Add dry-run flag & makefile target

.phpenv

@@ -16,14 +16,14 @@
 	include_once "$PROJECT_ROOT/php/utils/logging.php";
 
 	// Read the -v|--verbose option increasing logging verbosity to debug.
-	$options = getopt("v", ["verbose", "fast", "no-color"]);
+	$options = getopt("vn", ["verbose", "fast", "no-color", "dry-run"]);
 	if (isset($options["v"]) or isset($options["verbose"])) {
 		$LOGGING_VERBOSITY = LoggingVerbosity::Debug;
 	}
 
-	if (isset($options["fast"])) {
-		$FAST_FETCH_MODE = true;
-	}
+	$FAST_FETCH_MODE = (isset($options["fast"]));
+
+	$DO_DRY_RUN = (isset($options["n"]) || isset($options["dry-run"]));
 
 	if (isset($options["no-color"])) {
 		LoggingVerbosity::$showColor = false;

Makefile

@@ -18,6 +18,10 @@ all: fetch html
 fetch:
 	/bin/php php/fetch-servers.php $(FLAGS)
 
+# Fetch room listing without writing to disk.
+fetch-dry:
+	/bin/php php/fetch-servers.php $(FLAGS) --dry-run
+
 # Generate HTML from data.
 html:
 	/bin/php php/generate-html.php $(FLAGS)

php/fetch-servers.php

@@ -22,7 +22,7 @@
 	 * 6. De-dupe servers based on pubkey
 	 */
 	function main() {
-		global $CACHE_ROOT, $ROOMS_FILE, $KNOWN_SERVERS, $KNOWN_PUBKEYS;
+		global $CACHE_ROOT, $ROOMS_FILE, $KNOWN_SERVERS, $KNOWN_PUBKEYS, $DO_DRY_RUN;
 
 		// Create default directories..
 		file_exists($CACHE_ROOT) or mkdir($CACHE_ROOT, 0700);
@@ -61,7 +61,7 @@
 		);
 
 		// Output fetching results to file.
-		file_put_contents($ROOMS_FILE, json_encode($servers));
+		if (!$DO_DRY_RUN) file_put_contents($ROOMS_FILE, json_encode($servers));
 	}
 
 	/**