Add project-local dependencies installation

Makefile

@@ -1,9 +1,22 @@
 CHICKEN_C = csc
 CSC_FLAGS += -K prefix
+CHICKEN_INSTALL = chicken-install
 
 MODULES = sexc fmt-c fmt-c-writer semen sex-macros sex-modules sex-reader utils
 OBJ = $(MODULES:%=%.o)
 
+DEPSFILE = dependencies.txt
+DEPSLOCK = .eggs.lock
+
+DEPENDENCIES = $(shell cat $(DEPSFILE))
+CHICKEN_EXTERNAL_REPOSITORY := $(shell chicken-install -repository)
+
+export CHICKEN_EGG_CACHE=$(abspath .eggs)/cache
+export CHICKEN_REPOSITORY_PATH=$(abspath .eggs):$(CHICKEN_EXTERNAL_REPOSITORY)
+export CHICKEN_INSTALL_REPOSITORY=$(abspath .eggs)
+
+all: sexc
+
 sexc: main.o $(OBJ)
 	$(CHICKEN_C) $(CSC_FLAGS) $^ -o $@
 
@@ -17,5 +30,20 @@ sex-tests: $(OBJ) tests/*.scm
 	cd ./tests && $(CHICKEN_C) $(CSC_FLAGS) run.scm -c -o sex-tests.o
 	$(CHICKEN_C) $(CSC_FLAGS) $(OBJ) ./tests/sex-tests.o -o sex-tests
 
+run-tests: sex-tests
+	./sex-tests
+
+.eggs.lock: $(DEPSFILE)
+	env | grep CHICKEN
+	$(CHICKEN_INSTALL) $(DEPENDENCIES)
+	touch $(DEPSLOCK)
+
+deps: $(DEPSLOCK)
+
 clean:
 	rm -f $(OBJ) sexc sex-tests main.o ./tests/sex-tests.o
+
+depclean:
+	rm -rf .eggs $(DEPSLOCK)
+
+.PHONY: all deps depclean clean