Make builds of old spec versions available

document/Makefile

@@ -1,4 +1,4 @@
-DIRS     = js-api web-api core
+DIRS     = js-api web-api core versions
 FILES    = index.html
 BUILDDIR = _build
 TAR      = tar
@@ -60,7 +60,7 @@ $(DIRS:%=build-%): build-%:
 	(cd $(@:build-%=%); make BUILDDIR=$(BUILDDIR) all)
 
 .PHONY: $(DIRS:%=dir-%)
-$(DIRS:%=dir-%): dir-%:
+$(DIRS:%=dir-%): dir-%: $(BUILDDIR)
 	mkdir -p $(BUILDDIR)/$(@:dir-%=%)
 	rm -rf $(BUILDDIR)/$(@:dir-%=%)/*
 	cp -R $(@:dir-%=%)/$(BUILDDIR)/html/* $(BUILDDIR)/$(@:dir-%=%)/

document/index.html

@@ -67,6 +67,15 @@ <h3>Embedder specifications</h3>
   <a href="https://github.com/WebAssembly/spec/">here</a>.
 </p>
 
+
+<h3>All versions</h3>
+
+<ul>
+  <li><a href="versions/core/WebAssembly-1.0">WebAssembly 1.0</a> (2017)</li>
+  <li><a href="versions/core/WebAssembly-2.0">WebAssembly 2.0</a> (2022)</li>
+  <li><a href="versions/core/WebAssembly-3.0-draft">WebAssembly 3.0</a> (Draft 2024)</li>
+</ul>
+
 </article>
 </div>
 </body>

document/versions/Makefile

@@ -0,0 +1,14 @@
+DIRS = core
+DIRNAME = versions
+BUILDDIR = _build
+
+.PHONY: all
+all:
+	mkdir -p $(BUILDDIR)/html/$(DIRNAME)
+	cp -R $(DIRS) $(BUILDDIR)/html/$(DIRNAME)/
+
+.PHONY: diff
+diff:
+
+.PHONY: clean
+clean: