Enable python3 support

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>

README.asciidoc

@@ -52,10 +52,7 @@ the same commits:
 Remember to run `git gc --aggressive` after cloning a repository, especially if
 it's a big one. Otherwise lots of space will be wasted.
 
-The newest supported version of Mercurial is 6.1 but only through Python 2. The
+The newest supported version of Mercurial is 6.2, the oldest one is 2.4.
-oldest one is 2.4.
-
-Support for Python 3 is ready, but will be released in the next version soon.
 
 === Pushing branches ===
 

git-remote-hg

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 #
 # Copyright (c) 2012 Felipe Contreras
 #
@@ -26,6 +26,14 @@ import atexit
 import hashlib
 import time as ptime
 
+if sys.version_info[0] >= 3:
+    from urllib.parse import urlparse, urljoin
+    from urllib.parse import quote as urlquote, unquote as urlunquote
+
+    ferr = sys.stderr.buffer
+    fin = sys.stdin.buffer
+
+else:
     from urlparse import urlparse, urljoin
     from urllib import quote as urlquote, unquote as urlunquote
 
@@ -33,6 +41,9 @@ from urllib import quote as urlquote, unquote as urlunquote
     reload(sys)
     sys.setdefaultencoding('utf-8')
 
+    ferr = sys.stderr
+    fin = sys.stdin
+
 #
 # If you want to see Mercurial revisions as Git commit notes:
 # git config core.notesRef refs/notes/hg
@@ -223,7 +234,7 @@ class Parser:
         self.line = self.get_line()
 
     def get_line(self):
-        return sys.stdin.readline().decode().strip()
+        return fin.readline().decode().strip()
 
     def __getitem__(self, i):
         return self.line.split()[i]
@@ -253,7 +264,7 @@ class Parser:
             return None
         i = self.line.index(' ') + 1
         size = int(self.line[i:])
-        return sys.stdin.read(size)
+        return fin.read(size)
 
     def get_author(self):
         ex = None
@@ -416,7 +427,7 @@ def get_repo(url, alias):
         myui = ui.ui()
 
     myui.setconfig(b'ui', b'interactive', b'off')
-    myui.fout = sys.stderr
+    myui.fout = ferr
 
     if get_config_bool('remote-hg.insecure'):
         myui.setconfig(b'web', b'cacerts', b'')

test/bidi.t

@@ -17,7 +17,7 @@ then
 	test_done
 fi
 
-if ! python2 -c 'import mercurial' > /dev/null 2>&1
+if ! python -c 'import mercurial' > /dev/null 2>&1
 then
 	skip_all='skipping remote-hg tests; mercurial not available'
 	test_done

test/hg-git.t

@@ -17,16 +17,16 @@ then
 	test_done
 fi
 
-if ! python2 -c 'import mercurial' > /dev/null 2>&1
+if ! python -c 'import mercurial' > /dev/null 2>&1
 then
 	skip_all='skipping remote-hg tests; mercurial not available'
 	test_done
 fi
 
-if python2 -c 'import hggit' > /dev/null 2>&1
+if python -c 'import hggit' > /dev/null 2>&1
 then
 	hggit=hggit
-elif python2 -c 'import hgext.git' > /dev/null 2>&1
+elif python -c 'import hgext.git' > /dev/null 2>&1
 then
 	hggit=hgext.git
 else

test/main.t

@@ -17,7 +17,7 @@ then
 	test_done
 fi
 
-if ! python2 -c 'import mercurial' > /dev/null 2>&1
+if ! python -c 'import mercurial' > /dev/null 2>&1
 then
 	skip_all='skipping remote-hg tests; mercurial not available'
 	test_done

tools/check-versions

@@ -102,7 +102,7 @@ class Component
   def build
     Dir.chdir(dir) do
       targets = %w[build_py build_ext].map { |e| [e, '--build-lib', "#{$builddir}/python"] }
-      run_cmd %w[python2 setup.py --quiet] + targets.flatten
+      run_cmd %w[python setup.py --quiet] + targets.flatten
     end
   end
 

tools/versions.txt

@@ -40,3 +40,5 @@ hg:5.5 hggit:0.9.0 dulwich:0.19.15 # 2020_08
 hg:5.6 hggit:0.9.0 dulwich:0.19.15 # 2020_10
 
 hg:5.7 hggit:0.10.0 dulwich:0.19.16 # 2021_01
+
+hg:5.8 hggit:0.10.1 dulwich:0.20.0 # 2021_05 # python3