chris-martin

{ coreutils, writeShellScript, lib, system, glibcLocales }:

rec {

    inherit (builtins) derivation;
    inherit (lib) concatMapStringsSep;

    standardBuildInputs = [ coreutils ];

    locale = { LC_ALL = "en_US.UTF-8"; LOCALE_ARCHIVE = "${glibcLocales}/lib/locale/locale-archive"; };

chris-martin

import Control.Exception.Safe
import Control.Concurrent

bracketFork
    :: IO resource
        -- ^ The first action; will run in the current thread
    -> (resource -> IO a)
        -- ^ A final action that runs in the forked thread, with async exceptions masked
    -> (resource -> IO b)
        -- ^ Action that runs in the forked thread, with async exceptions unmasked

chris-martin

#! /usr/bin/env bash

set -eufo pipefail

nix-shell --pure --run 'ghcide --lsp'

chris-martin

{
    pkgs =
        import (import ./nixpkgs.nix) {};

    texlive =
        import ./texlive.nix { inherit (pkgs) texlive; };

    fontsForLatex =
        [
            { name = "google-fonts";

chris-martin

https://twitter.com/Cshearer41/status/1103717536921800704

Let a, b, c be the triangles, smallest to largest.

Observations from the illustration about the relative triangle sizes:
  
    side b = 2 * height a                   [observation ab]
    side c = 2 * height b                   [observation bc]

Let w be the rectangle's width and let h be its height.

chris-martin

{-# LANGUAGE LambdaCase #-}

import Prelude (Bool (True, False), Monad, (>>=))

ifThenElseM :: Monad m => m Bool -> m a -> m a -> m a
ifThenElseM cond ifTrue ifFalse =

    cond >>= \case { True -> ifTrue; False -> ifFalse }

ifThenElseM' :: Monad m => [(m Bool, m a)] -> m a -> m a

chris-martin

import           Pipes                                   
import           Pipes.HTTP                              
import qualified Pipes.Prelude    as P                   
import qualified Pipes.ByteString as PB                  
import qualified Data.ByteString  as BS                  
                                                         
url = "https://typeclasses.com"                          
                                                         
fetch url action =                                       
  do                                                     

chris-martin

{ pkgs, ... }:
let
  src = pkgs.fetchFromGitHub {
    owner = "cachix";
    repo = "cachix";

    # Jun 23, 2018
    rev = "6a65632a4b51488b5355377e5c292a6a01efee2e";
    sha256 = "13l12xkqpx6l7pfqwysz6yrgpjk6ydj6w7c85h74mzz4fvzihxyl";
  };

chris-martin

The problem:

chris@cubby ~ ❯❯❯ nix run -f '<nixpkgs>' zlib -c cabal install zlib
Resolving dependencies...
Configuring zlib-0.6.2...
Failed to install zlib-0.6.2
Build log ( /home/chris/.cabal/logs/ghc-8.2.2/zlib-0.6.2-L2Qec9Buml21zwTs2VzSGb.log ):
cabal: Entering directory '/tmp/cabal-tmp-31070/zlib-0.6.2'
Configuring zlib-0.6.2...

chris-martin

#! /usr/bin/env bash

set -e  # Exit immediately if a command exits with a non-zero status.
set -u  # Treat unset variables as an error when substituting

# The .nix directory is where we put all our Nix output symlinks. Create it if it doesn't already exist.
mkdir --parents .nix

# Pin Nix to the exact version of nixpkgs we're using.
nix build -f nixpkgs.nix --out-link .nix/nixpkgs