[OE-core] [PATCH 1/1] combo-layer: handle unset dest_dir in sanity_check()

[Patrick Ohly]

The previous "clean up dest_dir checking" patch (f8cdbe7497) improved
handling of empty dest_dir but made handling of unset dest_dir worse:
instead showing the "Option dest_dir is not defined for component ..."
error, it fails with a Python exception.

Avoid that by providing a sane fallback for the unset case. With that
change, dest_dir is no longer strictly required, but the check for it
is kept to ensure that a combo-layer.conf also works with older
combo-layer versions.

[Yocto #7773]

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 scripts/combo-layer | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/combo-layer b/scripts/combo-layer
index b0b7c28..698d3e3 100755
--- a/scripts/combo-layer
+++ b/scripts/combo-layer
@@ -145,8 +145,10 @@ class Configuration(object):
                     msg = "%s\nOption %s is not defined for component %s" %(msg, option, name)
                     missing_options.append(option)
             # Sanitize dest_dir so that we do not have to deal with edge cases
-            # (empty string, double slashes) in the rest of the code.
-            dest_dir = os.path.normpath(self.repos[name]["dest_dir"])
+            # (unset, empty string, double slashes) in the rest of the code.
+            # It not being set will still be flagged as error because it is
+            # listed as required option above; that could be changed now.
+            dest_dir = os.path.normpath(self.repos[name].get("dest_dir", "."))
             self.repos[name]["dest_dir"] = "." if not dest_dir else dest_dir
         if msg != "":
             logger.error("configuration file %s has the following error: %s" % (self.conffile,msg))
-- 
2.1.4