refactor: improving handleError utility method

src/utils/handleError.ts

@@ -7,25 +7,45 @@
 * file that was distributed with this source code.
 */
 
-import { red, bgRed } from 'kleur'
+import { Colors } from '@poppinss/colors'
+import logger from '@poppinss/fancy-logs'
+import { CommandConstructorContract } from '../Contracts'
+import { InvalidFlagType } from '../Exceptions/InvalidFlagType'
+import { MissingCommandArgument } from '../Exceptions/MissingCommandArgument'
+
+const colors = new Colors()
+
+/**
+ * Prints additional help for a given command
+ */
+function printAdditionalHelp (command?: CommandConstructorContract) {
+  if (!command) {
+    return
+  }
+
+  const commandHelp = colors.yellow(`adonis ${command.commandName} --help`)
+  const message = `Consult the command help by typing ${commandHelp}`
+  console.log(`            ${message}`)
+}
 
 /**
  * Handles the command errors and prints them to the console.
  */
 export function handleError (error: any) {
-  if (error.name === 'CommandValidationException') {
-    console.log(red(error.message))
-    console.log(bgRed('This is a programming error. Make sure to read the docs'))
+  if (error instanceof MissingCommandArgument) {
+    const { command, argumentName } = error
+    logger.error(`Missing argument {${argumentName}}`)
+    printAdditionalHelp(command)
     return
   }
 
-  if (error.name === 'InvalidArgumentException') {
-    console.log(bgRed('Error'))
-    console.log(red(error.message))
+  if (error instanceof InvalidFlagType) {
+    const { command, argumentName, exceptedType } = error
+    const message = `Expected {${argumentName}} to be a valid {${exceptedType}}`
+    logger.error(message)
+    printAdditionalHelp(command)
     return
   }
 
-  console.log(bgRed('Fatal error'))
-  console.log(red(error.message))
-  console.log(error.stack)
+  logger.fatal(error)
 }

src/utils/help.ts

@@ -21,6 +21,9 @@ function wrapArg (arg: CommandArg): string {
   return arg.required ? `<${displayName}>` : `[${displayName}]`
 }
 
+/**
+ * Returns an array of flags for displaying the help screen
+ */
 function getFlagsForDisplay (flags: CommandFlag[]) {
   return flags.map(({ name, type, alias, description }) => {
     /**
@@ -61,6 +64,9 @@ function getFlagsForDisplay (flags: CommandFlag[]) {
   })
 }
 
+/**
+ * Returns an array of args for displaying the help screen
+ */
 function getArgsForDisplay (args: CommandArg[]) {
   return args.map(({ name, description }) => {
     return {