add -e, was Re: What's cooking in git.git (Apr 2009, #02; Sun, 12)

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Hi,

On Sun, 12 Apr 2009, Junio C Hamano wrote:

> * js/add-edit (Wed Apr 8 23:30:24 2009 +0200) 1 commit
>  - git-add: introduce --edit (to edit the diff vs. the index)
> 
> I am Ok with the general idea, but the error detection needs to be more 
> robust than merely relying on --recount.

You mean something like saving an extra copy of the patch, and checking if 
common or removed lines were either removed or kept intact?

That might turn out to be _very_ tricky.

Example:

@@ <some numbers>
 common line
+added line
 common line
-removed line
 common line

Now, edit it, and come up with

@@ <some numbers>
 common line
+removed line
 common line

It is obvious what is meant, but is there a clear semantics a _computer_ 
could understand?  I do not think so.

If you had some other error checking in mind, please let me hear it.

Ciao,
Dscho

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