Yesod-perf-test

The purpose of this repository is to experiment with improving the development experience in Yesod— primarily, speeding up incremental compilation for frontend changes —starting from the stock scaffolding generated with stack new yesod-perf-test yesodweb/postgres.

The README from that scaffolding is below.

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Database Setup

After installing Postgres, run:

createuser yesod-perf-test --pwprompt --superuser
# Enter password yesod-perf-test when prompted
createdb yesod-perf-test
createdb yesod-perf-test_test

Haskell Setup

1. If you haven't already, install Stack
   • On POSIX systems, this is usually curl -sSL https://get.haskellstack.org/ | sh
2. Install the yesod command line tool: stack install yesod-bin --install-ghc
3. Build libraries: stack build

If you have trouble, refer to the Yesod Quickstart guide for additional detail.

Development

Start a development server with:

stack exec -- yesod devel

As your code changes, your site will be automatically recompiled and redeployed to localhost.

Tests

stack test --flag yesod-perf-test:library-only --flag yesod-perf-test: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 browser
  • stack 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.