Mercurial > hg
annotate mercurial/pure/diffhelpers.py @ 28228:abf120262683
changegroup: make _packmanifests() dumber
The next few patches will rewrite the manifest generation code to work
with merges. We will then walk dirlogs recursively. This prepares for
that by moving much of the treemanifest code out of _packmanifests()
and into generatemanifests(). For this to work, it also adds
_manifestsdone() method that returns the "end of manifests" close
chunk for cg3 and an empty string for cg1 and cg2.
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Fri, 12 Feb 2016 15:18:56 -0800 |
parents | 80214358ac88 |
children | f53b55b162f4 |
rev | line source |
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1 # diffhelpers.py - pure Python implementation of diffhelpers.c |
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2 # |
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3 # Copyright 2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 def addlines(fp, hunk, lena, lenb, a, b): |
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11 while True: |
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12 todoa = lena - len(a) |
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13 todob = lenb - len(b) |
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14 num = max(todoa, todob) |
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15 if num == 0: |
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16 break |
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17 for i in xrange(num): |
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18 s = fp.readline() |
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19 c = s[0] |
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20 if s == "\\ No newline at end of file\n": |
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21 fix_newline(hunk, a, b) |
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22 continue |
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23 if c == "\n": |
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24 # Some patches may be missing the control char |
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25 # on empty lines. Supply a leading space. |
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26 s = " \n" |
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27 hunk.append(s) |
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28 if c == "+": |
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29 b.append(s[1:]) |
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30 elif c == "-": |
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31 a.append(s) |
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32 else: |
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33 b.append(s[1:]) |
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34 a.append(s) |
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35 return 0 |
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36 |
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37 def fix_newline(hunk, a, b): |
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38 l = hunk[-1] |
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39 # tolerate CRLF in last line |
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40 if l.endswith('\r\n'): |
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41 hline = l[:-2] |
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42 else: |
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43 hline = l[:-1] |
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44 c = hline[0] |
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45 |
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46 if c in " +": |
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47 b[-1] = hline[1:] |
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48 if c in " -": |
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49 a[-1] = hline |
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50 hunk[-1] = hline |
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51 return 0 |
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52 |
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53 |
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54 def testhunk(a, b, bstart): |
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55 alen = len(a) |
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56 blen = len(b) |
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57 if alen > blen - bstart: |
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58 return -1 |
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59 for i in xrange(alen): |
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60 if a[i][1:] != b[i + bstart]: |
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61 return -1 |
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62 return 0 |