Build manager plugin

[arrowd]

It would be nice if HIE provided an uniform API to perform build tasks for Haskell projects (like configuring, building, cleaning) using both Cabal and Stack. Here are the features i'm specifically interested in HIE to provide:

• Create a new target
• Add a source file(s) to a target
• Remove target
• Remove files from a target
• Enumerate existing targets
• Build a target
• Clean a target
• Install a target

[alanz]

@arrowdodger, see https://github.com/alanz/haskell-ide-engine/tree/async-example-plugin as a possible template.

[mgsloan]

Agreed, this would be a nice thing to have!

Edit: split off the rest of this comment's content into #140

[alanz]

Perhaps that should be broken out as a separate issue?

[andrewufrank]

the example pluing web-page has vanished. could somebody show an example how a stack oriented build task should be defined? what is the best problemmatche?