devtool: standard: simplify get_staging_kver

The goal is to make this more Pythonic, as it was a little cryptic the
first time I looked at it.

(From OE-Core rev: 80285b0f9b716ebad87a2feb08f12f87d70c27e3)

Signed-off-by: Chris Laplante <chris.laplante@agilent.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 6 insertions, 8 deletions

diff --git a/scripts/lib/devtool/standard.py b/scripts/lib/devtool/standard.py
index 20c94616b2..0cdb9c6cfb 100644
--- a/scripts/lib/devtool/standard.py
+++ b/scripts/lib/devtool/standard.py
@@ -726,15 +726,13 @@ def _check_preserve(config, recipename):
 
 def get_staging_kver(srcdir):
     # Kernel version from work-shared
-    kerver = []
-    staging_kerVer=""
-    if os.path.exists(srcdir) and os.listdir(srcdir):
+    import itertools
+    try:
         with open(os.path.join(srcdir, "Makefile")) as f:
-            version = [next(f) for x in range(5)][1:4]
-            for word in version:
-                kerver.append(word.split('= ')[1].split('\n')[0])
-            staging_kerVer = ".".join(kerver)
-    return staging_kerVer
+            # Take VERSION, PATCHLEVEL, SUBLEVEL from lines 1, 2, 3
+            return ".".join(line.rstrip().split('= ')[1] for line in itertools.islice(f, 1, 4))
+    except FileNotFoundError:
+        return ""
 
 def get_staging_kbranch(srcdir):
     import bb.process