feat: also add camelCase array options (#125)

Author: laggingreflex

index.js

@@ -1,4 +1,5 @@
 var camelCase = require('camelcase')
+var decamelize = require('decamelize')
 var path = require('path')
 var tokenizeArgString = require('./lib/tokenize-arg-string')
 var util = require('util')
@@ -674,6 +675,16 @@ function parse (args, opts) {
             }
           }
         })
+        // For "--optionName", also set argv['option-name']
+        flags.aliases[key].concat(key).forEach(function (x) {
+          if (/[A-Z]/.test(x) && configuration['camel-case-expansion']) {
+            var c = decamelize(x, '-')
+            if (c !== key && flags.aliases[key].indexOf(c) === -1) {
+              flags.aliases[key].push(c)
+              newAliases[c] = true
+            }
+          }
+        })
         flags.aliases[key].forEach(function (x) {
           flags.aliases[x] = [key].concat(flags.aliases[key].filter(function (y) {
             return x !== y

package.json

@@ -34,7 +34,8 @@
     "standard-version": "^4.3.0"
   },
   "dependencies": {
-    "camelcase": "^4.1.0"
+    "camelcase": "^4.1.0",
+    "decamelize": "^2.0.0"
   },
   "files": [
     "lib",

test/yargs-parser.js

@@ -1529,6 +1529,35 @@ describe('yargs-parser', function () {
       var result = parser(['-x', 'val1', '-x', 'val1'])
       result.should.have.property('x').that.is.an('array').and.to.deep.equal(['val1', 'val1'])
     })
+
+    it('should eat camelCase switch with camelCase array option', function () {
+      var result = parser(['--someOption', '1', '2'], {
+        array: ['someOption']
+      })
+      Array.isArray(result.someOption).should.equal(true)
+      result.someOption.should.deep.equal([1, 2])
+    })
+    it('should eat hyphenated switch with hyphenated array option', function () {
+      var result = parser(['--some-option', '1', '2'], {
+        array: ['some-option']
+      })
+      Array.isArray(result['some-option']).should.equal(true)
+      result['some-option'].should.deep.equal([1, 2])
+    })
+    it('should eat camelCase switch with hyphenated array option', function () {
+      var result = parser(['--someOption', '1', '2'], {
+        array: ['some-option']
+      })
+      Array.isArray(result['some-option']).should.equal(true)
+      result['some-option'].should.deep.equal([1, 2])
+    })
+    it('should eat hyphenated switch with camelCase array option', function () {
+      var result = parser(['--some-option', '1', '2'], {
+        array: ['someOption']
+      })
+      Array.isArray(result['someOption']).should.equal(true)
+      result['someOption'].should.deep.equal([1, 2])
+    })
   })
 
   describe('nargs', function () {