krops: -> 1.26.2

Includes https://github.com/krebs/krops/commit/9fc8cbf8e826d4c8a118f37202ab3f335341082a

Add krops/fetch-release.sh

pkgs/krops/fetch-release.sh

@@ -0,0 +1,17 @@
+#! /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/${rev}.tar.gz" 2> /dev/null
+}
+
+echo "Fetching latest version"
+version=$(
+  git ls-remote --tags https://github.com/krebs/krops | cut -f 2 \
+    | sed -E 's|refs/tags/||g; s|((v)?(.*))|\1 \3|g' | sort -k 2 -V | tail -1 | cut -f 1 -d' '
+)
+echo "rev: ${version}"
+echo "sha256: $(archive_hash krebs/krops $version)"