Show logs to the console in 'phd debug'

Summary:
Currently we send logs to the logfile in 'phd debug', but we should send them to
the console instead.

Also fixed some %C stuff which could theoretically cause problems if a user had
percentage symbols in their paths (heaven forbid).

fratrik, this or D535 might have been involved in frustrating your efforts to
debug the "sudo" stuff.

Test Plan:
Ran "phd debug irc derpderp" and "phd launch irc derpderp". In the former case,
the exception appeared in the console. In the latter, it appeared in the log.

Reviewed By: codeblock
Reviewers: codeblock, jungejason, tuomaspelkonen, aran, fratrik
CC: aran, codeblock
Differential Revision: 536

scripts/daemon/phabricator_daemon_launcher.php

@@ -163,7 +163,15 @@
       $daemon = reset($match);
     }
 
-    will_launch($control);
+    $with_logs = true;
+    if ($is_debug) {
+      // In debug mode, we emit errors straight to stdout, so nothing useful
+      // will show up in the logs. Don't echo the message about stuff showing
+      // up in them, since it would be confusing.
+      $with_logs = false;
+    }
+
+    will_launch($control, $with_logs);
 
     if ($is_debug) {
       echo "Launching {$daemon} in debug mode (nondaemonized)...\n";
@@ -217,10 +225,12 @@ function phd_load_tracked_repositories() {
   return $repositories;
 }
 
-function will_launch($control) {
+function will_launch($control, $with_logs = true) {
   echo "Staging launch...\n";
   $control->pingConduit();
-  $log_dir = $control->getControlDirectory('log').'/daemons.log';
-  echo "NOTE: Logs will appear in '{$log_dir}'.\n\n";
+  if ($with_logs) {
+    $log_dir = $control->getControlDirectory('log').'/daemons.log';
+    echo "NOTE: Logs will appear in '{$log_dir}'.\n\n";
+  }
 }
 

src/infrastructure/daemon/control/PhabricatorDaemonControl.php

@@ -216,17 +216,24 @@ public function launchDaemon($daemon, array $argv, $debug = false) {
       "./launch_daemon.php ".
         "%s ".
         "--load-phutil-library=%s ".
-        implode(' ', $extra_libraries)." ".
+        "%C ".
         "--conduit-uri=%s ".
         "--phd=%s ".
-        "--log=%s ".
-        ($debug ? '--trace ' : '--daemonize ').
-        implode(' ', $argv),
+        ($debug ? '--trace ' : '--daemonize '),
       $daemon,
       phutil_get_library_root('phabricator'),
+      implode(' ', $extra_libraries),
       PhabricatorEnv::getURI('/api/'),
-      $pid_dir,
-      $log_dir);
+      $pid_dir);
+
+    if (!$debug) {
+      // If we're running "phd debug", send output straight to the console
+      // instead of to a logfile.
+      $command = csprintf("%C --log=%s", $command, $log_dir);
+    }
+
+    // Append the daemon's argv.
+    $command = csprintf("%C %C", $command, implode(' ', $argv));
 
     if ($debug) {
       // Don't terminate when the user sends ^C; it will be sent to the