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'use strict';
const StackUtils = require('stack-utils');
const cleanStack = require('clean-stack');
const debug = require('debug')('ava');
// Ignore unimportant stack trace lines
let ignoreStackLines = [];
const avaInternals = /\/ava\/(?:lib\/)?[\w-]+\.js:\d+:\d+\)?$/;
const avaDependencies = /\/node_modules\/(?:bluebird|empower-core|(?:ava\/node_modules\/)?(?:babel-runtime|core-js))\//;
const stackFrameLine = /^.+( \(.+:\d+:\d+\)|:\d+:\d+)$/;
if (!debug.enabled) {
ignoreStackLines = StackUtils.nodeInternals();
ignoreStackLines.push(avaInternals);
ignoreStackLines.push(avaDependencies);
}
const stackUtils = new StackUtils({internals: ignoreStackLines});
function extractFrames(stack) {
return stack
.split('\n')
.map(line => line.trim())
.filter(line => stackFrameLine.test(line))
.join('\n');
}
/**
* Given a string value of the format generated for the `stack` property of a
* V8 error object, return a string that contains only stack frame information
* for frames that have relevance to the consumer.
*
* For example, given the following string value:
*
* ```
* Error
* at inner (/home/ava/ex.js:7:12)
* at /home/ava/ex.js:12:5
* at outer (/home/ava/ex.js:13:4)
* at Object.<anonymous> (/home/ava/ex.js:14:3)
* at Module._compile (module.js:570:32)
* at Object.Module._extensions..js (module.js:579:10)
* at Module.load (module.js:487:32)
* at tryModuleLoad (module.js:446:12)
* at Function.Module._load (module.js:438:3)
* at Module.runMain (module.js:604:10)
* ```
*
* ...this function returns the following string value:
*
* ```
* inner (/home/ava/ex.js:7:12)
* /home/ava/ex.js:12:5
* outer (/home/ava/ex.js:13:4)
* Object.<anonymous> (/home/ava/ex.js:14:3)
* ```
*/
module.exports = stack => {
if (!stack) {
return '';
}
stack = extractFrames(stack);
// Workaround for https://github.com/tapjs/stack-utils/issues/14
// TODO: fix it in `stack-utils`
stack = cleanStack(stack);
return stackUtils.clean(stack)
// Remove the trailing newline inserted by the `stack-utils` module
.trim();
};
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