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ArcanistWorkingCopyIdentity.php
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ArcanistWorkingCopyIdentity.php
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<?php
/**
* Interfaces with basic information about the working copy.
*
* @task config
*/
final class ArcanistWorkingCopyIdentity extends Phobject {
private $projectConfig;
private $projectRoot;
private $localConfig = array();
private $localMetaDir;
private $vcsType;
private $vcsRoot;
public static function newDummyWorkingCopy() {
return self::newFromPathWithConfig('/', array());
}
public static function newFromPath($path) {
return self::newFromPathWithConfig($path, null);
}
/**
* Locate all the information we need about a directory which we presume
* to be a working copy. Particularly, we want to discover:
*
* - Is the directory inside a working copy (hg, git, svn)?
* - If so, what is the root of the working copy?
* - Is there a `.arcconfig` file?
*
* This is complicated, mostly because Subversion has special rules. In
* particular:
*
* - Until 1.7, Subversion put a `.svn/` directory inside //every//
* directory in a working copy. After 1.7, it //only// puts one at the
* root.
* - We allow `.arcconfig` to appear anywhere in a Subversion working copy,
* and use the one closest to the directory.
* - Although we may use a `.arcconfig` from a subdirectory, we store
* metadata in the root's `.svn/`, because it's the only one guaranteed
* to exist.
*
* Users also do these kinds of things in the wild:
*
* - Put working copies inside other working copies.
* - Put working copies inside `.git/` directories.
* - Create `.arcconfig` files at `/.arcconfig`, `/home/.arcconfig`, etc.
*
* This method attempts to be robust against all sorts of possible
* misconfiguration.
*
* @param string $path Path to load information for, usually the current
* working directory (unless running unit tests).
* @param map|null $config Pass `null` to locate and load a `.arcconfig`
* file if one exists. Pass a map to use it to set
* configuration.
* @return ArcanistWorkingCopyIdentity Constructed working copy identity.
*/
private static function newFromPathWithConfig($path, $config) {
$project_root = null;
$vcs_root = null;
$vcs_type = null;
// First, find the outermost directory which is a Git, Mercurial or
// Subversion repository, if one exists. We go from the top because this
// makes it easier to identify the root of old SVN working copies (which
// have a ".svn/" directory inside every directory in the working copy) and
// gives us the right result if you have a Git repository inside a
// Subversion repository or something equally ridiculous.
$paths = Filesystem::walkToRoot($path);
$config_paths = array();
$paths = array_reverse($paths);
foreach ($paths as $path_key => $parent_path) {
$try = array(
'git' => $parent_path.'/.git',
'hg' => $parent_path.'/.hg',
'svn' => $parent_path.'/.svn',
);
foreach ($try as $vcs => $try_dir) {
if (!Filesystem::pathExists($try_dir)) {
continue;
}
// NOTE: We're distinguishing between the `$project_root` and the
// `$vcs_root` because they may not be the same in Subversion. Normally,
// they are identical. However, in Subversion, the `$vcs_root` is the
// base directory of the working copy (the directory which has the
// `.svn/` directory, after SVN 1.7), while the `$project_root` might
// be any subdirectory of the `$vcs_root`: it's the the directory
// closest to the current directory which contains a `.arcconfig`.
$project_root = $parent_path;
$vcs_root = $parent_path;
$vcs_type = $vcs;
if ($vcs == 'svn') {
// For Subversion, we'll look for a ".arcconfig" file here or in
// any subdirectory, starting at the deepest subdirectory.
$config_paths = array_slice($paths, $path_key);
$config_paths = array_reverse($config_paths);
} else {
// For Git and Mercurial, we'll only look for ".arcconfig" right here.
$config_paths = array($parent_path);
}
break;
}
}
$console = PhutilConsole::getConsole();
$looked_in = array();
foreach ($config_paths as $config_path) {
$config_file = $config_path.'/.arcconfig';
$looked_in[] = $config_file;
if (Filesystem::pathExists($config_file)) {
// We always need to examine the filesystem to look for `.arcconfig`
// so we can set the project root correctly. We might or might not
// actually read the file: if the caller passed in configuration data,
// we'll ignore the actual file contents.
$project_root = $config_path;
if ($config === null) {
$console->writeLog(
"%s\n",
pht(
'Working Copy: Reading %s from "%s".',
'.arcconfig',
$config_file));
$config_data = Filesystem::readFile($config_file);
$config = self::parseRawConfigFile($config_data, $config_file);
}
break;
}
}
if ($config === null) {
if ($looked_in) {
$console->writeLog(
"%s\n",
pht(
'Working Copy: Unable to find %s in any of these locations: %s.',
'.arcconfig',
implode(', ', $looked_in)));
} else {
$console->writeLog(
"%s\n",
pht(
'Working Copy: No candidate locations for %s from '.
