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PhutilEditorConfig.php
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Fri, Nov 22, 00:31

PhutilEditorConfig.php
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<?php
/**
* Parser for [[http://editorconfig.org/ | EditorConfig]] files.
*/
final class PhutilEditorConfig extends Phobject {
const CHARSET = 'charset';
const END_OF_LINE = 'end_of_line';
const INDENT_SIZE = 'indent_size';
const INDENT_STYLE = 'indent_style';
const FINAL_NEWLINE = 'insert_final_newline';
const LINE_LENGTH = 'max_line_length';
const TAB_WIDTH = 'tab_width';
const TRAILING_WHITESPACE = 'trim_trailing_whitespace';
/**
* Valid properties.
*
* See http://editorconfig.org/#file-format-details.
*/
private static $knownProperties = array(
self::CHARSET => array(
'latin1',
'utf-8',
'utf-8-bom',
'utf-16be',
'utf-16le',
),
self::END_OF_LINE => array('lf', 'cr', 'crlf'),
self::INDENT_SIZE => 'int|string',
self::INDENT_STYLE => array('space', 'tab'),
self::FINAL_NEWLINE => 'bool',
self::LINE_LENGTH => 'int',
self::TAB_WIDTH => 'int',
self::TRAILING_WHITESPACE => 'bool',
);
private $root;
/**
* Constructor.
*
* @param string The root directory.
*/
public function __construct($root) {
$this->root = $root;
}
/**
* Get the specified EditorConfig property for the specified path.
*
* @param string
* @param string
* @return wild
*/
public function getProperty($path, $key) {
if (!idx(self::$knownProperties, $key)) {
throw new InvalidArgumentException(pht('Invalid EditorConfig property.'));
}
$props = $this->getProperties($path);
switch ($key) {
case self::INDENT_SIZE:
if (idx($props, self::INDENT_SIZE) === null &&
idx($props, self::INDENT_STYLE) === 'tab') {
return 'tab';
} else if (idx($props, self::INDENT_SIZE) === 'tab' &&
idx($props, self::TAB_WIDTH) === null) {
return idx($props, self::TAB_WIDTH);
}
break;
case self::TAB_WIDTH:
if (idx($props, self::TAB_WIDTH) === null &&
idx($props, self::INDENT_SIZE) !== null &&
idx($props, self::INDENT_SIZE) !== 'tab') {
return idx($props, self::INDENT_SIZE);
}
break;
}
return idx($props, $key);
}
/**
* Get the EditorConfig properties for the specified path.
*
* Returns a map containing all of the EditorConfig properties which apply
* to the specified path. The following rules are applied when processing
* EditorConfig files:
*
* - If a glob does not contain `/`, it can match a path in any subdirectory.
* - If the first character of a glob is `/`, it will only match files in the
* same directory as the `.editorconfig` file.
* - Properties and values are case-insensitive.
* - Unknown properties will be silently ignored.
* - Values are not validated against the specification (this may change in
* the future).
* - Invalid glob patterns will be silently ignored.
*
* @param string
* @return map<string, wild>
*/
public function getProperties($path) {
$configs = $this->getEditorConfigs($path);
$matches = array();
foreach ($configs as $config) {
list($path_prefix, $editorconfig) = $config;
foreach ($editorconfig as $glob => $properties) {
if (!$glob) {
continue;
}
if (strpos($glob, '/') === false) {
$glob = '**/'.$glob;
} else if (strncmp($glob, '/', 0)) {
$glob = substr($glob, 1);
}
$glob = $path_prefix.'/'.$glob;
try {
if (!phutil_fnmatch($glob, $path)) {
continue;
}
} catch (Exception $ex) {
// Invalid glob pattern... ignore it.
continue;
}
foreach ($properties as $property => $value) {
$property = strtolower($property);
if (!idx(self::$knownProperties, $property)) {
// Unknown property... ignore it.
continue;
}
if (is_string($value)) {
$value = strtolower($value);
}
if ($value === '') {
$value = null;
}
$matches[$property] = $value;
}
}
}
return $matches;
}
/**
* Returns the EditorConfig files which affect the specified path.
*
* Find and parse all `.editorconfig` files between the specified path and
* the root directory. The results are returned in the same order that they
* should be matched.
*
* return list<pair<string, map>>
*/
private function getEditorConfigs($path) {
$configs = array();
$found_root = false;
$root = $this->root;
do {
$path = dirname($path);
$file = $path.'/.editorconfig';
if (!Filesystem::pathExists($file)) {
continue;
}
$contents = Filesystem::readFile($file);
$config = phutil_ini_decode($contents);
if (idx($config, 'root') === true) {
$found_root = true;
}
unset($config['root']);
array_unshift($configs, array($path, $config));
if ($found_root) {
break;
}
} while ($path != $root && Filesystem::isDescendant($path, $root));
return $configs;
}
}

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