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import { assertNotStrictEqual, } from './typings/common-types.js'; import { isPromise } from './utils/is-promise.js'; import { applyMiddleware, commandMiddlewareFactory, } from './middleware.js'; import { parseCommand } from './parse-command.js'; import { isYargsInstance, } from './yargs-factory.js'; import { maybeAsyncResult } from './utils/maybe-async-result.js'; import whichModule from './utils/which-module.js'; const DEFAULT_MARKER = /(^\*)|(^\$0)/; export class CommandInstance { constructor(usage, validation, globalMiddleware, shim) { this.requireCache = new Set(); this.handlers = {}; this.aliasMap = {}; this.frozens = []; this.shim = shim; this.usage = usage; this.globalMiddleware = globalMiddleware; this.validation = validation; } addDirectory(dir, req, callerFile, opts) { opts = opts || {}; if (typeof opts.recurse !== 'boolean') opts.recurse = false; if (!Array.isArray(opts.extensions)) opts.extensions = ['js']; const parentVisit = typeof opts.visit === 'function' ? opts.visit : (o) => o; opts.visit = (obj, joined, filename) => { const visited = parentVisit(obj, joined, filename); if (visited) { if (this.requireCache.has(joined)) return visited; else this.requireCache.add(joined); this.addHandler(visited); } return visited; }; this.shim.requireDirectory({ require: req, filename: callerFile }, dir, opts); } addHandler(cmd, description, builder, handler, commandMiddleware, deprecated) { let aliases = []; const middlewares = commandMiddlewareFactory(commandMiddleware); handler = handler || (() => { }); if (Array.isArray(cmd)) { if (isCommandAndAliases(cmd)) { [cmd, ...aliases] = cmd; } else { for (const command of cmd) { this.addHandler(command); } } } else if (isCommandHandlerDefinition(cmd)) { let command = Array.isArray(cmd.command) || typeof cmd.command === 'string' ? cmd.command : this.moduleName(cmd); if (cmd.aliases) command = [].concat(command).concat(cmd.aliases); this.addHandler(command, this.extractDesc(cmd), cmd.builder, cmd.handler, cmd.middlewares, cmd.deprecated); return; } else if (isCommandBuilderDefinition(builder)) { this.addHandler([cmd].concat(aliases), description, builder.builder, builder.handler, builder.middlewares, builder.deprecated); return; } if (typeof cmd === 'string') { const parsedCommand = parseCommand(cmd); aliases = aliases.map(alias => parseCommand(alias).cmd); let isDefault = false; const parsedAliases = [parsedCommand.cmd].concat(aliases).filter(c => { if (DEFAULT_MARKER.test(c)) { isDefault = true; return false; } return true; }); if (parsedAliases.length === 0 && isDefault) parsedAliases.push('$0'); if (isDefault) { parsedCommand.cmd = parsedAliases[0]; aliases = parsedAliases.slice(1); cmd = cmd.replace(DEFAULT_MARKER, parsedCommand.cmd); } aliases.forEach(alias => { this.aliasMap[alias] = parsedCommand.cmd; }); if (description !== false) { this.usage.command(cmd, description, isDefault, aliases, deprecated); } this.handlers[parsedCommand.cmd] = { original: cmd, description, handler, builder: builder || {}, middlewares, deprecated, demanded: parsedCommand.demanded, optional: parsedCommand.optional, }; if (isDefault) this.defaultCommand = this.handlers[parsedCommand.cmd]; } } getCommandHandlers() { return this.handlers; } getCommands() { return Object.keys(this.handlers).concat(Object.keys(this.aliasMap)); } hasDefaultCommand() { return !!this.defaultCommand; } runCommand(command, yargs, parsed, commandIndex, helpOnly, helpOrVersionSet) { const commandHandler = this.handlers[command] || this.handlers[this.aliasMap[command]] || this.defaultCommand; const currentContext = yargs.getInternalMethods().getContext(); const parentCommands = currentContext.commands.slice(); const isDefaultCommand = !command; if (command) { currentContext.commands.push(command); currentContext.fullCommands.push(commandHandler.original); } const builderResult = this.applyBuilderUpdateUsageAndParse(isDefaultCommand, commandHandler, yargs, parsed.aliases, parentCommands, commandIndex, helpOnly, helpOrVersionSet); return isPromise(builderResult) ? builderResult.then(result => this.applyMiddlewareAndGetResult(isDefaultCommand, commandHandler, result.innerArgv, currentContext, helpOnly, result.aliases, yargs)) : this.applyMiddlewareAndGetResult(isDefaultCommand, commandHandler, builderResult.innerArgv, currentContext, helpOnly, builderResult.aliases, yargs); } applyBuilderUpdateUsageAndParse(isDefaultCommand, commandHandler, yargs, aliases, parentCommands, commandIndex, helpOnly, helpOrVersionSet) { const builder = commandHandler.builder; let innerYargs = yargs; if (isCommandBuilderCallback(builder)) { yargs.getInternalMethods().getUsageInstance().freeze(); const builderOutput = builder(yargs.getInternalMethods().reset(aliases), helpOrVersionSet); if (isPromise(builderOutput)) { return builderOutput.then(output => { innerYargs = isYargsInstance(output) ? output : yargs; return this.parseAndUpdateUsage(isDefaultCommand, commandHandler, innerYargs, parentCommands, commandIndex, helpOnly); }); } } else if (isCommandBuilderOptionDefinitions(builder)) { yargs.getInternalMethods().getUsageInstance().freeze(); innerYargs = yargs.getInternalMethods().reset(aliases); Object.keys(commandHandler.builder).forEach(key => { innerYargs.option(key, builder[key]); }); } return this.parseAndUpdateUsage(isDefaultCommand, commandHandler, innerYargs, parentCommands, commandIndex, helpOnly); } parseAndUpdateUsage(isDefaultCommand, commandHandler, innerYargs, parentCommands, commandIndex, helpOnly) { if (isDefaultCommand) innerYargs.getInternalMethods().getUsageInstance().unfreeze(true); if (this.shouldUpdateUsage(innerYargs)) { innerYargs .getInternalMethods() .getUsageInstance() .usage(this.usageFromParentCommandsCommandHandler(parentCommands, commandHandler), commandHandler.description); } const innerArgv = innerYargs .getInternalMethods() .runYargsParserAndExecuteCommands(null, undefined, true, commandIndex, helpOnly); return isPromise(innerArgv) ? innerArgv.then(argv => ({ aliases: innerYargs.parsed.aliases, innerArgv: argv, })) : { aliases: innerYargs.parsed.aliases, innerArgv: innerArgv, }; } shouldUpdateUsage(yargs) { return (!yargs.getInternalMethods().getUsageInstance().getUsageDisabled() && yargs.getInternalMethods().getUsageInstance().getUsage().length === 0); } usageFromParentCommandsCommandHandler(parentCommands, commandHandler) { const c = DEFAULT_MARKER.test(commandHandler.original) ? commandHandler.original.replace(DEFAULT_MARKER, '').trim() : commandHandler.original; const pc = parentCommands.filter(c => { return !DEFAULT_MARKER.test(c); }); pc.push(c); return `$0 ${pc.join(' ')}`; } handleValidationAndGetResult(isDefaultCommand, commandHandler, innerArgv, currentContext, aliases, yargs, middlewares, positionalMap) { if (!yargs.getInternalMethods().getHasOutput()) { const validation = yargs .getInternalMethods() .runValidation(aliases, positionalMap, yargs.parsed.error, isDefaultCommand); innerArgv = maybeAsyncResult(innerArgv, result => { validation(result); return result; }); } if (commandHandler.handler && !yargs.getInternalMethods().getHasOutput()) { yargs.getInternalMethods().setHasOutput(); const populateDoubleDash = !!yargs.getOptions().configuration['populate--']; yargs .getInternalMethods() .postProcess(innerArgv, populateDoubleDash, false, false); innerArgv = applyMiddleware(innerArgv, yargs, middlewares, false); innerArgv = maybeAsyncResult(innerArgv, result => { const handlerResult = commandHandler.handler(result); return isPromise(handlerResult) ? handlerResult.then(() => result) : result; }); if (!isDefaultCommand) { yargs.getInternalMethods().getUsageInstance().cacheHelpMessage(); } if (isPromise(innerArgv) && !yargs.getInternalMethods().hasParseCallback()) { innerArgv.catch(error => { try { yargs.getInternalMethods().getUsageInstance().fail(null, error); } catch (_err) { } }); } } if (!isDefaultCommand) { currentContext.commands.pop(); currentContext.fullCommands.pop(); } return innerArgv; } applyMiddlewareAndGetResult(isDefaultCommand, commandHandler, innerArgv, currentContext, helpOnly, aliases, yargs) { let positionalMap = {}; if (helpOnly) return innerArgv; if (!yargs.getInternalMethods().getHasOutput()) { positionalMap = this.populatePositionals(commandHandler, innerArgv, currentContext, yargs); } const middlewares = this.globalMiddleware .getMiddleware() .slice(0) .concat(commandHandler.middlewares); const maybePromiseArgv = applyMiddleware(innerArgv, yargs, middlewares, true); return isPromise(maybePromiseArgv) ? maybePromiseArgv.then(resolvedInnerArgv => this.handleValidationAndGetResult(isDefaultCommand, commandHandler, resolvedInnerArgv, currentContext, aliases, yargs, middlewares, positionalMap)) : this.handleValidationAndGetResult(isDefaultCommand, commandHandler, maybePromiseArgv, currentContext, aliases, yargs, middlewares, positionalMap); } populatePositionals(commandHandler, argv, context, yargs) { argv._ = argv._.slice(context.commands.length); const demanded = commandHandler.demanded.slice(0); const optional = commandHandler.optional.slice(0); const positionalMap = {}; this.validation.positionalCount(demanded.length, argv._.length); while (demanded.length) { const demand = demanded.shift(); this.populatePositional(demand, argv, positionalMap); } while (optional.length) { const maybe = optional.shift(); this.populatePositional(maybe, argv, positionalMap); } argv._ = context.commands.concat(argv._.map(a => '' + a)); this.postProcessPositionals(argv, positionalMap, this.cmdToParseOptions(commandHandler.original), yargs); return positionalMap; } populatePositional(positional, argv, positionalMap) { const cmd = positional.cmd[0]; if (positional.variadic) { positionalMap[cmd] = argv._.splice(0).map(String); } else { if (argv._.length) positionalMap[cmd] = [String(argv._.shift())]; } } cmdToParseOptions(cmdString) { const parseOptions = { array: [], default: {}, alias: {}, demand: {}, }; const parsed = parseCommand(cmdString); parsed.demanded.forEach(d => { const [cmd, ...aliases] = d.cmd; if (d.variadic) { parseOptions.array.push(cmd); parseOptions.default[cmd] = []; } parseOptions.alias[cmd] = aliases; parseOptions.demand[cmd] = true; }); parsed.optional.forEach(o => { const [cmd, ...aliases] = o.cmd; if (o.variadic) { parseOptions.array.push(cmd); parseOptions.default[cmd] = []; } parseOptions.alias[cmd] = aliases; }); return parseOptions; } postProcessPositionals(argv, positionalMap, parseOptions, yargs) { const options = Object.assign({}, yargs.getOptions()); options.default = Object.assign(parseOptions.default, options.default); for (const key of Object.keys(parseOptions.alias)) { options.alias[key] = (options.alias[key] || []).concat(parseOptions.alias[key]); } options.array = options.array.concat(parseOptions.array); options.config = {}; const unparsed = []; Object.keys(positionalMap).forEach(key => { positionalMap[key].map(value => { if (options.configuration['unknown-options-as-args']) options.key[key] = true; unparsed.push(`--${key}`); unparsed.push(value); }); }); if (!unparsed.length) return; const