smap_errors

Map stack traces from an minified to a un-minified source

smap_errors

You have source maps in production, but get stack traces back like this:

TypeError: Cannot read property 'value' of undefined
    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:15163
    at a (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:14478
    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:14548
    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:15197
    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:18301
    at Object.e.showTraining (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:22:6381
    at Object.r [as showTraining] (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:17:11134
    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:22:4695
    at n (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:18574
    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:17717

What you'd really like is a stack trace back to your unminfied code.

$ npm install -g smap_errors
smtlaissezfaire$ cat errors.txt

["TypeError: Cannot read property 'value' of undefined",
 "    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:15163",
 "    at a (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:14478)",
 "    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:14548",
 "    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:15197",
 "    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:18301",
 "    at Object.e.showTraining (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:22:6381)",
 "    at Object.r [as showTraining] (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:17:11134)",
 "    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:22:4695",
 "    at n (https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:18574)",
 "    at https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js:1:17717"],

smtlaissezfaire$ cat errors.txt | smap_errors

Fetching url: https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js
Fetching url: https://www.learnup.com/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.js.map

      995:17  at:              `value` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
      926:6   at:           `iterator` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
      935:12  at:            `iterate` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
      997:8   at:           `callback` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
     1276:21  at:               `call` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
    34183:4   at:                 `cb` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
    26375:25  at:              `apply` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
    34086:11  at:       `showTraining` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
     1300:23  at:              `apply` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)
     1229:21  at:              `apply` (/assets/front_end-5c61818c6e14fa865d9c7a59080878a1.orig.js)

Just pipe in your error report on STDIN.

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