protoc-gen-dart: add passthru.updateScript

  pubspecLock = lib.importJSON ./pubspec.lock.json;

  passthru.updateScript = ./update.sh;

  meta = with lib; {

    description = "Protobuf plugin for generating Dart code";

    mainProgram = "protoc-gen-dart";

#!/usr/bin/env nix-shell

#!nix-shell -i bash -p yq ripgrep common-updater-scripts dart

set -xeu -o pipefail

PACKAGE_DIR="$(realpath "$(dirname "$0")")"

cd "$PACKAGE_DIR/.."

while ! test -f flake.nix; do cd .. ; done

NIXPKGS_DIR="$PWD"

version="$(

  list-git-tags --url=https://github.com/google/protobuf.dart \

  | rg '^protobuf-v(.*)' -r '$1' \

  | sort --version-sort \

  | tail -n1

)"

cd "$NIXPKGS_DIR"

update-source-version protoc-gen-dart "$version"

TMPDIR="$(mktemp -d)"

cd "$TMPDIR"

src="$(nix-build --no-link "$NIXPKGS_DIR" -A protoc-gen-dart.src)/protoc_plugin"

cp $src/pubspec.* .

if ! test -f pubspec.lock; then

  dart pub update

fi

yq . pubspec.lock > "$PACKAGE_DIR/pubspec.lock.json"

rm -rf "$TMPDIR"