Bugfixes (#61 and #46) and minor performance improvements.

[niwinz]

Hi.

This pr includes:

1. Fix for issue #61. That issue causes a lot of unexpected exceptions using cljx together with speclj.
2. Improvement on partial building: relativize path process changed from use of URI to Path, that handles much better paths that URI and not prepends unexpecred file; and now a filtes are filtered by build source-path.
3. Fix for issue #46: polling reate drecreased to more apropiate one (100ms)
4. Minor performance improvement with little cost of additional memmory adding memoized version of transform. (I have tested in my project and memory fooprint is negligible.)

[cemerick]

Thank you very much for the patch. A couple of things:

1. Can you break this up into one PR for each problem/change? As it stands, it's not easy to tell what each part of the diff is addressing.
2. Path, etc. requires JDK7+, but ClojureScript only requires JDK6+ IIRC. Could you explain what the issue is that your (2) is addressing?

[niwinz]

Hi Chas!

Ok, I've removed not related commits to #60 issue and I will send them as separate PR.

• The first commit (97b6f33) is a dirty but quick and easy fix to the main problem (#61). It disables the partial compilation and always compiles everything. That approach is good but maybe slower in big projects. And it can be addressed in two ways: memoizing or implement proper partial compilation.
• The second commit (52b9c5f) implements a proper partial compilation. Avoiding wrong relative path handling of URI using nio Path. (I known that nio is jdk7 and about clojure jdk6 support but, cljx is not clojure... JDK6 is officially not supported...)

The previos implementation has two drawbacks:

• It intents to relativize all files idependently of source. That cause of use relativize file path with not corresponding rootpaths. (it is fixed in second commit filtering by source firstly)
• URI has unexpected behavior for cljx (maybe expected on how URI should work), because when relativize is done over path with baspath that does not have the same root. It prepens "file:" prefix, and consecuently it is treat as relative path in the rest of cljx code (because the resultant path not starts with "/")

Appending file: is a proper behavior for URI but not for filesystem paths. For it, nio Path fits much better, because it handles the fs paths much correctly that URI.

In my opinion, we should keep Path, but if your insist on have support for JDK6, I'll try to reimplement the second commit using URI with explicit checking the "file:" prefix, for removing it.

[niwinz]

In any case, each commit has a little explication about it changes (on the body of the commit).

[cemerick]

Yes, let's please keep JDK6 compat. I don't use it, but others might. Tracking the compatibility targets of Clojure and ClojureScript is the right thing to do.

Thanks for the tidying! Looking forward to merging.

[imikushin]

+1 This fix is critical for lein cljx auto to be useful (e.g. with lein cljsbuild auto). I've merged this into my fork. Does the job. (BTW, I don't think JDK6 is still relevant)

[niwinz]

Replaced by new pr, already linked ;)