comparison mercurial/patch.py @ 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.

9724:40ef3bf3e04a

    if node2 is None, compare node1 with working directory.'''

    if opts is None:
        opts = mdiff.defaultopts

    if not node1:
        node1 = repo.dirstate.parents()[0]

    def lrugetfilectx():
        cache = {}
        order = []

9725:3f522d2fa633

    if node2 is None, compare node1 with working directory.'''

    if opts is None:
        opts = mdiff.defaultopts

    if not node1 and not node2:
        node1 = repo.dirstate.parents()[0]

    def lrugetfilectx():
        cache = {}
        order = []