bb.fetch2: Add git unpack

The git download method clones the git repository to the local machine. The unpack process
can be optimised to be a local to local machine clone or a direct readtree operation to the
destination using git.will clone git repo to local, so git unpack can be simplified
to only checkouting the code to the work dir. For fullclone case, we also
need to manually copy all the ref info, which is needed by the later do_kernel_checkout().
Rather than use hardlinks, we reference the repository using alternatives since the
download directory may be on a different filesystem.

[Change to use -s by Richard Purdie]

Signed-off-by: Yu Ke <ke.yu@intel.com>

diff --git a/bitbake/lib/bb/fetch2/git.py b/bitbake/lib/bb/fetch2/git.py
index 08daa20313e31ff8088ad248370ea4cb3f3982b9..0a1818f8256548e154e3738e3f70195656b461b8 100644 (file)
--- a/bitbake/lib/bb/fetch2/git.py
+++ b/bitbake/lib/bb/fetch2/git.py
@@ -194,6 +194,31 @@ class Git(Fetch):
         os.chdir(ud.clonedir)
         bb.utils.prunedir(codir)
 
+    def unpack(self, ud, destdir, d):
+        """ unpack the downloaded src to destdir"""
+
+        subdir = ud.parm.get("subpath", "")
+        if subdir != "":
+            readpathspec = ":%s" % (subdir)
+        else:
+            readpathspec = ""
+
+        destdir = os.path.join(destdir, "git/")
+        if os.path.exists(destdir):
+            bb.utils.prunedir(destdir)
+
+        if 'fullclone' in ud.parm:
+            runfetchcmd("git clone -s -n %s %s" % (ud.clonedir, destdir), d)
+            if os.path.exists("%s/.git/refs/remotes/origin" % ud.clonedir):
+                runfetchcmd("cp -af %s/.git/refs/remotes/origin/* %s/.git/refs/remotes/origin/" %(ud.clonedir, destdir), d)
+            if os.path.exists("%s/.git/packed-refs" % ud.clonedir):
+                runfetchcmd("cp -af %s/.git/packed-refs %s/.git/" %(ud.clonedir, destdir), d)
+        else:
+            os.chdir(ud.clonedir)
+            runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.tag, readpathspec), d)
+            runfetchcmd("%s checkout-index -q -f --prefix=%s -a" % (ud.basecmd, destdir), d)
+        return True
+
     def supports_srcrev(self):
         return True