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mirror of https://github.com/tweag/ormolu.git synced 2024-09-11 21:27:46 +03:00

Update the readme

Also adds the note to ‘DESIGN.md’ stating that it's no longer being updated.
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mrkkrp 2019-10-04 11:30:49 +02:00 committed by Mark Karpov
parent 480d6edfb3
commit 096c8d7f63
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# Ormolu
*This document represents our discussions and plans at early stages of
development, it is no longer being updated.*
* [Analysis of the existing solutions](#analysis-of-the-existing-solutions)
* [Brittany](#brittany)
* [Hindent](#hindent)

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@ -11,20 +11,19 @@ the following goals in mind:
* Using GHC's own parser to avoid parsing problems caused by
[`haskell-src-exts`][haskell-src-exts].
* Let some whitespace be programmable. The layout of the input
influence the layout choices in the output. This means that the
choices between single-line/multi-line layouts in each particular
situation are made by the user, not by an algorithm. This makes the
implementation simpler and leaves some control to the user while
still guaranteeing that the formatted code is stylistically
consistent.
* Writing code in such a way so it's easy to modify and maintain. Roughly,
it means that the project follows the path of [`hindent`][hindent] and is
very much about printing AST in a particular way.
* Let some whitespace be programmable. The layout of the input influences
the layout choices in the output. This means that the choices between
single-line/multi-line layouts in each particular situation are made by
the user, not by an algorithm. This makes the implementation simpler and
leaves some control to the user while still guaranteeing that the
formatted code is stylistically consistent.
* Writing code in such a way so it's easy to modify and maintain.
* Implementing one “true” formatting style which admits no configuration.
* That formatting style aims to result in minimal diffs while still
remaining very close to “conventional” Haskell formatting people use.
* Idempotency: formatting already formatted code doesn't change it.
* Choose a style compatible with modern dialects of Haskell. As new Haskell
extensions enter broad use, we may change the style to accomodate them.
* Idempotence: formatting already formatted code doesn't change it.
* Be well-tested and robust to the point that it can be used in large
projects without exposing unfortunate, disappointing bugs here and there.
@ -53,7 +52,7 @@ packages:
$ stack build
```
To use Ormolu directly from GitHub with nix, this snippet may come in handy:
To use Ormolu directly from GitHub with Nix, this snippet may come in handy:
```nix
# This overlay adds Ormolu straight from GitHub.
@ -96,10 +95,8 @@ $ ormolu --mode inplace Module.hs
* Does not handle CPP (wontfix, see [the design document][design]).
* Input modules should be parsable by Haddock, which is a bit stricter
criterion than just being a valid Haskell modules.
* Various minor idempotence issues, most of them are related to comments †.
† To be resolved in 0.0.2.0.
criterion than just being valid Haskell modules.
* Various minor idempotence issues, most of them are related to comments.
## Editor integration
@ -110,7 +107,7 @@ We know of the following editor integrations:
## Running on Hackage
It's possible to try Ormolu on arbitrary packages from Hackage. For that
execute (from root of cloned repo):
execute (from the root of the cloned repo):
```console
$ nix-build -A hackage.<package>
@ -133,5 +130,4 @@ Copyright © 2018present Tweag I/O
[design]: ./DESIGN.md#cpp
[haskell-src-exts]: https://hackage.haskell.org/package/haskell-src-exts
[hindent]: https://hackage.haskell.org/package/hindent
[emacs-package]: https://github.com/vyorkin/ormolu.el