trustedcoin: add pkg

pkgs/trustedcoin/get-sha256.sh

@@ -0,0 +1,20 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p git gnupg curl jq
+set -euo pipefail
+
+
+TMPDIR="$(mktemp -d -p /tmp)"
+trap 'rm -rf $TMPDIR' EXIT
+cd "$TMPDIR"
+
+echo "Fetching latest release"
+repo='nbd-wtf/trustedcoin'
+latest=$(curl --location --silent --show-error https://api.github.com/repos/${repo}/releases/latest | jq -r .tag_name)
+echo "Latest release is $latest"
+git clone --depth 1 --branch "$latest" "https://github.com/${repo}" 2>/dev/null
+cd trustedcoin
+
+echo "tag: $latest"
+git checkout -q "tags/$latest"
+rm -rf .git
+nix --extra-experimental-features nix-command hash path .