refactor: Extract rollup plugin

Author: CGNonofr

rollup.types.config.ts

@@ -1,6 +1,7 @@
 import * as rollup from 'rollup'
 import dts from 'rollup-plugin-dts'
 import pkg from './package.json'
+import removeVscodeDeclareModule from './rollup/rollup-plugin-remove-vscode-declare-module'
 
 const externals = [
   ...Object.keys(pkg.dependencies),
@@ -25,33 +26,7 @@ export default rollup.defineConfig({
     return externals.some(external => source.startsWith(external))
   },
   plugins: [
-    {
-      // Remove "declare module 'vscode'" from vscode type
-      // Or else dts plugin is unable to extract types from it
-      name: 'remove-vscode-declare-module',
-      transform: (code, id) => {
-        if (id.endsWith('@types/vscode/index.d.ts')) {
-          const lines = code.split('\n')
-          let index = lines.indexOf('declare module \'vscode\' {')
-          lines.splice(index, 1)
-          if (index >= 0) {
-            let end = false
-            while (!end) {
-              if (lines[index] === '}') {
-                lines.splice(index, 1)
-                end = true
-              } else {
-                // unindent
-                lines[index] = lines[index].slice(4)
-              }
-              index++
-            }
-          }
-          return lines.join('\n')
-        }
-        return code
-      }
-    },
+    removeVscodeDeclareModule(),
     dts({
       respectExternal: true
     })

rollup/rollup-plugin-remove-vscode-declare-module.ts

@@ -0,0 +1,34 @@
+import { PluginImpl } from 'rollup'
+
+const plugin: PluginImpl<{}> = () => {
+  return {
+    // Remove "declare module 'vscode'" from vscode type
+    // Or else dts plugin is unable to extract types from it
+    name: 'remove-vscode-declare-module',
+    transform (code, id) {
+      if (id.endsWith('@types/vscode/index.d.ts')) {
+        const lines = code.split('\n')
+        let index = lines.indexOf('declare module \'vscode\' {')
+        lines.splice(index, 1)
+        if (index >= 0) {
+          let end = false
+          while (!end) {
+            if (lines[index] === '}') {
+              lines.splice(index, 1)
+              end = true
+            } else {
+              // unindent
+              lines[index] = lines[index].slice(4)
+            }
+            index++
+          }
+        }
+        return lines.join('\n')
+      }
+      return code
+    }
+
+  }
+}
+
+export default plugin

tsconfig.json

@@ -23,7 +23,7 @@
     "sourceMap": true,
     "target": "es5"
   },
-  "include": ["src", "update-extensions.ts", "rollup.config.ts", "rollup.types.config.ts"],
+  "include": ["src", "rollup", "update-extensions.ts", "rollup.config.ts", "rollup.types.config.ts"],
   "exclude": [
     "dist",
     "node_modules"