kernel-yocto.bbclass: Fixup do_kernel_configcheck usage of KMETA

The do_kernel_configcheck task requires a meta directory, normally
set by ${KMETA}. The meta directory is taken as a relative path
from ${S}:

        outfile = "{}/{}/cfg/mismatch.txt".format( s, kmeta )

However, when checking for the presence of ${KMETA} the current
working directory is searched. This will almost always fail and
"kgit --meta" is used instead. If the user does have a path in
their current working directory that matches the ${KMETA}
variable but the path is not present within the kernel source
directory, the build will fail if it tries to write config errors/
warnings to that path.

If ${KMETA} is not set, the same problem exists with the hard-coded
"meta" directory.

Fix these issues by checking for ${KMETA} within ${S} rather than
the current working directory. Additionally, drop the hardcoded
backup directory "meta" as it hasn't been functioning and
probably has no users

Signed-off-by: Russ Dill <russ.dill@nikolamotor.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index 1d5a8cdf29a9c98a92031fa0ee0e5691983352e4..4cb638864c4c1d46fc776647dd5c97e5749d8a46 100644 (file)
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -521,15 +521,15 @@ python do_config_analysis() {
 python do_kernel_configcheck() {
     import re, string, sys, subprocess
 
-    # if KMETA isn't set globally by a recipe using this routine, we need to
-    # set the default to 'meta'. Otherwise, kconf_check is not passed a valid
-    # meta-series for processing
-    kmeta = d.getVar("KMETA") or "meta"
-    if not os.path.exists(kmeta):
-        kmeta = subprocess.check_output(['kgit', '--meta'], cwd=d.getVar('S')).decode('utf-8').rstrip()
-
     s = d.getVar('S')
 
+    # if KMETA isn't set globally by a recipe using this routine, use kgit to
+    # locate or create the meta directory. Otherwise, kconf_check is not
+    # passed a valid meta-series for processing
+    kmeta = d.getVar("KMETA")
+    if not kmeta or not os.path.exists('{}/{}'.format(s,kmeta)):
+        kmeta = subprocess.check_output(['kgit', '--meta'], cwd=d.getVar('S')).decode('utf-8').rstrip()
+
     env = os.environ.copy()
     env['PATH'] = "%s:%s%s" % (d.getVar('PATH'), s, "/scripts/util/")
     env['LD'] = d.getVar('KERNEL_LD')