This patch add the flag --look-for-replaces to amend-record, record and whatsnew commands, to automatically detect possible replaces. It implements the options 2 and 3 explained in http://darcs.net/Using/LookForReplaces
It shares many spots in the code with the --look-for-moves patch and needs to be mixed with it once the --look-for-moves patch is accepted.
1 patch for repository http://darcs.net/screened:

Sun Sep 15 21:12:48 ART 2013  Jose Luis Neder <jlneder@gmail.com>
  * resolve issue2209: Automatically detect replace
  This patch add the flag --look-for-replaces to amend-record, record and whatsnew commands, to automatically detect possible replaces. It implements the options 2 and 3 explained in http://darcs.net/Using/LookForReplaces

Attachments

• patch-preview.txt
• resolve-issue2209_-automatically-detect-replace.dpatch
• unnamed

I added the missing util.hs file.
1 patch for repository http://darcs.net/screened:

Fri Sep 20 12:28:58 ART 2013  Jose Luis Neder <jlneder@gmail.com>
  * resolve issue2209: Automatically detect replace
  This patch add the flag --look-for-replaces to amend-record, record and whatsnew commands, to automatically detect possible replaces. It implements the options 2 and 3 explained in http://darcs.net/Using/LookForReplaces

Attachments

• patch-preview.txt
• resolve-issue2209_-automatically-detect-replace.dpatch
• unnamed

Please provide a shell test that checks the complete behaviour of --look-for-replace 
(instead of linking to http://darcs.net/Using/LookForReplaces ). This is a more 
convincing way of showing that the implementation follows some specificacion. 

Then I think you can remove the second sentence of the patch's long comment (and wrap 
it at 72 characters).

Also please provide a copyright header for Darcs.Repository.Util, and haddock for 
getReplaces.

Added tests. One failing test when trying to amend an addfile patch
with a forced replace.
Added functionality to skip the use of the index when "--ignore-times"
and "--look-for-replaces" are used at the same time.
Added copyright to Darcs.Repository.Util.
Added haddock for getReplaces.
1 patch for repository http://darcs.net/screened:

Tue Sep 24 14:21:11 ART 2013  Jose Luis Neder <jlneder@gmail.com>
  * resolve issue2209: Automatically detect replace
  This patch add the flag --look-for-replaces to amend-record, record and
  whatsnew commands, to automatically detect possible replaces.

Attachments

• patch-preview.txt
• resolve-issue2209_-automatically-detect-replace.dpatch
• unnamed

I have amended Jose's patch so that it cleanly applies on top of
screened + look-for-moves.

I have added a second failing test, which shows that look-for-replaces
does not see the moved files detected by look-for-moves.

1 patch for repository http://darcs.net:

Fri Jan 10 01:20:13 ART 2014  Jose Luis Neder <jlneder@gmail.com>
  * resolve issue2209: Automatically detect replace
  This patch add the flag --look-for-replaces to amend-record, record and
  whatsnew commands, to automatically detect possible replaces.

Attachments

• patch-preview.txt
• resolve-issue2209_-automatically-detect-replace.dpatch
• unnamed

Self-accepting.