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/web-apps/hedgedoc/update.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -I nixpkgs=../../../../ -i bash -p nix wget prefetch-yarn-deps nix-prefetch-github
+
+if [ "$#" -gt 1 ] || [[ "$1" == -* ]]; then
+  echo "Regenerates packaging data for the element packages."
+  echo "Usage: $0 [git release tag]"
+  exit 1
+fi
+
+version="$1"
+
+set -euo pipefail
+
+if [ -z "$version" ]; then
+  version="$(wget -O- "https://api.github.com/repos/hedgedoc/hedgedoc/releases?per_page=1" | jq -r '.[0].tag_name')"
+fi
+
+src="https://raw.githubusercontent.com/hedgedoc/hedgedoc/$version"
+wget "$src/package.json" -O package.json
+wget "$src/yarn.lock" -O yarn.lock
+sed 's;midi "https://github\.com/paulrosen/MIDI\.js\.git;midi "git+https://github.com/paulrosen/MIDI.js.git;g' -i yarn.lock
+
+src_hash=$(nix-prefetch-github hedgedoc hedgedoc --rev ${version} | jq -r .sha256)
+yarn_hash=$(prefetch-yarn-deps yarn.lock)
+
+cat > pin.json << EOF
+{
+  "version": "$version",
+  "srcHash": "$src_hash",
+  "yarnHash": "$yarn_hash"
+}
+EOF