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import { env } from "./env.ts";import { Action, Task, TaskRegistry } from "./tasks.ts";import { abort } from "./utils.ts";
/** Global task registry. */const taskRegistry = new TaskRegistry();let isRunning = false;
/** Set description of next registered task. */export function desc(description: string): void {  taskRegistry.desc(description);}
/** * Create and register a task. Returns the task object. * * - `name` is a unique task name. * - `prereqs` is an array of prerequisite task names.  Prerequisites can be *   normal task names, file task names, file paths or globs (wildcards). * - `action` is an optional function that is run if the task is selected for *   execution (`type Action = (this: Task) => any;`). * - To fetch an existing task omit both the `prereqs` and `action` parameters. */export function task(name: string, prereqs?: string[], action?: Action): Task {  if (prereqs !== undefined) {    taskRegistry.register(name, prereqs, action);  }  return taskRegistry.get(name);}
/** * Execute named tasks along with their prerequisite tasks (direct and * indirect). If no task names are specified then the command-line tasks are run. * If no command-line tasks were specified the default task (set in * `env("--default-task")`) is run. * * Task execution is ordered such that prerequisite tasks are executed prior to * their parent task. The same task is never run twice. */export async function run(...taskNames: string[]) {  if (env("--help") || env("--version")) {    return;  }  if (env("--list-tasks") || env("--list-all")) {    taskRegistry.list().forEach((t: unknown) => console.log(t));  } else {    if (taskNames.length === 0) {      taskNames = env("--tasks");      if (taskNames.length === 0 && env("--default-task")) {        taskNames.push(env("--default-task"));      }    }    if (taskNames.length === 0) {      abort(        "no task specified (use the --list-tasks option to list tasks, --help for help)",      );    }    isRunning = true;    try {      await taskRegistry.run(...taskNames);    } finally {      isRunning = false;    }  }}
/** * Execute task action functions. * First the non-async actions are executed synchronously then the * async actions are exectuted asynchronously. * Silently skip tasks that have no action function. */export async function execute(...taskNames: string[]) {  if (!isRunning) {    // Necessary because the `run` API ensures the Drake cache file is saved.    abort("'execute' API must be called by 'run' API");  }  await taskRegistry.execute(...taskNames);}