From 77ee93fc2852fa057f03229cecde6b389f65d6dd Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <m.bunkus@linet-services.de>
Date: Thu, 14 Apr 2011 14:22:43 +0200
Subject: [PATCH] =?utf8?q?Optionaler,=20automatischer=20FCGI-Restart=20nac?=
 =?utf8?q?h=20Request=20bei=20Programm=C3=A4nderungen?=
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Muss in Konfiguration in [debug] mit restart_fcgi_process_on_changes
angeschaltet werden. Überwacht alle Dateien in SL, bin, config,
templates/webpages sowie einige im Basisverzeichnis auf Änderungen des
Modifizierungszeitstempels.
---
 SL/Dispatcher.pm              | 51 +++++++++++++++++++++++++++++++----
 config/lx_office.conf.default |  5 ++++
 2 files changed, 51 insertions(+), 5 deletions(-)

diff --git a/SL/Dispatcher.pm b/SL/Dispatcher.pm
index 7abe58f7a..0071e8137 100644
--- a/SL/Dispatcher.pm
+++ b/SL/Dispatcher.pm
@@ -12,6 +12,10 @@ use Config::Std;
 use DateTime;
 use Encode;
 use English qw(-no_match_vars);
+use File::Basename;
+use List::MoreUtils qw(all);
+use List::Util qw(first);
+use POSIX;
 use SL::Auth;
 use SL::LXDebug;
 use SL::LxOfficeConf;
@@ -20,13 +24,13 @@ use SL::Common;
 use SL::Form;
 use SL::Helper::DateTime;
 use SL::Template::Plugin::HTMLFixes;
-use List::Util qw(first);
-use File::Basename;
 
 # Trailing new line is added so that Perl will not add the line
 # number 'die' was called in.
 use constant END_OF_REQUEST => "END-OF-REQUEST\n";
 
+my %fcgi_file_cache;
+
 sub new {
   my ($class, $interface) = @_;
 
@@ -73,6 +77,8 @@ sub show_error {
 }
 
 sub pre_startup_setup {
+  my ($self) = @_;
+
   SL::LxOfficeConf->read;
   _init_environment();
 
@@ -94,7 +100,9 @@ sub pre_startup_setup {
 
   $SIG{__WARN__} = sub {
     $::lxdebug->warn(@_);
-  }
+  };
+
+  $self->_cache_file_modification_times;
 }
 
 sub pre_startup_checks {
@@ -102,8 +110,9 @@ sub pre_startup_checks {
 }
 
 sub pre_startup {
-  pre_startup_setup();
-  pre_startup_checks();
+  my ($self) = @_;
+  $self->pre_startup_setup;
+  $self->pre_startup_checks;
 }
 
 sub require_main_code {
@@ -244,6 +253,9 @@ sub handle_request {
   Form::disconnect_standard_dbh;
 
   $::lxdebug->end_request;
+
+  $self->_watch_for_changed_files;
+
   $::lxdebug->leave_sub;
 }
 
@@ -319,6 +331,35 @@ sub _route_controller_request {
   return ($controller, $action);
 }
 
+sub _cache_file_modification_times {
+  my ($self) = @_;
+
+  return unless $self->_interface_is_fcgi && $::lx_office_conf{debug}->{restart_fcgi_process_on_changes};
+
+  require File::Find;
+  require POSIX;
+
+  my $wanted = sub {
+    return unless $File::Find::name =~ m/\.(?:pm|f?pl|html|conf|conf\.default)$/;
+    $fcgi_file_cache{ $File::Find::name } = (stat $File::Find::name)[9];
+  };
+
+  my $cwd = POSIX::getcwd();
+  File::Find::find($wanted, map { "${cwd}/${_}" } qw(config bin SL templates/webpages));
+  map { my $name = "${cwd}/${_}"; $fcgi_file_cache{$name} = (stat $name)[9] } qw(admin.pl dispatcher.fpl);
+}
+
+sub _watch_for_changed_files {
+  my ($self) = @_;
+
+  return unless $self->_interface_is_fcgi && $::lx_office_conf{debug}->{restart_fcgi_process_on_changes};
+
+  my $ok = all { (stat($_))[9] == $fcgi_file_cache{$_} } keys %fcgi_file_cache;
+  return if $ok;
+  $::lxdebug->message(LXDebug::DEBUG1(), "Program modifications detected. Restarting.");
+  exit;
+}
+
 sub get_standard_filehandles {
   my $self = shift;
 
diff --git a/config/lx_office.conf.default b/config/lx_office.conf.default
index 41bfa54a2..9df72a427 100644
--- a/config/lx_office.conf.default
+++ b/config/lx_office.conf.default
@@ -231,5 +231,10 @@ show_debug_menu = 0
 # not removed and remain in the "users" directory.
 keep_temp_files = 0
 
+# Restart the FastCGI process if changes to the program or template
+# files have been detected. The restart will occur after the request
+# in which the changes have been detected has completed.
+restart_fcgi_process_on_changes = 0
+
 # The file name where the debug messages are written to.
 file_name = /tmp/lx-office-debug.log
-- 
2.20.1