Exception raise during font generation

Hi Frederik,

When our code calls "generate" to generate a TrueType font (in RobFont 1.6 build 1410152315),
we sometimes get the following error :

File "lib/fontObjects/robofabWrapper.pyc", line 3834, in generate
File "lib/fontObjects/doodleFont.pyc", line 909, in generate
File "lib/fontObjects/doodleFontCompiler/ttfCompiler.pyc", line 575, in compile
File "shutil.pyc", line 256, in rmtree
File "shutil.pyc", line 254, in rmtree
OSError: [Errno 66] Directory not empty: '/var/folders/vk/6h2qct291rn53wdyxh2wzpw40000gp/T/tmppr3tfd'

It seems a bit weird. I'm not sure if that's a bug in our code in RF.

The path to the temporary directory is not generated by our code, so my guess is that it is generated by RoboFont.

I hope you can take a few minutes to check if there may be some easy-to-fix bug in there? or maybe a workaround.

Thank you,
Samuel

frederik

I'm aware of that option and this will be implemented, but still there is something wrong with the provided data to the binary ttf compiler...

Looking at this StackOverflow: http://stackoverflow.com/a/21966211/2037879
It looks like this error is reported by default upon trying to delete non-empty directory and may be bypassed by setting ignore_errors=True in rmtree parameters.

frederik

weird, shutil.rmtree must be able to remove a directory that is not empty.

but the file size is zero of that compile.otf file

I guess something went wrong while generating, you can print out font.generate(...) to see what or where it failed

good luck!

By the way, the temporary directory mentioned in the error message still exists after the exception is raised.
It contains an empty file:

$ ls -l tmppr3tfd
total 0
-rw-r--r--  1 username  usergroup  0 Jun 10 13:45 compile.otf