[OE-core] [PATCH 2/2] wic: Make exec_native_command() fail if a command isn't found

[Tom Zanussi]

Because exec_cmd() return values can in certain cases be non-zero yet
non-fatal, we don't want to automatically make them fatal (though
there should at least be a warning in such cases, which this patch
also does); non-zero return values are definitely fatal however if
they mean that a native command wasn't found, so have
exec_native_cmd() check the return value of exec_cmd() for that case,
and bail out if so.

[YOCTO #5835]

Signed-off-by: Tom Zanussi <tom.zanussi at linux.intel.com>
---
 scripts/lib/mic/utils/oe/misc.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/scripts/lib/mic/utils/oe/misc.py b/scripts/lib/mic/utils/oe/misc.py
index d65b77a..7ad3aa9 100644
--- a/scripts/lib/mic/utils/oe/misc.py
+++ b/scripts/lib/mic/utils/oe/misc.py
@@ -51,7 +51,7 @@ def exec_cmd(cmd_and_args, as_shell = False, catch = 3):
         # parted always fails to reload part table with loop devices. This
         # prevents us from distinguishing real errors based on return
         # code.
-        msger.debug("WARNING: %s returned '%s' instead of 0" % (args[0], rc))
+        msger.warning("WARNING: %s returned '%s' instead of 0" % (cmd_and_args, rc))
 
     return (rc, out)
 
@@ -82,7 +82,14 @@ def exec_native_cmd(cmd_and_args, native_sysroot, catch = 3):
     args = cmd_and_args.split()
     msger.debug(args)
 
-    return exec_cmd(native_cmd_and_args, True, catch)
+    rc, out = exec_cmd(native_cmd_and_args, True, catch)
+
+    if rc == 127: # shell command-not-found
+        msger.error("A native (host) program required to build the image "
+                    "was not found (see details above). Please make sure "
+                    "it's installed and try again.")
+
+    return (rc, out)
 
 
 def exec_native_cmd_quiet(cmd_and_args, native_sysroot):
-- 
1.8.3.1