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|
##############################################################################
# Copyright (c) 2013, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://software.llnl.gov/spack
# Please also see the LICENSE file for our notice and the LGPL.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License (as published by
# the Free Software Foundation) version 2.1 dated February 1999.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
# conditions of the GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
import os
import exceptions
import sys
import inspect
import imp
import re
import traceback
from bisect import bisect_left
from external import yaml
import llnl.util.tty as tty
from llnl.util.filesystem import *
import spack.error
import spack.config
import spack.spec
from spack.virtual import ProviderIndex
from spack.util.naming import *
#
# Super-namespace for all packages.
# Package modules are imported as spack.pkg.<namespace>.<pkg-name>.
#
repo_namespace = 'spack.pkg'
#
# These names describe how repos should be laid out in the filesystem.
#
repo_config_name = 'repo.yaml' # Top-level filename for repo config.
packages_dir_name = 'packages' # Top-level repo directory containing pkgs.
package_file_name = 'package.py' # Filename for packages in a repository.
# Guaranteed unused default value for some functions.
NOT_PROVIDED = object()
def _autospec(function):
"""Decorator that automatically converts the argument of a single-arg
function to a Spec."""
def converter(self, spec_like, *args, **kwargs):
if not isinstance(spec_like, spack.spec.Spec):
spec_like = spack.spec.Spec(spec_like)
return function(self, spec_like, *args, **kwargs)
return converter
def _make_namespace_module(ns):
module = imp.new_module(ns)
module.__file__ = "(spack namespace)"
module.__path__ = []
module.__package__ = ns
return module
def substitute_spack_prefix(path):
"""Replaces instances of $spack with Spack's prefix."""
return re.sub(r'^\$spack', spack.prefix, path)
def canonicalize_path(path):
"""Substitute $spack, expand user home, take abspath."""
path = substitute_spack_prefix(path)
path = os.path.expanduser(path)
path = os.path.abspath(path)
return path
class RepoPath(object):
"""A RepoPath is a list of repos that function as one.
It functions exactly like a Repo, but it operates on the
combined results of the Repos in its list instead of on a
single package repository.
"""
def __init__(self, *repo_dirs, **kwargs):
# super-namespace for all packages in the RepoPath
self.super_namespace = kwargs.get('namespace', repo_namespace)
self.repos = []
self.by_namespace = NamespaceTrie()
self.by_path = {}
self._all_package_names = []
self._provider_index = None
# If repo_dirs is empty, just use the configuration
if not repo_dirs:
repo_dirs = spack.config.get_config('repos')
if not repo_dirs:
raise NoRepoConfiguredError(
"Spack configuration contains no package repositories.")
# Add each repo to this path.
for root in repo_dirs:
try:
repo = Repo(root, self.super_namespace)
self.put_last(repo)
except RepoError as e:
tty.warn("Failed to initialize repository at '%s'." % root,
e.message,
"To remove the bad repository, run this command:",
" spack repo rm %s" % root)
def swap(self, other):
"""Convenience function to make swapping repostiories easier.
This is currently used by mock tests.
TODO: Maybe there is a cleaner way.
"""
attrs = ['repos',
'by_namespace',
'by_path',
'_all_package_names',
'_provider_index']
for attr in attrs:
tmp = getattr(self, attr)
setattr(self, attr, getattr(other, attr))
setattr(other, attr, tmp)
def _add(self, repo):
"""Add a repository to the namespace and path indexes.
Checks for duplicates -- two repos can't have the same root
directory, and they provide have the same namespace.
"""
if repo.root in self.by_path:
raise DuplicateRepoError("Duplicate repository: '%s'" % repo.root)
if repo.namespace in self.by_namespace:
raise DuplicateRepoError(
"Package repos '%s' and '%s' both provide namespace %s."
% (repo.root, self.by_namespace[repo.namespace].root, repo.namespace))
# Add repo to the pkg indexes
self.by_namespace[repo.full_namespace] = repo
self.by_path[repo.root] = repo
# add names to the cached name list
new_pkgs = set(repo.all_package_names())
new_pkgs.update(set(self._all_package_names))
self._all_package_names = sorted(new_pkgs, key=lambda n:n.lower())
def put_first(self, repo):
"""Add repo first in the search path."""
self._add(repo)
self.repos.insert(0, repo)
def put_last(self, repo):
"""Add repo last in the search path."""
self._add(repo)
self.repos.append(repo)
def remove(self, repo):
"""Remove a repo from the search path."""
if repo in self.repos:
self.repos.remove(repo)
def get_repo(self, namespace, default=NOT_PROVIDED):
"""Get a repository by namespace.
