1 files changed, 14 insertions, 1 deletions

diff --git a/meta/lib/oe/buildcfg.py b/meta/lib/oe/buildcfg.py
index a749fc5303..a7549f1e22 100644
--- a/meta/lib/oe/buildcfg.py
+++ b/meta/lib/oe/buildcfg.py
@@ -37,4 +37,17 @@ def get_metadata_git_revision(path, d):
     except bb.process.ExecutionError:
         rev = '<unknown>'
     return rev.strip()
-         
+
+def is_layer_modified(path):
+    try:
+        subprocess.check_output("""cd %s; export PSEUDO_UNLOAD=1; set -e;
+                                git diff --quiet --no-ext-diff
+                                git diff --quiet --no-ext-diff --cached""" % path,
+                                shell=True,
+                                stderr=subprocess.STDOUT)
+        return ""
+    except subprocess.CalledProcessError as ex:
+        # Silently treat errors as "modified", without checking for the
+        # (expected) return code 1 in a modified git repo. For example, we get
+        # output and a 129 return code when a layer isn't a git repo at all.
+        return " -- modified"