[OE-core] [RFC PATCH] base.bbclass: show git summary in BUILDCFG_HEADER

[Robert Yang]

It was:
meta
meta-yocto
meta-yocto-bsp    = "master:3a054dc27067efaae9150b465298d9c45d728f85"

Now:
meta
meta-yocto
meta-yocto-bsp    = "master:3a054dc base.bbclass: show git summary in BUILDCFG_HEADER"

The benefit is that we can easily know the top commit info rather than
query it again in the git repo.

Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 meta/classes/base.bbclass         |    2 +-
 meta/classes/metadata_scm.bbclass |    6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index c0d2c8ec8..f5abb88 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -244,7 +244,7 @@ def get_layers_branch_rev(d):
     layers = (d.getVar("BBLAYERS", True) or "").split()
     layers_branch_rev = ["%-17s = \"%s:%s\"" % (os.path.basename(i), \
         base_get_metadata_git_branch(i, None).strip(), \
-        base_get_metadata_git_revision(i, None)) \
+        base_get_metadata_git_revision_and_summary(i, None)) \
             for i in layers]
     i = len(layers_branch_rev)-1
     p1 = layers_branch_rev[i].find("=")
diff --git a/meta/classes/metadata_scm.bbclass b/meta/classes/metadata_scm.bbclass
index ba0edf9..133a647 100644
--- a/meta/classes/metadata_scm.bbclass
+++ b/meta/classes/metadata_scm.bbclass
@@ -80,3 +80,9 @@ def base_get_metadata_git_revision(path, d):
             return rev
     return "<unknown>"
 
+def base_get_metadata_git_revision_and_summary(path, d):
+    f = os.popen("cd %s; git log -n 1 --abbrev-commit --pretty=oneline -- 2>&1" % path)
+    data = f.readline()
+    if f.close() is None:
+            return data
+    return "<unknown>"
-- 
1.7.9.5