Update fltk.rb to support HEAD for OS X El Capitan

[jmtatsch]

Added HEAD option for building from svn in order to build with OS X El Capitan

[DomT4]

These two lines (The comment and the depends_on) should be one empty line beneath the :DATA patch line.

[DomT4]

fltk:
 * 4: Trailing whitespace was found
 * 17: Trailing whitespace was found

[DomT4]

Still some whitespacing issues here:

        Error: 3 problems in 1 formula
fltk:
 * 4: Trailing whitespace was found
 * 15: Trailing whitespace was found
 * 19: Trailing whitespace was found

[DomT4]

I can't seem to clone it non-interactively locally:

==> Cloning http://seriss.com/public/fltk/fltk/branches/branch-1.3/
svn checkout http://seriss.com/public/fltk/fltk/branches/branch-1.3/ /usr/local/var/homebrew/cache/fltk--svn-HEAD
Authentication realm: <http://seriss.com:80> Subversion repository
Password for '':

Authentication realm: <http://seriss.com:80> Subversion repository
Username:
Password for '':

😢. We don't do interactivity as it's bad UX and means automated scripts/builds/etc fall over.

[jmtatsch]

That is weird, I don't need to use interactive mode. For me it works just fine and i don't have any creds for their svn server. I can't browse their svn via http though.
Can brew checkout from svn "natively" or is an svn installation necessary as requirement? Can the builedbot check it out?

brew install fltk --HEAD
==> Cloning http://seriss.com/public/fltk/fltk/branches/branch-1.3/
Updating /Library/Caches/Homebrew/fltk--svn-HEAD
==> cmake . -DCMAKE_C_FLAGS_RELEASE= -DCMAKE_CXX_FLAGS_RELEASE= -DCMAKE_INSTALL_PREFIX=/usr/local/Cellar/fltk/HEAD -DCMAKE_BUILD_TYPE=Release -DCMAKE_FIND_FRAMEWORK=LAST -DCMAKE_VERB
==> make install
🍺  /usr/local/Cellar/fltk/HEAD: 175 files, 4,5M, built in 84 seconds

[dpo]

Just put this together to build the devel snapshot: https://gist.github.com/5b906b02e585d6f43eec
They advertise that it builds on 10.11. I don't have that system to try.

[jmtatsch]

Just checked out the formula @dpo provided. It builds fine on El Cap, doesn't suffer from that strange svn credential problem, but does configure threads and shared properly. Yay!

[dpo]

Note that there seems to be a mirror of the source on Github (https://github.com/Homebrew/homebrew-science/issues/2871#issuecomment-147500027) but I'm not sure how "official" it is.

[DomT4]

Just put this together to build the devel snapshot: https://gist.github.com/5b906b02e585d6f43eec
They advertise that it builds on 10.11. I don't have that system to try.

Would be happy to take a devel build like this, but the upstream website gives the impression it would need daily updating for the URL to keep working. If that's not the case, happy to take it.

[dpo]

I just tried downloading a few past "devel" releases, and it seems like they stick around, at least for a while. I'll prepare a PR.