python script to generate proto3 definitions

.gitignore

@@ -4,3 +4,4 @@ build/
 s2clientprotocol/__init__.py
 dist/
 s2clientprotocol.egg-info/
+/s2clientprotocol_proto3

convert_proto3.py

@@ -0,0 +1,39 @@
+#!/usr/bin/python3
+import glob,os
+
+# this will create a folder "s2clientprotocol_proto3" with the converted proto3 definition files
+# just for current .proto files, it is not a generic proto2 to proto3 converter!
+def convert_proto3():
+    files = glob.glob("s2clientprotocol/*.proto")
+
+    out_dir = "s2clientprotocol_proto3"
+
+    if not os.path.exists(out_dir):
+        os.makedirs(out_dir)
+
+    for fle in files:   
+        with open(fle) as f:
+            outf = open(out_dir +"/" + fle[17:], "w");
+            text = f.readlines()
+            prevline = ""
+
+            for line in text:   
+
+                if ( line.strip().find("optional ") == 0):  # remove optional 
+                    outf.write(line.replace("optional ","",1))
+                elif (line.find("syntax =") == 0):          # change version declaration
+                    outf.write('syntax = "proto3";\n')
+                else:                                       # add dummy element to enum with starting value 0
+                    enumpos = prevline.find("enum ")        # for correct indentation
+                    if (prevline.strip().find("enum ") == 0 and 
+                        line[line.find("=")+1:line.find(";")].strip() == "1"):
+                        outf.write((" "*enumpos) +"  "+ prevline.strip().split()[1]+"_UNSET = 0;\n" )
+                        outf.write(line)
+                    else:
+                        outf.write(line)
+                prevline = line
+            outf.close()
+
+
+
+convert_proto3()