package.bbclass: fix python unclosed file ResourceWarning

Fix the following warning.

  ResourceWarning: unclosed file <_io.TextIOWrapper name='/.../systemd/1_239-r0/debugsources.list' mode='a' encoding='UTF-8'>

(From OE-Core rev: 91810a57f0edd8b37c5f3f989a5aca69d9a40b37)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index d1e9138c66..0fe9576b4d 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -368,7 +368,8 @@ def append_source_info(file, sourcefile, d, fatal=True):
     # is still assuming that.
     debuglistoutput = '\0'.join(debugsources) + '\0'
     lf = bb.utils.lockfile(sourcefile + ".lock")
-    open(sourcefile, 'a').write(debuglistoutput)
+    with open(sourcefile, 'a') as sf:
+        sf.write(debuglistoutput)
     bb.utils.unlockfile(lf)