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44343769f8
Summary: We want to rename away from "mercurial". Rather than rename the "mercurial" Python package, we opted to just collapse it into the parent "edenscm" package. This is also a step towards further organizing we want to do around the new project name. To ease the transition wrt hotfixes, we now replace "edenscm.mercurial" with "mercurial" to fix imports within base64-python extensions. Reviewed By: sggutier Differential Revision: D38943169 fbshipit-source-id: 03fa18079c51e2f7fac05d65b127095da3ab7c99
63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
# Portions Copyright (c) Meta Platforms, Inc. and affiliates.
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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.
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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 __future__ import absolute_import
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import errno
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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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localispending = root == encoding.environ.get("HG_PENDING")
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localissharedpending = root == encoding.environ.get("HG_SHAREDPENDING")
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return localispending or localissharedpending
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def mayhavesharedpending(root, sharedroot):
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"""return whether 'root' or 'sharedroot' may have pending changes, which
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are visible to this process.
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"""
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localispending = root == encoding.environ.get("HG_PENDING")
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sharedissharedpending = sharedroot == encoding.environ.get("HG_SHAREDPENDING")
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return localispending or sharedissharedpending
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def trypending(root, vfs, filename, **kwargs):
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"""Open a file to be read according to the 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("%s.pending" % filename, **kwargs), True)
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except IOError as inst:
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if inst.errno != errno.ENOENT:
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raise
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return (vfs(filename, **kwargs), False)
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def trysharedpending(root, sharedroot, vfs, filename, **kwargs):
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if mayhavesharedpending(root, sharedroot):
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try:
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return (vfs("%s.pending" % filename, **kwargs), True)
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except IOError as inst:
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if inst.errno != errno.ENOENT:
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raise
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return (vfs(filename, **kwargs), False)
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