Arguments
namespace
Look up this namespace in the RepoPath, and return
it if found.
Optional Arguments
default
If default is provided, return it when the namespace
isn't found. If not, raise an UnknownNamespaceError.
"""
fullspace = '%s.%s' % (self.super_namespace, namespace)
if fullspace not in self.by_namespace:
if default == NOT_PROVIDED:
raise UnknownNamespaceError(namespace)
return default
return self.by_namespace[fullspace]
def first_repo(self):
"""Get the first repo in precedence order."""
return self.repos[0] if self.repos else None
def all_package_names(self):
"""Return all unique package names in all repositories."""
return self._all_package_names
def all_packages(self):
for name in self.all_package_names():
yield self.get(name)
@_autospec
def providers_for(self, vpkg_spec):
if self._provider_index is None:
self._provider_index = ProviderIndex(self.all_package_names())
providers = self._provider_index.providers_for(vpkg_spec)
if not providers:
raise UnknownPackageError(vpkg_spec.name)
return providers
@_autospec
def extensions_for(self, extendee_spec):
return [p for p in self.all_packages() if p.extends(extendee_spec)]
def find_module(self, fullname, path=None):
"""Implements precedence for overlaid namespaces.
Loop checks each namespace in self.repos for packages, and
also handles loading empty containing namespaces.
"""
# namespaces are added to repo, and package modules are leaves.
namespace, dot, module_name = fullname.rpartition('.')
# If it's a module in some repo, or if it is the repo's
# namespace, let the repo handle it.
for repo in self.repos:
if namespace == repo.full_namespace:
if repo.real_name(module_name):
return repo
elif fullname == repo.full_namespace:
return repo
# No repo provides the namespace, but it is a valid prefix of
# something in the RepoPath.
if self.by_namespace.is_prefix(fullname):
return self
return None
def load_module(self, fullname):
"""Handles loading container namespaces when necessary.
See ``Repo`` for how actual package modules are loaded.
"""
if fullname in sys.modules:
return sys.modules[fullname]
# partition fullname into prefix and module name.
namespace, dot, module_name = fullname.rpartition('.')
if not self.by_namespace.is_prefix(fullname):
raise ImportError("No such Spack repo: %s" % fullname)
module = _make_namespace_module(namespace)
module.__loader__ = self
sys.modules[fullname] = module
return module
@_autospec
def repo_for_pkg(self, spec):
"""Given a spec, get the repository for its package."""
# If the spec already has a namespace, then return the
# corresponding repo if we know about it.
if spec.namespace:
fullspace = '%s.%s' % (self.super_namespace, spec.namespace)
if fullspace not in self.by_namespace:
raise UnknownNamespaceError(spec.namespace)
return self.by_namespace[fullspace]
# If there's no namespace, search in the RepoPath.
for repo in self.repos:
if spec.name in repo:
return repo
# If the package isn't in any repo, return the one with
# highest precedence. This is for commands like `spack edit`
# that can operate on packages that don't exist yet.
return self.first_repo()
@_autospec
def get(self, spec, new=False):
"""Find a repo that contains the supplied spec's package.
Raises UnknownPackageError if not found.
"""
return self.repo_for_pkg(spec).get(spec)
@_autospec
def dump_provenance(self, spec, path):
"""Dump provenance information for a spec to a particular path.
This dumps the package file and any associated patch files.
Raises UnknownPackageError if not found.
"""
return self.repo_for_pkg(spec).dump_provenance(spec, path)
def dirname_for_package_name(self, pkg_name):
return self.repo_for_pkg(pkg_name).dirname_for_package_name(pkg_name)
def filename_for_package_name(self, pkg_name):
return self.repo_for_pkg(pkg_name).filename_for_package_name(pkg_name)
def exists(self, pkg_name):
return any(repo.exists(pkg_name) for repo in self.repos)
def __contains__(self, pkg_name):
return self.exists(pkg_name)
class Repo(object):
"""Class representing a package repository in the filesystem.
Each package repository must have a top-level configuration file
called `repo.yaml`.
Currently, `repo.yaml` this must define:
`namespace`:
A Python namespace where the repository's packages should live.
"""
def __init__(self, root, namespace=repo_namespace):
"""Instantiate a package repository from a filesystem path.
Arguments:
root The root directory of the repository.
namespace A super-namespace that will contain the repo-defined
namespace (this is generally jsut `spack.pkg`). The
super-namespace is Spack's way of separating repositories
from other python namespaces.
