Support instrumenting coffeescript

[jdfree]

The ibrik project (https://github.com/Constellation/ibrik) has added some coffeescript support to istanbul, but is incomplete. It does, however, have a nice instrumenter.coffee. With minimal effort, this instrumenter could be compiled to js and used by istanbul so that istanbul's instrument command can instrument either js or coffee using the same command that presently only handles js. Operations that make use of "instrument" + "report" (for example, this: https://github.com/airportyh/testem/tree/master/examples/coverage_istanbul) would then have full coffeescript support.

[willhoag]

+1

[jigfox]

+1
Any news on this except for #167 which isn't merge yet

[lo1tuma]

👎
I think istanbul should not support coffescript directly, there are a lot of other compile-to-js languages (e.g. typescript, jsx). The best thing would be if istanbul would support generic preprocessors.

[Zolmeister]

+1

@lo1tuma see #167 for why source-maps aren't sufficient

[silkentrance]

@gotwarlost transpiling first + sourcemaps will do the trick. Please close as this is basically just a usage issue. Thanks!