MustachePOT extends MakePOT in WordPress tools to additionally scan for localized strings in Mustache templates.

mustachepot.php

<?php

error_reporting( E_ALL ^ E_STRICT ); // le sigh

require __DIR__ . '/wordpress/tools/i18n/makepot.php';

/**
 * Additionally scans for localized strings in Mustache templates.
 */
class MustachePOT extends MakePOT {

	/**
	 * @param string $dir
	 * @param string $output
	 * @param string $slug
	 *
	 * @return bool
	 */
	public function wp_plugin( $dir, $output, $slug = null ) {

		$placeholders = array();

		// guess plugin slug
		if ( is_null( $slug ) ) {
			$slug = $this->guess_plugin_slug( $dir );
		}

		$main_file = $dir . '/' . $slug . '.php';
		$source    = $this->get_first_lines( $main_file, $this->max_header_lines );

		$placeholders['version'] = $this->get_addon_header( 'Version', $source );
		$placeholders['author']  = $this->get_addon_header( 'Author', $source );
		$placeholders['name']    = $this->get_addon_header( 'Plugin Name', $source );
		$placeholders['slug']    = $slug;

		$output = is_null( $output ) ? "$slug.pot" : $output;
		$res    = $this->xgettext( 'wp-plugin', $dir, $output, $placeholders );

		if ( ! $res ) {
			return false;
		}

		$potextmeta = new PotExtMeta;
		$res        = $potextmeta->append( $main_file, $output );

		if ( ! $res ) {
			return false;
		}

		$res = $this->append( $dir, $output );

		if ( ! $res ) {
			return false;
		}

		/* Adding non-gettexted strings can repeat some phrases */
		$output_shell = escapeshellarg( $output );
		system( "msguniq $output_shell -o $output_shell" );

		return true;
	}

	/**
	 * @param string $ext_filename
	 * @param string $pot_filename
	 *
	 * @return bool
	 */
	function append( $ext_filename, $pot_filename ) {

		if ( is_dir( $ext_filename ) ) {
			// glob is tad hardcoded, not figuring out recursive right now
			$pot = implode( '', array_map( array( $this, 'load_from_file' ), glob( "$ext_filename/mustache/*.mustache" ) ) );
		} else {
			$pot = $this->load_from_file( $ext_filename );
		}

		$potf = '-' == $pot_filename ? STDOUT : fopen( $pot_filename, 'a' );

		if ( ! $potf ) {
			return false;
		}

		fwrite( $potf, $pot );

		if ( '-' != $pot_filename ) {
			fclose( $potf );
		}

		return true;
	}

	/**
	 * @param string $ext_filename
	 *
	 * @return string
	 */
	function load_from_file( $ext_filename ) {

		$pot     = '';
		$strings = array();
		preg_match_all( '/{{#i18n}}(.*?){{\/i18n}}/', file_get_contents( $ext_filename ), $strings );
		if ( ! empty( $strings[1] ) ) {
			$strings = $strings[1];
		} else {
			return $pot;
		}

		foreach ( $strings as $string ) {

			$entry = new Translation_Entry( array( 'singular' => $string ) );
			$pot .= "\n" . PO::export_entry( $entry ) . "\n";
		}

		return $pot;
	}
}

// run the CLI only if the file
// wasn't included
$included_files = get_included_files();

if ( $included_files[0] == __FILE__ ) {

	$makepot = new MustachePOT();

	if ( ( 3 == count( $argv ) || 4 == count( $argv ) ) && in_array( $method = str_replace( '-', '_', $argv[1] ), get_class_methods( $makepot ) ) ) {

		$res = call_user_func( array( $makepot, $method ), realpath( $argv[2] ), isset( $argv[3] ) ? $argv[3] : null );

		if ( false === $res ) {
			fwrite( STDERR, "Couldn't generate POT file!\n" );
		}
	} else {

		$usage  = "Usage: php mustachepot.php PROJECT DIRECTORY [OUTPUT]\n\n";
		$usage .= "Generate POT file from the files in DIRECTORY [OUTPUT]\n";
		$usage .= 'Available projects: ' . implode( ', ', $makepot->projects ) . "\n";
		fwrite( STDERR, $usage );

		exit( 1 );
	}
}