Issue 210: mtn diff should ignore mtn:manual_merge files

Reported by Stephen Leake, Jul 28, 2012

Steps to reproduce the problem:
-------------------------------

1. add a large (50 MB) text file 
2. run mtn diff; notice that it chokes 
3. add mtn:manual_merge to large file
4. run mtn diff

Expected result:
----------------
does not diff the manual_merge file, outputting a message about 
"has mtn:manual_merge attribute" instead.

Actual results:
---------------
still chokes (hangs, produces no output for a _very_ long time).


Output of `mtn version --full`:
-------------------------------
1.0

Comment 1 by Stephen Leake, Jul 28, 2012

Currently, diff only ignores files that are considered binary by 
file_io.cc guess_binary. But the user might have other reasons to 
exclude a file (such as it's too large, or it has a format that some 
other tool handles much better). Rather than having to specify 
--exclude every time, setting the mtn:manual_merge attribute should 
have that effect, just as that attribute excludes the file from 
internal merging.

Comment 2 by Stephen Leake, Aug 4, 2012

fixed in 09c2276fbcffdaca4bbb83d0f1fcefa76da15d12

Status: Fixed

monotone