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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://scalability-llnl.github.io/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
##############################################################################
"""
Spack allows very fine-grained control over how packages are installed and
over how they are built and configured. To make this easy, it has its own
syntax for declaring a dependence. We call a descriptor of a particular
package configuration a "spec".
The syntax looks like this:
.. code-block:: sh
$ spack install mpileaks ^openmpi @1.2:1.4 +debug %intel @12.1 =bgqos_0
0 1 2 3 4 5 6
The first part of this is the command, 'spack install'. The rest of the
line is a spec for a particular installation of the mpileaks package.
0. The package to install
1. A dependency of the package, prefixed by ^
2. A version descriptor for the package. This can either be a specific
version, like "1.2", or it can be a range of versions, e.g. "1.2:1.4".
If multiple specific versions or multiple ranges are acceptable, they
can be separated by commas, e.g. if a package will only build with
versions 1.0, 1.2-1.4, and 1.6-1.8 of mavpich, you could say:
depends_on("mvapich@1.0,1.2:1.4,1.6:1.8")
3. A compile-time variant of the package. If you need openmpi to be
built in debug mode for your package to work, you can require it by
adding +debug to the openmpi spec when you depend on it. If you do
NOT want the debug option to be enabled, then replace this with -debug.
4. The name of the compiler to build with.
5. The versions of the compiler to build with. Note that the identifier
for a compiler version is the same '@' that is used for a package version.
A version list denoted by '@' is associated with the compiler only if
if it comes immediately after the compiler name. Otherwise it will be
associated with the current package spec.
6. The architecture to build with. This is needed on machines where
cross-compilation is required
Here is the EBNF grammar for a spec::
spec-list = { spec [ dep-list ] }
dep_list = { ^ spec }
spec = id [ options ]
options = { @version-list | +variant | -variant | ~variant |
%compiler | =architecture }
variant = id
architecture = id
compiler = id [ version-list ]
version-list = version [ { , version } ]
version = id | id: | :id | id:id
id = [A-Za-z0-9_][A-Za-z0-9_.-]*
There is one context-sensitive part: ids in versions may contain '.', while
other ids may not.
There is one ambiguity: since '-' is allowed in an id, you need to put
whitespace space before -variant for it to be tokenized properly. You can
either use whitespace, or you can just use ~variant since it means the same
thing. Spack uses ~variant in directory names and in the canonical form of
specs to avoid ambiguity. Both are provided because ~ can cause shell
expansion when it is the first character in an id typed on the command line.
"""
import sys
import itertools
import hashlib
from StringIO import StringIO
import llnl.util.tty as tty
from llnl.util.lang import *
from llnl.util.tty.color import *
import spack
import spack.parse
import spack.error
import spack.compilers
import spack.compilers.gcc
from spack.version import *
from spack.util.string import *
from spack.util.prefix import Prefix
from spack.virtual import ProviderIndex
# Convenient names for color formats so that other things can use them
compiler_color = '@g'
version_color = '@c'
architecture_color = '@m'
enabled_variant_color = '@B'
disabled_variant_color = '@r'
dependency_color = '@.'
"""This map determines the coloring of specs when using color output.
We make the fields different colors to enhance readability.
See spack.color for descriptions of the color codes. """
color_formats = {'%' : compiler_color,
'@' : version_color,
'=' : architecture_color,
'+' : enabled_variant_color,
'~' : disabled_variant_color,
'^' : dependency_color }
"""Regex used for splitting by spec field separators."""
_separators = '[%s]' % ''.join(color_formats.keys())
"""Versionlist constant so we don't have to build a list
every time we call str()"""
_any_version = VersionList([':'])
def index_specs(specs):
"""Take a list of specs and return a dict of lists. Dict is
keyed by spec name and lists include all specs with the
same name.
"""
spec_dict = {}
for spec in specs:
if not spec.name in spec_dict:
spec_dict[spec.name] = []
spec_dict[spec.name].append(spec)
return spec_dict
def colorize_spec(spec):
"""Returns a spec colorized according to the colors specified in
color_formats."""
class insert_color:
def __init__(self):
self.last = None
def __call__(self, match):
# ignore compiler versions (color same as compiler)
sep = match.group(0)
if self.last == '%' and sep == '@':
return cescape(sep)
self.last = sep
return '%s%s' % (color_formats[sep], cescape(sep))
return colorize(re.sub(_separators, insert_color(), str(spec)) + '@.')
@key_ordering
class Compiler(object):
"""The Compiler field represents the compiler or range of compiler
versions that a package should be built with. Compilers have a
name and a version list. """
def __init__(self, *args):
nargs = len(args)
if nargs == 1:
# If there is one argument, it's a spec to parse
c = SpecParser().parse_compiler(args[0])
self.name = c.name
self.versions = c.versions
elif nargs == 2:
name, version = args
self.name = name
self.versions = VersionList()
self.versions.add(ver(version))
else:
raise TypeError(
"__init__ takes 1 or 2 arguments. (%d given)" % nargs)
def _add_version(self, version):
self.versions.add(version)
def _autospec(self, compiler_spec_like):
if not isinstance(compiler_spec_like, Compiler):
return Compiler(compiler_spec_like)
return compiler_spec_like
def satisfies(self, other):
other = self._autospec(other)
return (self.name == other.name and
self.versions.overlaps(other.versions))
def constrain(self, other):
other = self._autospec(other)
if not self.satisfies(other):
raise UnsatisfiableCompilerSpecError(self, other)
self.versions.intersect(other.versions)
@property
def concrete(self):
"""A Compiler spec is concrete if its versions are concrete."""
