krops: add package

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)"