devtool: refactor code for getting local recipe file

We're doing this in a couple of places, let's just find the recipe file
if it exists within the workspace (which it will if it's been added
through "devtool add") when we read in the workspace.

(From OE-Core rev: 81cf5580993c99050e3f4d6d891bc67534721487)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/devtool

@@ -112,8 +112,18 @@ def read_workspace():
                 res = externalsrc_re.match(line.rstrip())
                 if res:
                     pn = res.group(2) or os.path.splitext(os.path.basename(fn))[0].split('_')[0]
+                    # Find the recipe file within the workspace, if any
+                    bbfile = os.path.basename(fn).replace('.bbappend', '.bb').replace('%', '*')
+                    recipefile = glob.glob(os.path.join(config.workspace_path,
+                                                        'recipes',
+                                                        pn,
+                                                        bbfile))
+                    if recipefile:
+                        recipefile = recipefile[0]
                     workspace[pn] = {'srctree': res.group(3),
-                                     'bbappend': fn}
+                                     'bbappend': fn,
+                                     'recipefile': recipefile}
+                    logger.debug('Found recipe %s' % workspace[pn])
 
 def create_workspace(args, config, basepath, workspace):
     if args.layerpath: