Add tsconfig to non monorepo plugin.

packages/cli/src/commands/plugin/diff.ts

@@ -40,17 +40,13 @@ const fileHandlers = [
     patterns: ['package.json'],
     handler: handlers.packageJson,
   },
-  {
-    patterns: ['tsconfig.json'],
-    handler: handlers.exactMatch,
-  },
   {
     // make sure files in 1st level of src/ and dev/ exist
     patterns: ['.eslintrc.js', /^(src|dev)\/[^/]+$/],
     handler: handlers.exists,
   },
   {
-    patterns: ['README.md', /^src\//],
+    patterns: ['README.md', 'tsconfig.json', /^src\//],
     handler: handlers.skip,
   },
 ];

packages/cli/src/lib/tasks.ts

@@ -20,6 +20,7 @@ import handlebars from 'handlebars';
 import ora from 'ora';
 import { basename, dirname } from 'path';
 import recursive from 'recursive-readdir';
+import { paths } from './paths';
 
 const TASK_NAME_MAX_LENGTH = 14;
 
@@ -72,6 +73,7 @@ export async function templatingTask(
   const files = await recursive(templateDir).catch(error => {
     throw new Error(`Failed to read template directory: ${error.message}`);
   });
+  const isMonoRepo = await fs.pathExists(paths.resolveTargetRoot('lerna.json'));
 
   for (const file of files) {
     const destinationFile = file.replace(templateDir, destinationDir);
@@ -92,6 +94,10 @@ export async function templatingTask(
         });
       });
     } else {
+      if (isMonoRepo && file.match('tsconfig.json')) {
+        continue;
+      }
+
       await Task.forItem('copying', basename(file), async () => {
         await fs.copyFile(file, destinationFile).catch(error => {
           const destination = destinationFile;

packages/cli/templates/default-plugin/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "extends": "@backstage/cli/config/tsconfig.json",
+  "include": [
+    "src",
+    "dev",
+    "migrations"
+  ],
+  "exclude": ["node_modules"],
+  "compilerOptions": {
+    "outDir": "dist-types",
+    "rootDir": "."
+  }
+}