build: allow building without scion-ci

.buildkite/pipeline.yml

@@ -118,7 +118,7 @@ steps:
     - label: "E2E: default :docker: (ping)"
       command:
         - echo "--- build"
-        - make build docker-images
+        - make build-dev docker-images
         - echo "--- start topology"
         - ./scion.sh topology -d
         - ./scion.sh run

Makefile

@@ -1,14 +1,23 @@
-.PHONY: all antlr bazel clean docker-images gazelle go.mod licenses mocks protobuf scion-topo test test-integration write_all_source_files
+.PHONY: all build build-dev antlr clean docker-images gazelle go.mod licenses mocks protobuf scion-topo test test-integration write_all_source_files
 
-build: bazel
+build-dev:
+	rm -f bin/*
+	bazel build //:scion //:scion-ci
+	tar -kxf bazel-bin/scion.tar -C bin
+	tar -kxf bazel-bin/scion-ci.tar -C bin
+
+build:
+	rm -f bin/*
+	bazel build //:scion
+	tar -kxf bazel-bin/scion.tar -C bin
 
 # all: performs the code-generation steps and then builds; the generated code
 # is git controlled, and therefore this is only necessary when changing the
 # sources for the code generation.
 # Use NOTPARALLEL to force correct order.
 # Note: From GNU make 4.4, this still allows building any other targets (e.g. lint) in parallel.
 .NOTPARALLEL: all
-all: go_deps.bzl protobuf mocks gazelle build antlr write_all_source_files licenses
+all: go_deps.bzl protobuf mocks gazelle build-dev antlr write_all_source_files licenses
 
 clean:
 	bazel clean
@@ -18,12 +27,6 @@ scrub:
 	bazel clean --expunge
 	rm -f bin/*
 
-bazel:
-	rm -f bin/*
-	bazel build //:scion //:scion-ci
-	tar -kxf bazel-bin/scion.tar -C bin
-	tar -kxf bazel-bin/scion-ci.tar -C bin
-
 test:
 	bazel test --config=unit_all
 

doc/dev/setup.rst

@@ -72,6 +72,9 @@ Bazel
 
       make
 
+  .. hint:: This builds tools for tests in addition to the main SCION services (e.g., `end2end`);
+     if you don't require those, you can only build the SCION services by running ``make build``.
+
 #. Finally, check that tests run correctly:
 
    .. code-block:: bash