Minecrell authored 5 years ago and Oliver Smith committed 5 years ago

At the moment the function does not handle all cases correctly.
For example, it cannot say which package was changed when a file
in a subdirectory of a package was changed.

This is used e.g. in device-samsung-golden:

    device-samsung-golden
    ├── APKBUILD
    ├── deviceinfo
    ├── downstream
    │   ├── init-usb-hook.sh
    │   ├── module-config.conf
    │   └── modules-load.conf
    └── kwin.sh

At the moment, changing a file under "downstream" would attempt
building a "downstream" package, instead of device-samsung-golden.

Refactor the function a bit to walk up the directory hierarchy,
until we find an APKBUILD.