Open
Description
Actual Situation
I've made my own template. I run copier and filled the questionnaire.
This is my first experience with copier, so with high chance I as a user can make mistakes. And indeed, copier shows that I have an error in my template. However, I can't understand in which file I have an error.
Here is the output:
Copying from template version None
Traceback (most recent call last):
File "/usr/bin/copier", line 8, in <module>
sys.exit(copier_app_run())
~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/plumbum/cli/application.py", line 640, in run
inst, retcode = subapp.run(argv, exit=False)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/plumbum/cli/application.py", line 635, in run
retcode = inst.main(*tailargs)
File "/usr/lib/python3.13/site-packages/copier/cli.py", line 281, in main
return _handle_exceptions(inner)
File "/usr/lib/python3.13/site-packages/copier/cli.py", line 70, in _handle_exceptions
method()
~~~~~~^^
File "/usr/lib/python3.13/site-packages/copier/cli.py", line 272, in inner
with self._worker(
~~~~~~~~~~~~^
template_src,
^^^^^^^^^^^^^
...<3 lines>...
overwrite=self.force or self.overwrite,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
) as worker:
^
File "/usr/lib/python3.13/site-packages/copier/main.py", line 268, in __exit__
raise value
File "/usr/lib/python3.13/site-packages/copier/cli.py", line 279, in inner
worker.run_copy()
~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/copier/main.py", line 95, in _wrapper
return func(*args, **kwargs)
File "/usr/lib/python3.13/site-packages/copier/main.py", line 995, in run_copy
self._render_template()
~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/copier/main.py", line 684, in _render_template
for dst_relpath, ctx in dst_relpaths_ctxs:
^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/copier/main.py", line 898, in _render_path
yield from self._render_parts(relpath.parts, is_template=is_template)
File "/usr/lib/python3.13/site-packages/copier/main.py", line 852, in _render_parts
rendered_part = self._render_string(part, extra_context=extra_context)
File "/usr/lib/python3.13/site-packages/copier/main.py", line 913, in _render_string
return tpl.render(**self._render_context(), **(extra_context or {}))
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/jinja2/environment.py", line 1295, in render
self.environment.handle_exception()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/jinja2/environment.py", line 942, in handle_exception
raise rewrite_traceback_stack(source=source)
File "<template>", line 1, in top-level template code
jinja2.exceptions.UndefinedError: 'dataset' is undefined
I don't have a file called <template>.
Desired Situation
- Hide stack trace (maybe introduce a CLI switch for "debug-mode" if stack trace is needed).
- Show file where the error occurred.
IMHO, in general, I believe showing the internal stack trace for a consumer application is kinda strange
Proposed solution
Catch Jinja exception. I guess, I didn't look at the source code of copier, though I have experience in Python.
https://github.com/copier-org/copier/blob/master/copier/main.py#L694 -- src seems like the path to source file?