fix: better warnings for missing $map functions

lib/utils/index.js

@@ -42,7 +42,22 @@ function deepAssign(target, ...sources) {
   return target
 }
 
-async function keysAsFunctionsRecursive(obj, suffix = '$map') {
+
+/** *
+ * @param {object} obj the config
+ * @param {string} suffix  defaults to '$map'
+ * recursively converts
+ * {
+ *   myPlugins: ['hello'],
+ *   myPlugins$map: { aPlugin: str => `${str}bar` },
+ *   myPlugins$options: { aPlugin: 'foo', _n: 123 }
+ * }
+ * to
+ * {
+ *   myPlugins: ['hello', 'foobar', 123]
+ * }
+ */
+async function keysAsFunctionsRecursive(obj, suffix = '$map', breadcrumbs = []) {
   const maps = []
 
   // process all descendants' maps first
@@ -51,7 +66,7 @@ async function keysAsFunctionsRecursive(obj, suffix = '$map') {
       if (mapKey.endsWith(suffix))
         maps.push({ mapKey, value })
       else
-        return keysAsFunctionsRecursive(value, suffix)
+        return keysAsFunctionsRecursive(value, suffix, [...breadcrumbs, mapKey])
     }
   })
   await Promise.all(children)
@@ -60,10 +75,13 @@ async function keysAsFunctionsRecursive(obj, suffix = '$map') {
   await Promise.all(maps.map(async ({ mapKey, value }) => {
     const key = mapKey.substr(0, mapKey.length - suffix.length)
     const optionsKey = `${key}$options`
-    const result = await keysAsFunctions(obj[optionsKey], value, key)
+    const result = await keysAsFunctions(obj[optionsKey], value, breadcrumbs)
     delete obj[mapKey]
     delete obj[optionsKey]
-    obj[key] = result
+
+    // make sure the array exists
+    obj[key] = obj[key] || []
+    obj[key].push(...result)
   }))
 
   return obj
@@ -78,7 +96,9 @@ async function keysAsFunctionsRecursive(obj, suffix = '$map') {
  * @param {object} obj
  * @param {Object.<string, function>} map
  */
-async function keysAsFunctions(obj, map, name) {
+async function keysAsFunctions(obj, map, breadcrumbs) {
+  const name = breadcrumbs.join('.')
+
   if (!isObject(obj))
     throw new Error(`expected an object for "${name}", but got ${JSON.stringify(obj, null, 2)}`)
   const { log } = require('./log')
@@ -87,11 +107,11 @@ async function keysAsFunctions(obj, map, name) {
     const fnName = key.split('.')[0]
     const fn = map[fnName]
 
-    if (!fn && isFn) log.info(
-      `there's no map method named ${key}. Available methods: ${Object.keys(map)}.` +
-      `\nRenaming to "_${key}" will hide this message.` +
-      `\nvalue: ${JSON.stringify(value, null, 2)}` +
-      `\nobj: ${JSON.stringify(obj, null, 2)}`
+    if (!fn && isFn) log.warn(
+      `--${name}$map-- does not have a method called --${key}--. Available methods: --${Object.keys(map)}--.` +
+      `\nRenaming to --${key}-- or pushing the value of --${key}-- to --${name}-- will hide this message.`
+      // `\nvalue: ${JSON.stringify(value, null, 2)}` +
+      // `\nobj: ${JSON.stringify(obj, null, 2)}`
     )
     return fn && value ? fn(value) : value
   })
@@ -135,20 +155,20 @@ function sortHooks(hooks) {
           || obstacleOrderings.find(order => order.before === pluginName)
         )
           return true
-    })
-
-    if (obstacle) {
-      obstacles.push({
-        plugin: hook.plugin.name,
-        obstacle: obstacle.plugin.name
       })
-    } else {
-      sortedHooks.push(hooks.splice(index, 1)[0])
-      break;
+
+      if (obstacle) {
+        obstacles.push({
+          plugin: hook.plugin.name,
+          obstacle: obstacle.plugin.name
+        })
+      } else {
+        sortedHooks.push(hooks.splice(index, 1)[0])
+        break;
+      }
     }
   }
-}
-return sortedHooks
+  return sortedHooks
 }