return self.versions.concrete
@property
def version(self):
if not self.concrete:
raise SpecError("Spec is not concrete: " + str(self))
return self.versions[0]
def copy(self):
clone = Compiler.__new__(Compiler)
clone.name = self.name
clone.versions = self.versions.copy()
return clone
def _cmp_key(self):
return (self.name, self.versions)
def __str__(self):
out = self.name
if self.versions and self.versions != _any_version:
vlist = ",".join(str(v) for v in self.versions)
out += "@%s" % vlist
return out
@key_ordering
class Variant(object):
"""Variants are named, build-time options for a package. Names depend
on the particular package being built, and each named variant can
be enabled or disabled.
"""
def __init__(self, name, enabled):
self.name = name
self.enabled = enabled
def _cmp_key(self):
return (self.name, self.enabled)
def copy(self):
return Variant(self.name, self.enabled)
def __str__(self):
out = '+' if self.enabled else '~'
return out + self.name
class VariantMap(HashableMap):
def satisfies(self, other):
return all(self[key].enabled == other[key].enabled
for key in other if key in self)
def __str__(self):
sorted_keys = sorted(self.keys())
return ''.join(str(self[key]) for key in sorted_keys)
class DependencyMap(HashableMap):
"""Each spec has a DependencyMap containing specs for its dependencies.
The DependencyMap is keyed by name. """
@property
def concrete(self):
return all(d.concrete for d in self.values())
def __str__(self):
sorted_dep_names = sorted(self.keys())
return ''.join(
["^" + str(self[name]) for name in sorted_dep_names])
@key_ordering
class Spec(object):
def __init__(self, spec_like, *dep_like, **kwargs):
# Copy if spec_like is a Spec.
if isinstance(spec_like, Spec):
self._dup(spec_like)
return
# Parse if the spec_like is a string.
if not isinstance(spec_like, basestring):
raise TypeError("Can't make spec out of %s" % type(spec_like))
spec_list = SpecParser().parse(spec_like)
if len(spec_list) > 1:
raise ValueError("More than one spec in string: " + spec_like)
if len(spec_list) < 1:
raise ValueError("String contains no specs: " + spec_like)
# Take all the attributes from the first parsed spec without copying.
# This is safe b/c we throw out the parsed spec. It's a bit nasty,
# but it's nastier to implement the constructor so that the parser
# writes directly into this Spec object.
other = spec_list[0]
self.name = other.name
self.dependents = other.dependents
self.versions = other.versions
self.variants = other.variants
self.architecture = other.architecture
self.compiler = other.compiler
self.dependencies = other.dependencies
# This allows users to construct a spec DAG with literals.
# Note that given two specs a and b, Spec(a) copies a, but
# Spec(a, b) will copy a but just add b as a dep.
for dep in dep_like:
spec = dep if isinstance(dep, Spec) else Spec(dep)
self._add_dependency(spec)
#
# Private routines here are called by the parser when building a spec.
#
def _add_version(self, version):
"""Called by the parser to add an allowable version."""
self.versions.add(version)
def _add_variant(self, name, enabled):
"""Called by the parser to add a variant."""
if name in self.variants: raise DuplicateVariantError(
"Cannot specify variant '%s' twice" % name)
self.variants[name] = Variant(name, enabled)
def _set_compiler(self, compiler):
"""Called by the parser to set the compiler."""
if self.compiler: raise DuplicateCompilerError(
"Spec for '%s' cannot have two compilers." % self.name)
self.compiler = compiler
def _set_architecture(self, architecture):
"""Called by the parser to set the architecture."""
if self.architecture: raise DuplicateArchitectureError(
"Spec for '%s' cannot have two architectures." % self.name)
self.architecture = architecture
def _add_dependency(self, spec):
"""Called by the parser to add another spec as a dependency."""
if spec.name in self.dependencies:
raise DuplicateDependencyError("Cannot depend on '%s' twice" % spec)
self.dependencies[spec.name] = spec
spec.dependents[self.name] = self
@property
def root(self):
"""Follow dependent links and find the root of this spec's DAG.
In spack specs, there should be a single root (the package being
installed). This will throw an assertion error if that is not
the case.
"""
if not self.dependents:
return self
# If the spec has multiple dependents, ensure that they all
# lead to the same place. Spack shouldn't deal with any DAGs
# with multiple roots, so something's wrong if we find one.
depiter = iter(self.dependents.values())
first_root = next(depiter).root
assert(all(first_root is d.root for d in depiter))
return first_root
@property
def package(self):
return spack.db.get(self)
@property
def virtual(self):
"""Right now, a spec is virtual if no package exists with its name.
TODO: revisit this -- might need to use a separate namespace and
be more explicit about this.
Possible idea: just use conventin and make virtual deps all
caps, e.g., MPI vs mpi.
