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/applications/audio/plexamp/update-plexamp.sh

@@ -0,0 +1,54 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -p yq bash curl bc ripgrep
+#! nix-shell -i bash
+
+set -Eeuxo pipefail
+
+cleanup() {
+    rm -rf "$TMPDIR"
+}
+
+trap cleanup EXIT
+
+ROOT="$(dirname "$(readlink -f "$0")")"
+if [ ! -f "$ROOT/default.nix" ]; then
+  echo "ERROR: cannot find default.nix in $ROOT"
+  exit 1
+fi
+
+if [ "$(basename "$ROOT")" != plexamp ]; then
+  echo "ERROR: folder not named plexamp"
+  exit 1
+fi
+
+TMPDIR="$(mktemp -d)"
+
+VERSION_FILE="$TMPDIR/version.yml"
+VERSION_URL="https://plexamp.plex.tv/plexamp.plex.tv/desktop/latest-linux.yml"
+curl "$VERSION_URL" -o "$VERSION_FILE"
+
+VERSION="$(yq -r .version "$VERSION_FILE")"
+SHA512="$(yq -r .sha512 "$VERSION_FILE")"
+
+DEFAULT_NIX="$ROOT/default.nix"
+WORKING_NIX="$TMPDIR/default.nix"
+cp "$DEFAULT_NIX" "$WORKING_NIX"
+
+sed -i "s@version = .*;@version = \"$VERSION\";@g" "$WORKING_NIX"
+
+if diff "$DEFAULT_NIX" "$WORKING_NIX"; then
+  echo "WARNING: no changes"
+  exit 0
+fi
+
+# update sha hash (convenietly provided)
+sed -i "s@sha.* = .*;@sha512 = \"$SHA512\";@g" "$WORKING_NIX"
+
+# update the changelog ("just" increment the number)
+CHANGELOG_URL=$(rg --only-matching 'changelog = "(.+)";' --replace '$1' $WORKING_NIX)
+CHANGELOG_NUMBER=$(rg --only-matching '.*/([0-9]+)' --replace '$1' <<< $CHANGELOG_URL)
+NEXT_CHANGELOG=$(($CHANGELOG_NUMBER + 1))
+NEXT_URL=$(rg --only-matching '(.*)/[0-9]+' --replace "\$1/$NEXT_CHANGELOG" <<< $CHANGELOG_URL)
+sed -i "s@changelog = \".*\";@changelog = \"$NEXT_URL\";@" $WORKING_NIX
+
+mv $WORKING_NIX $DEFAULT_NIX