#!@bash@
packagePath() {
    jq --raw-output --arg name "$1" '.packages.[] | select(.name == $name) .rootUri | sub("file://"; "")' .dart_tool/package_config.json
}

# Runs a Dart executable from a package with a custom path.
#
# Usage:
# packageRunCustom <package> [executable] [bin_dir]
#
# By default, [bin_dir] is "bin", and [executable] is <package>.
# i.e. `packageRunCustom build_runner` is equivalent to `packageRunCustom build_runner build_runner bin`, which runs `bin/build_runner.dart` from the build_runner package.
packageRunCustom() {
    local args=()
    local passthrough=()

    while [ $# -gt 0 ]; do
        if [ "$1" != "--" ]; then
            args+=("$1")
            shift
        else
            shift
            passthrough=("$@")
            break
        fi
    done

    local name="${args[0]}"
    local path="${args[1]:-$name}"
    local prefix="${args[2]:-bin}"

    dart --packages=.dart_tool/package_config.json "$(packagePath "$name")/$prefix/$path.dart" "${passthrough[@]}"
}

# Runs a Dart executable from a package.
#
# Usage:
# packageRun <package> [-e executable] [...]
#
# To run an executable from an unconventional location, use packageRunCustom.
packageRun() {
    local name="build_runner"
    shift

    local executableName="$name"
    if [ "build_runner" = "-e" ]; then
      shift
      executableName="build_runner"
      shift
    fi

    fileName="$(yq --raw-output --arg name "$executableName" '.executables.[$name] // $name' "$(packagePath "$name")/pubspec.yaml")"
    packageRunCustom "$name" "$fileName" -- "$@"
}

packageRun build_runner "$@"