comparison mercurial/obsutil.py @ 34421:187bc224554a

effectflag: detect when diff changed

Store in effect flag when the diff changed between the predecessor and
its successors.

Comparing the diff is not easy because we do not want to incorrectly detect a

34420:95759620d492

# logic around storing and using effect flags
EFFECTFLAGFIELD = "ef1"

DESCCHANGED = 1 << 0 # action changed the description
METACHANGED = 1 << 1 # action change the meta
PARENTCHANGED = 1 << 2 # action change the parent
USERCHANGED = 1 << 4 # the user changed
DATECHANGED = 1 << 5 # the date changed
BRANCHCHANGED = 1 << 6 # the branch changed

    """
    metakey = metaitem[0]

    return not any(pattern.match(metakey) for pattern in METABLACKLIST)

def geteffectflag(relation):
    """ From an obs-marker relation, compute what changed between the
    predecessor and the successor.
    """
    effects = 0

        sourceextra = source.extra().items()
        srcmeta = filter(metanotblacklisted, sourceextra)

        if ctxmeta != srcmeta:
            effects |= METACHANGED

    return effects

def getobsoleted(repo, tr):
    """return the set of pre-existing revisions obsoleted by a transaction"""

34421:187bc224554a

# logic around storing and using effect flags
EFFECTFLAGFIELD = "ef1"

DESCCHANGED = 1 << 0 # action changed the description
METACHANGED = 1 << 1 # action change the meta
DIFFCHANGED = 1 << 3 # action change diff introduced by the changeset
PARENTCHANGED = 1 << 2 # action change the parent
USERCHANGED = 1 << 4 # the user changed
DATECHANGED = 1 << 5 # the date changed
BRANCHCHANGED = 1 << 6 # the branch changed

    """
    metakey = metaitem[0]

    return not any(pattern.match(metakey) for pattern in METABLACKLIST)

def _prepare_hunk(hunk):
    """Drop all information but the username and patch"""
    cleanhunk = []
    for line in hunk.splitlines():
        if line.startswith(b'# User') or not line.startswith(b'#'):
            if line.startswith(b'@@'):
                line = b'@@\n'
            cleanhunk.append(line)
    return cleanhunk

def _getdifflines(iterdiff):
    """return a cleaned up lines"""
    lines = next(iterdiff, None)

    if lines is None:
        return lines

    return _prepare_hunk(lines)

def _cmpdiff(leftctx, rightctx):
    """return True if both ctx introduce the "same diff"

    This is a first and basic implementation, with many shortcoming.
    """

    # Leftctx or right ctx might be filtered, so we need to use the contexts
    # with an unfiltered repository to safely compute the diff
    leftunfi = leftctx._repo.unfiltered()[leftctx.rev()]
    leftdiff = leftunfi.diff(git=1)
    rightunfi = rightctx._repo.unfiltered()[rightctx.rev()]
    rightdiff = rightunfi.diff(git=1)

    left, right = (0, 0)
    while None not in (left, right):
        left = _getdifflines(leftdiff)
        right = _getdifflines(rightdiff)

        if left != right:
            return False
    return True

def geteffectflag(relation):
    """ From an obs-marker relation, compute what changed between the
    predecessor and the successor.
    """
    effects = 0

        sourceextra = source.extra().items()
        srcmeta = filter(metanotblacklisted, sourceextra)

        if ctxmeta != srcmeta:
            effects |= METACHANGED

        # Check if the diff has changed
        if not _cmpdiff(source, changectx):
            effects |= DIFFCHANGED

    return effects

def getobsoleted(repo, tr):
    """return the set of pre-existing revisions obsoleted by a transaction"""