Add no-missing-keys-in-other-locales rule and change no-missing-keys rule to not report if there is one matching key (#148)

* Add `no-missing-keys-in-other-locales` rule and change `no-missing-keys` rule to not report if there is one matching key

* fixes

Author: ota-meshi

docs/rules/README.md

@@ -20,5 +20,6 @@
 | [@intlify/vue-i18n/<wbr>key-format-style](./key-format-style.html) | enforce specific casing for localization keys |  |
 | [@intlify/vue-i18n/<wbr>no-duplicate-keys-in-locale](./no-duplicate-keys-in-locale.html) | disallow duplicate localization keys within the same locale |  |
 | [@intlify/vue-i18n/<wbr>no-dynamic-keys](./no-dynamic-keys.html) | disallow localization dynamic keys at localization methods |  |
+| [@intlify/vue-i18n/<wbr>no-missing-keys-in-other-locales](./no-missing-keys-in-other-locales.html) | disallow missing locale message keys in other locales |  |
 | [@intlify/vue-i18n/<wbr>no-unused-keys](./no-unused-keys.html) | disallow unused localization keys | :black_nib: |
 

docs/rules/no-missing-keys-in-other-locales.md

@@ -0,0 +1,57 @@
+# @intlify/vue-i18n/no-missing-keys-in-other-locales
+
+> disallow missing locale message keys in other locales
+
+This rule warns if a key with the same path as the key of resource does not exist in another locale.
+
+## :book: Rule Details
+
+:-1: Examples of **incorrect** code for this rule:
+
+locale messages:
+
+```json5
+{
+  "en": {
+    /* ✓ GOOD */
+    "hello": "Hello!",
+    /* ✗ BAD */
+    "goodbye": "Goodbye!"
+  },
+  "ja": {
+    "hello": "こんにちは!"
+  }
+}
+```
+
+:+1: Examples of **correct** code for this rule:
+
+locale messages:
+
+```json5
+{
+  "en": {
+    /* ✓ GOOD */
+    "hello": "Hello!",
+    "goodbye": "Goodbye!"
+  },
+  "ja": {
+    "hello": "こんにちは!",
+    "goodbye": "さようなら!"
+  }
+}
+```
+
+## Options
+
+```json
+{
+  "@intlify/vue-i18n/no-missing-keys-in-other-locales": ["error",
+    {
+      "ignoreLocales": []
+    }
+  ]
+}
+```
+
+- `ignoreLocales`: If you specify an array of locales, that locale is allowed even if it is missing.

lib/rules.ts

@@ -3,6 +3,7 @@ import keyFormatStyle from './rules/key-format-style'
 import noDuplicateKeysInLocale from './rules/no-duplicate-keys-in-locale'
 import noDynamicKeys from './rules/no-dynamic-keys'
 import noHtmlMessages from './rules/no-html-messages'
+import noMissingKeysInOtherLocales from './rules/no-missing-keys-in-other-locales'
 import noMissingKeys from './rules/no-missing-keys'
 import noRawText from './rules/no-raw-text'
 import noUnusedKeys from './rules/no-unused-keys'
@@ -14,6 +15,7 @@ export = {
   'no-duplicate-keys-in-locale': noDuplicateKeysInLocale,
   'no-dynamic-keys': noDynamicKeys,
   'no-html-messages': noHtmlMessages,
+  'no-missing-keys-in-other-locales': noMissingKeysInOtherLocales,
   'no-missing-keys': noMissingKeys,
   'no-raw-text': noRawText,
   'no-unused-keys': noUnusedKeys,

lib/rules/no-duplicate-keys-in-locale.ts

@@ -23,7 +23,7 @@ interface DictData {
 
 interface PathStack {
   otherDictionaries: DictData[]
-  keyPath: string
+  keyPath: (string | number)[]
   locale: string | null
   node?: JSONAST.JSONNode | YAMLAST.YAMLNode
   upper?: PathStack
@@ -50,7 +50,7 @@ function create(context: RuleContext): RuleListener {
       return createInitLocalePathStack(locale, otherLocaleMessages)
     } else {
       return {
-        keyPath: '',
+        keyPath: [],
         locale: null,
         otherDictionaries: []
       }
@@ -61,7 +61,7 @@ function create(context: RuleContext): RuleListener {
     otherLocaleMessages: LocaleMessage[]
   ): PathStack {
     return {
-      keyPath: '',
+      keyPath: [],
       locale,
       otherDictionaries: otherLocaleMessages.map(lm => {
         return {
@@ -118,12 +118,13 @@ function create(context: RuleContext): RuleListener {
               source: dict.source
             }
           })
-        const keyPath = joinPath(pathStack.keyPath, key)
+        const keyPath = [...pathStack.keyPath, key]
+        const keyPathStr = joinPath(...keyPath)
         const nextOtherDictionaries: DictData[] = []
         for (const value of keyOtherValues) {
           if (typeof value.value === 'string') {
             context.report({
-              message: `duplicate key '${keyPath}' in '${
+              message: `duplicate key '${keyPathStr}' in '${
                 pathStack.locale
               }'. "${getMessageFilepath(
                 value.source.fullpath
@@ -141,7 +142,7 @@ function create(context: RuleContext): RuleListener {
         pushKey(
           existsKeyNodes[pathStack.locale] ||
             (existsKeyNodes[pathStack.locale] = {}),
-          keyPath,
+          keyPathStr,
           reportNode
         )