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Viewing changes to hooks/charmhelpers/contrib/python/packages.py

  • Committer: Liam Young
  • Date: 2016-03-30 09:07:46 UTC
  • mfrom: (63.1.4 trunk)
  • Revision ID: liam.young@canonical.com-20160330090746-rwwe91yjqi9j9ry3
[gnuoy, r=james-page] Add pause/resume actions

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hooks/charmhelpers/contrib/python/packages.py
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import os
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import subprocess
 
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import sys
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from charmhelpers.fetch import apt_install, apt_update
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from charmhelpers.core.hookenv import charm_dir, log
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try:
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    from pip import main as pip_execute
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except ImportError:
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    apt_update()
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    apt_install('python-pip')
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    from pip import main as pip_execute
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__author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
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def pip_execute(*args, **kwargs):
 
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    """Overriden pip_execute() to stop sys.path being changed.
 
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    The act of importing main from the pip module seems to cause add wheels
 
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    from the /usr/share/python-wheels which are installed by various tools.
 
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    This function ensures that sys.path remains the same after the call is
 
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    executed.
 
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    """
 
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    try:
 
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        _path = sys.path
 
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        try:
 
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            from pip import main as _pip_execute
 
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        except ImportError:
 
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            apt_update()
 
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            apt_install('python-pip')
 
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            from pip import main as _pip_execute
 
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        _pip_execute(*args, **kwargs)
 
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    finally:
 
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        sys.path = _path
 
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def parse_options(given, available):
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    """Given a set of options, check if available"""
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    for key, value in sorted(given.items()):
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            yield "--{0}={1}".format(key, value)
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def pip_install_requirements(requirements, **options):
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    """Install a requirements file """
 
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def pip_install_requirements(requirements, constraints=None, **options):
 
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    """Install a requirements file.
 
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    :param constraints: Path to pip constraints file.
 
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    http://pip.readthedocs.org/en/stable/user_guide/#constraints-files
 
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    """
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    command = ["install"]
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    available_options = ('proxy', 'src', 'log', )
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        command.append(option)
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    command.append("-r {0}".format(requirements))
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    log("Installing from file: {} with options: {}".format(requirements,
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                                                           command))
 
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    if constraints:
 
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        command.append("-c {0}".format(constraints))
 
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        log("Installing from file: {} with constraints {} "
 
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            "and options: {}".format(requirements, constraints, command))
 
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    else:
 
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        log("Installing from file: {} with options: {}".format(requirements,
 
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                                                               command))
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    pip_execute(command)
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