Change default handler to use pretty printer

src/handle.ts

@@ -1,21 +1,28 @@
 /* eslint-disable no-process-exit */
 /* eslint-disable unicorn/no-process-exit */
-
-import clean = require('clean-stack')
-
 import {config} from './config'
+import prettyPrint, {PrettyPrintableError} from './errors/pretty-print'
+import {CLIError, ExitError} from '.'
+import clean = require('clean-stack')
 
-export const handle = (err: any) => {
+export const handle = (err: Error & PrettyPrintableError | CLIError & PrettyPrintableError) => {
   try {
     if (!err) err = new Error('no error?')
     if (err.message === 'SIGINT') process.exit(1)
+
+    const shouldPrint = !(err instanceof ExitError)
+    const pretty = prettyPrint(err)
     const stack = clean(err.stack || '', {pretty: true})
-    let message = stack
-    if (err.oclif && typeof err.render === 'function') message = err.render()
-    if (message) console.error(message)
-    const exitCode = (err.oclif && err.oclif.exit !== undefined) ? err.oclif.exit : 1
+
+    if (shouldPrint) {
+      console.error(pretty ? pretty : stack)
+    }
+    const exitCode = ('oclif' in err && err.oclif.exit !== undefined) ? err.oclif.exit : 1
     if (config.errorLogger && err.code !== 'EEXIT') {
-      config.errorLogger.log(stack)
+      if (err.stack) {
+        config.errorLogger.log(stack)
+      }
+
       config.errorLogger.flush()
       .then(() => process.exit(exitCode))
       .catch(console.error)

test/handle.test.ts

@@ -42,7 +42,7 @@ describe('handle', () => {
   .stderr()
   .finally(() => delete process.exitCode)
   .it('handles a badly formed error object', () => {
-    handle({status: 400})
+    handle({status: 400} as any)
     expect(process.exitCode).to.equal(1)
   })