easy-dhall-nix/dhall-nix-simple.nix

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{ pkgs ? import <nixpkgs> {} }:
pkgs.stdenv.mkDerivation rec {
name = "dhall-nix-simple";
src = if pkgs.stdenv.isDarwin
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then pkgs.fetchurl {
url = "https://github.com/dhall-lang/dhall-haskell/releases/download/1.26.1/dhall-nix-1.1.8-x86_64-macos.tar.bz2";
sha256 = "0dgg5iljf8crx5vas8v5lz79h5kk4ss6vg1ngavs32vshzs9q9kc";
}
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else pkgs.fetchurl {
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url = "https://github.com/dhall-lang/dhall-haskell/releases/download/1.26.1/dhall-nix-1.1.8-x86_64-linux.tar.bz2";
sha256 = "1mqkk598xx4hbpq9az9biwzc4gwmxb98wjm2ss0agvpdr75w5xm4";
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};
installPhase = ''
mkdir -p $out/bin
DHALL_TO_NIX=$out/bin/dhall-to-nix
install -D -m555 -T dhall-to-nix $DHALL_TO_NIX
mkdir -p $out/etc/bash_completion.d/
$DHALL_TO_NIX --bash-completion-script $DHALL_TO_NIX > $out/etc/bash_completion.d/dhall-to-nix-completion.bash
'';
}