Mercurial > hg
annotate mercurial/txnutil.py @ 44032:2d4cad94d08a
rcutil: drop the `defaultrcpath()` method (API)
The resource based code can service py2, py3 and an oxidized executable, so
there's no reason to leave this around. It was flagged as an API change when it
was introduced, so flagging it again.
Differential Revision: https://phab.mercurial-scm.org/D7777
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sun, 29 Dec 2019 21:10:04 -0500 |
parents | 687b865b95ad |
children | 89a2afe31e82 |
rev | line source |
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1 # txnutil.py - transaction related utilities |
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2 # |
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3 # Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> 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 |
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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 import errno |
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11 |
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12 from . import encoding |
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13 |
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14 |
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15 def mayhavepending(root): |
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16 '''return whether 'root' may have pending changes, which are |
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17 visible to this process. |
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18 ''' |
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19 return root == encoding.environ.get(b'HG_PENDING') |
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20 |
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21 |
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22 def trypending(root, vfs, filename, **kwargs): |
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23 '''Open file to be read according to HG_PENDING environment variable |
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24 |
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25 This opens '.pending' of specified 'filename' only when HG_PENDING |
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26 is equal to 'root'. |
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27 |
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28 This returns '(fp, is_pending_opened)' tuple. |
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29 ''' |
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30 if mayhavepending(root): |
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31 try: |
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32 return (vfs(b'%s.pending' % filename, **kwargs), True) |
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33 except IOError as inst: |
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34 if inst.errno != errno.ENOENT: |
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35 raise |
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36 return (vfs(filename, **kwargs), False) |