[PATCH] metadata_scm: use rev-parse rather than show-ref

[Chris Larson <kergoth@gmail.com>]

From: Chris Larson <chris_larson@mentor.com>

show-ref will show all matching refs, so a "show-ref HEAD" will show not just
the local HEAD, but the fetched remote ones as well.  This isn't what we want
for this function, so change it to use rev-parse with --verify, and also
change it to use --short, to shorten the hash to a more palatable length.

Signed-off-by: Chris Larson <chris_larson@mentor.com>
---
 classes/metadata_scm.bbclass |   22 +++++++++++++---------
 1 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/classes/metadata_scm.bbclass b/classes/metadata_scm.bbclass
index ffc6a8a..f79ea19 100644
--- a/classes/metadata_scm.bbclass
+++ b/classes/metadata_scm.bbclass
@@ -63,14 +63,18 @@ def base_get_metadata_svn_revision(path, d):
 	return revision
 
 def base_get_metadata_git_branch(path, d):
-	branch = os.popen('cd %s; PATH=%s git symbolic-ref HEAD 2>/dev/null' % (path, d.getVar("PATH", 1))).read().rstrip()
-
-	if len(branch) != 0:
-		return branch.replace("refs/heads/", "")
-	return "<unknown>"
+    try:
+        rev = oe_run(d, ["git", "symbolic-ref", "HEAD"], cwd=path).rstrip()
+    except oe.process.CmdError:
+        rev = "<unknown>"
+    else:
+        rev = rev.replace("refs/heads/", "")
+    return rev
 
 def base_get_metadata_git_revision(path, d):
-	rev = os.popen("cd %s; PATH=%s git show-ref HEAD 2>/dev/null" % (path, d.getVar("PATH", 1))).read().split(" ")[0].rstrip()
-	if len(rev) != 0:
-		return rev
-	return "<unknown>"
+    try:
+        rev = oe_run(d, ["git", "rev-parse", "--verify", "--short", "HEAD"],
+                     cwd=path).rstrip()
+    except oe.process.CmdError:
+        rev = "<unknown>"
+    return rev
-- 
1.7.2.3