classes/patch: avoid backtrace when patch does not apply

We don't need to see a Python stack backtrace when a patch does not
apply, just the error output from patch, so trap these kinds of errors
and ensure that we display the message and fail the task and nothing
else.

Fixes [YOCTO #1143]

(From OE-Core rev: ce6c80a1e68c2af0b4b5fa27582ad9c9f119e5c1)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/patch.bbclass

@@ -155,7 +155,10 @@ python patch_do_patch() {
 			patchset.Import({"file":local, "strippath": parm['striplevel']}, True)
 		except Exception as exc:
 			bb.fatal(str(exc))
-		resolver.Resolve()
+		try:
+			resolver.Resolve()
+		except bb.BBHandledException as e:
+			bb.fatal(str(e))
 }
 patch_do_patch[vardepsexclude] = "PATCHRESOLVE"
 

meta/lib/oe/patch.py

@@ -2,14 +2,14 @@ import oe.path
 import os
 import bb.utils, bb.msg, bb.data, bb.fetch2
 
-class NotFoundError(Exception):
+class NotFoundError(bb.BBHandledException):
     def __init__(self, path):
         self.path = path
 
     def __str__(self):
         return "Error: %s not found." % self.path
 
-class CmdError(Exception):
+class CmdError(bb.BBHandledException):
     def __init__(self, exitstatus, output):
         self.status = exitstatus
         self.output = output
@@ -207,7 +207,7 @@ class QuiltTree(PatchSet):
         # read series -> self.patches
         seriespath = os.path.join(self.dir, 'patches', 'series')
         if not os.path.exists(self.dir):
-            raise Exception("Error: %s does not exist." % self.dir)
+            raise NotFoundError(self.dir)
         if os.path.exists(seriespath):
             series = file(seriespath, 'r')
             for line in series.readlines():
@@ -228,7 +228,7 @@ class QuiltTree(PatchSet):
                 if sys.exc_value.output.strip() == "No patches applied":
                     return
                 else:
-                    raise sys.exc_value
+                    raise
             output = [val for val in output.split('\n') if not val.startswith('#')]
             for patch in self.patches:
                 if os.path.basename(patch["quiltfile"]) == output[-1]:
@@ -336,7 +336,7 @@ class NOOPResolver(Resolver):
         except Exception:
             import sys
             os.chdir(olddir)
-            raise sys.exc_value
+            raise
 
 # Patch resolver which relies on the user doing all the work involved in the
 # resolution, with the exception of refreshing the remote copy of the patch