40     addHandler(cmd, description, builder, handler, commandMiddleware, deprecated) {  argument
44         if (Array.isArray(cmd)) {
45             if (isCommandAndAliases(cmd)) {
46                 [cmd, ...aliases] = cmd;
49                 for (const command of cmd) {
54         else if (isCommandHandlerDefinition(cmd)) {
55             let command = Array.isArray(cmd.command) || typeof cmd.command === 'string'
56                 ? cmd.command
57                 : this.moduleName(cmd);
58             if (cmd.aliases)
59                 command = [].concat(command).concat(cmd.aliases);
60 …this.addHandler(command, this.extractDesc(cmd), cmd.builder, cmd.handler, cmd.middlewares, cmd.dep…
64 …this.addHandler([cmd].concat(aliases), description, builder.builder, builder.handler, builder.midd…
67         if (typeof cmd === 'string') {
68             const parsedCommand = parseCommand(cmd);
69             aliases = aliases.map(alias => parseCommand(alias).cmd);
71             const parsedAliases = [parsedCommand.cmd].concat(aliases).filter(c => {
81                 parsedCommand.cmd = parsedAliases[0];
83                 cmd = cmd.replace(DEFAULT_MARKER, parsedCommand.cmd);
86                 this.aliasMap[alias] = parsedCommand.cmd;
89                 this.usage.command(cmd, description, isDefault, aliases, deprecated);
91             this.handlers[parsedCommand.cmd] = {
92                 original: cmd,
102                 this.defaultCommand = this.handlers[parsedCommand.cmd];
259         const cmd = positional.cmd[0];
261             positionalMap[cmd] = argv._.splice(0).map(String);
265                 positionalMap[cmd] = [String(argv._.shift())];
277             const [cmd, ...aliases] = d.cmd;
279                 parseOptions.array.push(cmd);
280                 parseOptions.default[cmd] = [];
282             parseOptions.alias[cmd] = aliases;
283             parseOptions.demand[cmd] = true;
286             const [cmd, ...aliases] = o.cmd;
288                 parseOptions.array.push(cmd);
289                 parseOptions.default[cmd] = [];
291             parseOptions.alias[cmd] = aliases;
421 function isCommandAndAliases(cmd) {  argument
422     return cmd.every(c => typeof c === 'string');
430 export function isCommandHandlerDefinition(cmd) {  argument
431     return typeof cmd === 'object' && !Array.isArray(cmd);