feat: add global specification watcher

src/commands/validate.ts

@@ -4,21 +4,29 @@ import Command from '../base';
 import { ValidationError } from '../errors/validation-error';
 import { load } from '../models/SpecificationFile';
 import { SpecificationFileNotFound } from '../errors/specification-file';
+import { specWatcher } from '../globals';
 
 export default class Validate extends Command {
   static description = 'validate asyncapi file';
 
   static flags = {
-    help: flags.help({ char: 'h' })
+    help: flags.help({ char: 'h' }),
+    watch: flags.boolean({
+      char: 'w',
+      description: 'Enables Watch Mode for Specification File',
+    })
   }
 
   static args = [
     { name: 'spec-file', description: 'spec path, url, or context-name', required: false },
   ]
 
   async run() {
-    const { args } = this.parse(Validate);
+    const { args, flags } = this.parse(Validate);
     const filePath = args['spec-file'];
+
+    const watchMode = flags['watch'];
+
     let specFile;
 
     try {
@@ -35,6 +43,7 @@ export default class Validate extends Command {
     }
     try {
       if (specFile.getFilePath()) {
+        if (watchMode) {specWatcher(specFile.getFilePath() as string,this,'validate');}
         await parser.parse(specFile.text());
         this.log(`File ${specFile.getFilePath()} successfully validated!`);
       } else if (specFile.getFileURL()) {

src/globals.ts

@@ -0,0 +1,27 @@
+import chokidar from 'chokidar';
+import chalk from 'chalk';
+
+const GreenLog = chalk.hex('#00FF00');
+const OrangeLog = chalk.hex('#FFA500');
+
+export const specWatcher = (filePath: string, handler: any, handlerName: string) => {
+  const CHOKIDAR_CONFIG = {
+    awaitWriteFinish: true
+  };
+  const WATCH_MESSAGES = {
+    logOnStart: (filePath: string) => console.log(GreenLog(`Watching AsyncAPI SpecFile at ${filePath}`)),
+    logOnChange: (handlerName: string) => console.log(OrangeLog(`Changed: Specification, running ${handlerName}`)),
+  };
+
+  try {
+    WATCH_MESSAGES.logOnStart(filePath);
+    chokidar
+      .watch(filePath, CHOKIDAR_CONFIG)
+      .on('change', async () => {
+        WATCH_MESSAGES.logOnChange(handlerName);
+        await handler.run();
+      });
+  } catch (error) {
+    console.log(error);
+  }
+};

test/commands/validate.test.ts

@@ -2,7 +2,6 @@
 
 import * as path from 'path';
 import { expect, test } from '@oclif/test';
-
 import TestHelper from '../testHelper';
 
 const testHelper = new TestHelper();