Ejemplo n.º 1
0
    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        # Super class gets projections from the kwargs
        # YAML specific to get projections from YAML file
        projections_path = os.path.join(self._root, _projections_path)
        if not self.projections:
            if os.path.exists(projections_path):
                # Read projections file from view
                with open(projections_path, 'r') as f:
                    projections_data = s_yaml.load(f)
                    spack.config.validate(projections_data,
                                          spack.schema.projections.schema)
                    self.projections = projections_data['projections']
            else:
                # Write projections file to new view
                # Not strictly necessary as the empty file is the empty
                # projection but it makes sense for consistency
                mkdirp(os.path.dirname(projections_path))
                with open(projections_path, 'w') as f:
                    f.write(s_yaml.dump({'projections': self.projections}))
        elif not os.path.exists(projections_path):
            # Write projections file to new view
            mkdirp(os.path.dirname(projections_path))
            with open(projections_path, 'w') as f:
                f.write(s_yaml.dump({'projections': self.projections}))
        else:
            msg = 'View at %s has projections file' % self._root
            msg += ' and was passed projections manually.'
            raise ConflictingProjectionsError(msg)

        self.extensions_layout = YamlViewExtensionsLayout(self, layout)

        self._croot = colorize_root(self._root) + " "
Ejemplo n.º 2
0
def activate(parser, args):

    # Somehow activation is sensible to quoting on the command line
    # The code below is a quick fix to parse the spec as if it was unquoted,
    # and work around a subtle bug. The bug itself is still to be found
    pieces = []
    for x in args.spec:
        pieces.extend(x.split())
    args.spec = pieces

    specs = spack.cmd.parse_specs(args.spec)
    if len(specs) != 1:
        tty.die("activate requires one spec.  %d given." % len(specs))

    spec = spack.cmd.disambiguate_spec(specs[0])
    if not spec.package.is_extension:
        tty.die("%s is not an extension." % spec.name)

    layout = spack.store.extensions
    if args.view is not None:
        layout = YamlViewExtensionsLayout(args.view, spack.store.layout)

    if spec.package.is_activated(extensions_layout=layout):
        tty.msg("Package %s is already activated." % specs[0].short_spec)
        return

    spec.package.do_activate(extensions_layout=layout,
                             with_dependencies=not args.force)
Ejemplo n.º 3
0
def deactivate(parser, args):
    specs = spack.cmd.parse_specs(args.spec)
    if len(specs) != 1:
        tty.die("deactivate requires one spec.  %d given." % len(specs))

    spec = spack.cmd.disambiguate_spec(specs[0])
    pkg = spec.package

    layout = spack.store.extensions
    if args.view is not None:
        layout = YamlViewExtensionsLayout(args.view, spack.store.layout)

    if args.all:
        if pkg.extendable:
            tty.msg("Deactivating all extensions of %s" % pkg.spec.short_spec)
            ext_pkgs = spack.store.db.activated_extensions_for(
                spec, extensions_layout=layout)

            for ext_pkg in ext_pkgs:
                ext_pkg.spec.normalize()
                if ext_pkg.is_activated():
                    ext_pkg.do_deactivate(force=True, extensions_layout=layout)

        elif pkg.is_extension:
            if not args.force and \
               not spec.package.is_activated(extensions_layout=layout):
                tty.die("%s is not activated." % pkg.spec.short_spec)

            tty.msg("Deactivating %s and all dependencies." %
                    pkg.spec.short_spec)

            topo_order = topological_sort(spec)
            index = spec.index()

            for name in topo_order:
                espec = index[name]
                epkg = espec.package
                if epkg.extends(pkg.extendee_spec):
                    if epkg.is_activated(extensions_layout=layout) or \
                       args.force:

                        epkg.do_deactivate(force=args.force,
                                           extensions_layout=layout)

        else:
            tty.die("spack deactivate --all requires an extendable package "
                    "or an extension.")

    else:
        if not pkg.is_extension:
            tty.die("spack deactivate requires an extension.",
                    "Did you mean 'spack deactivate --all'?")

