Though there are diverse tools for Haskell development many are not widely advertised; here I collect those I use.

Development Tools

GHC

GHC is the Haskell compiler that I use. It has various profiling options.

I use :ctags in GHCi to generate tagfiles for Vim.

You can get a stack trace on your Haskell programs by passing -xc as an rts option, viz.

./my-binary +RTS -xc

Note that my-binary must be a compiled for profiling (see below)

cabal-install

cabal-install is the build tool I use.

Generate a profiling build with

cabal build -p --enable-profiling

and generate a static executable with

cabal --enable-executable-static

You can verify that none of your dependency bounds are out-of-date with

cabal outdated

cabal can be used as a script interpreter (see here), and it supports project dependencies on a source control repository (example).

To build with coverage:

cabal build --enable-coverage

Try running

cabal test --enable-coverage

This will generate a coverage report, pointing out which functions and conditions are not vetted by your test suite.

hp2pretty

This converts a heap profile (.hp) to a graph written as an SVG file. The graphs are legible, unlike those written by hp2ps.

Hackage

pointfree

pointfree is a command-line tool that can give hints on how to write various things in pointfree style.

doctest

I use doctest occasionally. It ensures documentation examples are correct and up-to-date.

Hackage

hlint

hlint is a linter for Haskell. It supports custom hints via a configuration file.

hoogle

Hoogle is a search engine that can work on type signatures. The web frontend is here.

There is a command-line version available from Hackage

stylish-haskell is a code formatter for Haskell.

Hackage

apply-refact

I have apply-refact installed because hlint uses it to automatically refactor.

Hackage

Hackage

weeder

Hackage

ThreadScope is a tool to debug performance of parallel programs.

More on the Haskell wiki.

Hackage

Haddock is the documentation generator for Haskell. It is distributed with GHC. Run it with

cabal haddock

Preprocessors

c2hs

This is a tool to safely generate Haskell bindings to C code. It can read C header files and generate foreign import … declarations.

Example here.

See Edward Yang's blog posts and the wiki for more detail.

Happy

Happy is a parser generator for Haskell; it integrates with Alex. In my experience it is far better than using a parser combinator library for parsing programming languages; it is also more performant.

Pay special attention to parametric productions, which provide some of the ease of parser combinators.

Hackage

Alex

Alex is a lexer generator for Haskell. It generates faster lexers than parser combinator libraries.

Hackage

Vim Plugins

c2hs-vim

Syntax highlighting extensions for vim that makes .chs files look sensible.

github

ghci-syntax

Syntax highlighting and detection of .ghci files.

github

github

github

github

hs-conceal

Display forall as ∀ (for instance) when not editing that particular line.

github

syntastic

Integrates with hlint.

github

vim-hoogle

Hoogle integration for Vim.

github

hspec-vim

Syntax highlighting for hspec.

github

pointfree-vim

A Vim plugin for pointfree.

github