Objects loaded from file cannot be indexed into later

[vyasr]

When using the (experimental) load_from_file feature, it seems like the object data must be accessed immediately. The data cannot be stored into a context. I doubt that the issue is in load_from_file, it seems more likely to be a limitation of the Jinja subscripting support, but I wasn't sure of the best way to create an object inline that would represent this issue so it is likely that there is a simpler MWE available.

The problem can be demonstrated by copying these two files into a directory:

# pyproject.toml
[build-system]
build-backend = "setuptools.build_meta"
requires = [
    "setuptools",
]

[project]
name = "test"
version = "0.1.0"

# recipe.yaml
context:
  pyproject_data: ${{ load_from_file("pyproject.toml") }}
  # Uncomment these to test the different options below
  #name: ${{ pyproject_data.project.name }}
  #version: ${{ pyproject_data.project.version }}

package:
  # Does not work
  #name: ${{ pyproject_data.project.name }}
  #version: ${{ pyproject_data.project.version }}
  # Also does not work (assumes that the above
  #name: ${{ name }}
  #version: ${{ version }}
  # This works
  name: ${{ load_from_file("pyproject.toml").project.name }}
  version: ${{ load_from_file("pyproject.toml").project.version }}

source:
  path: .

build:
  number: 0
  script: |
    echo "The name is ${{ name }}"
    echo "The data is ${{ version }}"

[wolfv]

Hey @vyasr - it's not actually an issue with Jinja in this case, but how we are doing things in the context (where we are forcing things to be either string, integer or boolean).

There is a PR to support lists in #1402. We could similarly support maps in the context. I am just wondering wether it's a good idea...

[vyasr]

Ah OK so basically this is the same issue as https://github.com/prefix-dev/rattler-build/issues/971 and https://github.com/prefix-dev/rattler-build/issues/1289.

[jakirkham]

Except we are asking for dictionaries/maps in addition to lists

Otherwise yes similar