mercurial/tagmerge.py

45941:346af7687c6f

hexnullid = hex(nullid)


def readtagsformerge(ui, repo, lines, fn=b'', keeplinenums=False):
    '''read the .hgtags file into a structure that is suitable for merging

    Depending on the keeplinenums flag, clear the line numbers associated
    with each tag. This is done because only the line numbers of the first
    parent are useful for merging.
    '''
    filetags = tagsmod._readtaghist(
        ui, repo, lines, fn=fn, recode=None, calcnodelines=True
    )[1]
    for tagname, taginfo in filetags.items():
        if not keeplinenums:

                el[1] = None
    return filetags


def grouptagnodesbyline(tagnodes):
    '''
    Group nearby nodes (i.e. those that must be written next to each other)

    The input is a list of [node, position] pairs, corresponding to a given tag
    The position is the line number where the node was found on the first parent
    .hgtags file, or None for those nodes that came from the base or the second

    groups of nodes that must be written next to each other because their
    positions are consecutive or have no position preference (because their
    position is None).

    The result is a list of [position, [consecutive node list]]
    '''
    firstlinenum = None
    for hexnode, linenum in tagnodes:
        firstlinenum = linenum
        if firstlinenum is not None:
            break

            prevlinenum = linenum
    return groupednodes


def writemergedtags(fcd, mergedtags):
    '''
    write the merged tags while trying to minimize the diff to the first parent

    This function uses the ordering info stored on the merged tags dict to
    generate an .hgtags file which is correct (in the sense that its contents
    correspond to the result of the tag merge) while also being as close as
    possible to the first parent's .hgtags file.
    '''
    # group the node-tag pairs that must be written next to each other
    for tname, taglist in list(mergedtags.items()):
        mergedtags[tname] = grouptagnodesbyline(taglist)

    # convert the grouped merged tags dict into a format that resembles the

    mergedtagstring = b'\n'.join([tags for rank, tags in finaltags if tags])
    fcd.write(mergedtagstring + b'\n', fcd.flags())


def singletagmerge(p1nodes, p2nodes):
    '''
    merge the nodes corresponding to a single tag

    Note that the inputs are lists of node-linenum pairs (i.e. not just lists
    of nodes)
    '''
    if not p2nodes:
        return p1nodes
    if not p1nodes:
        return p2nodes

    # whole list of lr nodes
    return lrnodes + hrnodes[commonidx:]


def merge(repo, fcd, fco, fca):
    '''
    Merge the tags of two revisions, taking into account the base tags
    Try to minimize the diff between the merged tags and the first parent tags
    '''
    ui = repo.ui
    # read the p1, p2 and base tags
    # only keep the line numbers for the p1 tags
    p1tags = readtagsformerge(
        ui, repo, fcd.data().splitlines(), fn=b"p1 tags", keeplinenums=True

45942:89a2afe31e82

hexnullid = hex(nullid)


def readtagsformerge(ui, repo, lines, fn=b'', keeplinenums=False):
    """read the .hgtags file into a structure that is suitable for merging

    Depending on the keeplinenums flag, clear the line numbers associated
    with each tag. This is done because only the line numbers of the first
    parent are useful for merging.
    """
    filetags = tagsmod._readtaghist(
        ui, repo, lines, fn=fn, recode=None, calcnodelines=True
    )[1]
    for tagname, taginfo in filetags.items():
        if not keeplinenums:

                el[1] = None
    return filetags


def grouptagnodesbyline(tagnodes):
    """
    Group nearby nodes (i.e. those that must be written next to each other)

    The input is a list of [node, position] pairs, corresponding to a given tag
    The position is the line number where the node was found on the first parent
    .hgtags file, or None for those nodes that came from the base or the second

    groups of nodes that must be written next to each other because their
    positions are consecutive or have no position preference (because their
    position is None).

    The result is a list of [position, [consecutive node list]]
    """
    firstlinenum = None
    for hexnode, linenum in tagnodes:
        firstlinenum = linenum
        if firstlinenum is not None:
            break

            prevlinenum = linenum
    return groupednodes


def writemergedtags(fcd, mergedtags):
    """
    write the merged tags while trying to minimize the diff to the first parent

    This function uses the ordering info stored on the merged tags dict to
    generate an .hgtags file which is correct (in the sense that its contents
    correspond to the result of the tag merge) while also being as close as
    possible to the first parent's .hgtags file.
    """
    # group the node-tag pairs that must be written next to each other
    for tname, taglist in list(mergedtags.items()):
        mergedtags[tname] = grouptagnodesbyline(taglist)

    # convert the grouped merged tags dict into a format that resembles the

    mergedtagstring = b'\n'.join([tags for rank, tags in finaltags if tags])
    fcd.write(mergedtagstring + b'\n', fcd.flags())


def singletagmerge(p1nodes, p2nodes):
    """
    merge the nodes corresponding to a single tag

    Note that the inputs are lists of node-linenum pairs (i.e. not just lists
    of nodes)
    """
    if not p2nodes:
        return p1nodes
    if not p1nodes:
        return p2nodes

    # whole list of lr nodes
    return lrnodes + hrnodes[commonidx:]


def merge(repo, fcd, fco, fca):
    """
    Merge the tags of two revisions, taking into account the base tags
    Try to minimize the diff between the merged tags and the first parent tags
    """
    ui = repo.ui
    # read the p1, p2 and base tags
    # only keep the line numbers for the p1 tags
    p1tags = readtagsformerge(
        ui, repo, fcd.data().splitlines(), fn=b"p1 tags", keeplinenums=True