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Questions tagged [haskell-stack]

Questions about the Stack, a build tool for the Haskell language. Do not use this tag for general Haskell questions that do not involve Stack.

stack is a modern, cross-platform build tool for Haskell code. It covers management of Haskell environment and project dependencies, building, testing and benchmarking.

1268 questions
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How can I generate a coverage overlay with HPC and Stack?

I have a small/medium sized Haskell codebase for which I'd like to generate a coverage report. By default the coverage report that HPC provides is filled with false negatives (e.g. I use lenses to access most of my record fields, rather than the…
James
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Sharing ~/.stack with docker

Our team is using Docker for building our Haskell app in it, and in order to optimize build times, we work towards sharing the ~/.stack directory from OS with the one inside docker containers. Initial implementation was to just reuse the one from…
Konstantine Rybnikov
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In emacs stack-ghci cannot load interface files but `stack build` from the command line does

I can stack build a project from the command line but when I try C-c C-l in emacs (with (custom-set-variables '(haskell-process-type 'stack-ghci))) I get an error that all the package modules I import can't be…
vivian
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Haskell stack cant find installed ghc

A project that already has been set up is unable to find the GHC. Stack build results in: No compiler found, expected minor version match with ghc-8.0.2 (x86_64-ncurses6-nopie) (based on resolver setting in /home/iam/Work/has/grove/stack.yaml). To…
pricks
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stack is not working after upgrading platform to 8.0.2 from 8.0.1

After upgrading haskell platform package, stack command does not work. $ stack path No compiler found, expected minor version match with ghc-8.0.1 (x86_64) (based on resolver setting in /home/eii/exercism/haskell/linked-list/stack.yaml). To install…
Jihyun
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How to use a custom haddock executable to generate documentation with stack?

I'm working on a new theme for Haddock and want to try it on some real projects. How can I configure stack to use my haddock executable? I don't see any config option in stack.yaml. I've also tried putting the new haddock executable into my PATH but…
wereHamster
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avoiding recompilation when types don't change

I have a large Haskell project with many packages built with stack. I have long recompilation times when I make trivial changes in a core model or some configuration data without changing any types. If this were C, I would have to only recompile the…
ghorn
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How can I create static executables on OS X with Stack?

I would like to create a static executable for Darwin for a small utility I wrote called difftodo. difftodo depends indirectly on pcre, and I would like people to be able to download a binary and run it without having to brew install pcre first. If…
jml
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How to remove old build plans installed by Haskell stack?

How can I remove old build plans (GHC compiler and packages) installed by the stack tool?
Kwang Yul Seo
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Haskell: Debugging Long Compilation Times on Stack Projects

I'm currently using Stack to build a project, which totals about 80 modules and 13,000 lines of code. Currently, compilation takes about 3 minutes for a minor change in my types files, which is unacceptable -- it prevents me from rapidly testing my…
Timothy Chu
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Manage hoogle index using stack tool

Context: Before stack I stopped using hoogle locally because my index would somehow lose sync with installed packages. If I recall correctly, I had issues with different results in ghci, command line and cabal sandboxes. Can I leverage stack…
sevo
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List available stack build plans

How can I get the list of available build plans for stack? On some system I get lts-3.7 and some other I have lts-3.1.
Geekingfrog
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Haskell stack not building test executable

Background I'm building a logfile parser in Haskell. I'm using stack to build it. Running the stack build command works happily and my project compiles. Running stack test, however, produces the following error: parser-test: executable not found I…
Garry Cairns
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Building multiple executables in the default Haskell Stack project

I used the default stack new to setup a project that has a server and a client as separate executables. I altered the package.yaml file in what seems like the right way (As of April 21, 2020 "There is no user guide") and added a new file to my app…
John F. Miller
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Install a Haskell package directly from a git repository?

stack allows one to define git repositories as packages using the stack.yaml file. Is it possible to do something like the following, directly via command-line: stack install --resolver=lts-12.1 git@github.com:saurabhnanda/some-repo.git Use-case:…
Saurabh Nanda
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