Mercurial > hg
view mercurial/diffhelper.py @ 44951:83e41b73d115
git: add debug logging when there's a mismatch in the cached heads list
The dag rebuild can be expensive, so let's try and avoid bugs where it
transparently rebuilds all the time for no reason. This would have
prevented the issue fixed in D8622.
Differential Revision: https://phab.mercurial-scm.org/D8625
author | Augie Fackler <augie@google.com> |
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date | Tue, 09 Jun 2020 17:13:26 -0400 |
parents | 687b865b95ad |
children | 10f48720ef95 |
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# diffhelper.py - helper routines for patch # # Copyright 2009 Matt Mackall <mpm@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import from .i18n import _ from . import ( error, pycompat, ) def addlines(fp, hunk, lena, lenb, a, b): """Read lines from fp into the hunk The hunk is parsed into two arrays, a and b. a gets the old state of the text, b gets the new state. The control char from the hunk is saved when inserting into a, but not b (for performance while deleting files.) """ while True: todoa = lena - len(a) todob = lenb - len(b) num = max(todoa, todob) if num == 0: break for i in pycompat.xrange(num): s = fp.readline() if not s: raise error.ParseError(_(b'incomplete hunk')) if s == b"\\ No newline at end of file\n": fixnewline(hunk, a, b) continue if s == b'\n' or s == b'\r\n': # Some patches may be missing the control char # on empty lines. Supply a leading space. s = b' ' + s hunk.append(s) if s.startswith(b'+'): b.append(s[1:]) elif s.startswith(b'-'): a.append(s) else: b.append(s[1:]) a.append(s) def fixnewline(hunk, a, b): """Fix up the last lines of a and b when the patch has no newline at EOF""" l = hunk[-1] # tolerate CRLF in last line if l.endswith(b'\r\n'): hline = l[:-2] else: hline = l[:-1] if hline.startswith((b' ', b'+')): b[-1] = hline[1:] if hline.startswith((b' ', b'-')): a[-1] = hline hunk[-1] = hline def testhunk(a, b, bstart): """Compare the lines in a with the lines in b a is assumed to have a control char at the start of each line, this char is ignored in the compare. """ alen = len(a) blen = len(b) if alen > blen - bstart or bstart < 0: return False for i in pycompat.xrange(alen): if a[i][1:] != b[i + bstart]: return False return True