fix(plugin-manifest): Allow for all valid WebAppManifest properties

packages/gatsby-plugin-manifest/README.md

@@ -446,6 +446,12 @@ manifest — https://developers.google.com/web/fundamentals/engage-and-retain/we
 
 For more information, see the [W3C specification](https://www.w3.org/TR/appmanifest/), [Mozilla documentation](https://developer.mozilla.org/en-US/docs/Web/Manifest) or [Web.Dev guide](https://web.dev/add-manifest/).
 
+### Plugin options validation
+
+This plugin validates plugin options set in the `gatsby-config.js`. It validates the options used by the plugin and the entire WebAppManifest spec. To see the exact implementation of the validator see [src/pluginOptionsSchema.js](src/pluginOptionsSchema.js).
+
+The WebAppManifest spec is not stable at the time of writing. This version of the validator adheres the [most recent](https://www.w3.org/TR/2020/WD-appmanifest-20201019/) version of the specification available.
+
 ## Troubleshooting
 
 ### Incompatible library version: sharp.node requires version X or later, but Z provides version Y

packages/gatsby-plugin-manifest/package.json

@@ -32,7 +32,7 @@
   "license": "MIT",
   "main": "index.js",
   "peerDependencies": {
-    "gatsby": "^2.4.0"
+    "gatsby": "^2.25.0"
   },
   "repository": {
     "type": "git",
@@ -47,4 +47,4 @@
   "engines": {
     "node": ">=10.13.0"
   }
-}
+}

packages/gatsby-plugin-manifest/src/gatsby-node.js

@@ -9,6 +9,8 @@ import {
   favicons,
 } from "./common"
 
+import pluginOptionsSchema from "./pluginOptionsSchema"
+
 sharp.simd(true)
 
 // Handle Sharp's concurrency based on the Gatsby CPU count
@@ -58,43 +60,7 @@ async function checkCache(cache, icon, srcIcon, srcIconDigest, callback) {
   }
 }
 
-exports.pluginOptionsSchema = ({ Joi }) =>
-  Joi.object({
-    name: Joi.string(),
-    short_name: Joi.string(),
-    description: Joi.string(),
-    lang: Joi.string(),
-    localize: Joi.array().items(
-      Joi.object({
-        start_url: Joi.string(),
-        name: Joi.string(),
-        short_name: Joi.string(),
-        description: Joi.string(),
-        lang: Joi.string(),
-      })
-    ),
-    start_url: Joi.string(),
-    background_color: Joi.string(),
-    theme_color: Joi.string(),
-    display: Joi.string(),
-    legacy: Joi.boolean(),
-    include_favicon: Joi.boolean(),
-    icon: Joi.string(),
-    theme_color_in_head: Joi.boolean(),
-    crossOrigin: Joi.string().valid(`use-credentials`, `anonymous`),
-    cache_busting_mode: Joi.string().valid(`query`, `name`, `none`),
-    icons: Joi.array().items(
-      Joi.object({
-        src: Joi.string(),
-        sizes: Joi.string(),
-        type: Joi.string(),
-        purpose: Joi.string(),
-      })
-    ),
-    icon_options: Joi.object({
-      purpose: Joi.string(),
-    }),
-  })
+exports.pluginOptionsSchema = pluginOptionsSchema
 
 /**
  * Setup pluginOption defaults

packages/gatsby-plugin-manifest/src/pluginOptionsSchema.js

@@ -0,0 +1,236 @@
+export default function pluginOptionSchema({ Joi }) {
+  /* Descriptions copied from or based on documentation at https://developer.mozilla.org/en-US/docs/Web/Manifest
+   *
+   * Currently based on https://www.w3.org/TR/2020/WD-appmanifest-20201019/
+   */
+
+  const platform = Joi.string()
+    .optional()
+    .empty(``)
+    .description(`The platform on which the application can be found.`)
+
+  const FingerPrint = Joi.object().keys({
+    type: Joi.string()
+      .required()
+      .description(`syntax and semantics are platform-defined`),
+    value: Joi.string()
+      .required()
+      .description(`syntax and semantics are platform-defined`),
+  })
+
+  const ManifestImageResource = Joi.object().keys({
+    sizes: Joi.string()
+      .optional()
+      .description(`A string containing space-separated image dimensions`),
+    src: Joi.string()
+      .required()
+      .description(
+        `The path to the image file. If src is a relative URL, the base URL will be the URL of the manifest.`
+      ),
+    type: Joi.string().description(
+      `A hint as to the media type of the image. The purpose of this member is to allow a user agent to quickly ignore images with media types it does not support.`
+    ),
+    purpose: Joi.string()
+      .optional()
+      .description(
+        `Defines the purpose of the image, for example if the image is intended to serve some special purpose in the context of the host OS.`
+      ),
+  })
+
+  const ShortcutItem = Joi.object().keys({
+    name: Joi.string()
+      .required()
+      .description(
+        `The name member of a ShortcutItem is a string that represents the name of the shortcut as it is usually displayed to the user in a context menu. `
+      ),
+    short_name: Joi.string()
+      .optional()
+      .description(
+        `The short_name member of a ShortcutItem is a string that represents a short version of the name of the shortcut. `
+      ),
+    description: Joi.string()
+      .optional()
+      .description(
+        `The description member of a ShortcutItem is a string that allows the developer to describe the purpose of the shortcut. `
+      ),
+    url: Joi.string()
+      .required()
+      .description(
+        `The url member of a ShortcutItem is a URL within scope of a processed manifest that opens when the associated shortcut is activated. `
+      ),
+    icons: Joi.array()
+      .optional()
+      .items(ManifestImageResource)
+      .description(
+        `The icons member of an ShortcutItem member serve as iconic representations of the shortcut in various contexts. `
+      ),
+  })
+
+  const ExternalApplicationResource = Joi.object()
+    .keys({
+      platform: platform.required(),
+      url: Joi.string()
+        .uri()
+        .required()
+        .description(`The URL at which the application can be found.`),
+      id: Joi.string()
+        .required()
+        .description(
+          `The ID used to represent the application on the specified platform.`
+        ),
+      min_version: Joi.string()
+        .optional()
+        .description(
+          `The minimum version of the application that is considered related to this web app.`
+        ),
+      fingerprints: Joi.array()
+        .optional()
+        .items(FingerPrint)
+        .description(
+          `Each Fingerprints represents a set of cryptographic fingerprints used for verifying the application.`
+        ),
+    })
+    .or("url", "id")
+
+  const WebAppManifest = Joi.object().keys({
+    background_color: Joi.string()
+      .optional()
+      .description(
+        `The background_color member defines a placeholder background color for the application page to display before its stylesheet is loaded.`
+      ),
+    categories: Joi.array()
+      .items(Joi.string().empty(``))
+      .optional()
+      .description(
+        `The categories member is an array of strings defining the names of categories that the application supposedly belongs to.`
+      ),
+    description: Joi.string()
+      .optional()
+      .description(
+        `The description member is a string in which developers can explain what the application does. `
+      ),
+    dir: Joi.string()
+      .optional()
+      .valid(`auto`, `ltr`, `rtl`)
+      .description(
+        `The base direction in which to display direction-capable members of the manifest.`
+      ),
+    display: Joi.string()
+      .optional()
+      .valid(`fullscreen`, `standalone`, `minimal-ui`, `browser`)
+      .description(
+        `The display member is a string that determines the developers’ preferred display mode for the website`
+      ),
+    iarc_rating_id: Joi.string()
+      .guid()
+      .optional()
+      .description(
+        `The iarc_rating_id member is a string that represents the International Age Rating Coalition (IARC) certification code of the web application.`
+      ),
+    icons: Joi.array()
+      .optional()
+      .items(ManifestImageResource)
+      .description(
+        `The icons member specifies an array of objects representing image files that can serve as application icons for different contexts.`
+      ),
+    lang: Joi.string()
+      .optional()
+      .description(
+        `The lang member is a string containing a single language tag.`
+      ),
+    name: Joi.string()
+      .optional()
+      .description(
+        `The name member is a string that represents the name of the web application as it is usually displayed to the user.`
+      ),
+    orientation: Joi.string()
+      .optional()
+      .valid(
+        `any`,
+        `natural`,
+        `landscape`,
+        `landscape-primary`,
+        `landscape-secondary`,
+        `portrait`,
+        `portrait-primary`,
+        `portrait-secondary`
+      ) // From: https://www.w3.org/TR/screen-orientation/#screenorientation-interface
+      .description(
+        `The orientation member defines the default orientation for all the website's top-level browsing contexts`
+      ),
+    prefer_related_applications: Joi.boolean()
+      .optional()
+      .description(
+        `The prefer_related_applications member is a boolean value that specifies that applications listed in related_applications should be preferred over the web application.`
+      ),
+    related_applications: Joi.array()
+      .optional()
+      .items(ExternalApplicationResource)
+      .description(
+        `The related_applications field is an array of objects specifying native applications that are installable by, or accessible to, the underlying platform.`
+      ),
+    scope: Joi.string()
+      .optional()
+      .description(
+        `The scope member is a string that defines the navigation scope of this web application's application context.`
+      ),
+    screenshots: Joi.array()
+      .optional()
+      .items(ManifestImageResource)
+      .description(
+        `The screenshots member defines an array of screenshots intended to showcase the application.`
+      ),
+    short_name: Joi.string()
+      .optional()
+      .description(
+        `The short_name member is a string that represents the name of the web application displayed to the user if there is not enough space to display name.`
+      ),
+    shortcuts: Joi.array()
+      .optional()
+      .items(ShortcutItem)
+      .description(
+        `Each ShortcutItem represents a link to a key task or page within a web app. `
+      ),
+    start_url: Joi.string()
+      .optional()
+      .description(
+        `The start_url member is a string that represents the start URL of the web application.`
+      ),
+    theme_color: Joi.string()
+      .optional()
+      .description(
+        `The theme_color member is a string that defines the default theme color for the application.`
+      ),
+  })
+
+  const GatsbyPluginOptions = Joi.object()
+    .keys({
+      icon: Joi.string(),
+      legacy: Joi.boolean().default(true),
+      theme_color_in_head: Joi.boolean().default(true),
+      cache_busting_mode: Joi.string()
+        .valid(`none`, `query`, `name`)
+        .default("query"),
+      crossOrigin: Joi.string()
+        .valid(`anonymous`, `use-credentials`)
+        .default("anonymous"),
+      include_favicon: Joi.boolean().default(true),
+      icon_options: ManifestImageResource.keys({
+        src: Joi.string().forbidden(),
+        sizes: Joi.string().forbidden(),
+      }),
+
+      localize: Joi.array()
+        .items(
+          WebAppManifest.keys({
+            lang: Joi.required(),
+            start_url: Joi.required(),
+          })
+        )
+        .description(`Used for localizing your WebAppManifest`),
+    })
+    .or(`icon`, `icons`)
+    .with(`localize`, `lang`)
+
+  return WebAppManifest.concat(GatsbyPluginOptions)
+}