Ndiff: use Zenmap's Version.py

Makefile.in

@@ -256,6 +256,7 @@ clean-zenmap:
 	rm -f $(ZENMAPDIR)/zenmapCore/Name.pyc
 
 clean-ndiff:
+	rm -f $(NDIFFDIR)/Version.pyc
 
 clean-nping:
 	-cd $(NPINGDIR) && $(MAKE) clean
@@ -366,7 +367,10 @@ install-zenmap: $(ZENMAPDIR)/pyproject.toml
 # Create a symlink from xnmap to zenmap unconditionally.
 	ln -sf zenmap $(DESTDIR)$(bindir)/xnmap
 
-build-ndiff:
+$(NDIFFDIR)/Version.py: $(ZENMAPDIR)/zenmapCore/Version.py
+	cp $^ $@
+
+build-ndiff: $(NDIFFDIR)/pyproject.toml $(NDIFFDIR)/Version.py
 	$(PYTHON) -m build $(NDIFFDIR)/
 
 build-nping: $(NPINGDIR)/Makefile build-nbase build-nsock build-netutil $(NPINGDIR)/nping.h @DNET_BUILD@ @PCAP_BUILD@

ndiff/Version.py

@@ -0,0 +1 @@
+VERSION = "7.97"

ndiff/pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "ndiff"
 license = {text = "Nmap License (https://nmap.org/book/man-legal.html)"}
-version = "7.96"
+dynamic = ["version"]
 authors = [{name = "The Nmap Project"}]
 description = "Nmap scan diff tool"
 readme = {file = "README", content-type = "text/plain"}
@@ -23,5 +23,8 @@ ndiff = "ndiff:run_main"
 [tool.setuptools]
 py-modules = ["ndiff"]
 
+[tool.setuptools.dynamic]
+version = {attr = "Version.VERSION"}
+
 #[tool.setuptools.packages.find]
 #include = ["ndiff"]