how do I increase stack trace of gulp task?

问题

$ gulp patch
[17:13:27] Requiring external module coffee-script/register
[17:13:28] Using gulpfile ~/source/sem-campaign.js/gulpfile.coffee
[17:13:28] Starting 'bump'...
[17:13:28] Starting 'add'...
[17:13:28] Bumped version to: 1.0.2
[17:13:28] Bumped version to: 1.0.2
[17:13:28] Finished 'bump' after 31 ms
[17:13:28]
[17:13:28] Finished 'add' after 30 ms
[17:13:28] Starting 'commit'...
[?] enter a commit msg, eg initial commit: initial commit
[17:13:32] Finished 'commit' after 3.26 s
[17:13:32] Starting 'patch'...
no buddy
[17:13:32] Finished 'patch' after 25 μs

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: Command failed:
  at ChildProcess.exithandler (child_process.js:648:15)
  at ChildProcess.emit (events.js:98:17)
  at maybeClose (child_process.js:756:16)
  at Socket.<anonymous> (child_process.js:969:11)
  at Socket.emit (events.js:95:17)

It's hard for me to tell where my gulp task is failing and why. How can I increase the default stack trace?

回答1:

Add comments and plumber:

Add this helper method:

log = (msg) -> console.log msg # you're going to receive Vinyl files as chunks transform = (file, cb) -> # read and modify file contents # file.contents = new Buffer(String(file.contents) + ' some modified content');
```
# if there was some error, just pass as the first parameter here
cb(null, file);
```
# returning the map will cause your transform function to be called # for each one of the chunks (files) you receive. And when this stream # receives a 'end' signal, it will end as well. # # Additionally, you want to require the event-stream somewhere else. return eventStream.map(transform);
pipe thw log method between steps in a task:

gulp.task 'myTask', -> gulp.src myCss, base: myBase .pipe log "Got css files!" .pipe concat 'app.css' .pipe log "concated css!!"

this is written in coffeescript, you can turn it to javascript here: http://js2coffee.org/

create a catch error helper method:

catchError = (err) -> plugins.util.beep() # ref; console.log err
add plumber to plugins:

gulp.task 'myTask', -> gulp.src myCss, base: myBase .pipe plugins.plumber errorHandler: catchError .pipe log "Got css files!" .pipe concat 'app.css' .pipe log "concated css!!"

Done! :)

More resources to check out: gulp-print gulp-debug

来源：https://stackoverflow.com/questions/26197238/how-do-i-increase-stack-trace-of-gulp-task

标签

node.js

gulp