feat: better stack formater

src/reporters/basic.js

@@ -1,3 +1,5 @@
+import { formatStack } from '../utils'
+
 export default class BasicReporter {
   constructor (stream) {
     this.stream = stream || process.stdout
@@ -23,7 +25,11 @@ export default class BasicReporter {
     }
 
     if (logObj.stack) {
-      this.stream.write(logObj.stack + '\n')
+      const stack = formatStack(logObj.stack, {
+        prefix: '> '
+      })
+
+      this.stream.write(stack + '\n')
     }
   }
 }

src/reporters/fancy.js

@@ -1,6 +1,7 @@
 import chalk from 'chalk'
 import figures from 'figures'
 import startCase from 'lodash/startCase'
+import { formatStack } from '../utils'
 
 const NS_SEPARATOR = chalk.blue(figures(' › '))
 
@@ -61,9 +62,11 @@ export default class FancyReporter {
     }
 
     if (logObj.stack) {
-      const stack = Array.isArray(logObj.stack) ? logObj.stack : logObj.stack.split('\n')
-      const lines = stack.map(s => '  ' + s.trim()).join('\n')
-      this.stream.write(chalk[logObj.additionalStyle || 'grey'](lines) + '\n')
+      const stack = formatStack(logObj.stack, {
+        suffix: ' ↲'
+      })
+
+      this.stream.write(chalk[logObj.additionalStyle || 'grey'](stack) + '\n')
     }
   }
 }

src/utils.js

@@ -11,3 +11,15 @@ export function assignToLogObj (logObj, obj) {
     }
   }
 }
+
+export function formatStack (stack, { prefix = '  ', suffix = '' } = {}) {
+  let lines = stack
+    .split('\n')
+    .map(l => l.trim().replace(/^at /, ''))
+
+  if (lines[0].indexOf('Error: ') === 0) {
+    lines = lines.splice(1)
+  }
+
+  return prefix + lines.join(suffix + '\n' + prefix) + suffix
+}