fix: automatically detect mime types

Author: Loïc Mangeonjean

package-lock.json

@@ -147,6 +147,7 @@
     "fast-glob": "^3.3.1",
     "js-cleanup": "^1.2.0",
     "jschardet": "^3.0.0",
+    "mime-types": "^2.1.35",
     "patch-package": "^7.0.2",
     "recast": "^0.23.3",
     "rollup": "^3.26.3",

package.json

@@ -11,6 +11,7 @@ import { addExtension } from '@rollup/pluginutils'
 import { IUserFriendlyViewsContainerDescriptor } from 'vs/workbench/api/browser/viewsExtensionPoint'
 // @ts-ignore
 import parseCssUrl from 'css-url-parser'
+import * as mime from 'mime-types'
 import * as path from 'path'
 
 export interface ExtensionResource {
@@ -170,7 +171,7 @@ async function extractResourcesFromExtensionManifestContribute (contribute: Real
 }
 
 export async function extractResourcesFromExtensionManifest (manifest: IExtensionManifest, getFileContent: (path: string) => Promise<Buffer>): Promise<ExtensionResource[]> {
-  const resources: ExtensionResource[] = []
+  let resources: ExtensionResource[] = []
 
   if (manifest.contributes != null) {
     resources.push(...await extractResourcesFromExtensionManifestContribute(manifest.contributes as RealContribute, getFileContent))
@@ -181,6 +182,19 @@ export async function extractResourcesFromExtensionManifest (manifest: IExtensio
     resources.push(...(await extractResources(jsPath, getFileContent)))
   }
 
+  resources = resources.map(r => {
+    if (r.mimeType == null) {
+      const detectedType = mime.lookup(r.path)
+      if (detectedType !== false) {
+        return {
+          ...r,
+          mimeType: detectedType
+        }
+      }
+    }
+    return r
+  })
+
   // remove duplicates
   return Object.values(Object.fromEntries(resources.map(r => [r.path, r])))
 }