cache =& drush_get_context($option_name);
$cache = array_merge($cache, $options[$option_name]);
unset($options[$option_name]);
}
}
// If command-specific options were set and if we already have
// a command, then apply the command-specific options immediately.
if ($has_command_specific) {
drush_command_default_options();
}
}
}
/**
* Set a specific context.
*
* @param context
* Any of the default defined contexts.
* @param value
* The value to store in the context
*
* @return
* An associative array of the settings specified in the request context.
*/
function drush_set_context($context, $value) {
$cache =& drush_get_context($context);
$cache = $value;
return $value;
}
/**
* Return a specific context, or the whole context cache
*
* This function provides a storage mechanism for any information
* the currently running process might need to communicate.
*
* This avoids the use of globals, and constants.
*
* Functions that operate on the context cache, can retrieve a reference
* to the context cache using :
* $cache = &drush_get_context($context);
*
* This is a private function, because it is meant as an internal
* generalized API for writing static cache functions, not as a general
* purpose function to be used inside commands.
*
* Code that modifies the reference directly might have unexpected consequences,
* such as modifying the arguments after they have already been parsed and dispatched
* to the callbacks.
*
* @param context
* Optional. Any of the default defined contexts.
*
* @return
* If context is not supplied, the entire context cache will be returned.
* Otherwise only the requested context will be returned.
* If the context does not exist yet, it will be initialized to an empty array.
*/
function &drush_get_context($context = NULL, $default = NULL) {
static $cache = array();
if (!is_null($context)) {
if (!isset($cache[$context])) {
$default = !is_null($default) ? $default : array();
$cache[$context] = $default;
}
return $cache[$context];
}
return $cache;
}
/**
* Set the arguments passed to the drush.php script.
*
* This function will set the 'arguments' context of the current running script.
*
* When initially called by drush_parse_args, the entire list of arguments will
* be populated. Once the command is dispatched, this will be set to only the remaining
* arguments to the command (i.e. the command name is removed).
*
* @param arguments
* Command line arguments, as an array.
*/
function drush_set_arguments($arguments) {
drush_set_context('arguments', $arguments);
}
/**
* Get the arguments passed to the drush.php script.
*
* When drush_set_arguments is initially called by drush_parse_args,
* the entire list of arguments will be populated.
* Once the command has been dispatched, this will be return only the remaining
* arguments to the command.
*/
function drush_get_arguments() {
return drush_get_context('arguments');
}
/**
* Set the command being executed.
*
* Drush_dispatch will set the correct command based on it's
* matching of the script arguments retrieved from drush_get_arguments
* to the implemented commands specified by drush_get_commands.
*
* @param
* A numerically indexed array of command components.
*/
function drush_set_command($command) {
drush_set_context('command', $command);
}
/**
* Return the command being executed.
*
*
*/
function drush_get_command() {
return drush_get_context('command');
}
/**
* Get the value for an option.
*
* If the first argument is an array, then it checks whether one of the options
* exists and return the value of the first one found. Useful for allowing both
* -h and --host-name
*
* @param option
* The name of the option to get
* @param default
* Optional. The value to return if the option has not been set
* @param context
* Optional. The context to check for the option. If this is set, only this context will be searched.
*/
function drush_get_option($option, $default = NULL, $context = NULL) {
$value = NULL;
if ($context) {
// We have a definite context to check for the presence of an option.
$value = _drush_get_option($option, drush_get_context($context));
}
else {
// We are not checking a specific context, so check them in a predefined order of precedence.
$contexts = drush_context_names();
foreach ($contexts as $context) {
$value = _drush_get_option($option, drush_get_context($context));
if ($value !== NULL) {
return $value;
}
}
}
if ($value !== NULL) {
return $value;
}
return $default;
}
/**
* Get the value for an option and return it as a list. If the
* option in question is passed on the command line, its value should
* be a comma-separated list (e.g. --flag=1,2,3). If the option
* was set in a drushrc.php file, then its value may be either a
* comma-separated list or an array of values (e.g. $option['flag'] = array('1', '2', '3')).
*
* @param option
* The name of the option to get
* @param default
* Optional. The value to return if the option has not been set
* @param context
* Optional. The context to check for the option. If this is set, only this context will be searched.
