feat: support spaced commands

also known as nested commands.

Caveats:
  - Avoid declaring parent commands first. eg: "foo" should come after "foo bar"
  - Support for multiple actions per command has been removed

src/CAC.ts

@@ -185,15 +185,15 @@ class CAC extends EventEmitter {
     for (const command of this.commands) {
       const parsed = this.mri(argv.slice(2), command)
 
-      const commandName = parsed.args[0]
-      if (command.isMatched(commandName)) {
+      if (command.isMatched(parsed.args)) {
         shouldParse = false
         const parsedInfo = {
           ...parsed,
           args: parsed.args.slice(1),
         }
-        this.setParsedInfo(parsedInfo, command, commandName)
-        this.emit(`command:${commandName}`, command)
+        this.setParsedInfo(parsedInfo, command, command.name)
+        this.emit(`command:${command.name}`, command)
+        break
       }
     }
 

src/Command.ts

@@ -34,6 +34,7 @@ class Command {
   aliasNames: string[]
   /* Parsed command name */
   name: string
+  path: string[]
   args: CommandArg[]
   commandAction?: (...args: any[]) => any
   usageText?: string
@@ -51,6 +52,7 @@ class Command {
     this.options = []
     this.aliasNames = []
     this.name = removeBrackets(rawName)
+    this.path = this.name.split(' ')
     this.args = findAllBrackets(rawName)
     this.examples = []
   }
@@ -107,7 +109,14 @@ class Command {
    * Check if a command name is matched by this command
    * @param name Command name
    */
-  isMatched(name: string) {
+  isMatched(name: string | readonly string[]) {
+    if (this.path.length > 1) {
+      if (Array.isArray(name)) {
+        return this.path.every((part, i) => name[i] === part)
+      }
+    } else if (Array.isArray(name)) {
+      name = name[0]
+    }
     return this.name === name || this.aliasNames.includes(name)
   }