diff mercurial/patch.py @ 38332:7b12a2d2eedc

py3: ditch email.parser.BytesParser which appears to be plain crap

As I said before, BytesParser is a thin wrapper over the unicode Parser,
and it's too thin to return bytes back. Today, I found it does normalize
newline characters to '\n's thanks to the careless use of TextIOWrapper.

So, this patch replaces BytesParser with Parser + TextIOWrapper, and fix
newline handling. Since I don't know what's the least bad encoding strategy
here, I just copied it from BytesParser.

I've moved new parse() function from pycompat, as it is no longer a trivial
wrapper.

--- a/mercurial/patch.py	Sat Jun 16 17:56:37 2018 +0900
+++ b/mercurial/patch.py	Sat Jun 16 19:31:07 2018 +0900
@@ -112,7 +112,7 @@
             cur.append(line)
         c = chunk(cur)
 
-        m = pycompat.emailparser().parse(c)
+        m = mail.parse(c)
         if not m.is_multipart():
             yield msgfp(m)
         else:
@@ -230,7 +230,7 @@
 
     data = {}
 
-    msg = pycompat.emailparser().parse(fileobj)
+    msg = mail.parse(fileobj)
 
     subject = msg[r'Subject'] and mail.headdecode(msg[r'Subject'])
     data['user'] = msg[r'From'] and mail.headdecode(msg[r'From'])