vuejs · aweikalee · Nov 18, 2018 · Mar 26, 2019
diff --git a/packages/@vue/cli-plugin-pwa/README.md b/packages/@vue/cli-plugin-pwa/README.md
@@ -54,7 +54,7 @@ file, or the `"vue"` field in `package.json`.
   - Default: `'default'`
 
 - **pwa.assetsVersion**
-  
+
   - Default: `''`
 
     This option is used if you need to add a version to your icons and manifest, against browser’s cache. This will append `?v=<pwa.assetsVersion>` to the URLs of the icons and manifest.
@@ -65,6 +65,35 @@ file, or the `"vue"` field in `package.json`.
 
     The path of app’s manifest.
 
+- **pwa.manifestOptions**
+
+  - Default: `{}`
+
+    The object will be used to generate the `manifest.json`
+
+    If the following attributes are not defined in the object, the options of `pwa` or default options will be used instead.
+      - name: `pwa.name`
+      - short_name: `pwa.name`
+      - icons:
+        ```js
+        [
+          {
+            src: './img/icons/android-chrome-192x192.png',
+            sizes: '192x192',
+            type: 'image/png'
+          },
+          {
+            src: './img/icons/android-chrome-512x512.png',
+            sizes: '512x512',
+            type: 'image/png'
+          }
+        ]
+        ```
+      - start_url: `'./index.html'`
+      - display: `'standalone'`
+      - background_color: `'#000000'`
+      - theme_color: `pwa.themeColor`
+
 - **pwa.iconPaths**
 
   - Defaults:

diff --git a/packages/@vue/cli-plugin-pwa/__tests__/pwaPlugin.spec.js b/packages/@vue/cli-plugin-pwa/__tests__/pwaPlugin.spec.js
@@ -26,6 +26,28 @@ test('pwa', async () => {
   expect(project.has('dist/manifest.json')).toBe(true)
   expect(project.has('dist/img/icons/android-chrome-512x512.png')).toBe(true)
 
+  const manifest = await project.read('dist/manifest.json')
+  expect(JSON.parse(manifest)).toEqual({
+    name: 'pwa-build',
+    short_name: 'pwa-build',
+    theme_color: '#4DBA87',
+    icons: [
+      {
+        src: './img/icons/android-chrome-192x192.png',
+        sizes: '192x192',
+        type: 'image/png'
+      },
+      {
+        src: './img/icons/android-chrome-512x512.png',
+        sizes: '512x512',
+        type: 'image/png'
+      }
+    ],
+    start_url: './index.html',
+    display: 'standalone',
+    background_color: '#000000'
+  })
+
   // Make sure the base preload/prefetch are not affected
   const index = await project.read('dist/index.html')
 

diff --git a/packages/@vue/cli-plugin-pwa/generator/template/public/manifest.json b/packages/@vue/cli-plugin-pwa/generator/template/public/manifest.json
diff --git a/packages/@vue/cli-plugin-pwa/index.js b/packages/@vue/cli-plugin-pwa/index.js
@@ -6,14 +6,16 @@ module.exports = (api, options) => {
     }
 
     const name = api.service.pkg.name
+    const assetsPublic = api.resolve('public')
     const userOptions = options.pwa || {}
 
     // the pwa plugin hooks on to html-webpack-plugin
     // and injects icons, manifest links & other PWA related tags into <head>
     webpackConfig
       .plugin('pwa')
         .use(require('./lib/HtmlPwaPlugin'), [Object.assign({
-          name
+          name,
+          assetsPublic
         }, userOptions)])
         .after('html')
 

diff --git a/packages/@vue/cli-plugin-pwa/lib/HtmlPwaPlugin.js b/packages/@vue/cli-plugin-pwa/lib/HtmlPwaPlugin.js
@@ -7,7 +7,26 @@ const defaults = {
   appleMobileWebAppCapable: 'no',
   appleMobileWebAppStatusBarStyle: 'default',
   assetsVersion: '',
-  manifestPath: 'manifest.json'
+  manifestPath: 'manifest.json',
+  manifestOptions: {}
+}
+
+const defaultManifest = {
+  icons: [
+    {
+      "src": "./img/icons/android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "./img/icons/android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  start_url: './index.html',
+  display: 'standalone',
+  background_color: "#000000"
 }
 
 const defaultIconPaths = {
@@ -109,6 +128,62 @@ module.exports = class HtmlPwaPlugin {
 
         cb(null, data)
       })
+
+
+    })
+
+    // generated manifest.json
+    compiler.hooks.emit.tapAsync(ID, (data, cb) => {
+      const {
+        name,
+        assetsPublic,
+        themeColor,
+        manifestPath,
+        manifestOptions
+      } = this.options
+
+      const publicOptions = {
+        name,
+        short_name: name,
+        theme_color: themeColor
+      }
+
+      const manifestFilePath = path.resolve(assetsPublic, manifestPath)
+      let fileManifest
+      try {
+        fileManifest = JSON.parse(
+          fs.readFileSync(manifestFilePath).toString()
+        )
+
+        // Check the generated manifest.json (without file) is identical to the existing one
+        const nofileManifest = Object.assign(publicOptions, defaultManifest, manifestOptions)
+        const isIdentical = !Object.keys(fileManifest).find((key) => {
+          return (
+            JSON.stringify(fileManifest[key]) !==
+            JSON.stringify(nofileManifest[key])
+          )
+        })
+
+        // Throw info or warn
+        setTimeout(() => {
+          if (isIdentical) {
+            info(`You can safely delete the manifest.json redundant file.\nFile Path: ${manifestFilePath}`)
+          } else {
+            warn(`Recommend: Use pwa.manifestOptions instead of ${manifestFilePath}`)
+          }
+        }, 1000)
+      } catch (err) {
+        fileManifest = {}
+      }
+
+      const outputManifest = JSON.stringify(
+        Object.assign(publicOptions, defaultManifest, fileManifest, manifestOptions)
+      )
+      data.assets[manifestPath] = {
+        source: () => outputManifest,
+        size: () => outputManifest.length
+      }
+      cb(null, data)
     })
   }
 }