Description
Describe the bug
I am attempting to produce a Nix flake of the Plutus Pioneer Program so that I could use nix develop instead of Docker (I got some network problem which caused the Docker image to fail at a cloning step repeatedly).
- I used this flake template for Haskell projects here
I followed this guide to integrate with the existing cabal.project file and eliminated the sha256 reference problem with the dependencies.
However, the next problem is that Nix failed to evaluate call-cabal-project-to-nix because the attribute sourceRepo is missing from x, which I assume is the variable for the source object.
This is a deeply nested function call, so it isn't immediately clear to me how to I can pass the correct attribute to it. Furthermore, the fetching functions seem to be dependent on the remote resources, which appears to be missing the mentioned attribute.
$ nix develop --show-trace
warning: Git tree '/path/to/ppp' is dirty
error:
$ nix develop
warning: Git tree '/path/to/ppp' is dirty
error:
… while calling the 'head' builtin
at /nix/store/g2ysyzdx76m4z7lnmyddcwdz25lx7kn1-source/lib/attrsets.nix:1575:11:
1574| || pred here (elemAt values 1) (head values) then
1575| head values
| ^
1576| else
… in the left operand of the update (//) operator
at /nix/store/mv77dn0m12d9s74bkrzfl4x5q5im09f2-source/src/core/mkHaskellProject.nix:175:35:
174|
175| packages = project.packages // extra-packages;
| ^
176|
(stack trace truncated; use '--show-trace' to show the full, detailed trace)
error: attribute 'sourceRepo' missing
at /nix/store/b0mfwir5lq04p8cpcrajidknn3gh4bbq-source/lib/call-cabal-project-to-nix.nix:261:82:
260| # as built by a darwin builder, and fetch it from a cache
261| sourceReposEval = builtins.map (x: (fetchPackageRepo evalPackages.fetchgit x.sourceRepo)) sourceRepoPackageResult.sourceRepos;
| ^
262| sourceReposBuild = builtins.map (x: (fetchPackageRepo pkgs.fetchgit x.sourceRepo).fetched) sourceRepoPackageResult.sourceRepos;System information:
x86_64-linux- GHC 8.10.7 (template default)
- Haskell.nix version (template default)
Steps To Reproduce
- clone the PPP repo:
git clone --depth 1 http://github.com/nkarl/plutus-pioneer-program.git- Init flake
cd code && nix flake init --template github:input-output-hk/iogx#haskell --impure- Set the SHA256 hashes for dependencies in
cabal.project.
source-repository-package
--sha256: 0i40hp1mdbljjcj4pn3n6zahblkb2jmpm8l4wnb36bya1pzf66fx
-- Direct dependency.
source-repository-package
--sha256: 10pb0yfp80jhb9ryn65a4rha2lxzsn2vlhcc6xphrrkf4x5lhzqc
-- Direct dependency.
source-repository-package
--sha256: 0da1vn2l6iyfxcjk58qal1l4755v92zi6yppmjmqvxf1gacyf9px
-- Direct dependency.
source-repository-package
--sha256: 1b9ppgavqad78a2z1zxv7v4jasjz6zz0mxkr0zx0bbcd0i00jajf
-- Should follow cardano-wallet.
source-repository-package
--sha256: 129r5kyiw10n2021bkdvnr270aiiwyq58h472d151ph0r7wpslgp
-- This is needed because we rely on an unreleased feature
-- https://github.com/input-output-hk/cardano-ledger/pull/3111
source-repository-package
--sha256: 1jg1h05gcms119mw7fz798xpj3hr5h426ga934vixmgf88m1jmfxAdditional Context
I am still new to Nix so I am not sure how to resolve this problem.