Fix errors showing up with layers that aren't git repos

This should really be applied to both master and jethro.

The following changes since commit e44ed8c18e395b9c055aefee113b90708e8a8a2f:

build-appliance-image: Update to jethro head revision (2015-11-03 14:02:57 +0000)

are available in the git repository at:

git://git.openembedded.org/openembedded-core-contrib paule/metadata_scm
http://cgit.openembedded.org/cgit.cgi/openembedded-core-contrib/log/?h=paule/metadata_scm

Paul Eggleton (1):
classes/metadata_scm: fix git errors showing up on non-git
repositories

 meta/classes/metadata_scm.bbclass | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

2.1.0

Fixes the following error showing up for layers that aren't a git repo (or aren't parented by one):

fatal: Not a git repository (or any of the parent directories): .git

This was because we weren't intercepting stderr. We might as well just use bb.process.run() here which does that and returns stdout and stderr separately.

(This was a regression that came in with OE-Core revision 3aac11076e22ac4fea48f5404110bb959547a9fe).

Fixes [YOCTO #8661].

---
 meta/classes/metadata_scm.bbclass | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

index 64465fa..0f7f423 100644
@@ -65,19 +65,19 @@ def base_get_metadata_svn_revision(path, d):
     return revision
 
 def base_get_metadata_git_branch(path, d):
-    import subprocess
+    import bb.process
 
     try:
-        return subprocess.check_output(["git", "rev-parse", "--abbrev-ref", "HEAD"],
-                                       cwd=path).strip()
-    except:
-        return "<unknown>"
+        rev, _ = bb.process.run('git rev-parse --abbrev-ref HEAD', cwd=path)
+    except bb.process.ExecutionError:
+        rev = '<unknown>'
+    return rev.strip()
 
 def base_get_metadata_git_revision(path, d):
-    import subprocess
+    import bb.process
 
     try:
-        return subprocess.check_output(["git", "rev-parse", "HEAD"],
-                                       cwd=path).strip()
-    except:
-        return "<unknown>"
+        rev, _ = bb.process.run('git rev-parse HEAD', cwd=path)
+    except bb.process.ExecutionError:
+        rev = '<unknown>'
+    return rev.strip()

2.1.0