'this working directory.',
'.arcconfig'));
}
$config = array();
}
if ($project_root === null) {
// We aren't in a working directory at all. This is fine if we're
// running a command like "arc help". If we're running something that
// requires a working directory, an exception will be raised a little
// later on.
$console->writeLog(
"%s\n",
pht('Working Copy: Path "%s" is not in any working copy.', $path));
return new ArcanistWorkingCopyIdentity($path, $config);
}
$console->writeLog(
"%s\n",
pht(
'Working Copy: Path "%s" is part of `%s` working copy "%s".',
$path,
$vcs_type,
$vcs_root));
$console->writeLog(
"%s\n",
pht(
'Working Copy: Project root is at "%s".',
$project_root));
$identity = new ArcanistWorkingCopyIdentity($project_root, $config);
$identity->localMetaDir = $vcs_root.'/.'.$vcs_type;
$identity->localConfig = $identity->readLocalArcConfig();
$identity->vcsType = $vcs_type;
$identity->vcsRoot = $vcs_root;
return $identity;
}
public static function newFromRootAndConfigFile(
$root,
$config_raw,
$from_where) {
if ($config_raw === null) {
$config = array();
} else {
$config = self::parseRawConfigFile($config_raw, $from_where);
}
return self::newFromPathWithConfig($root, $config);
}
private static function parseRawConfigFile($raw_config, $from_where) {
try {
return phutil_json_decode($raw_config);
} catch (PhutilJSONParserException $ex) {
throw new PhutilProxyException(
pht("Unable to parse '%s' file '%s'.", '.arcconfig', $from_where),
$ex);
}
}
private function __construct($root, array $config) {
$this->projectRoot = $root;
$this->projectConfig = $config;
}
public function getProjectRoot() {
return $this->projectRoot;
}
public function getProjectPath($to_file) {
return $this->projectRoot.'/'.$to_file;
}
public function getVCSType() {
return $this->vcsType;
}
public function getVCSRoot() {
return $this->vcsRoot;
}
/* -( Config )------------------------------------------------------------- */
public function readProjectConfig() {
return $this->projectConfig;
}
/**
* Read a configuration directive from project configuration. This reads ONLY
* permanent project configuration (i.e., ".arcconfig"), not other
* configuration sources. See @{method:getConfigFromAnySource} to read from
* user configuration.
*
* @param key $key Key to read.
* @param wild $default (Optional) Default value if key is not found.
* @return wild Value, or default value if not found.
*
* @task config
*/
public function getProjectConfig($key, $default = null) {
$settings = new ArcanistSettings();
$pval = idx($this->projectConfig, $key);
// Test for older names in the per-project config only, since
// they've only been used there.
if ($pval === null) {
$legacy = $settings->getLegacyName($key);
if ($legacy) {
$pval = $this->getProjectConfig($legacy);
}
}
if ($pval === null) {
$pval = $default;
} else {
$pval = $settings->willReadValue($key, $pval);
}
return $pval;
}
/**
* Read a configuration directive from local configuration. This
* reads ONLY the per-working copy configuration,
* i.e. .(git|hg|svn)/arc/config, and not other configuration
* sources. See @{method:getConfigFromAnySource} to read from any
* config source or @{method:getProjectConfig} to read permanent
* project-level config.
*
* @task config
*/
public function getLocalConfig($key, $default = null) {
return idx($this->localConfig, $key, $default);
}
public function readLocalArcConfig() {
if ($this->localMetaDir !== null && strlen($this->localMetaDir)) {
$local_path = Filesystem::resolvePath('arc/config', $this->localMetaDir);
$console = PhutilConsole::getConsole();
if (Filesystem::pathExists($local_path)) {
$console->writeLog(
"%s\n",
pht(
'Config: Reading local configuration file "%s"...',
$local_path));
try {
$json = Filesystem::readFile($local_path);
return phutil_json_decode($json);
} catch (PhutilJSONParserException $ex) {
throw new PhutilProxyException(
pht("Failed to parse '%s' as JSON.", $local_path),
$ex);
}
} else {
$console->writeLog(
"%s\n",
pht(
'Config: Did not find local configuration at "%s".',
$local_path));
}
}
return array();
}
public function writeLocalArcConfig(array $config) {
$json_encoder = new PhutilJSON();
$json = $json_encoder->encodeFormatted($config);
$dir = $this->localMetaDir;
if (!strlen($dir)) {
throw new Exception(pht('No working copy to write config into!'));
}
$local_dir = $dir.DIRECTORY_SEPARATOR.'arc';
if (!Filesystem::pathExists($local_dir)) {
Filesystem::createDirectory($local_dir, 0755);
}
$config_file = $local_dir.DIRECTORY_SEPARATOR.'config';
Filesystem::writeFile($config_file, $json);
}
}

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Content licensed under Creative Commons Attribution-ShareAlike 4.0 (CC-BY-SA) unless otherwise noted; code licensed under Apache 2.0 or other open source licenses. · CC BY-SA 4.0 · Apache 2.0