"""
return not spack.db.exists(self.name)
@property
def concrete(self):
"""A spec is concrete if it can describe only ONE build of a package.
If any of the name, version, architecture, compiler, or depdenencies
are ambiguous,then it is not concrete.
"""
return bool(not self.virtual
and self.versions.concrete
and self.architecture
and self.compiler and self.compiler.concrete
and self.dependencies.concrete)
def preorder_traversal(self, visited=None, d=0, **kwargs):
"""Generic preorder traversal of the DAG represented by this spec.
This will yield each node in the spec. Options:
cover [=nodes|edges|paths]
Determines how extensively to cover the dag. Possible vlaues:
'nodes': Visit each node in the dag only once. Every node
yielded by this function will be unique.
'edges': If a node has been visited once but is reached along a
new path from the root, yield it but do not descend
into it. This traverses each 'edge' in the DAG once.
'paths': Explore every unique path reachable from the root.
This descends into visited subtrees and will yield
nodes twice if they're reachable by multiple paths.
depth [=False]
Defaults to False. When True, yields not just nodes in the
spec, but also their depth from the root in a (depth, node)
tuple.
keyfun [=id]
Allow a custom key function to track the identity of nodes
in the traversal.
root [=True]
If false, this won't yield the root node, just its descendents.
direction [=children|parents]
If 'children', does a traversal of this spec's children. If
'parents', traverses upwards in the DAG towards the root.
"""
depth = kwargs.get('depth', False)
key_fun = kwargs.get('key', id)
yield_root = kwargs.get('root', True)
cover = kwargs.get('cover', 'nodes')
direction = kwargs.get('direction', 'children')
cover_values = ('nodes', 'edges', 'paths')
if cover not in cover_values:
raise ValueError("Invalid value for cover: %s. Choices are %s"
% (cover, ",".join(cover_values)))
direction_values = ('children', 'parents')
if direction not in direction_values:
raise ValueError("Invalid value for direction: %s. Choices are %s"
% (direction, ",".join(direction_values)))
if visited is None:
visited = set()
result = (d, self) if depth else self
key = key_fun(self)
if key in visited:
if cover == 'nodes': return
if yield_root or d > 0: yield result
if cover == 'edges': return
else:
if yield_root or d > 0: yield result
successors = self.dependencies
if direction == 'parents':
successors = self.dependents
visited.add(key)
for name in sorted(successors):
child = successors[name]
for elt in child.preorder_traversal(visited, d+1, **kwargs):
yield elt
@property
def short_spec(self):
"""Returns a version of the spec with the dependencies hashed
instead of completely enumerated."""
return self.format('$_$@$%@$+$=$#')
@property
def prefix(self):
return Prefix(spack.install_layout.path_for_spec(self))
def dep_hash(self, length=None):
"""Return a hash representing the dependencies of this spec
This will always normalize first so that the hash is consistent.
"""
self.normalize()
sha = hashlib.sha1()
sha.update(str(self.dependencies))
full_hash = sha.hexdigest()
return full_hash[:length]
def _concretize_helper(self, presets=None, visited=None):
"""Recursive helper function for concretize().
This concretizes everything bottom-up. As things are
concretized, they're added to the presets, and ancestors
will prefer the settings of their children.
"""
if presets is None: presets = {}
if visited is None: visited = set()
if self.name in visited:
return
# Concretize deps first -- this is a bottom-up process.
for name in sorted(self.dependencies.keys()):
self.dependencies[name]._concretize_helper(presets, visited)
if self.name in presets:
self.constrain(presets[self.name])
else:
# Concretize virtual dependencies last. Because they're added
# to presets below, their constraints will all be merged, but we'll
# still need to select a concrete package later.
if not self.virtual:
spack.concretizer.concretize_architecture(self)
spack.concretizer.concretize_compiler(self)
spack.concretizer.concretize_version(self)
presets[self.name] = self
visited.add(self.name)
def _replace_with(self, concrete):
"""Replace this virtual spec with a concrete spec."""
assert(self.virtual)
for name, dependent in self.dependents.items():
del dependent.dependencies[self.name]
dependent._add_dependency(concrete)
def _expand_virtual_packages(self):
"""Find virtual packages in this spec, replace them with providers,
and normalize again to include the provider's (potentially virtual)
dependencies. Repeat until there are no virtual deps.
Precondition: spec is normalized.
.. todo::
If a provider depends on something that conflicts with
other dependencies in the spec being expanded, this can
produce a conflicting spec. For example, if mpich depends
on hwloc@:1.3 but something in the spec needs hwloc1.4:,
then we should choose an MPI other than mpich. Cases like
this are infrequent, but should implement this before it is
a problem.
"""
while True:
virtuals =[v for v in self.preorder_traversal() if v.virtual]
if not virtuals:
return
for spec in virtuals:
providers = spack.db.providers_for(spec)
concrete = spack.concretizer.choose_provider(spec, providers)
concrete = concrete.copy()
spec._replace_with(concrete)
# If there are duplicate providers or duplicate provider deps, this
# consolidates them and merges constraints.
self.normalize()
def concretize(self):
"""A spec is concrete if it describes one build of a package uniquely.
This will ensure that this spec is concrete.
