feat: write to stdout or file

Makefile

@@ -119,4 +119,14 @@ run-rules: ## validate the rules directory
 	do \
 		echo "Validating $${file}..."; \
 		node out/bundle.js --rules $(ROOT_PATH)/rules/salty-dog.yml --source $${file} --tag important; \
-	done
+	done
+
+run-stream: ## validate stdin and write it to stdout, errors to stderr
+	@node out/bundle.js \
+		--config-path $(ROOT_PATH)/docs --config-name config-stderr.yml \
+		--dest - \
+		--format yaml \
+		--rules $(ROOT_PATH)/rules/kubernetes.yml \
+		--source - \
+		--tag important \
+		--tag optional

config/rollup.js

@@ -37,7 +37,14 @@ export default {
 			namedExports: {
 				'node_modules/lodash/lodash.js': ['intersection', 'isNil', 'isString'],
 				'node_modules/noicejs/out/main-bundle.js': ['BaseError'],
-				'node_modules/js-yaml/index.js': ['DEFAULT_SAFE_SCHEMA', 'SAFE_SCHEMA', 'safeLoad', 'Schema', 'Type'],
+				'node_modules/js-yaml/index.js': [
+					'DEFAULT_SAFE_SCHEMA',
+					'SAFE_SCHEMA',
+					'safeDump',
+					'safeLoad',
+					'Schema',
+					'Type',
+				],
 				'node_modules/yargs-parser/index.js': ['detailed'],
 			},
 		}),

src/index.ts

@@ -1,11 +1,11 @@
 import { createLogger } from 'bunyan';
+import { safeDump, safeLoad } from 'js-yaml';
 import { detailed, Options } from 'yargs-parser';
 
-import { loadConfig, CONFIG_SCHEMA } from 'src/config';
-import { loadRules, resolveRules, checkRule } from 'src/rule';
-import { loadSource } from 'src/source';
+import { CONFIG_SCHEMA, loadConfig } from 'src/config';
+import { checkRule, loadRules, resolveRules } from 'src/rule';
+import { loadSource, writeSource } from 'src/source';
 import { VERSION_INFO } from 'src/version';
-import { safeLoad } from 'js-yaml';
 
 const CONFIG_ARGS_NAME = 'config-name';
 const CONFIG_ARGS_PATH = 'config-path';
@@ -13,8 +13,11 @@ const CONFIG_ARGS_PATH = 'config-path';
 const MAIN_ARGS: Options = {
   alias: {
     'count': ['c'],
+    'dest': ['d'],
+    'format': ['f'],
     'includeTag': ['t', 'tag'],
     'mode': ['m'],
+    'source': ['s'],
   },
   array: [
     CONFIG_ARGS_PATH,
@@ -34,9 +37,11 @@ const MAIN_ARGS: Options = {
     [CONFIG_ARGS_NAME]: `.${VERSION_INFO.app.name}.yml`,
     [CONFIG_ARGS_PATH]: [],
     'count': false,
+    'dest': '-',
     'excludeLevel': [],
     'excludeName': [],
     'excludeTag': [],
+    'format': 'yaml',
     'includeLevel': [],
     'includeName': [],
     'includeTag': [],
@@ -45,7 +50,9 @@ const MAIN_ARGS: Options = {
     'source': '-',
   },
   envPrefix: VERSION_INFO.app.name,
-  string: ['mode'],
+  string: [
+    'mode',
+  ],
 };
 
 const STATUS_SUCCESS = 0;
@@ -100,6 +107,10 @@ export async function main(argv: Array<string>): Promise<number> {
     }
   } else {
     logger.info('all rules passed');
+    const output = safeDump(data, {
+      schema: CONFIG_SCHEMA,
+    });
+    await writeSource(args.argv.dest, output);
     return STATUS_SUCCESS;
   }
 }

src/source.ts

@@ -1,7 +1,8 @@
 import { promisify } from 'util';
-import { readFile } from 'fs';
+import { readFile, writeFile } from 'fs';
 
 const readFileSync = promisify(readFile);
+const writeFileSync = promisify(writeFile);
 
 export async function loadSource(path: string): Promise<string> {
   if (path === '-') {
@@ -10,3 +11,13 @@ export async function loadSource(path: string): Promise<string> {
     return readFileSync(path, 'utf-8');
   }
 }
+
+export async function writeSource(path: string, data: string): Promise<void> {
+  if (path === '-') {
+    process.stdout.write(data);
+  } else {
+    return writeFileSync(path, data, {
+      encoding: 'utf-8',
+    });
+  }
+}