In certain configurations, in particular when installing the Android SDK
using HomeBrew, one sees a configuration with symlinks like:
[brian@brian-macbook git]$ ls -l /usr/local/Cellar/android-sdk/23.0.2/
total 72
...
lrwxr-xr-x 1 brian admin 38 Nov 14 16:39 platforms -> ../../../var/lib/android-sdk/platforms
...
drwxr-xr-x 26 brian admin 884 Nov 14 17:43 tools
In this case, we have
ANDROID_SDK=/usr/local/Cellar/android-sdk/23.0.2/platforms/android-21.
It is an anti-pattern to use ANDORID_SDK/.. to find other paths in the
tree. This pattern is used in at least two places:
1) When we try to find
/usr/local/Cellar/android-sdk/23.0.2/platforms/android-21/../../tools,
we end up in the /usr/local/var/lib subtree. This patch works around
that by exporting and using ANDROID_TOOLS; ANDROID_TOOLS itself is
extracted using path matching, rather than following .. through the
filesystem.
2) We also need to use ANDROID_SDK_ROOT rather than
ANDROID_SDK/../.. through-out.