If this spec could describe more than one version, variant, or build
of a package, this will add constraints to make it concrete.
Some rigorous validation and checks are also performed on the spec.
Concretizing ensures that it is self-consistent and that it's consistent
with requirements of its pacakges. See flatten() and normalize() for
more details on this.
"""
self.normalize()
self._expand_virtual_packages()
self._concretize_helper()
def concretized(self):
"""This is a non-destructive version of concretize(). First clones,
then returns a concrete version of this package without modifying
this package. """
clone = self.copy()
clone.concretize()
return clone
def flat_dependencies(self):
"""Return a DependencyMap containing all of this spec's dependencies
with their constraints merged. If there are any conflicts, throw
an exception.
This will work even on specs that are not normalized; i.e. specs
that have two instances of the same dependency in the DAG.
This is used as the first step of normalization.
"""
# This ensures that the package descriptions themselves are consistent
if not self.virtual:
self.package.validate_dependencies()
# Once that is guaranteed, we know any constraint violations are due
# to the spec -- so they're the user's fault, not Spack's.
flat_deps = DependencyMap()
try:
for spec in self.preorder_traversal():
if spec.name not in flat_deps:
new_spec = spec.copy(dependencies=False)
flat_deps[spec.name] = new_spec
else:
flat_deps[spec.name].constrain(spec)
except UnsatisfiableSpecError, e:
# This REALLY shouldn't happen unless something is wrong in spack.
# It means we got a spec DAG with two instances of the same package
# that had inconsistent constraints. There's no way for a user to
# produce a spec like this (the parser adds all deps to the root),
# so this means OUR code is not sane!
raise InconsistentSpecError("Invalid Spec DAG: %s" % e.message)
return flat_deps
def flatten(self):
"""Pull all dependencies up to the root (this spec).
Merge constraints for dependencies with the same name, and if they
conflict, throw an exception. """
self.dependencies = self.flat_dependencies()
def _normalize_helper(self, visited, spec_deps, provider_index):
"""Recursive helper function for _normalize."""
if self.name in visited:
return
visited.add(self.name)
# if we descend into a virtual spec, there's nothing more
# to normalize. Concretize will finish resolving it later.
if self.virtual:
return
# Combine constraints from package dependencies with
# constraints on the spec's dependencies.
pkg = spack.db.get(self.name)
for name, pkg_dep in self.package.dependencies.items():
# If it's a virtual dependency, try to find a provider
if pkg_dep.virtual:
providers = provider_index.providers_for(pkg_dep)
# If there is a provider for the vpkg, then use that instead of
# the virtual package.
if providers:
# Can't have multiple providers for the same thing in one spec.
if len(providers) > 1:
raise MultipleProviderError(pkg_dep, providers)
pkg_dep = providers[0]
name = pkg_dep.name
else:
# The user might have required something insufficient for
# pkg_dep -- so we'll get a conflict. e.g., user asked for
# mpi@:1.1 but some package required mpi@2.1:.
required = provider_index.providers_for(name)
if len(required) > 1:
raise MultipleProviderError(pkg_dep, required)
elif required:
raise UnsatisfiableProviderSpecError(
required[0], pkg_dep)
else:
# if it's a real dependency, check whether it provides something
# already required in the spec.
index = ProviderIndex([pkg_dep], restrict=True)
for vspec in (v for v in spec_deps.values() if v.virtual):
if index.providers_for(vspec):
vspec._replace_with(pkg_dep)
del spec_deps[vspec.name]
else:
required = index.providers_for(vspec.name)
if required:
raise UnsatisfiableProviderSpecError(
required[0], pkg_dep)
provider_index.update(pkg_dep)
if name not in spec_deps:
# If the spec doesn't reference a dependency that this package
# needs, then clone it from the package description.
spec_deps[name] = pkg_dep.copy()
try:
# Constrain package information with spec info
spec_deps[name].constrain(pkg_dep)
except UnsatisfiableSpecError, e:
e.message = "Invalid spec: '%s'. "
e.message += "Package %s requires %s %s, but spec asked for %s"
e.message %= (spec_deps[name], name, e.constraint_type,
e.required, e.provided)
raise e
# Add merged spec to my deps and recurse
dependency = spec_deps[name]
self._add_dependency(dependency)
dependency._normalize_helper(visited, spec_deps, provider_index)
def normalize(self):
"""When specs are parsed, any dependencies specified are hanging off
the root, and ONLY the ones that were explicitly provided are there.
Normalization turns a partial flat spec into a DAG, where:
1. ALL dependencies of the root package are in the DAG.
2. Each node's dependencies dict only contains its direct deps.
3. There is only ONE unique spec for each package in the DAG.
* This includes virtual packages. If there a non-virtual
package that provides a virtual package that is in the spec,
then we replace the virtual package with the non-virtual one.
4. The spec DAG matches package DAG.
TODO: normalize should probably implement some form of cycle detection,
to ensure that the spec is actually a DAG.
