Revamp t/21-once.t

[perl/modules/rgit.git] / t / lib / App / Rgit / TestUtils.pm

diff --git a/t/lib/App/Rgit/TestUtils.pm b/t/lib/App/Rgit/TestUtils.pm
new file mode 100644 (file)
index 0000000..07b1bd7
--- /dev/null
+++ b/t/lib/App/Rgit/TestUtils.pm
@@ -0,0 +1,69 @@
+package App::Rgit::TestUtils;
+
+use strict;
+use warnings;
+
+use Cwd        qw/abs_path/;
+use File::Temp qw/tempfile/;
+use POSIX      qw/WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG SIGINT SIGQUIT/;
+
+BEGIN {
+ no warnings 'redefine';
+ *WIFEXITED   = sub { 1 }             unless eval { WIFEXITED(0);   1 };
+ *WEXITSTATUS = sub { shift() >> 8 }  unless eval { WEXITSTATUS(0); 1 };
+ *WIFSIGNALED = sub { shift() & 127 } unless eval { WIFSIGNALED(0); 1 };
+}
+
+use base qw/Exporter/;
+
+our @EXPORT_OK = (qw/can_run_git/);
+
+sub can_run_git {
+ my ($fh, $filename) = tempfile(UNLINK => 1);
+
+ my @ret = (1, '');
+
+CHECK:
+ {
+  my @args = (
+   abs_path($filename),
+   'version',
+  );
+
+  my $git = 't/bin/git';
+  if ($^O eq 'MSWin32') {
+   unless (-x $git) {
+    $git .= '.bat';
+    unless (-x $git) {
+     @ret = (0, "no $git executable");
+     last CHECK;
+    }
+   }
+  } else {
+   unless (-x $git) {
+    @ret = (0, "no $git executable");
+    last CHECK;
+   }
+  }
+
+  system { $git } $git, @args;
+
+  if ($? == -1) {
+   @ret = (0, $! || "unknown");
+   last CHECK;
+  }
+
+  my $status;
+  $status = WEXITSTATUS($?) if WIFEXITED($?);
+
+  if (WIFSIGNALED($?)) {
+   @ret = (0, 'process recieved signal ' . WTERMSIG($?));
+  } elsif ($status) {
+   @ret = (0, "process exited with code $status");
+  }
+ }
+
+ return wantarray ? @ret : $ret[0];
+}
+
+1;