Made studio command consistent

asyncapi.yml

@@ -0,0 +1,9 @@
+asyncapi: '3.0.0'
+info:
+  title: Welcome to AsyncAPI Studio
+  version: '1.0.0'
+  description: This is a sample AsyncAPI document to help you get started. Define your async APIs, channels, messages, and bindings here.
+  contact:
+    name: AsyncAPI 
+    url: https://www.asyncapi.com
+    email: [email protected]

docs/usage.md

@@ -786,10 +786,12 @@ starts a new local instance of Studio
 
 ```
 USAGE
-  $ asyncapi start studio [-h] [-f <value>] [-p <value>]
+  $ asyncapi start studio [SPEC_FILE] [-h] [-p <value>]
+
+ARGUMENTS
+  SPEC-FILE  spec path, url, or context-name
 
 FLAGS
-  -f, --file=<value>  path to the AsyncAPI file to link with Studio
   -h, --help          Show CLI help.
   -p, --port=<value>  port in which to start Studio
 

src/commands/start/studio.ts

@@ -2,16 +2,25 @@ import Command from '../../core/base';
 import { start as startStudio } from '../../core/models/Studio';
 import { load } from '../../core/models/SpecificationFile';
 import { studioFlags } from '../../core/flags/start/studio.flags';
+import { Args } from '@oclif/core';
 
 export default class StartStudio extends Command {
   static description = 'starts a new local instance of Studio';
 
   static flags = studioFlags();
 
+  static readonly args = {
+    'spec-file': Args.string({description: 'spec path, url, or context-name', required: false}),
+  };
+
   async run() {
-    const { flags } = await this.parse(StartStudio);
-    const filePath = flags.file || (await load()).getFilePath();
+    const { args, flags } = await this.parse(StartStudio);
+    const filePath = args['spec-file'] || (await load()).getFilePath();
     const port = flags.port;
+
+    if (!args['spec-file']) {
+      this.log('\nTo open a specific AsyncAPI file in the Studio, use: asyncapi start studio [your-spec-file-location]\n\n');
+    }
 
     this.specFile = await load(filePath);
     this.metricsMetadata.port = port;

src/core/flags/start/studio.flags.ts

@@ -3,7 +3,6 @@ import { Flags } from '@oclif/core';
 export const studioFlags = () => {
   return {
     help: Flags.help({ char: 'h' }),
-    file: Flags.string({ char: 'f', description: 'path to the AsyncAPI file to link with Studio' }),
     port: Flags.integer({ char: 'p', description: 'port in which to start Studio' }),
   };
 };