"""
# Ensure first that all packages & compilers in the DAG exist.
self.validate_names()
# Then ensure that the packages referenced are sane, that the
# provided spec is sane, and that all dependency specs are in the
# root node of the spec. flat_dependencies will do this for us.
spec_deps = self.flat_dependencies()
self.dependencies.clear()
# Figure out which of the user-provided deps provide virtual deps.
# Remove virtual deps that are already provided by something in the spec
spec_packages = [d.package for d in spec_deps.values() if not d.virtual]
index = ProviderIndex(spec_deps.values(), restrict=True)
visited = set()
self._normalize_helper(visited, spec_deps, index)
# If there are deps specified but not visited, they're not
# actually deps of this package. Raise an error.
extra = set(spec_deps.viewkeys()).difference(visited)
# Also subtract out all the packags that provide a needed vpkg
vdeps = [v for v in self.package.virtual_dependencies()]
vpkg_providers = index.providers_for(*vdeps)
extra.difference_update(p.name for p in vpkg_providers)
# Anything left over is not a valid part of the spec.
if extra:
raise InvalidDependencyException(
self.name + " does not depend on " + comma_or(extra))
def normalized(self):
"""Return a normalized copy of this spec without modifying this spec."""
clone = self.copy()
clone.normalized()
return clone
def validate_names(self):
"""This checks that names of packages and compilers in this spec are real.
If they're not, it will raise either UnknownPackageError or
UnsupportedCompilerError.
"""
for spec in self.preorder_traversal():
# Don't get a package for a virtual name.
if not spec.virtual:
spack.db.get(spec.name)
# validate compiler in addition to the package name.
if spec.compiler:
if not spack.compilers.supported(spec.compiler):
raise UnsupportedCompilerError(spec.compiler.name)
def constrain(self, other, **kwargs):
other = self._autospec(other)
if not self.name == other.name:
raise UnsatisfiableSpecNameError(self.name, other.name)
if not self.versions.overlaps(other.versions):
raise UnsatisfiableVersionSpecError(self.versions, other.versions)
for v in other.variants:
if (v in self.variants and
self.variants[v].enabled != other.variants[v].enabled):
raise UnsatisfiableVariantSpecError(self.variants[v],
other.variants[v])
if self.architecture is not None and other.architecture is not None:
if self.architecture != other.architecture:
raise UnsatisfiableArchitectureSpecError(self.architecture,
other.architecture)
if self.compiler is not None and other.compiler is not None:
self.compiler.constrain(other.compiler)
elif self.compiler is None:
self.compiler = other.compiler
self.versions.intersect(other.versions)
self.variants.update(other.variants)
self.architecture = self.architecture or other.architecture
if kwargs.get('deps', True):
self._constrain_dependencies(other)
def _constrain_dependencies(self, other):
"""Apply constraints of other spec's dependencies to this spec."""
if not self.dependencies or not other.dependencies:
return
# TODO: might want more detail than this, e.g. specific deps
# in violation. if this becomes a priority get rid of this
# check and be more specici about what's wrong.
if not self.satisfies_dependencies(other):
raise UnsatisfiableDependencySpecError(self, other)
# Handle common first-order constraints directly
for name in self.common_dependencies(other):
self[name].constrain(other[name], deps=False)
# Update with additional constraints from other spec
for name in other.dep_difference(self):
self._add_dependency(other[name].copy())
def common_dependencies(self, other):
"""Return names of dependencies that self an other have in common."""
common = set(
s.name for s in self.preorder_traversal(root=False))
common.intersection_update(
s.name for s in other.preorder_traversal(root=False))
return common
def dep_difference(self, other):
"""Returns dependencies in self that are not in other."""
mine = set(s.name for s in self.preorder_traversal(root=False))
mine.difference_update(
s.name for s in other.preorder_traversal(root=False))
return mine
def _autospec(self, spec_like):
"""Used to convert arguments to specs. If spec_like is a spec, returns it.
If it's a string, tries to parse a string. If that fails, tries to parse
a local spec from it (i.e. name is assumed to be self's name).
"""
if isinstance(spec_like, spack.spec.Spec):
return spec_like
try:
return spack.spec.Spec(spec_like)
except SpecError:
return parse_anonymous_spec(spec_like, self.name)
def satisfies(self, other, **kwargs):
other = self._autospec(other)
# First thing we care about is whether the name matches
if self.name != other.name:
return False
# This function simplifies null checking below
def check(attribute, op):
s = getattr(self, attribute)
o = getattr(other, attribute)
return not s or not o or op(s,o)
# All these attrs have satisfies criteria of their own
for attr in ('versions', 'variants', 'compiler'):
if not check(attr, lambda s, o: s.satisfies(o)):
return False
# Architecture is just a string
# TODO: inviestigate making an Architecture class for symmetry
if not check('architecture', lambda s,o: s == o):
return False
if kwargs.get('deps', True):
return self.satisfies_dependencies(other)
else:
return True
def satisfies_dependencies(self, other):
"""This checks constraints on common dependencies against each other."""
