ocaml / ocaml/dune

Add support for `staged_pps` in `dune describe pp`

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describe enhancement preprocessing
Dominant language
OCaml
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Description

#7167 just adds an error message, but still dune describe pp doesn't work for staged pps so this bug has not been fixed.

Originally posted by @ejgallego in https://github.com/ocaml/dune/issues/6945#issuecomment-1699959125

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the implementation of the dune describe pp command and how it handles staged pps. Confirm the current failure, then make the command support staged pps and verify that it no longer reports only the error described in this issue.

Written by the indexing model from the issue text.

Assessment

Tech stack
ocaml
Domain
build-system, cli
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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