mercurial/mdiff.py
author Matt Mackall <mpm@selenic.com>
Tue, 25 Oct 2005 22:17:31 -0700
changeset 1452 f1755621cb7d
parent 1379 8ee7ce877be2
child 1540 8ca9f5b17257
permissions -rw-r--r--
Remove now unused sortdiff and diff from mdiff
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# mdiff.py - diff and patch routines for mercurial
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#
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# Copyright 2005 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import difflib, struct, bdiff, util, mpatch
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def unidiff(a, ad, b, bd, fn, r=None, text=False):
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    if not a and not b: return ""
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    epoch = util.datestr((0, 0))
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    if not text and (util.binary(a) or util.binary(b)):
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        l = ['Binary file %s has changed\n' % fn]
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    elif a == None:
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        b = b.splitlines(1)
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        l1 = "--- %s\t%s\n" % ("/dev/null", epoch)
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        l2 = "+++ %s\t%s\n" % ("b/" + fn, bd)
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        l3 = "@@ -0,0 +1,%d @@\n" % len(b)
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        l = [l1, l2, l3] + ["+" + e for e in b]
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    elif b == None:
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        a = a.splitlines(1)
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        l1 = "--- %s\t%s\n" % ("a/" + fn, ad)
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        l2 = "+++ %s\t%s\n" % ("/dev/null", epoch)
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        l3 = "@@ -1,%d +0,0 @@\n" % len(a)
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        l = [l1, l2, l3] + ["-" + e for e in a]
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    else:
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        a = a.splitlines(1)
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        b = b.splitlines(1)
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        l = list(difflib.unified_diff(a, b, "a/" + fn, "b/" + fn))
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        if not l: return ""
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        # difflib uses a space, rather than a tab
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        l[0] = l[0][:-2] + "\t" + ad + "\n"
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        l[1] = l[1][:-2] + "\t" + bd + "\n"
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    for ln in xrange(len(l)):
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        if l[ln][-1] != '\n':
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            l[ln] += "\n\ No newline at end of file\n"
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    if r:
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        l.insert(0, "diff %s %s\n" %
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                    (' '.join(["-r %s" % rev for rev in r]), fn))
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    return "".join(l)
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def patchtext(bin):
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    pos = 0
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    t = []
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    while pos < len(bin):
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        p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
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        pos += 12
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        t.append(bin[pos:pos + l])
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        pos += l
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    return "".join(t)
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def patch(a, bin):
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    return mpatch.patches(a, [bin])
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patches = mpatch.patches
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textdiff = bdiff.bdiff