upstream/mercurial-mirror Files · contrib/automation/hgautomation/__init__.py

rhg: fix race when an ambiguous file is deleted on disk...

rhg: fix race when an ambiguous file is deleted on disk There are two places in the status code where we handle files whose status we are unsure of based off of metadata alone: this one is the first one to actually disambiguate, and the second one is later in the code (but updated in the previous commit) for files that are actually clean to update the dirstate. Since there is a chance that the contents have changed between those two moments, we need to stat the files again, since re-using the old stat could lie about the clean state of the file.

Augie Fackler - - Load All Authors

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                r51121:8fcd5302

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             __init__.py
        
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      # __init__.py - High-level automation interfaces

      #

      # Copyright 2019 Gregory Szorc <gregory.szorc@gmail.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      # no-check-code because Python 3 native.

      import pathlib

      import secrets

      from .aws import AWSConnection

      class HGAutomation:

          """High-level interface for Mercurial automation.

          Holds global state, provides access to other primitives, etc.

          """

          def __init__(self, state_path: pathlib.Path):

              self.state_path = state_path

              state_path.mkdir(exist_ok=True)

          def default_password(self):

              """Obtain the default password to use for remote machines.

              A new password will be generated if one is not stored.

              """

              p = self.state_path / 'default-password'

              try:

                  with p.open('r', encoding='ascii') as fh:

                      data = fh.read().strip()

                      if data:

                          return data

              except FileNotFoundError:

                  pass

              password = secrets.token_urlsafe(24)

              with p.open('w', encoding='ascii') as fh:

                  fh.write(password)

                  fh.write('\n')

              p.chmod(0o0600)

              return password

          def aws_connection(self, region: str, ensure_ec2_state: bool = True):

              """Obtain an AWSConnection instance bound to a specific region."""

              return AWSConnection(self, region, ensure_ec2_state=ensure_ec2_state)

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				# __init__.py - High-level automation interfaces
				#
				# Copyright 2019 Gregory Szorc <gregory.szorc@gmail.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				# no-check-code because Python 3 native.

				import pathlib
				import secrets

				from .aws import AWSConnection


				class HGAutomation:
				"""High-level interface for Mercurial automation.

				Holds global state, provides access to other primitives, etc.
				"""

				def __init__(self, state_path: pathlib.Path):
				self.state_path = state_path

				state_path.mkdir(exist_ok=True)

				def default_password(self):
				"""Obtain the default password to use for remote machines.

				A new password will be generated if one is not stored.
				"""
				p = self.state_path / 'default-password'

				try:
				with p.open('r', encoding='ascii') as fh:
				data = fh.read().strip()

				if data:
				return data

				except FileNotFoundError:
				pass

				password = secrets.token_urlsafe(24)

				with p.open('w', encoding='ascii') as fh:
				fh.write(password)
				fh.write('\n')

				p.chmod(0o0600)

				return password

				def aws_connection(self, region: str, ensure_ec2_state: bool = True):
				"""Obtain an AWSConnection instance bound to a specific region."""

				return AWSConnection(self, region, ensure_ec2_state=ensure_ec2_state)