Fix bug #6873: Shell execution of \nonstopmode tried when no latex binary present

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_6_X@35351 a592a061-630c-0410-9148-cb99ea01b6c8

lib/configure.py

@@ -921,10 +921,13 @@ def checkTeXAllowSpaces():
     if lyx_check_config:
         print "Checking whether TeX allows spaces in file names... ",
         writeToFile('a b.tex', r'\message{working^^J}' )
-        if os.name == 'nt':
-            latex_out = cmdOutput(LATEX + r""" "\nonstopmode\input{\"a b\"}" """)
+        if LATEX != '':
+            if os.name == 'nt':
+                latex_out = cmdOutput(LATEX + r""" "\nonstopmode\input{\"a b\"}" """)
+            else:
+                latex_out = cmdOutput(LATEX + r""" '\nonstopmode\input{"a b"}' """)
         else:
-            latex_out = cmdOutput(LATEX + r""" '\nonstopmode\input{"a b"}' """)
+            latex_out = ''
         if 'working' in latex_out:
             print 'yes'
             tex_allows_spaces = 'true'

status.16x

@@ -128,6 +128,9 @@ What's new
 - Fix parsing of commands sent through the lyxserver, such that they don't
   need to be terminated by a newline character (bug 6868).
 
+- Don't try to blindly execute the latex command if no latex binary is
+  available (bug 6873).
+
 
 * DOCUMENTATION AND LOCALIZATION