view tests/test-issue352 @ 9725:3f522d2fa633

diff: add --inverse option

Most of the time, one can reverse a diff by swapping the revisions passed with
-r but it happens that if you use the global -R, and diff against the tip of
the current repo, you can't swap the revisions. One use-case for that is
reviewing changes from a bundle before unbundling. One could also pipe the
output of `hg diff` to a command line filter that reverses the diff, but that
would remove the benefit from color diffs. Therefore, having an option in
`hg diff` to reverse a diff is a good thing.

The option flag selection was tricky. GNU patch uses -R/--reverse but -R is
already used as a global option and --reverse would make --rev ambiguous.

#!/bin/sh
# http://mercurial.selenic.com/bts/issue352

"$TESTDIR/hghave" eol-in-paths || exit 80

hg init foo
cd foo

A=`printf 'he\rllo'`

echo foo > "$A"
hg add
hg ci -A -m m
rm "$A"

echo foo > "hell
o"
hg add
hg ci -A -m m

echo foo > "$A"
hg debugwalk

exit 0