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

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{ pkgs ? import <nixpkgs> {} }:
pkgs.stdenv.mkDerivation rec {
name = "dhall-bash-simple";
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src = if pkgs.stdenv.isDarwin
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then pkgs.fetchurl {
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url = "https://github.com/dhall-lang/dhall-haskell/releases/download/1.29.0/dhall-bash-1.0.27-x86_64-macos.tar.bz2";
sha256 = "1zi37x1ifl0qxd7lby72snkf5mmg1xaclm7v815grdvjs08dg4vb";
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}
else pkgs.fetchurl {
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url = "https://github.com/dhall-lang/dhall-haskell/releases/download/1.29.0/dhall-bash-1.0.27-x86_64-linux.tar.bz2";
sha256 = "0rbj42dgsms7074zqsnf6fs0l000mw4ah87ng9411ysaaf3fn35b";
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};
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installPhase = ''
mkdir -p $out/bin
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DHALL_TO_BASH=$out/bin/dhall-to-bash
install -D -m555 -T dhall-to-bash $DHALL_TO_BASH
mkdir -p $out/etc/bash_completion.d/
$DHALL_TO_BASH --bash-completion-script $DHALL_TO_BASH > $out/etc/bash_completion.d/dhall-to-bash-completion.bash
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'';
}