On 01Sep2015 17:25, Yury Selivanov <yselivanov.ml@gmail.com> wrote:
What makes it particularly difficult is that if you "fix a bug" in a library like appdirs, so that it starts suddenly returning different results on some computer somewhere, then what it looks like to the end user is that their data/settings/whatever have suddenly evaporated [...] Generally when applications change how they compute these directories, they also include tricky migration logic to check both the old and new names, move stuff over if needed, but I'm not sure how a low-level library like this can support that usefully...
If it were me I'd want to keep a little state recording what choices were made for these things and whether those were the defaults. Then you can check that on next run: if the choice was a default and the default no longer matches, migrate. Of course, if the default location for this state changes... Not pretending I'm offering a comprehensive solution, I remain, Cameron Simpson <cs@zip.com.au> "waste cycles drawing trendy 3D junk" - Mac Eudora v3 config option