fetch2/git: enhance the unpack by using "git checkout"

current git fetcher unpack method only checkout index and working tree,
but did not did not update the git branch in ref/heads, so user may not
get right info in ${S} by using git.

this patch enhance the unpack by using git checkout to fix this issue.

Fix bug [YOCTO #1089]

(Bitbake rev: c0eb89054aef4957966f98b44e7f3cce14fb337a)

Signed-off-by: Yu Ke <ke.yu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/bitbake/lib/bb/fetch2/git.py b/bitbake/lib/bb/fetch2/git.py
index 3b8965e49c..ae44a49b2a 100644
--- a/bitbake/lib/bb/fetch2/git.py
+++ b/bitbake/lib/bb/fetch2/git.py
@@ -213,8 +213,11 @@ class Git(FetchMethod):
         runfetchcmd("git clone -s -n %s %s" % (ud.clonedir, destdir), d)
         if not ud.nocheckout:
             os.chdir(destdir)
-            runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.revisions[ud.names[0]], readpathspec), d)
-            runfetchcmd("%s checkout-index -q -f -a" % ud.basecmd, d)
+            if subdir != "":
+                runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.revisions[ud.names[0]], readpathspec), d)
+                runfetchcmd("%s checkout-index -q -f -a" % ud.basecmd, d)
+            else:
+                runfetchcmd("%s checkout %s" % (ud.basecmd, ud.revisions[ud.names[0]]), d)
         return True
 
     def clean(self, ud, d):