allow unknown targets

Allow unknown targets by always converting them to JSON and formatting
them with a common context.

Signed-off-by: Simon de Vlieger <[email protected]>

Author: supakeen

src/otk/command.py

@@ -12,6 +12,7 @@
 from .context import registry as context_registry
 from .document import Omnifest
 from .help.log import JSONSequenceHandler
+from .target import CommonTarget
 from .target import registry as target_registry
 from .transform import resolve
 
@@ -151,8 +152,8 @@ def compile(
 
     kind = name.split(".")[0]
 
-    context = context_registry[kind](ctx)
-    target = target_registry[kind]()
+    context = context_registry.get(kind, CommonContext)(ctx)
+    target = target_registry.get(kind, CommonTarget)()
 
     # This time we resolve with a kind
     tree = resolve(context, tree)

src/otk/target.py

@@ -3,7 +3,7 @@
 from abc import ABC, abstractmethod
 from typing import Any
 
-from .context import Context, OSBuildContext
+from .context import Context, CommonContext, OSBuildContext
 
 
 log = logging.getLogger(__name__)
@@ -17,6 +17,16 @@ def is_valid(self, tree: Any) -> bool: ...
     def as_string(self, context: Context, tree: Any, pretty: bool) -> str: ...
 
 
+# NOTE this common target is a bit weird, we probably shouldn't always assume JSON but
+# NOTE it makes development a tad easier until we figure out all our targets
+class CommonTarget(Target):
+    def is_valid(self, tree: Any) -> bool:
+        return True
+
+    def as_string(self, context: CommonContext, tree: Any, pretty: bool = True) -> str:
+        return json.dumps(tree, indent=2 if pretty else None)
+
+
 class OSBuildTarget(Target):
     def is_valid(self, tree: Any) -> bool:
         return True