Mercurial > hg
annotate mercurial/diffhelper.py @ 39583:ee1e74ee037c
formatter: fill missing resources by formatter, not by resource mapper
While working on demand loading of ctx/fctx objects, I found it's weird
to support lookup in both directions. For instance, fctx can be loaded
from (ctx, path) pair, but ctx may also be derived from fctx.changectx()
in the original mapping. If the original mapping has had fctx but no ctx,
and if the new mapping provides {path}, we can't be sure if fctx should be
updated by fctx'.changectx()[path] or not.
This patch simply drops the support for the resolution in fctx -> ctx -> repo
direction.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sat, 01 Sep 2018 13:21:45 +0900 |
parents | e7aa113b14f7 |
children | 57875cf423c9 |
rev | line source |
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1 # diffhelper.py - helper routines for patch |
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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 from .i18n import _ |
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11 |
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12 from . import ( |
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13 error, |
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14 pycompat, |
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15 ) |
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16 |
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17 def addlines(fp, hunk, lena, lenb, a, b): |
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18 """Read lines from fp into the hunk |
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19 |
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20 The hunk is parsed into two arrays, a and b. a gets the old state of |
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21 the text, b gets the new state. The control char from the hunk is saved |
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22 when inserting into a, but not b (for performance while deleting files.) |
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23 """ |
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24 while True: |
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25 todoa = lena - len(a) |
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26 todob = lenb - len(b) |
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27 num = max(todoa, todob) |
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28 if num == 0: |
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29 break |
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30 for i in pycompat.xrange(num): |
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31 s = fp.readline() |
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32 if not s: |
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33 raise error.ParseError(_('incomplete hunk')) |
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34 if s == "\\ No newline at end of file\n": |
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35 fixnewline(hunk, a, b) |
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36 continue |
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37 if s == '\n' or s == '\r\n': |
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38 # Some patches may be missing the control char |
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39 # on empty lines. Supply a leading space. |
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40 s = ' ' + s |
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41 hunk.append(s) |
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42 if s.startswith('+'): |
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43 b.append(s[1:]) |
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44 elif s.startswith('-'): |
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45 a.append(s) |
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46 else: |
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47 b.append(s[1:]) |
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48 a.append(s) |
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49 |
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50 def fixnewline(hunk, a, b): |
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51 """Fix up the last lines of a and b when the patch has no newline at EOF""" |
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52 l = hunk[-1] |
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53 # tolerate CRLF in last line |
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54 if l.endswith('\r\n'): |
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55 hline = l[:-2] |
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56 else: |
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57 hline = l[:-1] |
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58 |
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59 if hline.startswith((' ', '+')): |
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60 b[-1] = hline[1:] |
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61 if hline.startswith((' ', '-')): |
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62 a[-1] = hline |
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63 hunk[-1] = hline |
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64 |
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65 def testhunk(a, b, bstart): |
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66 """Compare the lines in a with the lines in b |
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67 |
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68 a is assumed to have a control char at the start of each line, this char |
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69 is ignored in the compare. |
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70 """ |
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71 alen = len(a) |
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72 blen = len(b) |
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73 if alen > blen - bstart or bstart < 0: |
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74 return False |
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75 for i in pycompat.xrange(alen): |
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76 if a[i][1:] != b[i + bstart]: |
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77 return False |
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78 return True |