Draft
Conversation
added 16 commits
May 29, 2024 09:04
Open
12 tasks
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This adds a
--granular-outputflag that allows to split a package into multiple derivations (where executable/test/benchmark targets depend on the libraries). The behaviour without the flag is unchanged.See also: NixOS/nixpkgs#315129
Example output:
I've hit a dead end with this, which is why I'm opening this as a draft PR to find out if it's worth pursuing this idea further:
Even if an executable derivation has the library/libraries in its
*HaskellDepends, cabal will prioritise building the library from source, essentially rendering this feature useless.I've tried getting this to work with incremental builds (setting
doInstallIntermediatesandenableSeparateIntermediatesOutputin the libraries and passing them to the exes viapreviousIntermediates), but this doesn't seem to help.Maybe someone here has an idea how to solve that problem?
Important
In the current state, the *Exes targets don't work if the source is hackage.