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Buck 2 specific options

Buck 2 introduces some options that don't exist in v1 and are accessed in the root cell:

  • project.watchman_merge_base: defines the merge base to use for SCM-aware queries to Watchman. This is read when the daemon starts and cannot be changed later without a restart.
  • test.v2_test_executor: defines the program to invoke as the test executor in buck test. This is read every time a test command executes.