dont rebuild on test

.github/workflows/verify.yml

@@ -28,4 +28,7 @@ jobs:
     - name: build
       working-directory: ./backend
       run: make all LD=clang++-22 CXX=clang++-22
+    - name: test
+      working-directory: ./backend
+      run: make test
 

backend/Makefile

@@ -33,26 +33,33 @@ obj_dir = $(build_dir)/obj
 src_dir = src
 test_dir = tests
 
-sources = $(shell find $(src_dir) -name '*.cpp' -and -not -name 'main.cpp')
-sources_with_main=$(sources) src/main.cpp
+sources_without_main = $(shell find $(src_dir) -name '*.cpp' -and -not -name 'main.cpp')
+main_source = src/main.cpp
+sources = $(sources_without_main) $(main_source)
 
-tests = $(shell find $(test_dir) -name '*.cpp')
+objects_without_main = $(sources_without_main:%.cpp=$(obj_dir)/%.o)
+main_object = $(main_source:%.cpp=$(obj_dir)/%.o)
+objects = $(objects_without_main) $(main_object)
 
-target=$(build_dir)/backend
+target = $(build_dir)/backend
 
-all: $(target)
+test_sources = $(shell find $(test_dir) -name '*.cpp')
+test_objects = $(test_sources:$(test_dir)/%.cpp=$(obj_dir)/$(test_dir)/%.o)
+test_targets = $(test_sources:$(test_dir)/%.cpp=$(build_dir)/$(test_dir)/test_%)
 
-$(target): $(sources_with_main:%.cpp=$(obj_dir)/%.o)
+all: $(target) $(test_targets)
+
+$(target): $(objects)
 	$(LD) -o $@ $(CXXFLAGS) $(LDFLAGS) $^
 
 $(obj_dir)/%.o:%.cpp
 	@mkdir -p $(dir $@)
 	$(CXX) $< -c -o $@ -MMD -MP $(CXXFLAGS)
 
-test: $(tests:tests/%.cpp=$(build_dir)/tests/test_%)
+test: $(test_targets)
 	printf "%s\n" $^ | xargs -I % sh -c 'echo "- %..." && ./% && echo "- %: OK" || (echo "- %: FAILED" && exit 1)'
 
-$(build_dir)/tests/test_%: $(obj_dir)/tests/%.o $(sources:%.cpp=$(obj_dir)/%.o)
+$(build_dir)/$(test_dir)/test_%: $(test_objects) $(objects_without_main)
 	@mkdir -p $(dir $@)
 	$(LD) -o $@ $(CXXFLAGS) $(LDFLAGS) $^
 
@@ -65,5 +72,5 @@ check:
 clean:
 	rm -rf $(build_dir)
 
--include $(sources_with_main:%.cpp=$(obj_dir)/%.d) $(tests:%.cpp=$(obj_dir)/%.d)
+-include $(sources:%.cpp=$(obj_dir)/%.d) $(tests:%.cpp=$(obj_dir)/%.d)