save settings to pac (cocos#14917)

editor/inspector/assets/texture/auto-atlas.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const texture = require('./texture');
+const { readFileSync, writeFileSync } = require('fs');
 
 exports.template = texture.template;
 
@@ -10,7 +11,27 @@ exports.$ = texture.$;
 
 const Elements = texture.Elements;
 
-exports.methods = texture.methods;
+exports.methods = Object.assign({}, texture.methods, {
+    // before save meta
+    apply() {
+        const file = this.asset.file;
+        if (file) {
+            try {
+                const pacData = JSON.parse(readFileSync(file, 'utf8'));
+                Object.assign(pacData, {
+                    ver: this.meta.ver,
+                    importer: this.meta.importer,
+                    userData: this.meta.userData,
+                });
+                writeFileSync(file, JSON.stringify(pacData, null, 2), 'utf8');
+            } catch (error) {
+                console.error('Failed to save auto atlas settings!');
+                return false;
+            }
+        }
+        return;
+    }
+});
 
 exports.ready = texture.ready;