Check only once for dtl tools in configure.py

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_4_X@15892 a592a061-630c-0410-9148-cb99ea01b6c8

lib/configure.py

@@ -179,12 +179,21 @@ def checkViewer(description, progs, rc_entry = [], path = []):
     return checkProg(description, progs, rc_entry, path, not_found = 'auto')
 
 
-def checkLatex():
-    ''' Check latex, return lyx_check_config '''
+def checkDTLtools():
+    ''' Check whether DTL tools are available (Windows only) '''
     # Find programs! Returned path is not used now
     if ((os.name == 'nt' or sys.platform == 'cygwin') and
             checkProg('DVI to DTL converter', ['dv2dt']) != ['', ''] and
             checkProg('DTL to DVI converter', ['dt2dv']) != ['', '']):
+        dtl_tools = 'true'
+    else:
+        dtl_tools = 'false'
+    return dtl_tools
+
+
+def checkLatex(dtl_tools):
+    ''' Check latex, return lyx_check_config '''
+    if (dtl_tools):
         # Windows only: DraftDVI
         converter_entry = r'''\converter latex      dvi2       "%%"	"latex"
 \converter dvi2       dvi        "python -tt $$s/scripts/clean_dvi.py $$i $$o"	""'''
@@ -213,7 +222,7 @@ def checkLatex():
     return ''
 
 
-def checkFormatEntries():  
+def checkFormatEntries(dtl_tools):  
     ''' Check all formats (\Format entries) '''
     checkViewer('a Tgif viewer and editor', ['tgif'],
         rc_entry = [r'\Format tgif       obj     Tgif                   "" "%%"	"%%"'])
@@ -271,9 +280,7 @@ def checkFormatEntries():
     #
     checkViewer('a DVI previewer', ['xdvi', 'kdvi'],
         rc_entry = [r'\Format dvi        dvi     DVI                    D  "%%"	""'])
-    if ((os.name == 'nt' or sys.platform == 'cygwin') and
-            checkProg('DVI to DTL converter', ['dv2dt']) != ['', ''] and
-            checkProg('DTL to DVI converter', ['dt2dv']) != ['', '']):
+    if (dtl_tools):
         # Windows only: DraftDVI
         addToRC(r'\Format dvi2       dvi     DraftDVI               ""	""	""')
     #
@@ -747,6 +754,7 @@ Options:
     setEnviron()
     createDirectories()
     windows_style_tex_paths = checkTeXPaths()
+    dtl_tools = checkDTLtools()
     ## Write the first part of outfile
     writeToFile(outfile, '''# This file has been automatically generated by LyX' lib/configure.py
 # script. It contains default settings that have been determined by
@@ -756,8 +764,8 @@ Options:
 # override the values given here.
 ''')
     # check latex
-    LATEX = checkLatex()
-    checkFormatEntries()
+    LATEX = checkLatex(dtl_tools)
+    checkFormatEntries(dtl_tools)
     checkConverterEntries()
     (chk_linuxdoc, bool_linuxdoc, linuxdoc_cmd) = checkLinuxDoc()
     (chk_docbook, bool_docbook, docbook_cmd) = checkDocBook()