"Late provide error" in compiling clojurescript files

[Praki]

Hi,

I have a silly problem compiling my cljs files. I have to run the
cljsc command twice in succession to generate javascript source. The
first compilation results in:

ERROR: JSC_LATE_PROVIDE_ERROR. required "foo.bar" namespace not
provided yet at /home/.../src/../target/classes/public/js/core.js line
18 : 12

Please note that my core.cljs requires foo.bar namespace. The second
cljsc command works without any error.

I doubt that clojurescript compiler requires running it multiple times
in succession and suspect some problem in my usage of it. I would
expect closure compiler to process the transitive dependencies
correctly.

I see the same issue with cljs-watch which is a major productivity
issue for me.

Has anyone else encountered this issue? Does anybody know the cause of
this error?

Thanks

[Benjamin Teuber]

Hi,

I just had the same problem and discovered it was a cyclic dependency
- maybe you want to check for that, too..

Regards Benjamin

[Praki Prakash]

Thanks for your response Benjamin. I was leaning towards cyclic
dependency myself. I couldn't get closurebuilder.py (which apparently
detects cyclic dependencies) but couldn't get it to run on my source.
After your response, I did a dependency analysis by hand and found no
cycles. However, I narrowed down this error to only hyphenated
namespaces. After some more snooping around, I found the cause to be
requiring foo.bar-baz as foo.bar_baz (in some places). I suspect that
this confused the dependency analysis. I don't fully understand
how/why it works when I compile again but, boy, am I glad to have
cljs-watch work! Big time saver!

Hopefully, someone from the clojurescript compiler team can enlighten on this.

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