Made the patch utility return information to distinguish already patched files from successful patch application, and modified our checks extensions to signal when patches have been applied and a ccommand needs to be re-run.

- Legacy-Id: 18386

ietf/checks.py

@@ -319,6 +319,15 @@ def maybe_patch_library(app_configs, **kwargs):
                             "\tTarget files: %s\n") % (library_path, ',  '.join(force_str(i.target) for i in patch_set.items)),
                         id="datatracker.W0002",
                         ))
+                else:
+                    # Patch succeeded or was a no-op
+                    if not patch_set.already_patched:
+                        errors.append(
+                            checks.Error("Found an unpatched file, and applied the patch in %s" % (patch_file),
+                                hint="You will need to re-run the command now that the patch in place.",
+                                id="datatracker.E0022",
+                            )
+                        )
             else:
                 errors.append(checks.Warning(
                     "Could not parse patch file '%s'"%patch_file,

ietf/utils/patch.py

@@ -930,6 +930,7 @@ class PatchSet(object):
       if validhunks < len(p.hunks):
         if self._match_file_hunks(filename, p.hunks):
           warning("already patched  %s" % filename)
+          self.already_patched = True
         else:
           warning("source file is different - %s" % filename)
           errors += 1
@@ -1175,9 +1176,9 @@ def main():
 
   #pprint(patch)
   if options.revert:
-    patch.revert(options.strip, root=options.directory) or sys.exit(-1)
+    patch.revert(options.strip, root=options.directory.encode()) or sys.exit(-1)
   else:
-    patch.apply(options.strip, root=options.directory) or sys.exit(-1)
+    patch.apply(options.strip, root=options.directory.encode()) or sys.exit(-1)
 
   # todo: document and test line ends handling logic - patch.py detects proper line-endings
   #       for inserted hunks and issues a warning if patched file has incosistent line ends