# if either spec doesn't restrict dependencies then both are compatible.
if not self.dependencies or not other.dependencies:
return True
# Handle first-order constraints directly
for name in self.common_dependencies(other):
if not self[name].satisfies(other[name]):
return False
# For virtual dependencies, we need to dig a little deeper.
self_index = ProviderIndex(self.preorder_traversal(), restrict=True)
other_index = ProviderIndex(other.preorder_traversal(), restrict=True)
# This handles cases where there are already providers for both vpkgs
if not self_index.satisfies(other_index):
return False
# These two loops handle cases where there is an overly restrictive vpkg
# in one spec for a provider in the other (e.g., mpi@3: is not compatible
# with mpich2)
for spec in self.virtual_dependencies():
if spec.name in other_index and not other_index.providers_for(spec):
return False
for spec in other.virtual_dependencies():
if spec.name in self_index and not self_index.providers_for(spec):
return False
return True
def virtual_dependencies(self):
"""Return list of any virtual deps in this spec."""
return [spec for spec in self.preorder_traversal() if spec.virtual]
def _dup(self, other, **kwargs):
"""Copy the spec other into self. This is an overwriting
copy. It does not copy any dependents (parents), but by default
copies dependencies.
To duplicate an entire DAG, call _dup() on the root of the DAG.
Options:
dependencies[=True]
Whether deps should be copied too. Set to false to copy a
spec but not its dependencies.
"""
# TODO: this needs to handle DAGs.
self.name = other.name
self.versions = other.versions.copy()
self.variants = other.variants.copy()
self.architecture = other.architecture
self.compiler = None
if other.compiler:
self.compiler = other.compiler.copy()
self.dependents = DependencyMap()
copy_deps = kwargs.get('dependencies', True)
if copy_deps:
self.dependencies = other.dependencies.copy()
else:
self.dependencies = DependencyMap()
def copy(self, **kwargs):
"""Return a copy of this spec.
By default, returns a deep copy. Supply dependencies=False
to get a shallow copy.
"""
clone = Spec.__new__(Spec)
clone._dup(self, **kwargs)
return clone
@property
def version(self):
if not self.versions.concrete:
raise SpecError("Spec version is not concrete: " + str(self))
return self.versions[0]
def __getitem__(self, name):
"""TODO: reconcile __getitem__, _add_dependency, __contains__"""
for spec in self.preorder_traversal():
if spec.name == name:
return spec
raise KeyError("No spec with name %s in %s" % (name, self))
def __contains__(self, spec):
"""True if this spec has any dependency that satisfies the supplied
spec."""
spec = self._autospec(spec)
for s in self.preorder_traversal():
if s.satisfies(spec):
return True
return False
def _cmp_key(self):
return (self.name, self.versions, self.variants,
self.architecture, self.compiler, self.dependencies)
def colorized(self):
return colorize_spec(self)
def format(self, format_string='$_$@$%@$+$=', **kwargs):
"""Prints out particular pieces of a spec, depending on what is
in the format string. The format strings you can provide are::
$_ Package name
$@ Version
$% Compiler
$%@ Compiler & compiler version
$+ Options
$= Architecture
$# Dependencies' 8-char sha1 prefix
$$ $
Optionally you can provide a width, e.g. $20_ for a 20-wide name.
Like printf, you can provide '-' for left justification, e.g.
$-20_ for a left-justified name.
Anything else is copied verbatim into the output stream.
*Example:* ``$_$@$+`` translates to the name, version, and options
of the package, but no dependencies, arch, or compiler.
TODO: allow, e.g., $6# to customize short hash length
TODO: allow, e.g., $## for full hash.
"""
color = kwargs.get('color', False)
length = len(format_string)
out = StringIO()
escape = compiler = False
def write(s, c):
if color:
f = color_formats[c] + cescape(s) + '@.'
cwrite(f, stream=out, color=color)
else:
out.write(s)
iterator = enumerate(format_string)
for i, c in iterator:
if escape:
fmt = '%'
if c == '-':
fmt += c
i, c = next(iterator)
while c in '0123456789':
fmt += c
i, c = next(iterator)
fmt += 's'
if c == '_':
out.write(fmt % self.name)
elif c == '@':
if self.versions and self.versions != _any_version:
write(fmt % (c + str(self.versions)), c)
elif c == '%':
if self.compiler:
write(fmt % (c + str(self.compiler.name)), c)
compiler = True
elif c == '+':
if self.variants:
write(fmt % str(self.variants), c)
elif c == '=':
if self.architecture:
write(fmt % (c + str(self.architecture)), c)
elif c == '#':
if self.dependencies:
out.write(fmt % ('-' + self.dep_hash(8)))
elif c == '$':
if fmt != '':
raise ValueError("Can't use format width with $$.")
out.write('$')
escape = False
elif compiler:
if c == '@':
if self.compiler and self.compiler.versions:
write(c + str(self.compiler.versions), '%')
elif c == '$':
escape = True
else:
out.write(c)
compiler = False
elif c == '$':
escape = True
if i == length - 1:
raise ValueError("Error: unterminated $ in format: '%s'"
% format_string)
else:
out.write(c)
result = out.getvalue()
return result
def __str__(self):
by_name = lambda d: d.name
deps = self.preorder_traversal(key=by_name, root=False)
sorted_deps = sorted(deps, key=by_name)
dep_string = ''.join("^" + dep.format() for dep in sorted_deps)
return self.format() + dep_string
def tree(self, **kwargs):
"""Prints out this spec and its dependencies, tree-formatted
with indentation."""
