Switch to python3.

PR:		249779
Reported by:	swills@

textproc/google-ctemplate/Makefile

@@ -15,7 +15,7 @@ LICENSE_FILE=	${WRKSRC}/COPYING
 
 OPTIONS_DEFINE=	DOCS
 
-USES=		libtool pathfix pkgconfig python:2.7 shebangfix
+USES=		libtool pathfix pkgconfig python:build shebangfix
 GNU_CONFIGURE=	yes
 SHEBANG_FILES=	src/template-converter src/htmlparser/generate_fsm.py src/htmlparser/fsm_config.py
 USE_LDCONFIG=	yes

textproc/google-ctemplate/files/patch-src_htmlparser_fsm__config.py

@@ -0,0 +1,15 @@
+--- src/htmlparser/fsm_config.py.orig	2020-09-26 14:52:15 UTC
++++ src/htmlparser/fsm_config.py
+@@ -210,7 +210,11 @@ class FSMConfig(object):
+ 
+     self.sm['state'] = self.AddState
+     self.sm['condition'] = self.AddCondition
+-    execfile(filename, self.sm)
++
++    with open(filename) as f:
++        code = compile(f.read(), filename, 'exec')
++        exec(code, self.sm)
++
+     self.name = self.sm['name']
+     if not self.name.isalnum():
+       raise Exception("State machine name must consist of only alphanumeric"

textproc/google-ctemplate/files/patch-src_htmlparser_generate__fsm.py

@@ -0,0 +1,41 @@
+--- src/htmlparser/generate_fsm.py.orig	2020-09-26 14:51:40 UTC
++++ src/htmlparser/generate_fsm.py
+@@ -264,7 +264,7 @@ class FSMGenerateC(FSMGenerateAbstract):
+     state_table = {}
+ 
+     for state in self._config.states:
+-      state_table[state] = [default_state for col in xrange(255)]
++      state_table[state] = [default_state for col in range(255)]
+ 
+     # We process the transition in reverse order while updating the table.
+     for i_transition in range(len(self._config.transitions) - 1, -1, -1):
+@@ -281,7 +281,7 @@ class FSMGenerateC(FSMGenerateAbstract):
+     # Create the inner lists which map input characters to destination states.
+     for state in self._config.states:
+       transition_row = []
+-      for c in xrange(0, 255):
++      for c in range(0, 255):
+         transition_row.append('    /* %06s */ %s' % (repr(chr(c)),
+                                                      state_table[state][c]))
+ 
+@@ -306,17 +306,17 @@ class FSMGenerateC(FSMGenerateAbstract):
+   def Generate(self):
+     """Returns the generated the C include statements for the statemachine."""
+ 
+-    print '\n'.join((self._CreateHeader(),
++    print('\n'.join((self._CreateHeader(),
+                      self._CreateNumStates(),
+                      self._CreateStatesEnum(),
+                      self._CreateStatesExternal(),
+                      self._CreateStatesInternalNames(),
+-                     self._CreateTransitionTable()))
++                     self._CreateTransitionTable())))
+ 
+ 
+ def main():
+   if len(sys.argv) != 2:
+-    print "usage: generate_fsm.py config_file"
++    print("usage: generate_fsm.py config_file")
+     sys.exit(1)
+ 
+   config = FSMConfig()