config = Object.assign({}, options.configuration, { 'populate--': false, }); const parsed = this.shim.Parser.detailed(unparsed, Object.assign({}, options, { configuration: config, })); if (parsed.error) { yargs .getInternalMethods() .getUsageInstance() .fail(parsed.error.message, parsed.error); } else { const positionalKeys = Object.keys(positionalMap); Object.keys(positionalMap).forEach(key => { positionalKeys.push(...parsed.aliases[key]); }); Object.keys(parsed.argv).forEach(key => { if (positionalKeys.includes(key)) { if (!positionalMap[key]) positionalMap[key] = parsed.argv[key]; if (!this.isInConfigs(yargs, key) && !this.isDefaulted(yargs, key) && Object.prototype.hasOwnProperty.call(argv, key) && Object.prototype.hasOwnProperty.call(parsed.argv, key) && (Array.isArray(argv[key]) || Array.isArray(parsed.argv[key]))) { argv[key] = [].concat(argv[key], parsed.argv[key]); } else { argv[key] = parsed.argv[key]; } } }); } } isDefaulted(yargs, key) { const { default: defaults } = yargs.getOptions(); return (Object.prototype.hasOwnProperty.call(defaults, key) || Object.prototype.hasOwnProperty.call(defaults, this.shim.Parser.camelCase(key))); } isInConfigs(yargs, key) { const { configObjects } = yargs.getOptions(); return (configObjects.some(c => Object.prototype.hasOwnProperty.call(c, key)) || configObjects.some(c => Object.prototype.hasOwnProperty.call(c, this.shim.Parser.camelCase(key)))); } runDefaultBuilderOn(yargs) { if (!this.defaultCommand) return; if (this.shouldUpdateUsage(yargs)) { const commandString = DEFAULT_MARKER.test(this.defaultCommand.original) ? this.defaultCommand.original : this.defaultCommand.original.replace(/^[^[\]<>]*/, '$0 '); yargs .getInternalMethods() .getUsageInstance() .usage(commandString, this.defaultCommand.description); } const builder = this.defaultCommand.builder; if (isCommandBuilderCallback(builder)) { return builder(yargs, true); } else if (!isCommandBuilderDefinition(builder)) { Object.keys(builder).forEach(key => { yargs.option(key, builder[key]); }); } return undefined; } moduleName(obj) { const mod = whichModule(obj); if (!mod) throw new Error(`No command name given for module: ${this.shim.inspect(obj)}`); return this.commandFromFilename(mod.filename); } commandFromFilename(filename) { return this.shim.path.basename(filename, this.shim.path.extname(filename)); } extractDesc({ describe, description, desc }) { for (const test of [describe, description, desc]) { if (typeof test === 'string' || test === false) return test; assertNotStrictEqual(test, true, this.shim); } return false; } freeze() { this.frozens.push({ handlers: this.handlers, aliasMap: this.aliasMap, defaultCommand: this.defaultCommand, }); } unfreeze() { const frozen = this.frozens.pop(); assertNotStrictEqual(frozen, undefined, this.shim); ({ handlers: this.handlers, aliasMap: this.aliasMap, defaultCommand: this.defaultCommand, } = frozen); } reset() { this.handlers = {}; this.aliasMap = {}; this.defaultCommand = undefined; this.requireCache = new Set(); return this; } } export function command(usage, validation, globalMiddleware, shim) { return new CommandInstance(usage, validation, globalMiddleware, shim); } export function isCommandBuilderDefinition(builder) { return (typeof builder === 'object' && !!builder.builder && typeof builder.handler === 'function'); } function isCommandAndAliases(cmd) { return cmd.every(c => typeof c === 'string'); } export function isCommandBuilderCallback(builder) { return typeof builder === 'function'; } function isCommandBuilderOptionDefinitions(builder) { return typeof builder === 'object'; } export function isCommandHandlerDefinition(cmd) { return typeof cmd === 'object' && !Array.isArray(cmd); }