bug#4451: 23.1; EOL problems with vc-diff and cygwin

[Reiner Steib <reiner.steib@gmx.de>]

Eli Zaretskii <eliz@gnu.org> wrote:

>> From: Reiner Steib <reinersteib+gmane@imap.cc>
>>
>> on Windows (with diff.exe from cygwin), I get annoying `^M' characters
>> in the diff output (see attached file vc-diff-2.output) when using
>> `C-x v =' (`vc-diff') on a file with Unix-style EOL.
>
> If you diff the same two files from the shell prompt using the same
> diff.exe, what kind of EOLs do you get in the output?  Is the result
> similar to what you see in vc-diff?

I don't diff two files, but I use CVS on a single file.  So I guess  
you mean the "cvs diff" output.  The output of "cvs diff" in cygwin's  
bash has DOS line endings, no duplicate "^M", see below.

The saved Emacs buffer from vc-diff (vc-diff-2.output) has "^M^M$"  
whereas the buffer from cvs-mode-diff (cvs-mode-diff.output) has  
"^M$".  I checked the original files now, to avoid some mail transfer  
mangling.

Bye, Reiner


$ cvs diff K3.xml > /tmp/cygwin-cvs-diff.output

$ file /tmp/cygwin-cvs-diff.output
/tmp/cygwin-cvs-diff.output: RCS/CVS diff output text

$ tac /tmp/cygwin-cvs-diff.output | file -
/dev/stdin: ASCII text, with CRLF line terminators

$ cvs diff SK3.xml | cat --show-all
Aaaaa: AA1.aaa^M$
===================================================================^M$
AAA aaaa: A:\a\A\Aa\A/A/A/A/Aa/K3.xml,v^M$
aaaaaaaaaa aaaaaaaa 1.1^M$
aaaa -a -a1.1 AA1.aaa^M$
--- K3.xml^I11 Aaa 1111 11:11:11 -1111^I1.1^M$
+++ K3.xml^I11 Aaa 1111 11:11:11 -1111^M$
@@ -1,1 +1,1 @@^M$
  <?aaa aaaaaaa='1.1'^I^M$
   aaaaaaaa='AAA-1'^I^M$
  ?>^I^M$
-<aaaaaa aaaa='AA1'^I^M$
+<aaaaaa aaaa='AA1_aaaa_aaa11111'^I^M$
   aaaaaaa='1.1.1'^I^M$
   aaaaaa-aaaaaaa='1.1.1'^I^M$
   aaaaa='aaaa'^I^M$
@@ -1111,1 +1111,11 @@^M$
   aaaaaAaaa='11/1111'^I^M$
   aaAaaaaAaaaaaaaaa='Aa'^I^M$
   aaAaaaaaaaAaaaaaaaaa='Aa'^I^M$
+ />^I^M$
+<aaaaaaaaAaaaaaAaaa aaaaa='aaaa://aaa.aaa.aaa/aaa/AaaaAaaaa/AAA'^I^M$
+ aaaaaAA='1111111'^I^M$
+ Aaaaaaa='aaaa'^I^M$
+ aaAaaaaa='Aaaaaa'^I^M$
+ aaaaaAaaa='AAAA_Aaaaaa_AaaaAaaaaa'^I^M$
+ aaaaaaaa='aaaaaa'^I^M$
+ aaaaaaaa='aaaa'^I^M$
+ aaaaa='aaaaa'^I^M$
+ aaaaaaaaAaaa=''^I^M$
+ aaa='AAA 11.111'^I^M$
+ aaaaaAaaa='1/1111'^I^M$
+ aaAaaaaAaaaaaaaaa='Aa'^I^M$
+ aaAaaaaaaaAaaaaaaaaa='Aaa'^I^M$
   /></AaaaaaaaAaaaaaAaaaaaa>^M$
  <AaaaAaaaaaa aaaaa='aaaa://aaa.aaa.aaa/aaa/AaaaAaaaa/AAA'^I^M$
   >^I^M$