*/
function drush_get_option_list($option, $default = array(), $context = NULL) {
$result = drush_get_option($option, $default, $context);
if (!is_array($result)) {
$result = explode(',', $result);
}
return $result;
}
/**
* Get the value for an option, but first checks the provided option overrides.
*
* The feature of drush_get_option that allows a list of option names
* to be passed in an array is NOT supported.
*
* @param option_overrides
* An array to check for values before calling drush_get_option.
* @param option
* The name of the option to get.
* @param default
* Optional. The value to return if the option has not been set.
* @param context
* Optional. The context to check for the option. If this is set, only this context will be searched.
*
*/
function drush_get_option_override($option_overrides, $option, $value = NULL, $context = NULL) {
if (array_key_exists($option, $option_overrides)) {
return $option_overrides[$option];
}
else {
return drush_get_option($option, $value, $context);
}
}
/**
* Get all of the values for an option in every context.
*
* @param option
* The name of the option to get
* @return
* An array whose key is the context name and value is
* the specific value for the option in that context.
*/
function drush_get_context_options($option, $flatten = FALSE) {
$result = array();
$contexts = drush_context_names();
foreach ($contexts as $context) {
$value = _drush_get_option($option, drush_get_context($context));
if ($value !== NULL) {
if ($flatten && is_array($value)) {
$result = array_merge($value, $result);
}
else {
$result[$context] = $value;
}
}
}
return $result;
}
/**
* Retrieves a collapsed list of all options
*/
function drush_get_merged_options() {
$contexts = drush_context_names();
$cache = drush_get_context();
$result = array();
foreach (array_reverse($contexts) as $context) {
if (array_key_exists($context, $cache)) {
$result = array_merge($result, $cache[$context]);
}
}
return $result;
}
/**
* Helper function to recurse through possible option names
*/
function _drush_get_option($option, $context) {
if (is_array($option)) {
foreach ($option as $current) {
if (array_key_exists($current, $context)) {
return $context[$current];
}
}
}
elseif (array_key_exists($option, $context)) {
return $context[$option];
}
return NULL;
}
/**
* Set an option in one of the option contexts.
*
* @param option
* The option to set.
* @param value
* The value to set it to.
* @param context
* Optional. Which context to set it in.
* @return
* The value parameter. This allows for neater code such as
* $myvalue = drush_set_option('http_host', $_SERVER['HTTP_HOST']);
* Without having to constantly type out the value parameter.
*/
function drush_set_option($option, $value, $context = 'process') {
$cache =& drush_get_context($context);
$cache[$option] = $value;
return $value;
}
/**
* A small helper function to set the value in the default context
*/
function drush_set_default($option, $value) {
return drush_set_option($option, $value, 'default');
}
/**
* Remove a setting from a specific context.
*
* @param
* Option to be unset
* @param
* Context in which to unset the value in.
*/
function drush_unset_option($option, $context = NULL) {
if ($context != NULL) {
$cache =& drush_get_context($context);
if (array_key_exists($option, $cache)) {
unset($cache[$option]);
}
}
else {
$contexts = drush_context_names();
foreach ($contexts as $context) {
drush_unset_option($option, $context);
}
}
}
/**
* Save the settings in a specific context to the applicable configuration file
* This is useful is you want certain settings to be available automatically the next time a command is executed.
*
* @param $context
* The context to save
*/
function drush_save_config($context) {
$filename = _drush_config_file($context);
if ($filename) {
$cache = drush_get_context($context);
$fp = fopen($filename, "w+");
if (!$fp) {
return drush_set_error('DRUSH_PERM_ERROR', dt('Drushrc (!filename) could not be written', array('!filename' => $filename)));
}
else {
fwrite($fp, "<?php\n");
$timestamp = mktime();
foreach ($cache as $key => $value) {
$line = "\n\$options['$key'] = ". var_export($value, TRUE) .';';
fwrite($fp, $line);
}
fwrite($fp, "\n");
fclose($fp);
drush_log(dt('Drushrc file (!filename) was written successfully', array('!filename' => $filename)));
return TRUE;
}
}
return FALSE;
}

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