environ not available in context

[mariusvniekerk]

When trying to use boa with a recipe like

context:
   version: "{{ environ.get('VERSION', '3.1.4') }}"

boa build fails with

Traceback (most recent call last):
  File "/home/mvanniekerk/miniconda3/bin/boa", line 10, in <module>
    sys.exit(main())
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/boa/cli/boa.py", line 131, in main
    run_build(args)
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/boa/core/run_build.py", line 455, in run_build
    all_recipes = find_all_recipes(args.target, config)  # [noqa]
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/boa/core/run_build.py", line 50, in find_all_recipes
    yml = render(fn, config=config)
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/boa/core/render.py", line 182, in render
    context_dict[key] = tmpl.render(context_dict)
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/jinja2/environment.py", line 1090, in render
    self.environment.handle_exception()
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/jinja2/environment.py", line 832, in handle_exception
    reraise(*rewrite_traceback_stack(source=source))
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/jinja2/_compat.py", line 28, in reraise
    raise value.with_traceback(tb)
  File "<template>", line 1, in top-level template code
  File "/home/mvanniekerk/miniconda3/lib/python3.8/site-packages/jinja2/environment.py", line 471, in getattr
    return getattr(obj, attribute)
jinja2.exceptions.UndefinedError: 'environ' is undefined

[dhirschfeld]

I'm looking at ways to inject context variables (esp. the version) into my boa recipes and this would be very handy.

I'm currently doing a jinja2 pre-render to inject the context but it would be nice if I didn't have to and this seems like an easy solution

[mariusvniekerk]

I'm not quite doing a jinja2 pre-render but i load the recipe.yaml with ruamel.yaml and setdefault into the context key

[dhirschfeld]

Maybe a CLI option would be a good alternative?

boa build --context "version=${VERSION}" .