Correct optimization from 3464f5e77f34; add a test.
If there are two (or more) heads that point to the same .hgtags
node, we can safely skip parsing the file in all but the last head.
(In 3464f5e77f34, we were parsing the file in the first head and
skipping all the others.)
adding a
making snapshot of 0 files from rev 000000000000
making snapshot of 1 files from working dir
diff -Nr a.000000000000/a a/a
0a1
> a
making snapshot of 0 files from rev 000000000000
making snapshot of 1 files from working dir
diffing a.000000000000 a
hg falabala [OPT]... [FILE]...
use 'echo' to diff repository (or selected files)
Show differences between revisions for the specified
files, using the 'echo' program.
When two revision arguments are given, then changes are
shown between those revisions. If only one revision is
specified then that revision is compared to the working
directory, and, when no revisions are specified, the
working directory files are compared to its parent.
options:
-o --option pass option to comparison program
-r --rev revision
-I --include include names matching the given patterns
-X --exclude exclude names matching the given patterns
making snapshot of 1 files from rev e27a2475d60a
making snapshot of 1 files from rev 5e49ec8d3f05
diffing a.e27a2475d60a a.5e49ec8d3f05
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
making snapshot of 1 files from rev 5e49ec8d3f05
making snapshot of 1 files from working dir
diffing a.5e49ec8d3f05 a
diff-like tools yield a non-zero exit code