"""
# Root directory, containing _repo.yaml and package dirs
# Allow roots to by spack-relative by starting with '$spack'
self.root = canonicalize_path(root)
# super-namespace for all packages in the Repo
self.super_namespace = namespace
# check and raise BadRepoError on fail.
def check(condition, msg):
if not condition: raise BadRepoError(msg)
# Validate repository layout.
self.config_file = join_path(self.root, repo_config_name)
check(os.path.isfile(self.config_file),
"No %s found in '%s'" % (repo_config_name, root))
self.packages_path = join_path(self.root, packages_dir_name)
check(os.path.isdir(self.packages_path),
"No directory '%s' found in '%s'" % (repo_config_name, root))
# Read configuration and validate namespace
config = self._read_config()
check('namespace' in config, '%s must define a namespace.'
% join_path(root, repo_config_name))
self.namespace = config['namespace']
check(re.match(r'[a-zA-Z][a-zA-Z0-9_.]+', self.namespace),
("Invalid namespace '%s' in repo '%s'. " % (self.namespace, self.root)) +
"Namespaces must be valid python identifiers separated by '.'")
# Set up 'full_namespace' to include the super-namespace
if self.super_namespace:
self.full_namespace = "%s.%s" % (self.super_namespace, self.namespace)
else:
self.full_namespace = self.namespace
# Keep name components around for checking prefixes.
self._names = self.full_namespace.split('.')
# These are internal cache variables.
self._modules = {}
self._classes = {}
self._instances = {}
self._provider_index = None
self._all_package_names = None
# make sure the namespace for packages in this repo exists.
self._create_namespace()
def _create_namespace(self):
"""Create this repo's namespace module and insert it into sys.modules.
Ensures that modules loaded via the repo have a home, and that
we don't get runtime warnings from Python's module system.
"""
parent = None
for l in range(1, len(self._names)+1):
ns = '.'.join(self._names[:l])
if not ns in sys.modules:
module = _make_namespace_module(ns)
module.__loader__ = self
sys.modules[ns] = module
# Ensure the namespace is an atrribute of its parent,
# if it has not been set by something else already.
#
# This ensures that we can do things like:
# import spack.pkg.builtin.mpich as mpich
if parent:
modname = self._names[l-1]
if not hasattr(parent, modname):
setattr(parent, modname, module)
else:
# no need to set up a module, but keep track of the parent.
module = sys.modules[ns]
parent = module
def real_name(self, import_name):
"""Allow users to import Spack packages using Python identifiers.
A python identifier might map to many different Spack package
names due to hyphen/underscore ambiguity.
Easy example:
num3proxy -> 3proxy
Ambiguous:
foo_bar -> foo_bar, foo-bar
More ambiguous:
foo_bar_baz -> foo_bar_baz, foo-bar-baz, foo_bar-baz, foo-bar_baz
"""
if import_name in self:
return import_name
options = possible_spack_module_names(import_name)
options.remove(import_name)
for name in options:
if name in self:
return name
return None
def is_prefix(self, fullname):
"""True if fullname is a prefix of this Repo's namespace."""
parts = fullname.split('.')
return self._names[:len(parts)] == parts
def find_module(self, fullname, path=None):
"""Python find_module import hook.
Returns this Repo if it can load the module; None if not.
"""
if self.is_prefix(fullname):
return self
namespace, dot, module_name = fullname.rpartition('.')
if namespace == self.full_namespace:
if self.real_name(module_name):
return self
return None
def load_module(self, fullname):
"""Python importer load hook.
Tries to load the module; raises an ImportError if it can't.
"""
if fullname in sys.modules:
return sys.modules[fullname]
namespace, dot, module_name = fullname.rpartition('.')
if self.is_prefix(fullname):
module = _make_namespace_module(fullname)
elif namespace == self.full_namespace:
real_name = self.real_name(module_name)
if not real_name:
raise ImportError("No module %s in %s" % (module_name, self))
module = self._get_pkg_module(real_name)
else:
raise ImportError("No module %s in %s" % (fullname, self))
module.__loader__ = self
sys.modules[fullname] = module
return module
def _read_config(self):
"""Check for a YAML config file in this db's root directory."""
try:
with open(self.config_file) as reponame_file:
yaml_data = yaml.load(reponame_file)
if (not yaml_data or 'repo' not in yaml_data or
not isinstance(yaml_data['repo'], dict)):
tty.die("Invalid %s in repository %s"
% (repo_config_name, self.root))
return yaml_data['repo']
except exceptions.IOError, e:
tty.die("Error reading %s when opening %s"
% (self.config_file, self.root))
@_autospec
def get(self, spec, new=False):
if spec.virtual:
raise UnknownPackageError(spec.name)
if spec.namespace and spec.namespace != self.namespace:
raise UnknownPackageError("Repository %s does not contain package %s."
