Shareable

Root directory with installed packages can be shared between several local projects. In case if one local project trigger installing of some new third party package then root directory will be locked for modifications until install finished or interrupted. Other local project that will try to run hunter_add_package in same root will be automatically paused and spin waiting for unlock. Note that different root directories do different locks, e.g. triggering build of OpenSSL for iOS will not pause building of GTest for Android. Internally this is done by file(LOCK ...) CMake command (available since 3.2).

Same synchronization done for the initializing Hunter by HunterGate command. This is very handy feature for the CI systems with environment which is shared between several jobs, e.g. Jenkins.