comparison mercurial/revset.py @ 26102:5618858dce26

revsets: makes follow() supports file patterns (issue4757) (BC)

Before this patch, follow only supports full, exact filenames.
This patch makes follow argument to be treated like file
pattern same way like log treats their arguments.

It preserves current behaviour of follow() matching paths
relative to the repository root by default.

26100:5706d130ec16

    An alias for limit().
    """
    return limit(repo, subset, x)

def _follow(repo, subset, x, name, followfirst=False):
    l = getargs(x, 0, 1, _("%s takes no arguments or a filename") % name)
    c = repo['.']
    if l:
        x = getstring(l[0], _("%s expected a filename") % name)
        if x in c:
            cx = c[x]
            s = set(ctx.rev() for ctx in cx.ancestors(followfirst=followfirst))
            # include the revision responsible for the most recent version
            s.add(cx.introrev())
        else:
            return baseset()
    else:
        s = _revancestors(repo, baseset([c.rev()]), followfirst)

    return subset & s

def follow(repo, subset, x):
    """``follow([file])``
    An alias for ``::.`` (ancestors of the working directory's first parent).
    If a filename is specified, the history of the given file is followed,
    including copies.
    """
    return _follow(repo, subset, x, 'follow')

def _followfirst(repo, subset, x):
    # ``followfirst([file])``
    # Like ``follow([file])`` but follows only the first parent of
    # every revision or file revision.
    return _follow(repo, subset, x, '_followfirst', followfirst=True)

def getall(repo, subset, x):
    """``all()``
    All changesets, the same as ``0:tip``.

26102:5618858dce26

    An alias for limit().
    """
    return limit(repo, subset, x)

def _follow(repo, subset, x, name, followfirst=False):
    l = getargs(x, 0, 1, _("%s takes no arguments or a pattern") % name)
    c = repo['.']
    if l:
        x = getstring(l[0], _("%s expected a pattern") % name)
        matcher = matchmod.match(repo.root, repo.getcwd(), [x],
                                 ctx=repo[None], default='path')

        s = set()
        for fname in c:
            if matcher(fname):
                fctx = c[fname]
                s = s.union(set(c.rev() for c in fctx.ancestors(followfirst)))
                # include the revision responsible for the most recent version
                s.add(fctx.introrev())
    else:
        s = _revancestors(repo, baseset([c.rev()]), followfirst)

    return subset & s

def follow(repo, subset, x):
    """``follow([pattern])``
    An alias for ``::.`` (ancestors of the working directory's first parent).
    If pattern is specified, the histories of files matching given
    pattern is followed, including copies.
    """
    return _follow(repo, subset, x, 'follow')

def _followfirst(repo, subset, x):
    # ``followfirst([pattern])``
    # Like ``follow([pattern])`` but follows only the first parent of
    # every revisions or files revisions.
    return _follow(repo, subset, x, '_followfirst', followfirst=True)

def getall(repo, subset, x):
    """``all()``
    All changesets, the same as ``0:tip``.