[Bug]: openapi3 multiple files output doesn't work

[artsiommiksiuk]

Describe the bug

According to this PR: 9890, multiple files should be supported.

I've updated to 1.10.0 all components, but can't make it work.

Reproduction

I've checked the tests from the PR above, and made the config follow the same pattern. This is literally a complete config I have.

emit:
  - "@typespec/openapi3"
options:
  "@typespec/openapi3":
    emitter-output-dir: "{output-dir}/v01"
    file-type:
      - "json"
      - "yaml"
    output-file: "schema.{file-type}"
    openapi-versions:
      - 3.1.0
output-dir: "{project-root}/dist"

It produces only dist/v01/schema.json,yaml file, with yaml content inside.

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[timotheeguerin]

oh weird, this somehow does work in the playground

reproing as well locally.

It does also work if you don't pass an explicit value for output-file but use the default

[timotheeguerin]

I see, this is due to the compiler automatic interpolation of options which runs before openapi3 has a chance to run its custom one. Works in the playground as it doesn't go through that config resolution.
One option would be to only interpolate this when the target value result in a string or number maybe.

[artsiommiksiuk]

Cool. Thanks for the quick response!