krops: add package

pkgs/default.nix

@@ -8,6 +8,7 @@ let self = {
   joinmarket = pkgs.callPackage ./joinmarket { inherit (self) nbPython3Packages; };
   generate-secrets = pkgs.callPackage ./generate-secrets { };
   nixops19_09 = pkgs.callPackage ./nixops { };
+  krops = import ./krops { };
   netns-exec = pkgs.callPackage ./netns-exec { };
   lightning-loop = pkgs.callPackage ./lightning-loop { };
   lightning-pool = pkgs.callPackage ./lightning-pool { };

pkgs/krops/default.nix

@@ -0,0 +1,12 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+  src = pkgs.fetchgit {
+    url = "https://cgit.krebsco.de/krops";
+    rev = "804c79a14dc8f81a602d31d5a1eed5f82b3f2457";
+    sha256 = "1k20l7zqprsrm9s38xslr7190vssf4sjdprd9gh146hxlvln2qrf";
+  };
+in {
+  lib = import "${src}/lib";
+  pkgs = import "${src}/pkgs" {};
+}

pkgs/krops/get-sha256.sh

@@ -0,0 +1,14 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p git
+set -euo pipefail
+
+archive_hash () {
+    repo=$1
+    rev=$2
+    nix-prefetch-url --unpack "https://github.com/${repo}/archive/${rev}.tar.gz" 2> /dev/null | tail -n 1
+}
+
+echo "Fetching latest krops commit"
+latest=$(git ls-remote https://github.com/krebs/krops master | cut -f 1)
+echo "rev: ${latest}"
+echo "sha256: $(archive_hash krebs/krops $latest)"