Consider Exclusion directory in qtmoc or unicode absolute path

[rashwell]

So this isn't really qtmoc's issue, but it could help deal with windows issues.

Challenge:

• Basically qtmoc is rifling through the app dir files and directories looking for stuff
• Sometimes people manage projects and builds with things like gulp and node even when coding golang
• This tends to put a node_modules directory in the app folder that is very deep with really long path names
• qtmoc should try to ignore or have a method to ignore that directory. IMHO

Outcomes:

When qtmoc walks the file path into the node_modules directory depending on what is there on windows etc, it panics deep in golang filepath

Reason:

GO filepath os issues with long file name paths:

• Golang Issue 3358
• Golang Issue 15615

Options:

It makes sense to me to craft a method of excluding / blacklisting some directories that won't have anything in them related to qt / go / etc.

Alternatives:

• It looks like based on the the two golang issues you can prepend a \?\ to the front of the absolute path for the appdir before you start the traversal and it will increase the limit on file length, but I don't know if that would work across os's or if this is a windows only bit.
• Or just add a tip or a FAQ not to have things like "node_modules" in the project directory where qtdeploy/qtmoc etc get run.

[therecipe]

Hey

Thanks for the suggestion :)

There is already a blacklist function in qtmoc https://github.com/therecipe/qt/blob/master/cmd/qtmoc/moc.go#L463-L472
(Sorry for the mess, I hadn't had time to cleanup the tooling yet)

Would you mind adding your fixes and send a pull request?

I think qtminimal has probably the same issue, but I didn't create the blacklist function there yet.

Thank you :)

[therecipe]

I blacklisted the "node_modules" dir in qtmoc and qtminimal with 0ffd648
and it seems Go 1.8 will support long absolute paths out of the box.

Thanks again :)