Only invalidate part of the VFS when trying to watch a symlink on macOS

[wolfs]

Currently, Gradle stops watching altogether on macOS when a watched directory or its parent is a symlink (#13755). On macOS, /var is a symlink to /private/var and the temporary directory is in /var. That means that whenever temporary files are build inputs. Gradle would stop watching on macOS.

This was a problem when using Gradle profiler, since it adds some JARs for instrumentation in the temp folder as classpath of an init script. Gradle profiler now passes the canonical path to the init script, so that is not a problem any more (gradle/gradle-profiler#222).

Note that we we only watch the project directory and nothing else, this problem goes away. See #13887.

---

cc: @gradle/execution

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Given the limited bandwidth of the team, it will be automatically closed if no further activity occurs. If you're interested in how we try to keep the backlog in a healthy state, please read our blog post on how we refine our backlog. If you feel this is something you could contribute, please have a look at our Contributor Guide. Thank you for your contribution.