2510cd6a5c
It turns out the pg_format thing is just too slow for my use-cases most of the time, even when pooling the mf. Most queries stay 90%+ in the perl script, even though they are very fast to execute on their own, screwing up the traces a lot. So instead I replace the `postgres-simple` quasi-quoter that strips whitespace (and tends to screw up queries anyway) with a simple one that just removes the outer indentation up to the first line. Why did I spend so much time on pg_format haha Change-Id: I911cd869deec68aa5cf430ff4d111b0662ec6d28 Reviewed-on: https://cl.tvl.fyi/c/depot/+/12138 Tested-by: BuildkiteCI Reviewed-by: Profpatsch <mail@profpatsch.de> |
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| .. | ||
| src | ||
| default.nix | ||
| my-prelude.cabal | ||
| 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.