[version] more systematic printing and not requiring git

Makefile

@@ -23,6 +23,7 @@ converttest: convert_superstring_unittest.py
 	./convert_superstring_unittest.py
 
 kmercamel: $(SRC)/main.cpp $(SRC)/$(wildcard *.cpp *.h *.hpp) src/version.h
+	./create-version.sh
 	$(CXX) $(CXXFLAGS) $(SRC)/main.cpp -o $@ $(LDFLAGS)
 	cp kmercamel  🐫 || true
 

create-version.sh

@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-cat <(echo "#define VERSION \"") src/version <(echo -) <(git rev-parse HEAD | head -c6) <(echo \") | tr -d '\n' > src/version.h
+cat <(echo "#define VERSION \"") <(git describe --abbrev=4 --dirty --always --tags 2> /dev/null || cat src/version) <(echo \") | tr -d '\n' > src/version.h

src/version

@@ -1 +1 @@
-0.2
+v0.1