color = kwargs.get('color', False)
depth = kwargs.get('depth', False)
showid = kwargs.get('ids', False)
cover = kwargs.get('cover', 'nodes')
indent = kwargs.get('indent', 0)
format = kwargs.get('format', '$_$@$%@$+$=')
out = ""
cur_id = 0
ids = {}
for d, node in self.preorder_traversal(cover=cover, depth=True):
out += " " * indent
if depth:
out += "%-4d" % d
if not id(node) in ids:
cur_id += 1
ids[id(node)] = cur_id
if showid:
out += "%-4d" % ids[id(node)]
out += (" " * d)
if d > 0:
out += "^"
out += node.format(format, color=color) + "\n"
return out
def __repr__(self):
return str(self)
#
# These are possible token types in the spec grammar.
#
DEP, AT, COLON, COMMA, ON, OFF, PCT, EQ, ID = range(9)
class SpecLexer(spack.parse.Lexer):
"""Parses tokens that make up spack specs."""
def __init__(self):
super(SpecLexer, self).__init__([
(r'\^', lambda scanner, val: self.token(DEP, val)),
(r'\@', lambda scanner, val: self.token(AT, val)),
(r'\:', lambda scanner, val: self.token(COLON, val)),
(r'\,', lambda scanner, val: self.token(COMMA, val)),
(r'\+', lambda scanner, val: self.token(ON, val)),
(r'\-', lambda scanner, val: self.token(OFF, val)),
(r'\~', lambda scanner, val: self.token(OFF, val)),
(r'\%', lambda scanner, val: self.token(PCT, val)),
(r'\=', lambda scanner, val: self.token(EQ, val)),
(r'\w[\w.-]*', lambda scanner, val: self.token(ID, val)),
(r'\s+', lambda scanner, val: None)])
class SpecParser(spack.parse.Parser):
def __init__(self):
super(SpecParser, self).__init__(SpecLexer())
def do_parse(self):
specs = []
try:
while self.next:
if self.accept(ID):
specs.append(self.spec())
elif self.accept(DEP):
if not specs:
self.last_token_error("Dependency has no package")
self.expect(ID)
specs[-1]._add_dependency(self.spec())
else:
self.unexpected_token()
except spack.parse.ParseError, e:
raise SpecParseError(e)
return specs
def parse_compiler(self, text):
self.setup(text)
return self.compiler()
def spec(self):
"""Parse a spec out of the input. If a spec is supplied, then initialize
and return it instead of creating a new one."""
self.check_identifier()
# This will init the spec without calling __init__.
spec = Spec.__new__(Spec)
spec.name = self.token.value
spec.versions = VersionList()
spec.variants = VariantMap()
spec.architecture = None
spec.compiler = None
spec.dependents = DependencyMap()
spec.dependencies = DependencyMap()
# record this so that we know whether version is
# unspecified or not.
added_version = False
while self.next:
if self.accept(AT):
vlist = self.version_list()
for version in vlist:
spec._add_version(version)
added_version = True
elif self.accept(ON):
spec._add_variant(self.variant(), True)
elif self.accept(OFF):
spec._add_variant(self.variant(), False)
elif self.accept(PCT):
spec._set_compiler(self.compiler())
elif self.accept(EQ):
spec._set_architecture(self.architecture())
else:
break
# If there was no version in the spec, consier it an open range
if not added_version:
spec.versions = VersionList(':')
return spec
def variant(self):
self.expect(ID)
self.check_identifier()
return self.token.value
def architecture(self):
self.expect(ID)
return self.token.value
def version(self):
start = None
end = None
if self.accept(ID):
start = self.token.value
if self.accept(COLON):
if self.accept(ID):
end = self.token.value
elif start:
# No colon, but there was a version.
return Version(start)
else:
# No colon and no id: invalid version.
self.next_token_error("Invalid version specifier")
if start: start = Version(start)
if end: end = Version(end)
return VersionRange(start, end)
def version_list(self):
vlist = []
vlist.append(self.version())
while self.accept(COMMA):
vlist.append(self.version())
return vlist
def compiler(self):
self.expect(ID)
self.check_identifier()
compiler = Compiler.__new__(Compiler)
compiler.name = self.token.value
compiler.versions = VersionList()
if self.accept(AT):
vlist = self.version_list()
for version in vlist:
compiler._add_version(version)
else:
compiler.versions = VersionList(':')
return compiler
def check_identifier(self):
"""The only identifiers that can contain '.' are versions, but version
ids are context-sensitive so we have to check on a case-by-case
basis. Call this if we detect a version id where it shouldn't be.
"""
if '.' in self.token.value:
self.last_token_error("Identifier cannot contain '.'")
def parse(string):
"""Returns a list of specs from an input string.
For creating one spec, see Spec() constructor.
"""
return SpecParser().parse(string)
def parse_anonymous_spec(spec_like, pkg_name):
"""Allow the user to omit the package name part of a spec if they
know what it has to be already.
e.g., provides('mpi@2', when='@1.9:') says that this package
provides MPI-3 when its version is higher than 1.9.
