def select(package_specifier):
"""Select a package.
Only selected packages are considered when building up the environment
for 'po enter'.
"""
to_select = repository.find_installed_packages(package_specifier)
if not to_select:
return util.error("No matching packages.")
project_specifier = package.Specifier(package_specifier.project, {})
to_deselect = repository.find_installed_packages(project_specifier)
map(deselect_package, to_deselect)
map(select_package, to_select)
def deselect(package_specifier):
"Deselect a package."
map(deselect_package, repository.find_installed_packages(package_specifier))
