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Update the readme
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README.md
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README.md
@ -26,23 +26,25 @@ the following features in mind:
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## Building
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Ormolu builds with `cabal-install` and `ghc-8.4`. For instance:
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The easiest way to build the project is with Nix:
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```bash
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$ nix-shell -p haskell.compiler.ghc844
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<inside shell>
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$ cabal new-update
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$ cabal new-build
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```console
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$ nix-build
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```
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Or with `cabal-install` from the Nix shell:
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```console
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$ nix-shell --run "cabal new-build"
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```
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Alternatively, `stack` could be used with a `stack.yaml` file as follows.
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```bash
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```console
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$ cat stack.yaml
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resolver: lts-12.26
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resolver: lts-13.19
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packages:
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- '.'
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extra-deps:
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- path-io-1.4.2
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$ stack build
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```
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@ -50,18 +52,21 @@ $ stack build
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## Usage
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The following will print the formatted output to the standard output.
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```bash
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```console
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$ ormolu Module.hs
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```
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Add `--mode inplace` to replace the contents of the input file with the
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formatted output.
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```bash
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```console
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$ ormolu --mode inplace Module.hs
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```
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A configuration file can specify the language extensions to use by default.
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```bash
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```console
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$ cat ormolu.yaml
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ghc-opts:
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- -XLambdaCase
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@ -82,10 +87,10 @@ welcome.
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Right now there are two options for people who want to contribute:
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* Implementing rendering of AST. This is the main focus right now because we
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want to have a MVP which can render all syntactical constructions found in
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Haskell source code. Once that is achieved we'll polish the tool
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iteratively.
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* [Implementing rendering of AST][cover-ast]. This is the main focus right
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now because we want to have a MVP which can render all syntactical
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constructions found in Haskell source code. Once that is achieved we'll
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polish the tool iteratively.
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* [Fixing bugs][bugs]. If this seems more interesting than implementing
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rendering of AST, you are welcome to do this as well.
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@ -138,4 +143,5 @@ Copyright © 2018–2019 Tweag I/O
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[haskell-src-exts]: https://hackage.haskell.org/package/haskell-src-exts
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[hindent]: https://hackage.haskell.org/package/hindent
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[cover-ast]: https://github.com/tweag/ormolu/issues?q=is%3Aissue+is%3Aopen+label%3Acovering-ghc-ast
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[bugs]: https://github.com/tweag/ormolu/issues?q=is%3Aissue+is%3Aopen+label%3Abug
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