uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/servers/nosql/cassandra/update-script.nix

@@ -0,0 +1,55 @@
+{ git
+, lib
+, runtimeShell
+, writeScript
+, generation
+, gnupg
+}:
+let
+  inherit (lib) makeBinPath;
+  filename = lib.strings.replaceStrings [ "_" ] [ "." ] generation + ".json";
+  regex = lib.strings.replaceStrings [ "_" ] [ "[.]" ] generation;
+in
+writeScript "update-cassandra_${generation}" ''
+  #!${runtimeShell}
+  set -eux -o pipefail
+  test -d pkgs -a -d nixos -a -d lib || {
+    echo >&2 "$0 expects to be run in a nixpkgs checkout"
+    exit 1
+  }
+  cd pkgs/servers/nosql/cassandra
+  PATH="${makeBinPath [git gnupg]}:$PATH"
+
+  tmp="$(mktemp -d)"
+  cleanup() {
+    rm -rf "$tmp"
+  }
+  trap cleanup EXIT
+
+  # get numeric-only versions, sort them latest first
+  git ls-remote --tags https://github.com/apache/cassandra \
+    | awk '{ if (match($0, /refs.tags.cassandra-([0-9.]*)$/, m)) print m[1] }' \
+    | sort -V \
+    | tac >$tmp/versions
+
+  version="$(grep -E '^${regex}' <$tmp/versions | head -n 1)"
+  path="cassandra/$version/apache-cassandra-$version-bin.tar.gz"
+  curl "https://downloads.apache.org/$path" >$tmp/src.tar.gz
+  curl "https://downloads.apache.org/$path.asc" >$tmp/src.tar.gz.asc
+
+  # See https://downloads.apache.org/cassandra/KEYS
+  # Make sure that any new key corresponds to someone on the project
+  for key in A4C465FEA0C552561A392A61E91335D77E3E87CB; do
+    gpg --trustdb-name "$tmp/trust.db" --batch --recv-keys "$key"
+    echo "$key:5:" | gpg --trustdb-name "$tmp/trust.db" --batch --import-ownertrust
+  done
+  gpg --trustdb-name "$tmp/trust.db" --batch --verify --trust-model direct $tmp/src.tar.gz.asc $tmp/src.tar.gz
+
+  hash="$(nix-prefetch-url "file://$tmp/src.tar.gz")"
+  cat >${filename} <<EOF
+  {
+    "version": "$version",
+    "sha256": "$hash"
+  }
+  EOF
+''