fix: merge dot-nested options

examples/dot-nested-options.js

@@ -4,6 +4,7 @@ const cli = require('../src/index')()
 cli
   .command('build', 'desc')
   .option('--env <env>', 'Set envs')
+  .option('--foo-bar <value>', 'Set foo bar')
   .example('--env.API_SECRET xxx')
   .action(options => {
     console.log(options)

src/index.ts

@@ -3,7 +3,7 @@ import path from 'path'
 import mri, { Options as MriOpts } from 'mri'
 import Command, { CommandConfig, HelpCallback, CommandExample } from './Command'
 import { OptionConfig } from './Option'
-import { getMriOptions, camelcase } from './utils'
+import { getMriOptions, camelcase, setDotProp } from './utils'
 
 interface ParsedArgv {
   args: ReadonlyArray<string>
@@ -192,7 +192,10 @@ class CAC extends EventEmitter {
       '--': argsAfterDoubleDashes
     }
     for (const key of Object.keys(parsed)) {
-      options[camelcase(key)] = parsed[key]
+      const keys = key.split('.').map((v, i) => {
+        return i === 0 ? camelcase(v) : v
+      })
+      setDotProp(options, keys, parsed[key])
     }
 
     return {

src/utils.ts

@@ -84,3 +84,25 @@ export const camelcase = (input: string) => {
     return p1 + p2.toUpperCase()
   })
 }
+
+export const setDotProp = (
+  obj: { [k: string]: any },
+  keys: string[],
+  val: any
+) => {
+  let i = 0
+  let length = keys.length
+  let t = obj
+  let x
+  for (; i < length; ++i) {
+    x = t[keys[i]]
+    t = t[keys[i]] =
+      i === length - 1
+        ? val
+        : x != null
+        ? x
+        : !!~keys[i + 1].indexOf('.') || !(+keys[i + 1] > -1)
+        ? {}
+        : []
+  }
+}