flatmap.io
The right place to find right IT company.
Prerequisites
You need to install the following software:
Haskell Setup
- If you haven't already, install Stack
- On POSIX systems, this is usually
curl -sSL https://get.haskellstack.org/ | sh
- On POSIX systems, this is usually
- Install the
yesod
command line tool:stack install yesod-bin --install-ghc
- Build libraries:
stack build
If you have trouble, refer to the Yesod Quickstart guide for additional detail.
Hlint
stack install hlint
Hindent
stack install hindent
How to run
Expose MongoDB on localhost with default port 27017
Start a development server with:
stack exec -- yesod devel
As your code changes, your site will be automatically recompiled and redeployed to http://localhost:3000.
Tests
stack test --flag h-map:library-only --flag h-map:dev
(Because yesod devel
passes the library-only
and dev
flags, matching those flags means you don't need to recompile between tests and development, and it disables optimization to speed up your test compile times).
Documentation
- Read the Yesod Book online for free
- Check Stackage for documentation on the packages in your LTS Haskell version, or search it using Hoogle. Tip: Your LTS version is in your
stack.yaml
file. - For local documentation, use:
stack haddock --open
to generate Haddock documentation for your dependencies, and open that documentation in a browserstack hoogle <function, module or type signature>
to generate a Hoogle database and search for your query
- The Yesod cookbook has sample code for various needs
Getting Help
- Ask questions on Stack Overflow, using the Yesod or Haskell tags
- Ask the Yesod Google Group
- There are several chatrooms you can ask for help:
- For IRC, try Freenode#yesod and Freenode#haskell
- Functional Programming Slack, in the #haskell, #haskell-beginners, or #yesod channels.