comparison mercurial/mdiff.py @ 31269:5e7fd3a0b17f

mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)

Now _unidiff yields each hunk lines packed into a tuple with the "range
information" `(s1, l1, s2, l2)` that is used to build the typical hunk header
'@@ -s1,l1 +s2,l2 @@'.
This will be used to make it possible to filter diff hunks based on this range
information.

The new "range information" is ignored in unidiff() (only caller of _unidiff)
for now.

31268:4fba214708ee

        else:
            l2 = "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2))
        l3 = "@@ -1,%d +0,0 @@\n" % len(a)
        l = [l1, l2, l3] + ["-" + e for e in a]
    else:
        l = list(_unidiff(a, b, opts=opts))
        if not l:
            return ""

        l.insert(0, "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1)))
        l.insert(1, "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2)))

            l[ln] += "\n\ No newline at end of file\n"

    return "".join(l)

def _unidiff(t1, t2, opts=defaultopts):
    """Yield hunks of a headerless unified diff from t1 and t2 texts."""
    l1 = splitnewlines(t1)
    l2 = splitnewlines(t2)
    def contextend(l, len):
        ret = l + opts.context
        if ret > len:

        if alen:
            astart += 1
        if blen:
            bstart += 1

        yield "@@ -%d,%d +%d,%d @@%s\n" % (astart, alen,
                                           bstart, blen, func)
        for x in delta:
            yield x
        for x in xrange(a2, aend):
            yield ' ' + l1[x]

    # bdiff.blocks gives us the matching sequences in the files.  The loop
    # below finds the spaces between those matching sequences and translates
    # them into diff output.
    #

31269:5e7fd3a0b17f

        else:
            l2 = "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2))
        l3 = "@@ -1,%d +0,0 @@\n" % len(a)
        l = [l1, l2, l3] + ["-" + e for e in a]
    else:
        l = sum((hlines for hrange, hlines in _unidiff(a, b, opts=opts)), [])
        if not l:
            return ""

        l.insert(0, "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1)))
        l.insert(1, "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2)))

            l[ln] += "\n\ No newline at end of file\n"

    return "".join(l)

def _unidiff(t1, t2, opts=defaultopts):
    """Yield hunks of a headerless unified diff from t1 and t2 texts.

    Each hunk consists of a (hunkrange, hunklines) tuple where `hunkrange` is a
    tuple (s1, l1, s2, l2) representing the range information of the hunk to
    form the '@@ -s1,l1 +s2,l2 @@' header and `hunklines` is a list of lines
    of the hunk combining said header followed by line additions and
    deletions.
    """
    l1 = splitnewlines(t1)
    l2 = splitnewlines(t2)
    def contextend(l, len):
        ret = l + opts.context
        if ret > len:

        if alen:
            astart += 1
        if blen:
            bstart += 1

        hunkrange = astart, alen, bstart, blen
        hunklines = (
            ["@@ -%d,%d +%d,%d @@%s\n" % (hunkrange + (func,))]
            + delta
            + [' ' + l1[x] for x in xrange(a2, aend)]
        )
        yield hunkrange, hunklines

    # bdiff.blocks gives us the matching sequences in the files.  The loop
    # below finds the spaces between those matching sequences and translates
    # them into diff output.
    #