fix(store): warn and skip when duplicate path detected

gridsome/lib/app/ContentTypeCollection.js

@@ -4,6 +4,7 @@ const camelCase = require('camelcase')
 const dateFormat = require('dateformat')
 const slugify = require('@sindresorhus/slugify')
 const { mapKeys, cloneDeep, deepMerge } = require('lodash')
+const { warn } = require('../utils/log')
 
 class ContentTypeCollection extends EventEmitter {
   constructor (store, pluginStore, options) {
@@ -41,8 +42,12 @@ class ContentTypeCollection extends EventEmitter {
       mimeTypes[mimeType] = this._pluginStore._transformers[mimeType]
     }
 
-    this.collection.insert(node)
-    this.emit('change', node)
+    try {
+      this.collection.insert(node)
+      this.emit('change', node)
+    } catch (err) {
+      warn(`Skipping duplicate path for ${node.path}`, this.typeName)
+    }
 
     return node
   }

gridsome/lib/utils/log.js

@@ -0,0 +1,21 @@
+const chalk = require('chalk')
+
+exports.log = function (message, tag) {
+  log('log', null, message, tag)
+}
+
+exports.warn = function (message, tag) {
+  log('warn', 'yellow', message, tag)
+}
+
+exports.error = function (message, tag) {
+  log('error', 'red', message, tag)
+}
+
+
+function log (type, color, message, tag) {
+  const formatted = color ? chalk[color](message) : message
+  const fn = console[type]
+
+  tag ? fn(tag, '>', formatted) : fn(format)
+}