It has support for many languages (called rules [0]) and it has support for many tools for that specific language ecosystem. For example the Scala rules have s

It has support for many languages (called rules [0]) and it has support for many tools for that specific language ecosystem. For example the Scala rules have specs2 (a unit testing lib/harness/framework/thing) [1] I have no idea how this all works in practice. [0] https://github.com/bazelbuild/bazel/blob/master/site/docs/rules.md#rules https://github.com/bazelbuild/bazel/blob/master/site/docs/ru... [1] https://github.com/bazelbuild/rules_scala/blob/master/examples/testing/specs2_junit_repositories/example/BUILD https://github.com/bazelbuild/rules_scala/blob/master/exampl...