tests/test-convert-darcs.out

merge: allow smarter tool configuration

Add [merge-tool] hgrc section with:
 <tool>.executable = name or path (<tool>)
 <tool>.args = args with $local/base/other/output ($local $base $other)
 <tool>.priority = priority (default 0)
 <tool>.binary = handles binary (False)
 <tool>.symlink = handles symlinks (False)
 <tool>.checkconflict = check for conflict markers (False)
 <tool>.premerge = try internal simplemerge (True if not binary or symlink)

Four built-in tools: internal:{merge,local,other,fail}

Add [merge-patterns] section of the form:
 <pattern> = <tool>

Priority of settings is:
 HGMERGE
 merge-patterns
 ui:merge
 merge-tools by priority
 hgmerge, if it can be found

Changes:
 unsuccessful merges leave .orig files

% initialize darcs repo
Finished recording patch 'p0'
% branch and update
Finished recording patch 'p1.1'
% update source
Finished recording patch 'p1.2'
% merge branch
We have conflicts in the following files:
./a
Finished pulling and applying.
Finished recording patch 'p2'
initializing destination darcs-repo-hg repository
scanning source...
sorting...
converting...
3 p0
2 p1.2
1 p1.1
0 p2
o  3 "p2" files: a
|
o  2 "p1.1" files:
|
o  1 "p1.2" files: a b
|
o  0 "p0" files: a

7225b30cdf38257d5cc7780772c051b6f33e6d6b 644   a
1e88685f5ddec574a34c70af492f95b6debc8741 644   b