Default location of .jgo on Windows

[imagejan]

On Windows, it seems that Maven puts its .m2 folder into %USERPROFILE%\.m2 by default, whereas the default location for .jgo is %HOME%\.jgo.

This can be problematic in cases where %HOME% points to e.g. a network drive location (as required for environments using shared desktops across the machines of an organization). If that is different from %USERPROFILE% (which usually points to C:\Users\<username>), errors such as the one below can occur when using jgo via pyimagej in a Jupyter notebook:

FileNotFoundError: [WinError 3] The system cannot find the path specified: 'H:\\.m2\\repository\\com\\headius\\invokebinder\\1.2\\invokebinder-1.2.jar' -> 'H:\\.jgo\\net\\imglib\\imglib2-imglyb\\0.3.0+net.imagej-imagej-RELEASE+net.imglib-imglib2-imglyb-0.3.0+net.imglib-imglib2-imglyb-0.3.0\\invokebinder-1.2.jar'

@ctrueden can we change the default location of .jgo to %USERPROFILE%\.jgo as well? If not, we should at least fix the lookup for .m2 here:

https://github.com/scijava/jgo/blob/20553f3f63c8161ce8b1ebaa488fa469449cc32e/jgo.sh#L79-L81

and change this:

https://github.com/scijava/jgo/blob/f1037d7d6cf9a1596d669c5c0d2e3e9d7853500d/jgo/jgo.py#L169-L170

to something like this:

def m2_path(): 
     return os.getenv("M2_REPO", os.path.join(os.environ['USERPROFILE'], ".m2").absolute())

A workaround would likely be to define an M2_HOME environment variable, right?

[hanslovsky]

can we change the default location of .jgo to %USERPROFILE%\.jgo as well?

I don't see any reason why not.

[ctrueden]

Sure, I think we should make it consistent.