Gone Branch Be Gone

branch-be-gone.php

#!/usr/bin/env php
<?php

`git fetch -p --all`;
$branches = `git branch -vv`;

preg_match_all('%^\ +(?P<branch>[\w/=\-.#]+)\ +(?P<hash>[0-9a-fA-F]+)\ \[[\w/=\-.#]+:\sgone\]%smx', $branches, $result, PREG_PATTERN_ORDER);

foreach( $result['branch'] as $index => $branch ) {
	$output = [ ];
	exec("git branch -d " . escapeshellarg($branch) . " 2>&1", $output, $exitCode);

	if( !$exitCode ) {
		echo "Deleted: {$branch} - was at {$result['hash'][$index]}\n";
	} else {
		echo "Failed to delete {$branch}\n";
		echo "\t| " . implode("\n\t| ", $output) . "\n\n";
	}
}

This deletes merged branches that track a remote that no longer exists.