feat: add error message for unsupported commands/package managers (#129)

Co-authored-by: Anthony Fu <[email protected]>

.gitignore

@@ -82,4 +82,4 @@ dist
 _storage.json
 
 # System files
-.DS_Store
+.DS_Store

src/parse.ts

@@ -3,6 +3,12 @@ import { AGENTS } from './agents'
 import { exclude } from './utils'
 import type { Runner } from './runner'
 
+export class UnsupportedCommand extends Error {
+  constructor({ agent, command }: { agent: Agent; command: Command }) {
+    super(`Command "${command}" is not support by agent "${agent}"`)
+  }
+}
+
 export function getCommand(
   agent: Agent,
   command: Command,
@@ -17,7 +23,8 @@ export function getCommand(
     return c(args)
 
   if (!c)
-    throw new Error(`Command "${command}" is not support by agent "${agent}"`)
+    throw new UnsupportedCommand({ agent, command })
+
   return c.replace('{0}', args.join(' ')).trim()
 }
 

src/runner.ts

@@ -10,6 +10,7 @@ import { getDefaultAgent, getGlobalAgent } from './config'
 import type { DetectOptions } from './detect'
 import { detect } from './detect'
 import { getVoltaPrefix, remove } from './utils'
+import { UnsupportedCommand } from './parse'
 
 const DEBUG_SIGN = '?'
 
@@ -26,6 +27,9 @@ export async function runCli(fn: Runner, options: DetectOptions = {}) {
     await run(fn, args, options)
   }
   catch (error) {
+    if (error instanceof UnsupportedCommand)
+      console.log(c.red(`\u2717 ${error.message}`))
+
     process.exit(1)
   }
 }