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/tools/admin/meshcentral/update.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p nodejs yarn yarn2nix jq rsync common-updater-scripts moreutils
+
+set -exuo pipefail
+
+expr_dir=$(cd "$(dirname "$0")"; pwd)
+tmp=$(mktemp -dt update-meshcentral.XXXXXX)
+
+npm show --json meshcentral > "$tmp/npm.json"
+version=$(<"$tmp/npm.json" jq -r .version)
+tarball=$(<"$tmp/npm.json" jq -r .dist.tarball)
+
+prefetch=$(nix-prefetch-url --unpack --print-path "$tarball" | tr '\n' ' ')
+read -r hash storePath <<<"$prefetch"
+cd "$tmp"
+rsync -r --chmod=u=rwX "$storePath/" package/
+cd package
+
+# Very crude way of discovering optional dependencies. These are
+# fetched at runtime by stock upstream, but we don't allow that kind
+# of thing in nix :)
+awk <meshcentral.js "
+  BEGIN { RS=\"[\n;]\" }
+  match(\$0, /(modules|passport) = (\[.*\])$/, a) { print a[2] }
+  match(\$0, /(modules|passport).push\(('[^']+')\)/, a) { print a[2] }
+" |
+    tr \' \" |
+    jq --slurp '[if type == "array" then .[] else . end] | flatten' |
+    # And an equally crude way of adding them to package.json. We
+    # can't use yarn add here, because that will blow up on
+    # dependencies which don't support the current platform. Even with
+    # --optional.
+    jq --slurpfile package package.json \
+       '(. | map(. | capture("(?<name>@?[^@]+)(@(?<version>.+))?") | { key: .name, value: (.version // "*")}) | from_entries) as $optionalDependencies | $package | .[] | .optionalDependencies |= . + $optionalDependencies' |
+    sponge package.json
+
+# Fetch all the optional dependencies, so we have them available in
+# yarn.lock/yarn.nix
+yarn install --ignore-scripts
+
+cp package.json "$expr_dir"
+cp yarn.lock "$expr_dir/yarn.lock"
+yarn2nix > "$expr_dir/yarn.nix"
+
+cd "$expr_dir/../../../.."
+update-source-version meshcentral "$version" "$hash" "$tarball"
+
+# Only clean up if everything worked
+cd /
+rm -rf "$tmp"