I made a mistake merge. Reverting it in c778945806 undid the state
on master, but now I realize it crippled the git merge mechanism.
As the merge contained a mix of commits from `master..staging-next`
and other commits from `staging-next..staging`, it got the
`staging-next` branch into a state that was difficult to recover.
I reconstructed the "desired" state of staging-next tree by:
- checking out the last commit of the problematic range: 4effe769e2
- `git rebase -i --preserve-merges a8a018ddc0` - dropping the mistaken
merge commit and its revert from that range (while keeping
reapplication from 4effe769e2)
- merging the last unaffected staging-next commit (803ca85c20)
- fortunately no other commits have been pushed to staging-next yet
- applying a diff on staging-next to get it into that state
Switch to the approach taken by
https://github.com/justinwoo/easy-purescript-nix/blob/master/psc-package-simple.nix
This downloads a prebuilt release and patches the linker paths. It
reduces the number of supported platforms, but ensures we're using the
official supported psc-package compiler. The `haskellPackages` approach
wasn't supported and was leading to version conflicts with dependencies.
For the past couple of years, there has continued to be problems with having the PureScript compiler on nixpkgs building from Haskell packages it is not built against in its actual development and release. We have seen this issue come up multiple times here on nixpkgs, but this also causes numerous issues to be filed against the PureScript compiler repository. One example of an exchange that has occurred multiple times in the past: https://github.com/NixOS/nixpkgs/issues/53597https://github.com/purescript/purescript/issues/3571. As noted, the PureScript compiler is not on Stackage because it is not meant to be used as a library, and it does not update itself to the latest LTS and cut releases to match LTS releases.
Instead, I have begun maintaining my own derivation for the PureScript compiler (among other tools) in a small project here: https://github.com/justinwoo/easy-purescript-nix. Within are other reference and derivations for other tools commonly used in the PureScript ecosystem, updated to their respective newest releases. These derivations use the same releases that other Linux and OSX users use, along with the standard application of patchELF to provide for runtime dependencies such as zlib, gmp, and ncurses5. These derivations are now used by a variety of NixOS, non-NixOS Linux, and OSX users.
This commit then consumes the easy-purescript-nix derivation for the PureScript compiler and provides it in all-packages for consumption.
Updates that remove features and improve user experience.
Adds warnings for trying to install packages without (purescript/psc-package#126 by @Dretch)
Filters "installing" messages for build (purescript/psc-package#130 by @Dretch)
Adds options for limiting jobs for install (purescript/psc-package#127 by @vladciobanu)
Per purescript/psc-package#121, removes the confusing misfeature "add-from-bower", which led to many users thinking this command was for adding "extra-deps" like Stack. See the thread for details on how you could readily replace this command if you used it before.