"""
if not isinstance(spec_like, (str, Spec)):
raise TypeError('spec must be Spec or spec string. Found %s'
% type(spec_like))
if isinstance(spec_like, str):
try:
anon_spec = Spec(spec_like)
except SpecParseError:
anon_spec = Spec(pkg_name + spec_like)
if anon_spec.name != pkg_name: raise ValueError(
"Invalid spec for package %s: %s" % (pkg_name, spec_like))
else:
anon_spec = spec_like.copy()
if anon_spec.name != pkg_name:
raise ValueError("Spec name '%s' must match package name '%s'"
% (anon_spec.name, pkg_name))
return anon_spec
class SpecError(spack.error.SpackError):
"""Superclass for all errors that occur while constructing specs."""
def __init__(self, message):
super(SpecError, self).__init__(message)
class SpecParseError(SpecError):
"""Wrapper for ParseError for when we're parsing specs."""
def __init__(self, parse_error):
super(SpecParseError, self).__init__(parse_error.message)
self.string = parse_error.string
self.pos = parse_error.pos
class DuplicateDependencyError(SpecError):
"""Raised when the same dependency occurs in a spec twice."""
def __init__(self, message):
super(DuplicateDependencyError, self).__init__(message)
class DuplicateVariantError(SpecError):
"""Raised when the same variant occurs in a spec twice."""
def __init__(self, message):
super(DuplicateVariantError, self).__init__(message)
class DuplicateCompilerError(SpecError):
"""Raised when the same compiler occurs in a spec twice."""
def __init__(self, message):
super(DuplicateCompilerError, self).__init__(message)
class UnsupportedCompilerError(SpecError):
"""Raised when the user asks for a compiler spack doesn't know about."""
def __init__(self, compiler_name):
super(UnsupportedCompilerError, self).__init__(
"The '%s' compiler is not yet supported." % compiler_name)
class DuplicateArchitectureError(SpecError):
"""Raised when the same architecture occurs in a spec twice."""
def __init__(self, message):
super(DuplicateArchitectureError, self).__init__(message)
class InconsistentSpecError(SpecError):
"""Raised when two nodes in the same spec DAG have inconsistent
constraints."""
def __init__(self, message):
super(InconsistentSpecError, self).__init__(message)
class InvalidDependencyException(SpecError):
"""Raised when a dependency in a spec is not actually a dependency
of the package."""
def __init__(self, message):
super(InvalidDependencyException, self).__init__(message)
class NoProviderError(SpecError):
"""Raised when there is no package that provides a particular
virtual dependency.
"""
def __init__(self, vpkg):
super(NoProviderError, self).__init__(
"No providers found for virtual package: '%s'" % vpkg)
self.vpkg = vpkg
class MultipleProviderError(SpecError):
"""Raised when there is no package that provides a particular
virtual dependency.
"""
def __init__(self, vpkg, providers):
"""Takes the name of the vpkg"""
super(MultipleProviderError, self).__init__(
"Multiple providers found for '%s': %s"
% (vpkg, [str(s) for s in providers]))
self.vpkg = vpkg
self.providers = providers
class UnsatisfiableSpecError(SpecError):
"""Raised when a spec conflicts with package constraints.
Provide the requirement that was violated when raising."""
def __init__(self, provided, required, constraint_type):
super(UnsatisfiableSpecError, self).__init__(
"%s does not satisfy %s" % (provided, required))
self.provided = provided
self.required = required
self.constraint_type = constraint_type
class UnsatisfiableSpecNameError(UnsatisfiableSpecError):
"""Raised when two specs aren't even for the same package."""
def __init__(self, provided, required):
super(UnsatisfiableVersionSpecError, self).__init__(
provided, required, "name")
class UnsatisfiableVersionSpecError(UnsatisfiableSpecError):
"""Raised when a spec version conflicts with package constraints."""
def __init__(self, provided, required):
super(UnsatisfiableVersionSpecError, self).__init__(
provided, required, "version")
class UnsatisfiableCompilerSpecError(UnsatisfiableSpecError):
"""Raised when a spec comiler conflicts with package constraints."""
def __init__(self, provided, required):
super(UnsatisfiableCompilerSpecError, self).__init__(
provided, required, "compiler")
class UnsatisfiableVariantSpecError(UnsatisfiableSpecError):
"""Raised when a spec variant conflicts with package constraints."""
def __init__(self, provided, required):
super(UnsatisfiableVariantSpecError, self).__init__(
provided, required, "variant")
class UnsatisfiableArchitectureSpecError(UnsatisfiableSpecError):
"""Raised when a spec architecture conflicts with package constraints."""
def __init__(self, provided, required):
super(UnsatisfiableArchitectureSpecError, self).__init__(
provided, required, "architecture")
class UnsatisfiableProviderSpecError(UnsatisfiableSpecError):
"""Raised when a provider is supplied but constraints don't match
a vpkg requirement"""
def __init__(self, provided, required):
super(UnsatisfiableProviderSpecError, self).__init__(
provided, required, "provider")
# TODO: get rid of this and be more specific about particular incompatible
# dep constraints
class UnsatisfiableDependencySpecError(UnsatisfiableSpecError):
"""Raised when some dependency of constrained specs are incompatible"""
def __init__(self, provided, required):
super(UnsatisfiableDependencySpecError, self).__init__(
provided, required, "dependency")
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