view tests/test-parents.out @ 5137:2be225ea5722

extdiff: do single file diffs from the wc with no copy

Extdiff was always making a temporary directory and copying files even when not required. This change makes extdiff avoid the copy when diffing a single file that lives in the wc. This lets external diff tools edit the working copy file directly. It also lets other extensions resuse the functions in extdiff and get in-place diffs.

% no working directory
adding a
adding b
% hg parents
changeset:   2:6cfac479f009
tag:         tip
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     b

% hg parents a
changeset:   0:b6a1406d8886
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     ab

% hg parents -r 2
changeset:   1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     a

% hg parents -r 2 a
changeset:   0:b6a1406d8886
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     ab

% hg parents -r 2 ../a
abort: ../a not under root
% cd dir; hg parents -r 2 ../a
changeset:   0:b6a1406d8886
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     ab

% hg parents -r 2 path:a
changeset:   0:b6a1406d8886
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     ab

% hg parents -r 2 glob:a
abort: can only specify an explicit file name