% (self.namespace, spec.fullname))
key = hash(spec)
if new or key not in self._instances:
package_class = self._get_pkg_class(spec.name)
try:
copy = spec.copy() # defensive copy. Package owns its spec.
self._instances[key] = package_class(copy)
except Exception, e:
if spack.debug:
sys.excepthook(*sys.exc_info())
raise FailedConstructorError(spec.fullname, *sys.exc_info())
return self._instances[key]
@_autospec
def dump_provenance(self, spec, path):
"""Dump provenance information for a spec to a particular path.
This dumps the package file and any associated patch files.
Raises UnknownPackageError if not found.
"""
# Some preliminary checks.
if spec.virtual:
raise UnknownPackageError(spec.name)
if spec.namespace and spec.namespace != self.namespace:
raise UnknownPackageError("Repository %s does not contain package %s."
% (self.namespace, spec.fullname))
# Install any patch files needed by packages.
mkdirp(path)
for spec, patches in spec.package.patches.items():
for patch in patches:
if patch.path:
if os.path.exists(patch.path):
install(patch.path, path)
else:
tty.warn("Patch file did not exist: %s" % patch.path)
# Install the package.py file itself.
install(self.filename_for_package_name(spec), path)
def purge(self):
"""Clear entire package instance cache."""
self._instances.clear()
@_autospec
def providers_for(self, vpkg_spec):
if self._provider_index is None:
self._provider_index = ProviderIndex(self.all_package_names())
providers = self._provider_index.providers_for(vpkg_spec)
if not providers:
raise UnknownPackageError(vpkg_spec.name)
return providers
@_autospec
def extensions_for(self, extendee_spec):
return [p for p in self.all_packages() if p.extends(extendee_spec)]
def _check_namespace(self, spec):
"""Check that the spec's namespace is the same as this repository's."""
if spec.namespace and spec.namespace != self.namespace:
raise UnknownNamespaceError(spec.namespace)
@_autospec
def dirname_for_package_name(self, spec):
"""Get the directory name for a particular package. This is the
directory that contains its package.py file."""
self._check_namespace(spec)
return join_path(self.packages_path, spec.name)
@_autospec
def filename_for_package_name(self, spec):
"""Get the filename for the module we should load for a particular
package. Packages for a Repo live in
``$root/<package_name>/package.py``
This will return a proper package.py path even if the
package doesn't exist yet, so callers will need to ensure
the package exists before importing.
"""
self._check_namespace(spec)
pkg_dir = self.dirname_for_package_name(spec.name)
return join_path(pkg_dir, package_file_name)
def all_package_names(self):
"""Returns a sorted list of all package names in the Repo."""
if self._all_package_names is None:
self._all_package_names = []
for pkg_name in os.listdir(self.packages_path):
# Skip non-directories in the package root.
pkg_dir = join_path(self.packages_path, pkg_name)
if not os.path.isdir(pkg_dir):
continue
# Skip directories without a package.py in them.
pkg_file = join_path(self.packages_path, pkg_name, package_file_name)
if not os.path.isfile(pkg_file):
continue
# Warn about invalid names that look like packages.
if not valid_module_name(pkg_name):
tty.warn("Skipping package at %s. '%s' is not a valid Spack module name."
% (pkg_dir, pkg_name))
continue
# All checks passed. Add it to the list.
self._all_package_names.append(pkg_name)
self._all_package_names.sort()
return self._all_package_names
def all_packages(self):
for name in self.all_package_names():
yield self.get(name)
def exists(self, pkg_name):
"""Whether a package with the supplied name exists."""
# This does a binary search in the sorted list.
idx = bisect_left(self.all_package_names(), pkg_name)
return (idx < len(self._all_package_names) and
self._all_package_names[idx] == pkg_name)
def _get_pkg_module(self, pkg_name):
"""Create a module for a particular package.
This caches the module within this Repo *instance*. It does
*not* add it to ``sys.modules``. So, you can construct
multiple Repos for testing and ensure that the module will be
loaded once per repo.
