maurice/snix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
snix/users/Profpatsch/my-prelude
History
Profpatsch 444b67b010 feat(users/Profpatsch/my-prelude): add builder & divisible helpers 
I’ve had enough of `show & stringToText` bullshit, let’s finally
create a trivial builder contravariant module that wraps
`Text.Builder` and `ByteString.Builder` and has a naming scheme that
does not collide with anything and that I can remember in my sleep.

Plus some experiments in making `Divisible` useful with `HasField`.

Change-Id: Ie25f78226d24eadf4c35353fe9db40b7683d82c3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12955
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
2025-01-05 21:00:11 +00:00
..
src feat(users/Profpatsch/my-prelude): add builder & divisible helpers 2025-01-05 21:00:11 +00:00
default.nix feat(users/Profpatsch/my-prelude): add builder & divisible helpers 2025-01-05 21:00:11 +00:00
my-prelude.cabal feat(users/Profpatsch/my-prelude): add builder & divisible helpers 2025-01-05 21:00:11 +00:00
README.md feat(users/Profpatsch/my-prelude): add RunCommand.hs 2023-04-22 17:17:03 +00:00

README.md

My Haskell Prelude

Contains various modules I’ve found useful when writing Haskell.

Contents

A short overview:

MyPrelude.hs

A collection of re-exports and extra functions. This does not replace the Prelude module from base, but rather should be imported in addition to Prelude.

Stuff like bad functions from prelude (partial stuff, or plain horrible stuff) are handled by a custom .hlint file, which you can find in ../.hlint.yaml.

The common style of haskell they try to enable is what I call “left-to-right Haskell”, where one mostly prefers forward-chaining operators like &/<&>/>>= to backwards operators like $/<$>/<=<. In addition, all transformation function should follow the scheme of aToB instead of B.fromA, e.g. Text.unpack/Text.pack -> textToString/stringToText. Includes a bunch of text conversion functions one needs all the time, in the same style.

These have been battle-tested in a production codebase of ~30k lines of Haskell.

Label.hs

A very useful collection of anonymous labbeled tuples and enums of size 2 and 3. Assumes GHC >9.2 for RecordDotSyntax support.

Pretty.hs

Colorful multiline pretty-printing of Haskell values.

Test.hs

A wrapper around hspec which produces colorful test diffs.

Aeson.hs

Helpers around Json parsing.

Data.Error.Tree

Collect errors (from Data.Error) into a tree, then display them in a nested fashion. Super useful for e.g. collecting and displaying nested parsing errors.

RunCommand.hs

A module wrapping the process API with some helpful defaults for executing commands and printing what is executed to stderr.