author | Raphaël Gomès <rgomes@octobus.net> |
Thu, 03 Nov 2022 16:30:35 +0100 | |
branch | stable |
changeset 49569 | 5318ac25dfdc |
parent 49306 | 2e726c934fcd |
child 51863 | f4733654f144 |
permissions | -rw-r--r-- |
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# txnutil.py - transaction related utilities |
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# |
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# Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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from . import encoding |
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def mayhavepending(root): |
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"""return whether 'root' may have pending changes, which are |
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visible to this process. |
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""" |
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return root == encoding.environ.get(b'HG_PENDING') |
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def trypending(root, vfs, filename, **kwargs): |
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"""Open file to be read according to HG_PENDING environment variable |
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This opens '.pending' of specified 'filename' only when HG_PENDING |
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is equal to 'root'. |
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This returns '(fp, is_pending_opened)' tuple. |
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""" |
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if mayhavepending(root): |
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try: |
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return (vfs(b'%s.pending' % filename, **kwargs), True) |
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except FileNotFoundError: |
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pass |
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return (vfs(filename, **kwargs), False) |