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| @@ -5,6 +5,7 b' import difflib' | |||||
| 5 | import re |
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5 | import re | |
| 6 | from optparse import OptionParser |
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6 | from optparse import OptionParser | |
| 7 | from mercurial.bdiff import bdiff, blocks |
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7 | from mercurial.bdiff import bdiff, blocks | |
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8 | from mercurial.mdiff import bunidiff | |||
| 8 |
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9 | |||
| 9 | VERSION="0.2" |
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10 | VERSION="0.2" | |
| 10 | usage = "usage: %prog [options] file1 file2" |
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11 | usage = "usage: %prog [options] file1 file2" | |
| @@ -23,127 +24,6 b' if not args:' | |||||
| 23 | parser.print_help() |
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24 | parser.print_help() | |
| 24 | sys.exit(1) |
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25 | sys.exit(1) | |
| 25 |
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26 | |||
| 26 | # somewhat self contained replacement for difflib.unified_diff |
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| 27 | # t1 and t2 are the text to be diffed |
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| 28 | # l1 and l2 are the text broken up into lines |
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| 29 | # header1 and header2 are the filenames for the diff output |
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| 30 | # context is the number of context lines |
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| 31 | # showfunc enables diff -p output |
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| 32 | # ignorews ignores all whitespace changes in the diff |
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| 33 | def bunidiff(t1, t2, l1, l2, header1, header2, context=3, showfunc=False, |
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| 34 | ignorews=False): |
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| 35 | def contextend(l, len): |
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| 36 | ret = l + context |
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| 37 | if ret > len: |
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| 38 | ret = len |
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| 39 | return ret |
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| 40 |
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| 41 | def contextstart(l): |
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| 42 | ret = l - context |
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| 43 | if ret < 0: |
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| 44 | return 0 |
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| 45 | return ret |
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| 46 |
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| 47 | def yieldhunk(hunk, header): |
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| 48 | if header: |
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| 49 | for x in header: |
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| 50 | yield x |
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| 51 | (astart, a2, bstart, b2, delta) = hunk |
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| 52 | aend = contextend(a2, len(l1)) |
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| 53 | alen = aend - astart |
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| 54 | blen = b2 - bstart + aend - a2 |
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| 55 |
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| 56 | func = "" |
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| 57 | if showfunc: |
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| 58 | # walk backwards from the start of the context |
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| 59 | # to find a line starting with an alphanumeric char. |
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| 60 | for x in xrange(astart, -1, -1): |
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| 61 | t = l1[x] |
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| 62 | if funcre.match(t): |
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| 63 | func = ' ' + t[:40] |
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| 64 | break |
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| 65 |
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| 66 | yield "@@ -%d,%d +%d,%d @@%s\n" % (astart + 1, alen, |
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| 67 | bstart + 1, blen, func) |
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| 68 | for x in delta: |
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| 69 | yield x |
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| 70 | for x in xrange(a2, aend): |
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| 71 | yield ' ' + l1[x] |
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| 72 |
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| 73 | header = [ "--- %s\t\n" % header1, "+++ %s\t\n" % header2 ] |
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| 74 |
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| 75 | if showfunc: |
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| 76 | funcre = re.compile('\w') |
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| 77 | if ignorews: |
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| 78 | wsre = re.compile('[ \t]') |
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| 79 |
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| 80 | # bdiff.blocks gives us the matching sequences in the files. The loop |
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| 81 | # below finds the spaces between those matching sequences and translates |
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| 82 | # them into diff output. |
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| 83 | # |
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| 84 | diff = blocks(t1, t2) |
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| 85 | hunk = None |
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| 86 | for i in xrange(len(diff)): |
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| 87 | # The first match is special. |
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| 88 | # we've either found a match starting at line 0 or a match later |
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| 89 | # in the file. If it starts later, old and new below will both be |
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| 90 | # empty and we'll continue to the next match. |
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| 91 | if i > 0: |
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| 92 | s = diff[i-1] |
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| 93 | else: |
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| 94 | s = [0, 0, 0, 0] |
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| 95 | delta = [] |
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| 96 | s1 = diff[i] |
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| 97 | a1 = s[1] |
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| 98 | a2 = s1[0] |
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| 99 | b1 = s[3] |
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| 100 | b2 = s1[2] |
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| 101 | old = l1[a1:a2] |
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| 102 | new = l2[b1:b2] |
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| 103 |
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| 104 | # bdiff sometimes gives huge matches past eof, this check eats them, |
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| 105 | # and deals with the special first match case described above |
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| 106 | if not old and not new: |
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| 107 | continue |
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| 108 |
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| 109 | if ignorews: |
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| 110 | wsold = wsre.sub('', "".join(old)) |
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| 111 | wsnew = wsre.sub('', "".join(new)) |
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| 112 | if wsold == wsnew: |
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| 113 | continue |
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| 114 |
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| 115 | astart = contextstart(a1) |
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| 116 | bstart = contextstart(b1) |
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| 117 | prev = None |
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| 118 | if hunk: |
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| 119 | # join with the previous hunk if it falls inside the context |
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| 120 | if astart < hunk[1] + context + 1: |
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| 121 | prev = hunk |
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| 122 | astart = hunk[1] |
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| 123 | bstart = hunk[3] |
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| 124 | else: |
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| 125 | for x in yieldhunk(hunk, header): |
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| 126 | yield x |
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| 127 | # we only want to yield the header if the files differ, and |
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| 128 | # we only want to yield it once. |
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| 129 | header = None |
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| 130 | if prev: |
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| 131 | # we've joined the previous hunk, record the new ending points. |
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| 132 | hunk[1] = a2 |
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| 133 | hunk[3] = b2 |
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| 134 | delta = hunk[4] |
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| 135 | else: |
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| 136 | # create a new hunk |
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| 137 | hunk = [ astart, a2, bstart, b2, delta ] |
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| 138 |
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| 139 | delta[len(delta):] = [ ' ' + x for x in l1[astart:a1] ] |
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| 140 | delta[len(delta):] = [ '-' + x for x in old ] |
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| 141 | delta[len(delta):] = [ '+' + x for x in new ] |
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| 142 |
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| 143 | if hunk: |
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| 144 | for x in yieldhunk(hunk, header): |
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| 145 | yield x |
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| 146 |
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| 147 | # simple utility function to put all the |
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27 | # simple utility function to put all the | |
| 148 | # files from a directory tree into a dict |
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28 | # files from a directory tree into a dict | |
| 149 | def buildlist(names, top): |
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29 | def buildlist(names, top): | |
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