"""
if pkg_name not in self._modules:
file_path = self.filename_for_package_name(pkg_name)
if not os.path.exists(file_path):
raise UnknownPackageError(pkg_name, self)
if not os.path.isfile(file_path):
tty.die("Something's wrong. '%s' is not a file!" % file_path)
if not os.access(file_path, os.R_OK):
tty.die("Cannot read '%s'!" % file_path)
# e.g., spack.pkg.builtin.mpich
fullname = "%s.%s" % (self.full_namespace, pkg_name)
module = imp.load_source(fullname, file_path)
module.__package__ = self.full_namespace
module.__loader__ = self
self._modules[pkg_name] = module
return self._modules[pkg_name]
def _get_pkg_class(self, pkg_name):
"""Get the class for the package out of its module.
First loads (or fetches from cache) a module for the
package. Then extracts the package class from the module
according to Spack's naming convention.
"""
class_name = mod_to_class(pkg_name)
module = self._get_pkg_module(pkg_name)
cls = getattr(module, class_name)
if not inspect.isclass(cls):
tty.die("%s.%s is not a class" % (pkg_name, class_name))
return cls
def __str__(self):
return "[Repo '%s' at '%s']" % (self.namespace, self.root)
def __repr__(self):
return self.__str__()
def __contains__(self, pkg_name):
return self.exists(pkg_name)
def create_repo(root, namespace=None):
"""Create a new repository in root with the specified namespace.
If the namespace is not provided, use basename of root.
Return the canonicalized path and the namespace of the created repository.
"""
root = canonicalize_path(root)
if not namespace:
namespace = os.path.basename(root)
if not re.match(r'\w[\.\w-]*', namespace):
raise InvalidNamespaceError("'%s' is not a valid namespace." % namespace)
existed = False
if os.path.exists(root):
if os.path.isfile(root):
raise BadRepoError('File %s already exists and is not a directory' % root)
elif os.path.isdir(root):
if not os.access(root, os.R_OK | os.W_OK):
raise BadRepoError('Cannot create new repo in %s: cannot access directory.' % root)
if os.listdir(root):
raise BadRepoError('Cannot create new repo in %s: directory is not empty.' % root)
existed = True
full_path = os.path.realpath(root)
parent = os.path.dirname(full_path)
if not os.access(parent, os.R_OK | os.W_OK):
raise BadRepoError("Cannot create repository in %s: can't access parent!" % root)
try:
config_path = os.path.join(root, repo_config_name)
packages_path = os.path.join(root, packages_dir_name)
mkdirp(packages_path)
with open(config_path, 'w') as config:
config.write("repo:\n")
config.write(" namespace: '%s'\n" % namespace)
except (IOError, OSError) as e:
raise BadRepoError('Failed to create new repository in %s.' % root,
"Caused by %s: %s" % (type(e), e))
# try to clean up.
if existed:
shutil.rmtree(config_path, ignore_errors=True)
shutil.rmtree(packages_path, ignore_errors=True)
else:
shutil.rmtree(root, ignore_errors=True)
return full_path, namespace
class RepoError(spack.error.SpackError):
"""Superclass for repository-related errors."""
class NoRepoConfiguredError(RepoError):
"""Raised when there are no repositories configured."""
class InvalidNamespaceError(RepoError):
"""Raised when an invalid namespace is encountered."""
class BadRepoError(RepoError):
"""Raised when repo layout is invalid."""
class DuplicateRepoError(RepoError):
"""Raised when duplicate repos are added to a RepoPath."""
class PackageLoadError(spack.error.SpackError):
"""Superclass for errors related to loading packages."""
class UnknownPackageError(PackageLoadError):
"""Raised when we encounter a package spack doesn't have."""
def __init__(self, name, repo=None):
msg = None
if repo:
msg = "Package %s not found in repository %s." % (name, repo)
else:
msg = "Package %s not found." % name
super(UnknownPackageError, self).__init__(msg)
self.name = name
class UnknownNamespaceError(PackageLoadError):
"""Raised when we encounter an unknown namespace"""
def __init__(self, namespace):
super(UnknownNamespaceError, self).__init__(
"Unknown namespace: %s" % namespace)
class FailedConstructorError(PackageLoadError):
"""Raised when a package's class constructor fails."""
def __init__(self, name, exc_type, exc_obj, exc_tb):
super(FailedConstructorError, self).__init__(
"Class constructor failed for package '%s'." % name,
'\nCaused by:\n' +
('%s: %s\n' % (exc_type.__name__, exc_obj)) +
''.join(traceback.format_tb(exc_tb)))
self.name = name
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