add Makefile, bazel support

Add a Makefile and support generating bazel files to allow overriding
the dependency in CRDB.

.gitignore

@@ -23,3 +23,6 @@ go.work.sum
 
 .idea/
 
+# Bazel files, generated with 'make gen-bazel'.
+/WORKSPACE
+BUILD.bazel

Makefile

@@ -0,0 +1,31 @@
+GO := go
+PKG := ./...
+GOFLAGS :=
+STRESSFLAGS :=
+TAGS := crlib_invariants
+TESTS := .
+
+.PHONY: gen-bazel
+gen-bazel:
+	@echo "Generating WORKSPACE"
+	@echo 'workspace(name = "com_github_cockroachdb_crlib")' > WORKSPACE
+	@echo 'Running gazelle...'
+	${GO} run github.com/bazelbuild/bazel-gazelle/cmd/[email protected] update --go_prefix=github.com/cockroachdb/crlib --repo_root=.
+	@echo 'You should now be able to build Cockroach using:'
+	@echo '  ./dev build short -- --override_repository=com_github_cockroachdb_crlib=${CURDIR}'
+
+.PHONY: clean-bazel
+clean-bazel:
+	git clean -dxf WORKSPACE BUILD.bazel '**/BUILD.bazel'
+
+.PHONY: test
+test:
+	${GO} test -tags '$(TAGS)' ${testflags} -run ${TESTS} ${PKG}
+
+.PHONY: lint
+lint:
+	${GO} test -tags '$(TAGS)' -run ${TESTS} ./internal/lint
+
+.PHONY: stress
+stress:
+	${GO} test -tags '$(TAGS)' -exec 'stress -p 2 -maxruns 1000' -v -run ${TESTS} ${PKG}