Python pip.locations 模块，running_under_virtualenv() 实例源码

def check_if_exists(self):
        """Find an installed distribution that satisfies or conflicts
        with this requirement, and set self.satisfied_by or
        self.conflicts_with appropriately."""

        if self.req is None:
            return False
        try:
            self.satisfied_by = pkg_resources.get_distribution(self.req)
        except pkg_resources.DistributionNotFound:
            return False
        except pkg_resources.VersionConflict:
            existing_dist = pkg_resources.get_distribution(self.req.project_name)
            if self.use_user_site:
                if dist_in_usersite(existing_dist):
                    self.conflicts_with = existing_dist
                elif running_under_virtualenv() and dist_in_site_packages(existing_dist):
                    raise InstallationError("Will not install to the user site because it will lack sys.path precedence to %s in %s"
                                            %(existing_dist.project_name, existing_dist.location))
            else:
                self.conflicts_with = existing_dist
        return True

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def is_local(path):
    """
    Return True if path is within sys.prefix, if we're running in a virtualenv.

    If we're not in a virtualenv, all paths are considered "local."

    """
    if not running_under_virtualenv():
        return True
    return normalize_path(path).startswith(normalize_path(sys.prefix))

def egg_link_path(dist):
    """
    Return the path for the .egg-link file if it exists, otherwise, None.

    There's 3 scenarios:
    1) not in a virtualenv
       try to find in site.USER_SITE, then site_packages
    2) in a no-global virtualenv
       try to find in site_packages
    3) in a yes-global virtualenv
       try to find in site_packages, then site.USER_SITE  (don't look in global location)

    For #1 and #3, there could be odd cases, where there's an egg-link in 2 locations.
    This method will just return the first one found.
    """
    sites = []
    if running_under_virtualenv():
        if virtualenv_no_global():
            sites.append(site_packages)
        else:
            sites.append(site_packages)
            if user_site:
                sites.append(user_site)
    else:
        if user_site:
            sites.append(user_site)
        sites.append(site_packages)

    for site in sites:
        egglink = os.path.join(site, dist.project_name) + '.egg-link'
        if os.path.isfile(egglink):
            return egglink

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def is_local(path):
    """
    Return True if path is within sys.prefix, if we're running in a virtualenv.

    If we're not in a virtualenv, all paths are considered "local."

    """
    if not running_under_virtualenv():
        return True
    return normalize_path(path).startswith(normalize_path(sys.prefix))

def egg_link_path(dist):
    """
    Return the path for the .egg-link file if it exists, otherwise, None.

    There's 3 scenarios:
    1) not in a virtualenv
       try to find in site.USER_SITE, then site_packages
    2) in a no-global virtualenv
       try to find in site_packages
    3) in a yes-global virtualenv
       try to find in site_packages, then site.USER_SITE  (don't look in global location)

    For #1 and #3, there could be odd cases, where there's an egg-link in 2 locations.
    This method will just return the first one found.
    """
    sites = []
    if running_under_virtualenv():
        if virtualenv_no_global():
            sites.append(site_packages)
        else:
            sites.append(site_packages)
            if user_site:
                sites.append(user_site)
    else:
        if user_site:
            sites.append(user_site)
        sites.append(site_packages)

    for site in sites:
        egglink = os.path.join(site, dist.project_name) + '.egg-link'
        if os.path.isfile(egglink):
            return egglink

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def is_local(path):
    """
    Return True if path is within sys.prefix, if we're running in a virtualenv.

    If we're not in a virtualenv, all paths are considered "local."

    """
    if not running_under_virtualenv():
        return True
    return normalize_path(path).startswith(normalize_path(sys.prefix))

def egg_link_path(dist):
    """
    Return the path for the .egg-link file if it exists, otherwise, None.

    There's 3 scenarios:
    1) not in a virtualenv
       try to find in site.USER_SITE, then site_packages
    2) in a no-global virtualenv
       try to find in site_packages
    3) in a yes-global virtualenv
       try to find in site_packages, then site.USER_SITE  (don't look in global location)

    For #1 and #3, there could be odd cases, where there's an egg-link in 2 locations.
    This method will just return the first one found.
    """
    sites = []
    if running_under_virtualenv():
        if virtualenv_no_global():
            sites.append(site_packages)
        else:
            sites.append(site_packages)
            if user_site:
                sites.append(user_site)
    else:
        if user_site:
            sites.append(user_site)
        sites.append(site_packages)

    for site in sites:
        egglink = os.path.join(site, dist.project_name) + '.egg-link'
        if os.path.isfile(egglink):
            return egglink

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def is_local(path):
    """
    Return True if path is within sys.prefix, if we're running in a virtualenv.

    If we're not in a virtualenv, all paths are considered "local."

    """
    if not running_under_virtualenv():
        return True
    return normalize_path(path).startswith(normalize_path(sys.prefix))

def egg_link_path(dist):
    """
    Return the path for the .egg-link file if it exists, otherwise, None.

    There's 3 scenarios:
    1) not in a virtualenv
       try to find in site.USER_SITE, then site_packages
    2) in a no-global virtualenv
       try to find in site_packages
    3) in a yes-global virtualenv
       try to find in site_packages, then site.USER_SITE  (don't look in global location)

    For #1 and #3, there could be odd cases, where there's an egg-link in 2 locations.
    This method will just return the first one found.
    """
    sites = []
    if running_under_virtualenv():
        if virtualenv_no_global():
            sites.append(site_packages)
        else:
            sites.append(site_packages)
            if user_site:
                sites.append(user_site)
    else:
        if user_site:
            sites.append(user_site)
        sites.append(site_packages)

    for site in sites:
        egglink = os.path.join(site, dist.project_name) + '.egg-link'
        if os.path.isfile(egglink):
            return egglink

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def is_local(path):
    """
    Return True if path is within sys.prefix, if we're running in a virtualenv.

    If we're not in a virtualenv, all paths are considered "local."

    """
    if not running_under_virtualenv():
        return True
    return normalize_path(path).startswith(normalize_path(sys.prefix))

def egg_link_path(dist):
    """
    Return the path for the .egg-link file if it exists, otherwise, None.

    There's 3 scenarios:
    1) not in a virtualenv
       try to find in site.USER_SITE, then site_packages
    2) in a no-global virtualenv
       try to find in site_packages
    3) in a yes-global virtualenv
       try to find in site_packages, then site.USER_SITE  (don't look in global location)

    For #1 and #3, there could be odd cases, where there's an egg-link in 2 locations.
    This method will just return the first one found.
    """
    sites = []
    if running_under_virtualenv():
        if virtualenv_no_global():
            sites.append(site_packages)
        else:
            sites.append(site_packages)
            if user_site:
                sites.append(user_site)
    else:
        if user_site:
            sites.append(user_site)
        sites.append(site_packages)

    for site in sites:
        egglink = os.path.join(site, dist.project_name) + '.egg-link'
        if os.path.isfile(egglink):
            return egglink

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()

def load_selfcheck_statefile():
    if running_under_virtualenv():
        return VirtualenvSelfCheckState()
    else:
        return GlobalSelfCheckState()