Dependent compilation failed when building with stack - Githubissues

faylang / fay

A proper subset of Haskell that compiles to JavaScript

https://github.com/faylang/fay/wiki

BSD 3-Clause "New" or "Revised" License

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Dependent compilation failed when building with stack #457

Closed swamp-agr closed 5 years ago

swamp-agr commented 5 years ago

Problem statement

stack used in project.
Project triggered Fay programmatically.
I want to add new fay package in dependency list.
During compilation stack used its own ghc and ghc-pkg.
stack rewrites HASKELL_SANDBOX_CONFIG, GHC_PACKAGE_PATH environment variables.
fay cannot find new package.

Impact analysis

Since project compilation constantly failed I am loosing ability to ship new versions into production.
This is not a blocker since I can reimplement package functionality in my project.

Solution Proposal

Proposed simple analysis for ghc and ghc-pkg from ghc-paths:
If their paths contained ".stack" inside then:
- stack exec -- ghc # for ghc
- stack exec -- ghc-pkg # for ghc-pkg
otherwise fallback to previous execution flow.