Better error messages

Author: virtuald

src/semiwrap/autowrap/context.py

@@ -12,6 +12,7 @@
 
 from dataclasses import dataclass, field
 import enum
+import pathlib
 import typing
 
 from cxxheaderparser.types import Function, PQName
@@ -517,6 +518,9 @@ class HeaderContext:
     # Name in toml
     hname: str
 
+    # config file for this
+    orig_yaml: pathlib.Path
+
     extra_includes_first: typing.List[str]
     extra_includes: typing.List[str]
     inline_code: typing.Optional[str]
@@ -538,6 +542,9 @@ class HeaderContext:
     # same as classes, but only those that have trampolines
     classes_with_trampolines: typing.List[ClassContext] = field(default_factory=list)
 
+    # for diagnostic purposes
+    ignored_classes: typing.List[str] = field(default_factory=list)
+
     functions: typing.List[FunctionContext] = field(default_factory=list)
 
     # trampolines

src/semiwrap/autowrap/cxxparser.py

@@ -596,6 +596,7 @@ def on_class_start(self, state: AWClassBlockState) -> typing.Optional[bool]:
 
         # Ignore explicitly ignored classes (including default-ignore)
         if class_data.ignore:
+            self.hctx.ignored_classes.append(cls_key)
             return False
 
         if missing and not self.report_only:
@@ -1999,6 +2000,7 @@ def parse_header(
     # Initialize the header context with user configuration
     hctx = HeaderContext(
         hname=name,
+        orig_yaml=gendata.data_fname,
         extra_includes_first=user_cfg.extra_includes_first,
         extra_includes=user_cfg.extra_includes,
         inline_code=user_cfg.inline_code,

src/semiwrap/cmd_dat2tmplcpp.py

@@ -21,7 +21,7 @@ def _write_wrapper_cpp(input_dat: pathlib.Path, py_name: str, output_cpp: pathli
         if tmpl.py_name == py_name:
             break
     else:
-        raise ValueError(f"internal error: cannot find {py_name}")
+        raise ValueError(f"internal error: cannot find {py_name} in {hctx.orig_yaml}")
 
     content = render_template_inst_cpp(hctx, tmpl)
     output_cpp.write_text(content)

src/semiwrap/cmd_dat2trampoline.py

@@ -34,8 +34,18 @@ def _write_wrapper_cpp(input_dat: pathlib.Path, yml_id: str, output_hpp: pathlib
         if cls.yml_id == yml_id:
             break
     else:
-        avail = ", ".join(avail)
-        raise ValueError(f"internal error: cannot find {yml_id} (found {avail})")
+        msg = [
+            f"cannot find {yml_id} in {hctx.rel_fname}",
+            f"- config: {hctx.orig_yaml}",
+        ]
+
+        if avail:
+            msg.append("- found " + ", ".join(avail))
+
+        if hctx.ignored_classes:
+            msg.append("- ignored " + ", ".join(hctx.ignored_classes))
+
+        raise ValueError("\n".join(msg))
 
     content = render_cls_rpy_include_hpp(hctx, cls)
     output_hpp.write_text(content)