cooker: ensure monkey-patching in collect_bbfiles() gets undone on errorpaule/bb-watch-fixes

In collect_bbfiles() we're monkey-patching os.listdir in order to find
which directories to watch, and then undoing that when we're finished -
however if an exception occurred for any reason there was nothing to
ensure the latter occurred. This may not have caused any issues, but as
this kind of thing really ought to be secured using try...finally just
in case, so do that.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

1 files changed, 19 insertions, 19 deletions

diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 6de04fcba..73a2fef28 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -1695,25 +1695,25 @@ class CookerCollectFiles(object):
             return origlistdir(d)
 
         os.listdir = ourlistdir
-
-        # Can't use set here as order is important
-        newfiles = []
-        for f in files:
-            if os.path.isdir(f):
-                dirfiles = self.find_bbfiles(f)
-                for g in dirfiles:
-                    if g not in newfiles:
-                        newfiles.append(g)
-            else:
-                globbed = glob.glob(f)
-                if not globbed and os.path.exists(f):
-                    globbed = [f]
-                # glob gives files in order on disk. Sort to be deterministic.
-                for g in sorted(globbed):
-                    if g not in newfiles:
-                        newfiles.append(g)
-
-        os.listdir = origlistdir
+        try:
+            # Can't use set here as order is important
+            newfiles = []
+            for f in files:
+                if os.path.isdir(f):
+                    dirfiles = self.find_bbfiles(f)
+                    for g in dirfiles:
+                        if g not in newfiles:
+                            newfiles.append(g)
+                else:
+                    globbed = glob.glob(f)
+                    if not globbed and os.path.exists(f):
+                        globbed = [f]
+                    # glob gives files in order on disk. Sort to be deterministic.
+                    for g in sorted(globbed):
+                        if g not in newfiles:
+                            newfiles.append(g)
+        finally:
+            os.listdir = origlistdir
 
         bbmask = config.getVar('BBMASK')