Nix pill 12

autotools.nix

pkgs: attrs:
  with pkgs;
  let defaultAttrs = {
    builder = "${bash}/bin/bash";
    args = [ ./builder.sh ];
    setup = ./setup.sh;
    # binutils-unwrapped provides the ar utility
    baseInputs = [ gnutar gzip gnumake gcc binutils-unwrapped coreutils gawk gnused gnugrep patchelf findutils ];
    buildInputs = [];
    system = builtins.currentSystem;
  };
  in
  derivation (defaultAttrs // attrs)

builder.sh

set -e
source $setup
genericBuild

default.nix

let
  pkgs = import <nixpkgs> {};
  mkDerivation = import ./autotools.nix pkgs;
in with pkgs; {
  hello = import ./hello.nix { inherit mkDerivation; }; 
  graphviz = import ./graphviz.nix { inherit mkDerivation gd fontconfig libjpeg bzip2; };
  graphvizCore = import ./graphviz.nix {
    inherit mkDerivation gd fontconfig libjpeg bzip2;
    gdSupport = false;
  };
}

graphviz.nix

{ mkDerivation, gdSupport ? true, gd, fontconfig, libjpeg, bzip2 }:

mkDerivation {
  name = "graphviz";
  src = ./graphviz-2.38.0.tar.gz;
  buildInputs = if gdSupport then [ gd fontconfig libjpeg bzip2 ] else [];
}

hello.nix

{ mkDerivation }:

mkDerivation {
  name = "hello";
  src = ./hello-2.9.tar.gz;
}

setup.sh

unset PATH
for p in $baseInputs $buildInputs; do
  if [ -d $p/bin ]; then
    export PATH="$p/bin${PATH:+:}$PATH"
  fi
  if [ -d $p/include ]; then
    export NIX_CFLAGS_COMPILE="-I $p/include${NIX_CFLAGS_COMPILE:+ }$NIX_CFLAGS_COMPILE"
  fi
  if [ -d $p/lib ]; then
    export NIX_LDFLAGS="-rpath $p/lib -L $p/lib${NIX_LDFLAGS:+ }$NIX_LDFLAGS"
  fi
done

function unpackPhase() {
  tar -xzf $src

  for d in *; do
    if [ -d "$d" ]; then
      cd "$d"
      break
    fi
  done
}

function configurePhase() {
  ./configure --prefix=$out
}

function buildPhase() {
  make
}

function installPhase() {
  make install
}

function fixupPhase() {
  find $out -type f -exec patchelf --shrink-rpath '{}' \; -exec strip '{}' \; 2>/dev/null 
}

function genericBuild() {
  unpackPhase
  configurePhase
  buildPhase
  installPhase
  fixupPhase
}