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FileFinder.php
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Thu, Nov 7, 18:59

FileFinder.php
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<?php
/**
* Find files on disk matching criteria, like the 'find' system utility. Use of
* this class is straightforward:
*
* // Find PHP files in /tmp
* $files = id(new FileFinder('/tmp'))
* ->withType('f')
* ->withSuffix('php')
* ->find();
*
* @task create Creating a File Query
* @task config Configuring File Queries
* @task exec Executing the File Query
* @task internal Internal
* @group filesystem
*/
final class FileFinder {
private $root;
private $exclude = array();
private $paths = array();
private $suffix = array();
private $type;
private $generateChecksums = false;
private $followSymlinks;
private $forceMode;
/**
* Create a new FileFinder.
*
* @param string Root directory to find files beneath.
* @return this
* @task create
*/
public function __construct($root) {
$this->root = rtrim($root, '/');
}
/**
* @task config
*/
public function excludePath($path) {
$this->exclude[] = $path;
return $this;
}
/**
* @task config
*/
public function withSuffix($suffix) {
$this->suffix[] = '*.'.$suffix;
return $this;
}
/**
* @task config
*/
public function withPath($path) {
$this->paths[] = $path;
return $this;
}
/**
* @task config
*/
public function withType($type) {
$this->type = $type;
return $this;
}
/**
* @task config
*/
public function withFollowSymlinks($follow) {
$this->followSymlinks = $follow;
return $this;
}
/**
* @task config
*/
public function setGenerateChecksums($generate) {
$this->generateChecksums = $generate;
return $this;
}
/**
* @task config
* @param string Either "php", "shell", or the empty string.
*/
public function setForceMode($mode) {
$this->forceMode = $mode;
return $this;
}
/**
* @task internal
*/
public function validateFile($file) {
$matches = (count($this->suffix) == 0);
foreach ($this->suffix as $curr_suffix) {
if (fnmatch($curr_suffix, $file)) {
$matches = true;
break;
}
}
if (!$matches) {
return false;
}
$matches = (count($this->paths) == 0);
foreach ($this->paths as $path) {
if (fnmatch($path, $this->root.'/'.$file)) {
$matches = true;
break;
}
}
$fullpath = $this->root.'/'.ltrim($file, '/');
if (($this->type == 'f' && is_dir($fullpath))
|| ($this->type == 'd' && !is_dir($fullpath))) {
$matches = false;
}
return $matches;
}
/**
* @task internal
*/
private function getFiles($dir) {
$found = Filesystem::listDirectory($this->root.'/'.$dir, true);
$files = array();
if (strlen($dir) > 0) {
$dir = rtrim($dir, '/').'/';
}
foreach ($found as $filename) {
// Only exclude files whose names match relative to the root.
if ($dir == "") {
$matches = true;
foreach ($this->exclude as $exclude_path) {
if (fnmatch(ltrim($exclude_path, './'), $dir.$filename)) {
$matches = false;
break;
}
}
if (!$matches) {
continue;
}
}
if ($this->validateFile($dir.$filename)) {
$files[] = $dir.$filename;
}
if (is_dir($this->root.'/'.$dir.$filename)) {
foreach ($this->getFiles($dir.$filename) as $file) {
$files[] = $file;
}
}
}
return $files;
}
/**
* @task exec
*/
public function find() {
$files = array();
if (!is_dir($this->root) || !is_readable($this->root)) {
throw new Exception(
"Invalid FileFinder root directory specified ('{$this->root}'). ".
"Root directory must be a directory, be readable, and be specified ".
"with an absolute path.");
}
if ($this->forceMode == "shell") {
$php_mode = false;
} else if ($this->forceMode == "php") {
$php_mode = true;
} else {
$php_mode = (phutil_is_windows() || exec("which find") == "");
}
if ($php_mode) {
$files = $this->getFiles("");
} else {
$args = array();
$command = array();
$command[] = 'find';
if ($this->followSymlinks) {
$command[] = '-L';
}
$command[] = '.';
if ($this->exclude) {
$command[] = $this->generateList('path', $this->exclude).' -prune';
$command[] = '-o';
}
if ($this->type) {
$command[] = '-type %s';
$args[] = $this->type;
}
if ($this->suffix) {
$command[] = $this->generateList('name', $this->suffix);
}
if ($this->paths) {
$command[] = $this->generateList('path', $this->paths);
}
$command[] = '-print0';
array_unshift($args, implode(' ', $command));
list($stdout) = newv('ExecFuture', $args)
->setCWD($this->root)
->resolvex();
$stdout = trim($stdout);
if (!strlen($stdout)) {
return array();
}
$files = explode("\0", $stdout);
// On OSX/BSD, find prepends a './' to each file.
for ($i = 0; $i < count($files); $i++) {
if (substr($files[$i], 0, 2) == './') {
$files[$i] = substr($files[$i], 2);
}
}
}
if (!$this->generateChecksums) {
return $files;
} else {
$map = array();
foreach ($files as $line) {
$fullpath = $this->root.'/'.ltrim($line, '/');
if (is_dir($fullpath)) {
$map[$line] = null;
} else {
$map[$line] = md5_file($fullpath);
}
}
return $map;
}
}
/**
* @task internal
*/
private function generateList($flag, array $items) {
$items = array_map('escapeshellarg', $items);
foreach ($items as $key => $item) {
$items[$key] = '-'.$flag.' '.$item;
}
$items = implode(' -o ', $items);
return '"(" '.$items.' ")"';
}
}

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