Add support for the xindex index processor

This is a modern alternative for makeindex that is fully unicode-aware
and written in lua.

As opposed to xindy, it is more lightweight and actively maintained.

The program is still in a rather early stage of development, so we do
not propose this as default.

This relies on xindex 0.22 (about to be released) to function properly.

lib/configure.py

@@ -1299,7 +1299,7 @@ def checkOtherEntries():
         rc_entry = [ r'\jbibtex_command "automatic"' ],
         alt_rc_entry = [ r'\jbibtex_alternatives "%%"' ])
     checkProgAlternatives('available index processors',
-        ['texindy $$x -t $$b.ilg', 'makeindex -c -q', 'xindy -M texindy $$x -t $$b.ilg'],
+        ['texindy $$x -t $$b.ilg', 'xindex -l $$lcode', 'makeindex -c -q', 'xindy -M texindy $$x -t $$b.ilg'],
         rc_entry = [ r'\index_command "%%"' ],
         alt_rc_entry = [ r'\index_alternatives "%%"' ])
     checkProg('an index processor appropriate to Japanese',

src/Converter.cpp

@@ -481,8 +481,7 @@ Converters::RetVal Converters::convert(Buffer const * buffer,
 		runparams.bibtex_command = bp.bibtexCommand();
 		runparams.index_command = (bp.index_command == "default") ?
 			string() : bp.index_command;
-		runparams.document_language = bp.language->babel();
+		runparams.document_language = bp.language->lang();
-		runparams.xindy_language = bp.language->xindy();
 		// Some macros rely on font encoding
 		runparams.main_fontenc = bp.main_font_encoding();
 		runparams.only_childbibs = !bp.useBiblatex()

src/LaTeX.cpp

@@ -23,6 +23,7 @@
 #include "LyX.h"
 #include "DepTable.h"
 #include "Encoding.h"
+#include "Language.h"
 
 #include "support/debug.h"
 #include "support/convert.h"
@@ -542,12 +543,14 @@ int LaTeX::runMakeIndex(string const & f, OutputParams const & rp,
 	if (!rp.index_command.empty())
 		tmp = rp.index_command;
 
+	Language const * doc_lang = languages.getLanguage(rp.document_language);
+	
 	if (contains(tmp, "$$x")) {
 		// This adds appropriate [te]xindy options
 		// such as language and codepage (for the
 		// main document language/encoding) as well
 		// as input markup (latex or xelatex)
-		string xdyopts = rp.xindy_language;
+		string xdyopts = doc_lang ? doc_lang->xindy() : string();
 		if (!xdyopts.empty())
 			xdyopts = "-L " + xdyopts;
 		if (rp.isFullUnicode() && rp.encoding->package() == Encoding::none) {
@@ -580,7 +583,10 @@ int LaTeX::runMakeIndex(string const & f, OutputParams const & rp,
 		"idx file has been made, running index processor ("
 		<< tmp << ") on file " << f);
 
-	tmp = subst(tmp, "$$lang", rp.document_language);
+	if (doc_lang) {
+		tmp = subst(tmp, "$$lang", doc_lang->babel());
+		tmp = subst(tmp, "$$lcode", doc_lang->code());
+	}
 	if (rp.use_indices) {
 		tmp = lyxrc.splitindex_command + " -m " + quoteName(tmp);
 		LYXERR(Debug::LATEX,

src/OutputParams.h

@@ -129,7 +129,7 @@ public:
 	 */
 	Font const * local_font;
 
-	/** Document language babel name
+	/** Document language lyx name
 	 */
 	std::string document_language;
 
@@ -200,9 +200,6 @@ public:
 	*/
 	std::string index_command;
 
-	/// The Xindy language module
-	std::string xindy_language;
-
 	/** Hyperref driver
 	*/
 	std::string hyperref_driver;