[OE-core] [PATCH 2/2] kernel.bbclass: fix do_unpack function when S ends with slash

[Martin Jansa]

* slash at the end causes os.symlink(kernsrc, s) to use s as
  directory name and fails with:

ERROR: Error executing a python function in /OE/build/owpb/webos-ports/meta-smartphone/meta-samsung/recipes-kernel/linux/linux-samsung-tuna_git.bb:

The stack trace of python calls that resulted in this exception/failure was:
File: 'base_do_unpack', lineno: 26, function: <module>
     0022:        subprocess.call(d.expand("mv /OE/build/owpb/webos-ports/tmp-glibc/work/maguro-webos-linux-gnueabi/linux-samsung-tuna/3_3.0.72+gitrAUTOINC+f8ed73f94a-r12/git/ /OE/build/owpb/webos-ports/tmp-glibc/sysroots/maguro/usr/src/kernel"), shell=True)
     0023:        os.symlink(kernsrc, s)
     0024:
     0025:
 *** 0026:base_do_unpack(d)
     0027:
File: 'base_do_unpack', lineno: 23, function: base_do_unpack
     0019:        bb.utils.mkdirhier(kernsrc)
     0020:        bb.utils.remove(kernsrc, recurse=True)
     0021:        import subprocess
     0022:        subprocess.call(d.expand("mv /OE/build/owpb/webos-ports/tmp-glibc/work/maguro-webos-linux-gnueabi/linux-samsung-tuna/3_3.0.72+gitrAUTOINC+f8ed73f94a-r12/git/ /OE/build/owpb/webos-ports/tmp-glibc/sysroots/maguro/usr/src/kernel"), shell=True)
 *** 0023:        os.symlink(kernsrc, s)
     0024:
     0025:
     0026:base_do_unpack(d)
     0027:
Exception: OSError: [Errno 2] No such file or directory

ERROR: Function failed: base_do_unpack
ERROR: Logfile of failure stored in: /OE/build/owpb/webos-ports/tmp-glibc/work/maguro-webos-linux-gnueabi/linux-samsung-tuna/3_3.0.72+gitrAUTOINC+f8ed73f94a-r12/temp/log.do_unpack.17042
ERROR: Task 0 (/OE/build/owpb/webos-ports/meta-smartphone/meta-samsung/recipes-kernel/linux/linux-samsung-tuna_git.bb, do_unpack) failed with exit code '1'

Signed-off-by: Martin Jansa <Martin.Jansa at gmail.com>
---
 meta/classes/kernel.bbclass | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 3b77d00..5541c94 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -43,6 +43,9 @@ python __anonymous () {
 do_unpack[cleandirs] += " ${S} ${STAGING_KERNEL_DIR} ${B}"
 base_do_unpack_append () {
     s = d.getVar("S", True)
+    if s[-1] == '/':
+        # drop trailing slash, so that os.symlink(kernsrc, s) doesn't use s as directory name and fail
+        s=s[:-1]
     kernsrc = d.getVar("STAGING_KERNEL_DIR", True)
     if s != kernsrc:
         bb.utils.mkdirhier(kernsrc)
-- 
2.2.1