doc: remove node.js dependency

`prep.js` outputs its own HTML directives, which `pandoc` cannot
recognize when converting the document into LaTeX (this is why the
PDF docs have never been highlighted as of now).

Note that if we were to add the `.rust` class to snippets, we could
probably use pandoc's native highlighting capatibilities i.e. Kate.

Author: adrientetar

configure

@@ -457,7 +457,6 @@ probe CFG_PANDOC           pandoc
 probe CFG_PDFLATEX         pdflatex
 probe CFG_XETEX            xetex
 probe CFG_LUATEX           luatex
-probe CFG_NODE             nodejs node
 probe CFG_GDB              gdb
 if [ "$CFG_OSTYPE" = "unknown-linux-gnu" ]
 then

mk/docs.mk

@@ -93,11 +93,6 @@ $(info cfg: no pandoc found, omitting PDF and EPUB docs)
 ONLY_HTML_DOCS = 1
 endif
 
-ifeq ($(CFG_NODE),)
-$(info cfg: no node found, omitting PDF and EPUB docs)
-ONLY_HTML_DOCS = 1
-endif
-
 
 ######################################################################
 # Rust version
@@ -118,7 +113,7 @@ doc/version_info.html: $(D)/version_info.html.template $(MKFILE_DEPS) \
 GENERATED += doc/version.md doc/version_info.html
 
 ######################################################################
-# Docs, from rustdoc and sometimes pandoc & node
+# Docs, from rustdoc and sometimes pandoc
 ######################################################################
 
 doc/:
@@ -168,15 +163,13 @@ ifneq ($(ONLY_HTML_DOCS),1)
 DOC_TARGETS += doc/$(1).epub
 doc/$(1).epub: $$(D)/$(1).md | doc/
 	@$$(call E, pandoc: $$@)
-	$$(Q)$$(CFG_NODE) $$(D)/prep.js --highlight $$< | \
-	$$(CFG_PANDOC) $$(PANDOC_EPUB_OPTS) --output=$$@
+	$$(CFG_PANDOC) $$(PANDOC_EPUB_OPTS) $$< --output=$$@
 
 # PDF (md =(pandoc)=> tex =(pdflatex)=> pdf)
 DOC_TARGETS += doc/$(1).tex
 doc/$(1).tex: $$(D)/$(1).md doc/footer.tex doc/version.md | doc/
 	@$$(call E, pandoc: $$@)
-	$$(Q)$$(CFG_NODE) $$(D)/prep.js $$< | \
-	$$(CFG_PANDOC) $$(PANDOC_TEX_OPTS) --output=$$@
+	$$(CFG_PANDOC) $$(PANDOC_TEX_OPTS) $$< --output=$$@
 
 ifneq ($(NO_PDF_DOCS),1)
 ifeq ($$(SHOULD_BUILD_PDF_DOC_$(1)),1)

src/doc/README.md

@@ -4,10 +4,6 @@
 document converter, is required to generate docs as HTML from Rust's
 source code.
 
-[Node.js](http://nodejs.org/) is also required for generating HTML from
-the Markdown docs (reference manual, tutorials, etc.) distributed with
-this git repository.
-
 [po4a](http://po4a.alioth.debian.org/) is required for generating translated
 docs from the master (English) docs.
 
@@ -30,8 +26,8 @@ rustdoc --output-dir html-doc/ --output-format html ../src/libstd/path.rs
 
 # Additional notes
 
-To generate an HTML version of a doc from Markdown without having Node.js
-installed, you can do something like:
+To generate an HTML version of a doc from Markdown manually, you can do
+something like:
 
 ~~~~
 pandoc --from=markdown --to=html5 --number-sections -o rust.html rust.md