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sterni 73b1f0407b chore(3p/sources): bump channels & overlays – xz edition 
Update all 3p/sources as we do normally except

- agenix which is still pinned to 0.15.0

- nixpkgs (unstable) which we bump to the HEAD of the staging-next
  branch. This branch includes the downgrade of xz from 5.6.1 to
  5.4.6 (https://github.com/nixos/nixpkgs/commit/d6dc19adbd). It
  also includes the second haskell-updates rotation with GHC 9.6.4
  which contains a few build fixes that seem to be required to get
  our Haskell targets to work.

Note that this only reverts xz to a version that doesn't contain the now
known backdoor (CVE-2024-3094) which may or may not actually affect
NixOS. Additionally reverting to a version before the malicious
contributor's involvement may be difficult, but prudent:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068024

Changes required by the updates:

- //3p/overlays/haskell:

  - Update ihp-hsx to latest master to fix build with Stackage LTS 22.
  - Update tmp-postgres to latest master to work around failure with
    ansi-wl-pprint >= 1.
  - Patch punycode for mtl >= 2.3.

- //users/Profpatsch:

  - Clean up some warnings, mostly about unused dependencies
  - my-prelude: Fix build with ghc-boot-9.6.4
  - cas-serve: Use crypton over unmaintained cryptonite
  - ical-smolify: skip in ci, iCalendar would require heavy patching to
    work with Stackage LTS 22.

- //users/{wpcarro,aspen,flokli}:

  Disable home-manager / nixos configuration builds that seem to have
  transient failures that should disappear as we move away from
  staging-next and closer to an actual channel release.

Change-Id: I5cca48e101041c3aedc1d9932dbca2cac885fcc1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11289
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
2024-03-31 22:27:04 +00:00
..
src chore(3p/sources): bump channels & overlays – xz edition 2024-03-31 22:27:04 +00:00
default.nix feat(users/Profpatsch/MyPrelude): add Pretty module 2024-03-23 19:51:59 +00:00
my-prelude.cabal feat(users/Profpatsch/MyPrelude): add Pretty module 2024-03-23 19:51:59 +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.