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import {  ParallelScripts,  ScriptDefinition,  ScriptOptions,} from "./scripts_config.ts";import { Command, isParallel, ParallelCommands } from "./command.ts";import { mergeParams } from "./merge_params.ts";import { isParallelScripts, isScriptObject } from "./util.ts";
/** * Normalizes a script definition to a list of `Command` objects */export function normalizeScript(  script: ScriptDefinition,  rootParams: ScriptOptions,): Array<Command | ParallelCommands | null> {  const res = _normalizeScript(script, rootParams);  return Array.isArray(res) ? res : [res];}
function _normalizeScript(  node: ScriptDefinition | ParallelScripts,  parentParams: ScriptOptions,): Command | ParallelCommands | Array<Command | ParallelCommands> | null {  if (typeof node === "string") {    return {      cmd: node.trim(),      ...mergeParams({}, parentParams),    } as Command;  }  if (Array.isArray(node)) {    return node.map((s) => _normalizeScript(s, parentParams)) as Array<      Command | ParallelCommands    >;  }  if (isParallelScripts(node)) {    return {      pll: node.pll.flatMap((s) => _normalizeScript(s, parentParams)),    } as ParallelCommands;  }  if (isScriptObject(node)) {    const { cmd, ...nodeParams } = node;    return _normalizeScript(      node.cmd,      mergeParams(nodeParams, parentParams),    ) as Command;  }  return null;}
export function flattenCommands(  commands: (Command | ParallelCommands | null)[],): Command[] {  return commands    .filter((c) => c !== null)    .flatMap((c) =>      c instanceof Object && isParallel(c) ? flattenCommands(c.pll) : c    ) as Command[];}