feat: add JSON reporter (#33)

Author: bartveneman

src/cli/arguments.ts

@@ -10,6 +10,7 @@ const show_uncovered_options = {
 const reporters = {
 	pretty: 'pretty',
 	tap: 'tap',
+	json: 'json',
 } as const
 
 let CoverageDirSchema = v.pipe(v.string(), v.nonEmpty())

src/cli/cli.ts

@@ -24,6 +24,10 @@ async function cli(cli_args: string[]) {
 	if (params.reporter === 'tap') {
 		return tap(report, params)
 	}
+	if (params.reporter === 'json') {
+		// oxlint-disable-next-line no-null
+		return console.log(JSON.stringify(report))
+	}
 	return pretty(report, params)
 }