devtool-source.bbclass: Support kernel-fragments/patch not in SRC_URI

When using a recipe space kernel-meta, scc files are added through
SRC_URI, but they may include corresponding kernel fragments or patches
that are not necessarily in SRC_URI.

For bitbake, this is not a problem because the kernel-yocto class adds
the path where the .scc file was found to includes which consequentially
makes the .cfg, .patch file available to the kernel build.

However, when using devtool, only files specified in SRC_URI are copied
to oe-local-files in devtool's workspace. So if the cfg/patch file is not in
SRC_URI, it won't be copied, causing a kernel build failure when trying
to find it.

This fix parses local .scc files in SRC_URI, copies the corresponding
.cfg/.patch file to devtool's workdir, and also adds it to local_files
so it is available when doing a devtool build for the kernel.

[YOCTO #12858]

v2: also supporting patch not in SRC_URI
v3: fix spacing issues

(From OE-Core rev: 5dffd5403664dfcc9e8e42fd3581d5cb70823d7e)

Signed-off-by: Jaewon Lee <jaewon.lee@xilinx.com>
Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandr@xilinx.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/devtool-source.bbclass

@@ -90,11 +90,23 @@ python devtool_post_unpack() {
                         fname in files])
         return ret
 
+    is_kernel_yocto = bb.data.inherits_class('kernel-yocto', d)
     # Move local source files into separate subdir
     recipe_patches = [os.path.basename(patch) for patch in
                         oe.recipeutils.get_recipe_patches(d)]
     local_files = oe.recipeutils.get_recipe_local_files(d)
 
+    if is_kernel_yocto:
+        for key in local_files.copy():
+            if key.endswith('scc'):
+                sccfile = open(local_files[key], 'r')
+                for l in sccfile:
+                    line = l.split()
+                    if line and line[0] in ('kconf', 'patch'):
+                        local_files[line[-1]] = os.path.join(os.path.dirname(local_files[key]), line[-1])
+                        shutil.copy2(os.path.join(os.path.dirname(local_files[key]), line[-1]), workdir)
+                sccfile.close()
+
     # Ignore local files with subdir={BP}
     srcabspath = os.path.abspath(srcsubdir)
     local_files = [fname for fname in local_files if