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
python类running_under_virtualenv()的实例源码
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()
