Make preview skript Python-3 compatible.

diff --git a/lib/scripts/lyxpreview_tools.py b/lib/scripts/lyxpreview_tools.py
index 91cc4d6ab19a9cb719f9208df19f71df70ee3d19..2f8c2f8d643a7b13a48ea00645d96d5e52834591 100644 (file)
--- a/lib/scripts/lyxpreview_tools.py
+++ b/lib/scripts/lyxpreview_tools.py
@@ -219,16 +219,16 @@ def write_metrics_info(metrics_info, metrics_file):
 # Reads a .tex files and create an identical file but only with
 # pages whose index is in pages_to_keep
 def filter_pages(source_path, destination_path, pages_to_keep):
-    def_re = re.compile(r"(\\newcommandx|\\renewcommandx|\\global\\long\\def)(\\[a-zA-Z]+)(.+)")
-    source_file = open(source_path, "r")
-    destination_file = open(destination_path, "w")
+    def_re = re.compile(rb"(\\newcommandx|\\renewcommandx|\\global\\long\\def)(\\[a-zA-Z]+)(.+)")
+    source_file = open(source_path, "rb")
+    destination_file = open(destination_path, "wb")
 
     page_index = 0
     skip_page = False
     macros = []
     for line in source_file:
         # We found a new page
-        if line.startswith("\\begin{preview}"):
+        if line.startswith(b"\\begin{preview}"):
             page_index += 1
             # If the page index isn't in pages_to_keep we don't copy it
             skip_page = page_index not in pages_to_keep
@@ -240,12 +240,12 @@ def filter_pages(source_path, destination_path, pages_to_keep):
                 macroname = match.group(2)
                 if not macroname in macros:
                     macros.append(macroname)
-                    if definecmd == "\\renewcommandx":
-                        line = line.replace(definecmd, "\\newcommandx")
+                    if definecmd == b"\\renewcommandx":
+                        line = line.replace(definecmd, b"\\newcommandx")
             destination_file.write(line)
 
         # End of a page, we reset the skip_page bool
-        if line.startswith("\\end{preview}"):
+        if line.startswith(b"\\end{preview}"):
             skip_page = False
 
     destination_file.close()