wic: add support to look in all layers and get .wks file

.wks file are looked in 'scripts/lib/image/canned-wks' directory on all
BBLAYERS variable returned by bitbake environment. If found, it will
be used.

The user could create your own .wks and keep it inside its layers. For
now the path must be <layer-dir>/scripts/lib/image/canned-wks.

(From OE-Core rev: 1f3e312211f277a1befd707a59a0c0a9bf6cbcbc)

Signed-off-by: João Henrique Ferreira de Freitas <joaohf@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/image/engine.py

@@ -90,6 +90,20 @@ def find_artifacts(image_name):
 
 
 CANNED_IMAGE_DIR = "lib/image/canned-wks" # relative to scripts
+SCRIPTS_CANNED_IMAGE_DIR = "scripts/" + CANNED_IMAGE_DIR
+
+def build_canned_image_list(dl):
+    layers_path = get_bitbake_var("BBLAYERS")
+    canned_wks_layer_dirs = []
+
+    for layer_path in layers_path.split():
+        path = os.path.join(layer_path, SCRIPTS_CANNED_IMAGE_DIR)
+        canned_wks_layer_dirs.append(path)
+
+    path = os.path.join(dl, CANNED_IMAGE_DIR)
+    canned_wks_layer_dirs.append(path)
+
+    return canned_wks_layer_dirs
 
 def find_canned_image(scripts_path, wks_file):
     """
@@ -97,15 +111,16 @@ def find_canned_image(scripts_path, wks_file):
 
     Return False if not found
     """
-    canned_wks_dir = os.path.join(scripts_path, CANNED_IMAGE_DIR)
+    layers_canned_wks_dir = build_canned_image_list(scripts_path)
 
-    for root, dirs, files in os.walk(canned_wks_dir):
-        for file in files:
-            if file.endswith("~") or file.endswith("#"):
-                continue
-            if file.endswith(".wks") and wks_file + ".wks" == file:
-                fullpath = os.path.join(canned_wks_dir, file)
-                return fullpath
+    for canned_wks_dir in layers_canned_wks_dir:
+        for root, dirs, files in os.walk(canned_wks_dir):
+            for file in files:
+                if file.endswith("~") or file.endswith("#"):
+                    continue
+                if file.endswith(".wks") and wks_file + ".wks" == file:
+                    fullpath = os.path.join(canned_wks_dir, file)
+                    return fullpath
     return None
 
 
@@ -113,32 +128,31 @@ def list_canned_images(scripts_path):
     """
     List the .wks files in the canned image dir, minus the extension.
     """
-    canned_wks_dir = os.path.join(scripts_path, CANNED_IMAGE_DIR)
+    layers_canned_wks_dir = build_canned_image_list(scripts_path)
 
-    for root, dirs, files in os.walk(canned_wks_dir):
-        for file in files:
-            if file.endswith("~") or file.endswith("#"):
-                continue
-            if file.endswith(".wks"):
-                fullpath = os.path.join(canned_wks_dir, file)
-                f = open(fullpath, "r")
-                lines = f.readlines()
-                for line in lines:
-                    desc = ""
-                    idx = line.find("short-description:")
-                    if idx != -1:
-                        desc = line[idx + len("short-description:"):].strip()
-                        break
-                basename = os.path.splitext(file)[0]
-                print "  %s\t\t%s" % (basename, desc)
+    for canned_wks_dir in layers_canned_wks_dir:
+        for root, dirs, files in os.walk(canned_wks_dir):
+            for file in files:
+                if file.endswith("~") or file.endswith("#"):
+                    continue
+                if file.endswith(".wks"):
+                    fullpath = os.path.join(canned_wks_dir, file)
+                    f = open(fullpath, "r")
+                    lines = f.readlines()
+                    for line in lines:
+                        desc = ""
+                        idx = line.find("short-description:")
+                        if idx != -1:
+                            desc = line[idx + len("short-description:"):].strip()
+                            break
+                    basename = os.path.splitext(file)[0]
+                    print "  %s\t\t%s" % (basename.ljust(30), desc)
 
 
 def list_canned_image_help(scripts_path, fullpath):
     """
     List the help and params in the specified canned image.
     """
-    canned_wks_dir = os.path.join(scripts_path, CANNED_IMAGE_DIR)
-
     f = open(fullpath, "r")
     lines = f.readlines()
     found = False

scripts/wic

@@ -214,6 +214,12 @@ def wic_list_subcommand(args, usage_str):
 
     (options, args) = parser.parse_args(args)
 
+    bitbake_env_lines = find_bitbake_env_lines(None)
+    if not bitbake_env_lines:
+        print "Couldn't get bitbake environment, exiting."
+        sys.exit(1)
+    set_bitbake_env_lines(bitbake_env_lines)
+
     if not wic_list(args, scripts_path, options.properties_file):
         logging.error("Bad list arguments, exiting\n")
         parser.print_help()