feat(plugin api): task match can now be a function

Author: Guillaume Chau

docs/dev-guide/ui-api.md

@@ -350,6 +350,14 @@ api.describeTask({
 })
 ```
 
+You can also use a function for `match`:
+
+```js
+api.describeTask({
+  match: (command) => /vue-cli-service serve/.test(command),
+})
+```
+
 ### Task icon
 
 It can be either a [Material icon](https://material.io/tools/icons) code or a custom image (see [Public static files](#public-static-files)):

packages/@vue/cli-ui/apollo-server/api/PluginApi.js

@@ -191,7 +191,7 @@ class PluginApi {
    */
   getDescribedTask (command) {
     return this.describedTasks.find(
-      options => options.match.test(command)
+      options => typeof options.match === 'function' ? options.match(command) : options.match.test(command)
     )
   }
 

packages/@vue/cli-ui/apollo-server/api/task.js

@@ -18,7 +18,7 @@ const schema = joi => ({
 })
 
 const describeSchema = createSchema(joi => ({
-  match: joi.object().type(RegExp).required().description('Match a npm script command'),
+  match: joi.alternatives().try(joi.object().type(RegExp), joi.func()).required().description('Match a npm script command'),
   ...schema(joi)
 }))