Rebase will throw away log messages

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Hello,

The thread "[PATCH] have merge put FETCH_HEAD data in commit message" reminded 
me of a test I wanted to do after Junio told me off ;-) for putting "--- 
>8 ---" in a log message.  In particular, the objection was that the "---" 
made git-am think the message was at an end.  This combined with the talk of 
git-am in the above thread made me remember that I had more to say about 
git-am being so picky about what it would allow in the log message.

I just made a repository that looked like this:

 * -- * (somebranch)
  \
   X (master)

Then I did a rebase, while on master

 $ git rebase somebranch

Great; rebase worked as expected in terms of reorganising the repository:

 * -- * (somebranch)
       \
        X' (master)

The only thing is this change in the log.  Here is X before the rebase:

commit 3030bf9e3f8434dc3634e768f5e0bd54659bed48
Author: Andy Parkins <andyparkins@xxxxxxxxx>
Date:   Fri Mar 23 14:49:24 2007 +0000

    Short log
    
    Long log; line following this has dashes in it
    
    ---
    
    This is after the dashes.

Here is X after the rebase:

commit 575e0c226117d687ae9ba1c3c6b4c8e35cbe5ab7
Author: Andy Parkins <andyparkins@xxxxxxxxx>
Date:   Fri Mar 23 14:49:24 2007 +0000

    Short log
    
    Long log; line following this has dashes in it

Oh dear.  Half the log message has gone missing.

Of course the reason will be obvious to you clever chaps: git-rebase uses 
git-am to do the work and the "---" line in the original message causes it to 
drop into "diff starts here mode", and then everything until the "diff --git" 
line is ignored.

Surely git-am needs a better way of detecting the end of the log that that? 

Something more unique than "---" would be a start; "--- [end of log message]" 
sort of thing.

Although they aren't liked on the git list - emails with the different parts 
as different attachments would be a much more reliable input for git-am for 
use in git-rebase.



Andy
-- 
Dr Andy Parkins, M Eng (hons), MIET
andyparkins@xxxxxxxxx
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