comparison mercurial/tags.py @ 31993:bfb826c350d4

tags: introduce a function to return a valid fnodes list from revs

This will get used to compare tags between two set of revisions during a
transaction (pre and post heads). The end goal is to be able to track tags
movement in transaction hooks.

31992:3e47a40d7a7a

# Tags are written sorted by tag name.
#
# Tags associated with multiple changesets have an entry for each changeset.
# The most recent changeset (in terms of revlog ordering for the head
# setting it) for each tag is last.

def findglobaltags(ui, repo):
    '''Find global tags in a repo: return a tagsmap

    tagsmap: tag name to (node, hist) 2-tuples.

31993:bfb826c350d4

# Tags are written sorted by tag name.
#
# Tags associated with multiple changesets have an entry for each changeset.
# The most recent changeset (in terms of revlog ordering for the head
# setting it) for each tag is last.

def fnoderevs(ui, repo, revs):
    """return the list of '.hgtags' fnodes used in a set revisions

    This is returned as list of unique fnodes. We use a list instead of a set
    because order matters when it comes to tags."""
    unfi = repo.unfiltered()
    tonode = unfi.changelog.node
    nodes = [tonode(r) for r in revs]
    fnodes = _getfnodes(ui, repo, nodes[::-1]) # reversed help the cache
    fnodes = _filterfnodes(fnodes, nodes)
    return fnodes

def findglobaltags(ui, repo):
    '''Find global tags in a repo: return a tagsmap

    tagsmap: tag name to (node, hist) 2-tuples.