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build/
node_modules/

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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PatternSynonyms #-}

import           Control.Applicative
import           Control.Lens
import           Control.Monad

import           Data.ByteString (ByteString)
import qualified Data.ByteString.Lazy as BSL
import qualified Data.IORef as IORef

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{-# LANGUAGE TemplateHaskell #-}
module Lens where

import Control.Lens
import Data.Monoid (First, (<>))

data FooBar =
     Foo (Either Int Bool)
   | Bar (Maybe Bool)

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#!/usr/bin/perl -w

# Convert .Xdefaults or similar terminal colors to iTerm2 scheme
# Only supports simple hex colors, no funny stuff

use strict;

print <<eof;
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

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import           Data.ByteString (ByteString)
import qualified Data.ByteString.Char8 as B8

import           Criterion.Main
import           Criterion.Types (Config (..))

import qualified Mystery

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FROM alpine:latest

COPY build.mk /tmp/

RUN apk add --update curl xz alpine-sdk perl gmp-dev file gmp openssh openssl zlib-dev strace vim less jq ncurses-dev bash autoconf

RUN cd /tmp && \
    wget http://ghc-musl-dist-apse2.s3-website-ap-southeast-2.amazonaws.com/ghc-7.8.4/ghc-7.8.4-x86_64-unknown-linux.tar.bz2 && \
    tar xvf ghc*.tar.bz2 && \
    cd ghc-7.8.4 && \

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Notes on cross-compiling GHC for a Darwin target.

TL;DR I managed to get most of a stage1 to build. I got a linker failure during ghc-prim, but most of the libraries had already built successfully, including some C FFI-heavy packages like bytestring. I suspect my toolchain was just in the wrong spot, and/or libraries misconfigured.

• We need a normal host GCC toolchain (build-essential), autoconf, happy, alex, and a platform copy of GHC (the Stage0).
• As per the GHC CrossCompiling page on Trac, we need a GCC crosschain. I used osxcross.

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Mafia Quick Start

Mafia is a wrapper for cabal-install that eliminates most of the pain points, without the need for a blessed set of packages.

Install, use, upgrade

Put the wrapper script somewhere on your path:

cd $HOME/bin && wget https://raw.githubusercontent.com/ambiata/mafia/master/script/mafia

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#!/bin/sh
if [ -z $1 ]; then echo "$0: Please supply a label"; exit 1; fi
launchctl list | grep -i "$1" | cut -f1 | grep -ve "^-" | xargs kill

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// loadavg.c
// Simple load average spewer for BSDs and Mac OS X
// tim at utf8.me
// (Why is there no system binary for this?)

#include <stdlib.h>
#include <stdio.h>

int main(int argc, char* argv[]) {
    double loads[3] = {0};