根据app.json是否配置oak-message， pages下xml自动加上 <oak-message />

config/loaders/wxml-loader.js

@@ -77,6 +77,7 @@ function traverse(doc, callback) {
 const isSrc = (name) => name === 'src';
 
 const isDynamicSrc = (src) => /\{\{/.test(src);
+const oakMessage = 'oak-message';
 const oakRegex = /(\/*[a-zA-Z0-9_-])*\/app\/|(\\*[a-zA-Z0-9_-])*\\app\\/;
 const localRegex = /(\/*[a-zA-Z0-9_-])*\/src+\/|(\\*[a-zA-Z0-9_-])*\\src+\\/;
 const TranslationFunction = 't';
@@ -117,6 +118,15 @@ function getWxsCode() {
     return [code, runner].join('\n');
 }
 
+function getAppJson(context) {
+    const JSON_PATH = require.resolve(`${context}/app.json`);
+    if (!fs.existsSync(JSON_PATH)) {
+        return;
+    }
+    const data = fs.readFileSync(JSON_PATH, 'utf8');
+    return JSON.parse(data);
+}
+
 module.exports = async function (content) {
     // loader的缓存功能
     // this.cacheable && this.cacheable();
@@ -175,9 +185,16 @@ module.exports = async function (content) {
     }
     // 注入全局message组件
     if (/pages/.test(context)) {
-        source =
-            source +
-            `<message show="{{!!oakError}}" type="{{oakError.type || ''}}" content="{{oakError.msg || ''}}" />`;
+        const appJson = getAppJson(projectContext);
+        if (
+            appJson &&
+            appJson.usingComponents &&
+            appJson.usingComponents[oakMessage]
+        ) {
+            source =
+                source +
+                `\n <${oakMessage} show="{{!!oakError}}" type="{{oakError.type || ''}}" content="{{oakError.msg || ''}}" ></${oakMessage}>`;
+        }
     }
 
     const doc = new DOMParser({