build: do not run pip install outside the bazel build framework

.buildkite/pipeline.yml

@@ -96,7 +96,7 @@ steps:
       - ./tools/licenses.sh /tmp/test-artifacts/licenses
       - diff -rNu3 /tmp/test-artifacts/licenses ./licenses/data
       - echo "--- gomocks"
-      - ./tools/gomocks.py diff
+      - make mocksdiff
       - echo "--- antlr"
       - rm -rf /tmp/test-artifacts/antlr
       - cp -R antlr/ /tmp/test-artifacts/antlr

Makefile

@@ -1,4 +1,4 @@
-.PHONY: all build build-dev dist-deb antlr clean docker-images gazelle go.mod licenses mocks protobuf scion-topo test test-integration write_all_source_files git-version
+.PHONY: all build build-dev dist-deb antlr clean docker-images gazelle go.mod licenses mocks mocksdiff protobuf scion-topo test test-integration write_all_source_files git-version
 
 build-dev:
 	rm -f bin/*
@@ -88,7 +88,10 @@ protobuf:
 	chmod 0644 pkg/proto/*/*.pb.go pkg/proto/*/*/*.pb.go
 
 mocks:
-	tools/gomocks.py
+	bazel run //tools:gomocks
+
+mocksdiff:
+	bazel run //tools:gomocks -- diff
 
 gazelle: go_deps.bzl
 	bazel run //:gazelle --verbose_failures --config=quiet

tools/gomocks.py

@@ -27,6 +27,7 @@ def rule_to_file(rule: str) -> Tuple[str, str]:
 
 def mock_rules() -> List[str]:
     bazel = plumbum.local['bazel']
+    os.chdir(os.environ.get("BUILD_WORKING_DIRECTORY","/nonexistium"))
     raw_rules = bazel("query", "filter(\"go_default_mock$\", kind(gomock, //...))")
     return raw_rules.splitlines()
 

tools/install_deps

@@ -8,4 +8,4 @@ if which apt-get >& /dev/null; then
 elif which yum >& /dev/null; then
   "$BASE/env/rhel/deps"
 fi
-"$BASE/env/pip3/deps"
+