* configure.py: add test for luatex version.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@38050 a592a061-630c-0410-9148-cb99ea01b6c8

lib/configure.py

@@ -426,6 +426,39 @@ def checkLatex(dtl_tools):
     return ''
 
 
+def checkLuatex():
+    ''' Check if luatex is there and usable '''
+    path, LUATEX = checkProg('LuaTeX', ['lualatex $$i'])
+    path, DVILUATEX = checkProg('LuaTeX (DVI)', ['dvilualatex $$i'])
+    if LUATEX != '':
+    # luatex binary is there
+        msg = "checking if LuaTeX is usable ..."
+        # Check if luatex is usable
+        writeToFile('luatest.tex', '''
+\\nonstopmode\\documentclass{minimal}
+\\usepackage{fontspec}
+\\begin{document}
+.
+\\end{document}
+''')
+        # run lualatex on luatest.tex and check result
+        luatest = cmdOutput(LUATEX + ' luatest.tex')
+        if luatest.find('XeTeX is required to compile this document') != -1:
+            # fontspec/luatex too old! We do not support this version.
+            logger.info(msg + ' no (probably not recent enough)')
+        elif luatest.find('! LaTeX Error: File `fontspec.sty\' not found') != -1:
+            # fontspec missing
+            logger.info(msg + ' no (missing fontspec)')
+        else:
+            # working luatex
+            logger.info(msg + ' yes')
+            addToRC(r'\converter luatex      pdf5       "%s"	"latex=lualatex"' % LUATEX)
+            if DVILUATEX != '':
+                addToRC(r'\converter luatex      dvi3        "%s"	"latex=lualatex"' % DVILUATEX)   
+        # remove temporary files
+        removeFiles(['luatest.tex', 'luatest.log'])
+
+
 def checkModule(module):
     ''' Check for a Python module, return the status '''
     msg = 'checking for "' + module + ' module"... '
@@ -600,11 +633,7 @@ def checkConverterEntries():
     checkProg('XeTeX', ['xelatex $$i'],
         rc_entry = [ r'\converter xetex      pdf4       "%%"	"latex=xelatex"' ])
 
-    checkProg('LuaTeX', ['lualatex $$i'],
-        rc_entry = [ r'\converter luatex      pdf5       "%%"	"latex=lualatex"' ])
-
-    checkProg('LuaTeX (DVI)', ['dvilualatex $$i'],
-        rc_entry = [ r'\converter luatex      dvi3        "%%"	"latex=lualatex"' ])
+    checkLuatex()
     
     ''' If we're running LyX in-place then tex2lyx will be found in
             ../src/tex2lyx. Add this directory to the PATH temporarily and