From 9218d819b7570950ca7de64c8a482ffa376c0800 Mon Sep 17 00:00:00 2001
From: "Heiko Schlittermann (HS12-RIPE)" <hs@schlittermann.de>
Date: Sun, 6 Nov 2016 23:31:28 +0100
Subject: [PATCH 1/1] Failing Autoupdate doesn't kill the job anymor, just
 issues a warning.

---
 build-farm.conf.template |  7 ++++++
 run_branches             | 48 ++++++++++++++++++++++++----------------
 run_build                |  3 ---
 3 files changed, 36 insertions(+), 22 deletions(-)

diff --git a/build-farm.conf.template b/build-farm.conf.template
index fdaa929..268e279 100644
--- a/build-farm.conf.template
+++ b/build-farm.conf.template
@@ -66,6 +66,13 @@ my $farm_user_name = 'farm';
     animal => "alias_assigned_by_build_team",
     secret => "secret_assigned_by_build_team",
 
+    # allow automatic updates of the buildfarm client code.
+    # Leave it *unset* to get the default behaviour, set it
+    # to some false value to disable automatic updates or set it
+    # to the name of the remote Git repo you follow for your
+    # buildfarm-client code.
+    #auto_update => 'origin',
+
     # if force_every is a scalar it will be used on all branches, like this
     # for legacy reasons:
     # force_every => 336 , # max hours between builds, undef or 0 = unforced
diff --git a/run_branches b/run_branches
index 8ee1f9f..7506a52 100755
--- a/run_branches
+++ b/run_branches
@@ -78,35 +78,45 @@ $branch = 'global';
 require $buildconf;
 
 # Check if auto-update is wanted and possible
-if (not exists $EximBuild::Conf{auto_update} or $EximBuild::Conf{auto_update})
-{
-    my $remote = $EximBuild::Conf{auto_update} // 'origin';
+eval {
+    if (not exists $EximBuild::Conf{auto_update} or $EximBuild::Conf{auto_update})
+    {
+	my $remote = $EximBuild::Conf{auto_update} // 'origin';
 
-    die "$0: auto-update not possible: need write permissions in @{[cwd]}\n"
-	if not -w '.';
+	die "auto-update not possible: need write permissions in @{[cwd]}\n"
+	    if not -w '.';
 
-    # Get information about our remote and calculate the chance for a
-    # successfull auto-updat. Based on:
-    # http://stackoverflow.com/questions/3258243/check-if-pull-needed-in-git
-    system("git fetch $remote") == 0 or die $? >> 8;
-    my ($upstream, $local, $base) = qx'git rev-parse ...@{upstream}';   die $? >> 8 if $?;
-    $base =~ s/^\^//;
+	# Get information about our remote and calculate the chance for a
+	# successfull auto-updat. Based on:
+	# http://stackoverflow.com/questions/3258243/check-if-pull-needed-in-git
+	system("git fetch $remote") == 0 or die "'git fetch $remote' failed\n";
+	my ($upstream, $local, $base) = qx'git rev-parse ...@{upstream}' or die "'git rev-parse' failed\n";
 
-    if ($upstream ne $local) {
+	$base =~ s/^\^//;
+
+	if ($upstream ne $local) {
+
+	    if ($base ne $local) {
+		die "the merge base is not local anymore. Refusing to `git pull`\n"
+	    }
 
-	if ($base ne $local) {
-	    warn "$0: the merge base is not local anymore. Refusing to `git pull`\n"
-	}
-	else {
 	    # if we're the merge base, the ff-only should work
-	    system('git pull --ff-only') == 0 or die $? >> 8;
+	    # except if there are local changes. We won't stop, if we
+	    # fail to update, but we'll issue a warning
+	    system("git pull --ff-only $remote") == 0 or die "git pull --ff-only\n";
 
-	    say "$0: re-execute after update";
-	    chdir $CALLED{cwd} or die "$0: Can't chdir to $CALLED{cwd}: $!\n";
+	    say "re-execute after update";
+	    chdir $CALLED{cwd} or die "Can't chdir to $CALLED{cwd}: $!\n";
 	    exec $CALLED{argv0}, @{$CALLED{argv}};
 	    die "Can't re-exec\n";
 	}
     }
+};
+
+if ($@) {
+    chomp $@;
+    warn "Automatic updated failed with `$@'\n"
+	."Continue anyway\n";
 }
 
 unless (
diff --git a/run_build b/run_build
index 9a2fcb9..77c6de0 100755
--- a/run_build
+++ b/run_build
@@ -160,9 +160,6 @@ require $buildconf;
 #use Data::Dumper;
 #die Dumper \%EximBuild::conf;
 
-# some basic checks
-die "$0: need read/write permissions on '$EximBuild::conf{global_lock_dir}': $!\n"
-    if not -r -w $EximBuild::conf{global_lock_dir};
 
 # Does not seem to be necessary
 #die "$0: permissions on '$EximBuild::conf{build_root}' should be >= 0775\n"
-- 
2.30.2