Toolkit: Add --coverage flag to plugin build command (#27743)

* Add --coverage option to build script

* Update README

packages/grafana-toolkit/README.md

@@ -100,6 +100,10 @@ Available options:
 
 This command creates a production-ready build of your plugin.
 
+Available options:
+
+- `--coverage` - Reports code coverage after the test step of the build.
+
 ## FAQ
 
 ### Which version of grafana-toolkit should I use?

packages/grafana-toolkit/src/cli/index.ts

@@ -139,8 +139,9 @@ export const run = (includeInternalScripts = false) => {
   program
     .command('plugin:build')
     .description('Prepares plugin dist package')
+    .option('--coverage', 'Run code coverage', false)
     .action(async cmd => {
-      await execTask(pluginBuildTask)({ coverage: false, silent: true });
+      await execTask(pluginBuildTask)({ coverage: cmd.coverage, silent: true });
     });
 
   program