Ohoh, fix loop in re-exec

[buildfarm-client.git] / run_branches

diff --git a/run_branches b/run_branches
index 20f37902519f25f30d7c802923668fde3162b750..e1d0b9e0d5026797fb3c4b159d99982e239f308d 100755 (executable)
--- a/run_branches
+++ b/run_branches
@@ -34,6 +34,11 @@ if ($0 =~ /(.*)\.pl$/) {
 
 # Most of the client code assumes that our working directory
 # is the client code directory.
+my %CALLED = (
+    cwd => cwd(),
+    argv0 => $0,
+    argv => [@ARGV],   # get a copy!
+);
 chdir $RealBin or die "$0: Can't chdir to '$RealBin': $!\n";
 say "Changed working directory to '$RealBin'" if -t;
 
@@ -75,19 +80,31 @@ 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';
+
     die "$0: 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 remote update') == 0 or die $? >> 8;
+    system("git fetch $remote") == 0 or die $? >> 8;
     my ($upstream, $local, $base) = qx'git rev-parse ...@{upstream}';   die $? >> 8 if $?;
     $base =~ s/^\^//;
 
     if ($upstream ne $local) {
-       die "$0: the merge base is not local anymore. Refusing to `git pull`\n"
-           if $base ne $local;
 
-       # if we're the merge base, the ff-only should workkkkkk
-       system 'git pull --ff-only'
+       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;
+           say "$0: re-execute after update";
+           chdir $CALLED{cwd} or die "$0: Can't chdir to $CALLED{cwd}: $!\n";
+           exec $CALLED{argv0}, @{$CALLED{argv}};
+           die "Can't re-exec\n";
+       }
     }
 }