60 lines
2.3 KiB
Markdown
60 lines
2.3 KiB
Markdown
Learn about the Elm programming language at [elm-lang.org](http://elm-lang.org/).
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[](https://travis-ci.org/evancz/Elm)
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## Install
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**Arch Linux** — follow [these directions](https://github.com/evancz/Elm/wiki/Installing-Elm#arch-linux) and then
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jump to the [My First Project](#my-first-project) section.
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<br/>
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**OS X 10.9 or XCode 5** — follow
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[these directions](http://justtesting.org/post/64947952690/the-glasgow-haskell-compiler-ghc-on-os-x-10-9)
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before continuing with the platform agnostic directions below.
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**Platform Agnostic** —
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download the [Haskell Platform 2012.2.0.0 or later](http://hackage.haskell.org/platform/).
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Once the Haskell Platform is installed:
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cabal update
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cabal install elm
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cabal install elm-server
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## Use
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To use `elm` and `elm-server` you may need to add a new directory to your PATH.
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Cabal should tell you where your executables are located upon
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successful installation. It'll be something like `/home/evan/.cabal/bin`
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which you should append to your PATH variable.
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See this tutorial if you are new to changing your PATH in
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[Unix/Linux](http://www.cyberciti.biz/faq/unix-linux-adding-path/).
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## My First Project
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Now we will create a simple Elm project.
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The following commands will set-up a very basic project and start the Elm server.
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mkdir helloElm
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cd helloElm
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printf "import Mouse\n\nmain = lift asText Mouse.position" > Main.elm
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elm-server
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The first two commands create a new directory and navigate into it. The `printf`
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commands place a simple program into `Main.elm`. Do this manually if you do not
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have `printf`. The final command starts the Elm server at [localhost:8000](http://localhost:8000/),
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allowing you to navigate to `Main.elm` and see your first program in action.
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#### Final Notes
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The `elm` package provides
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[some utility functions](http://hackage.haskell.org/package/Elm) for
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working with Elm in Haskell. This can be useful for creating tooling
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for Elm, and has been useful for projects like
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[the website](http://elm-lang.org/) and
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[`elm-get`](https://github.com/evancz/elm-get). Email the list if you
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want to rely on these functions!
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If you are stuck, email
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[the list](https://groups.google.com/forum/?fromgroups#!forum/elm-discuss)
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or ask a question in the
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[#Elm IRC channel](http://webchat.freenode.net/?channels=elm).
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