Execute a phing target when a file has been modified - phing

Question

I have a filelist of about 25 files. I need to execute a certain phing target when the modification time of one of these files has changed. What is the best way to do this?

Answer 1

If you're after cross-platform then I guess you could try something like the Node.js beholder or hound to spawn a command line exec for Phing. Alternatively there are a few C++ cross-platform watcher libraries around if you want to roll your own.

Answer 2

Extend phing by writing your own task. Something like this one which uses filesets.
Limited to watching files for changes only.
<?php
/**
Example target:
<target name="mytarget">
<react refresh="1.7" cmd="dosomething.sh">
<fileset dir=".">
<include name="*.txt" />
</fileset>
</react>
</target>
Will call dosomething.sh script when a txt file has changed in the current
directory every 1.7 seconds.
$Id: ReactTask.php 123 2013-07-22 08:16:26Z gregory.vincic $
*/
require_once "phing/Task.php";
class ReactTask extends Task {
/** Command to execute */
private $cmd = null;
public function setCmd($str) {
$this->cmd = $str;
}
/** Refresh time in microseconds, defaults to 1 second. */
private $refresh = 1000000;
public function setRefresh($str) {
if($str != null && is_numeric($str)) {
$this->refresh = $str*1000000;
}
}
/** Any filesets of files that should be appended. */
private $filesets = array();
function createFileSet() {
$num = array_push($this->filesets, new FileSet());
return $this->filesets[$num-1];
}
/** Uses phps passthru to execute the configured command every X seconds */
public function main() {
$lastmtime = null;
$this->log("Refreshing every " . $this->refresh/1000000 . " seconds.\n", Project::MSG_WARN);
while(1) {
$mtimes = $this->rlist();
if(count($mtimes) > 0 && max($mtimes) > $lastmtime) {
passthru($this->cmd);
$lastmtime = max($mtimes);
}
usleep($this->refresh);
}
}
/** Lists modification times of all the files defined by your filesets. */
private function rlist() {
$res = array();
foreach($this->filesets as $fs) {
try {
$files = $fs->getDirectoryScanner($this->project)->getIncludedFiles();
foreach ($files as $file) {
$path = $fs->dir . "/" . $file;
$res[] = filemtime($path);
}
} catch (BuildException $be) {
$this->log($be->getMessage(), Project::MSG_WARN);
}
}
return $res;
}
}
?>