Using plutus-apps as a dependency in another Haskell project

[Dr Xano]

I wanted to build the PAB of Plutus and im using the Plutus-starter repository to build the PAB. But when the build finished i noticed it built an old version of Plutus-apps. I tried to update the dependencies of the project, and replaced the tag of the plutus-apps dependency to get a recent commit. But when i start nix-shell im always getting this:

error: attribute '4c60896dff0c31a98395ba6e6791433cd61a25e3' missing

       at /nix/store/bvynxhgsxhp6ds11ak1wnjx5h8avmfwf-source/modules/cabal-project.nix:111:37:

          110|       default = if config.sha256map != null
          111|         then { location, tag, ...}: config.sha256map.${location}.${tag}
             |                                     ^
          112|         else _: null;
(use '--show-trace' to show detailed location information)

I tried other recent commits and tags but its only working with this tag: plutus-starter-devcontainer/v1.0.14

[ak3n]

You might also need to update the nix/pkgs/haskell/haskell.nix file:

rg plutus-starter-devcontainer/v1.0.14
cabal.project
25:  tag: plutus-starter-devcontainer/v1.0.14

nix/pkgs/haskell/haskell.nix
25:      "https://github.com/input-output-hk/plutus-apps.git"."plutus-starter-devcontainer/v1.0.14" = "0j3hphj4b21vwdj900233d67qsaj91mppwsx1vv0ichnmnw2bmir";

and update the tag there.

[Dr Xano]

Got it, and now i have a new question: Where do i find the sha256 of a commit?

[ak3n]

Usually nix-shell will message you about the hash mismatch telling both: the expected and the actual hash. Just try to change the commit, run nix-shell again and then fix the hash.

[Dr Xano]

What im doing is updating the dependencies of the plutus-starter repository. I managed to update the tags, updated the sha256 according to nix-shell, and now i am getting this error:

Error:
    Problem with module re-exports:
      - The module 'Data.Aeson.Extras'
        is not exported by any suitable package.
        It occurs in neither the 'exposed-modules' of this package,
        nor any of its 'build-depends' dependencies.
      - The module 'Data.Either.Extras'
        is not exported by any suitable package.
        It occurs in neither the 'exposed-modules' of this package,
        nor any of its 'build-depends' dependencies.
      - The module 'Plutus.V1.Ledger.Ada'
        is not exported by any suitable package.
        It occurs in neither the 'exposed-modules' of this package,
        nor any of its 'build-depends' dependencies.
      - The module 'Plutus.V1.Ledger.Slot'
        is not exported by any suitable package.
        It occurs in neither the 'exposed-modules' of this package,
        nor any of its 'build-depends' dependencies.
      - The module 'Plutus.V1.Ledger.TxId'
        is not exported by any suitable package.
        It occurs in neither the 'exposed-modules' of this package,
        nor any of its 'build-depends' dependencies.
    In the stanza 'library'
    In the package 'plutus-ledger-0.1.0.0'

[Dr Xano]

ak3n i did it. Got over this problem, managed to update the dependencies, and compiled the repository sucessfully. I also opened a PR on the repository with what i've done.

[ak3n]

@DrXano thank you! Will take a look at your PR a bit later. We might want to release PAB at first and then plutus-starter.

I'm closing this if you don't mind.