        if not args.force and \
           not spec.package.is_activated(extensions_layout=layout):
            tty.die("Package %s is not activated." % specs[0].short_spec)

        spec.package.do_deactivate(force=args.force, extensions_layout=layout)
Ejemplo n.º 4
0
    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        # Super class gets projections from the kwargs
        # YAML specific to get projections from YAML file
        self.projections_path = os.path.join(self._root, _projections_path)
        if not self.projections:
            # Read projections file from view
            self.projections = self.read_projections()
        elif not os.path.exists(self.projections_path):
            # Write projections file to new view
            self.write_projections()
        else:
            # Ensure projections are the same from each source
            # Read projections file from view
            if self.projections != self.read_projections():
                msg = 'View at %s has projections file' % self._root
                msg += ' which does not match projections passed manually.'
                raise ConflictingProjectionsError(msg)

        self.extensions_layout = YamlViewExtensionsLayout(self, layout)

        self._croot = colorize_root(self._root) + " "
Ejemplo n.º 5
0
def activate(parser, args):
    specs = spack.cmd.parse_specs(args.spec)
    if len(specs) != 1:
        tty.die("activate requires one spec.  %d given." % len(specs))

    spec = spack.cmd.disambiguate_spec(specs[0])
    if not spec.package.is_extension:
        tty.die("%s is not an extension." % spec.name)

    layout = spack.store.extensions
    if args.view is not None:
        layout = YamlViewExtensionsLayout(args.view, spack.store.layout)

    if spec.package.is_activated(extensions_layout=layout):
        tty.die("Package %s is already activated." % specs[0].short_spec)

    spec.package.do_activate(extensions_layout=layout)
Ejemplo n.º 6
0
class YamlFilesystemView(FilesystemView):
    """
        Filesystem view to work with a yaml based directory layout.
    """
    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        # Super class gets projections from the kwargs
        # YAML specific to get projections from YAML file
        self.projections_path = os.path.join(self._root, _projections_path)
        if not self.projections:
            # Read projections file from view
            self.projections = self.read_projections()
        elif not os.path.exists(self.projections_path):
            # Write projections file to new view
            self.write_projections()
        else:
            # Ensure projections are the same from each source
            # Read projections file from view
            if self.projections != self.read_projections():
                msg = 'View at %s has projections file' % self._root
                msg += ' which does not match projections passed manually.'
                raise ConflictingProjectionsError(msg)

        self.extensions_layout = YamlViewExtensionsLayout(self, layout)

        self._croot = colorize_root(self._root) + " "

    def write_projections(self):
        if self.projections:
            mkdirp(os.path.dirname(self.projections_path))
            with open(self.projections_path, 'w') as f:
                f.write(s_yaml.dump_config({'projections': self.projections}))

    def read_projections(self):
        if os.path.exists(self.projections_path):
            with open(self.projections_path, 'r') as f:
                projections_data = s_yaml.load(f)
                spack.config.validate(projections_data,
                                      spack.schema.projections.schema)
                return projections_data['projections']
        else:
            return {}

    def add_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        specs = set(specs)

        if kwargs.get("with_dependencies", True):
            specs.update(get_dependencies(specs))

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        conflicts = self.get_conflicts(*specs)

        if conflicts:
            for s, v in conflicts:
                self.print_conflict(v, s)
            return

        extensions = set(filter(lambda s: s.package.is_extension, specs))
        standalones = specs - extensions

        set(map(self._check_no_ext_conflicts, extensions))
        # fail on first error, otherwise link extensions as well
        if all(map(self.add_standalone, standalones)):
            all(map(self.add_extension, extensions))

    def add_extension(self, spec):
        if not spec.package.is_extension:
            tty.error(self._croot +
                      'Package %s is not an extension.' % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot +
                     'Skipping external package: %s' % colorize_spec(spec))
            return True

        if not spec.package.is_activated(self):
            spec.package.do_activate(self,
                                     verbose=self.verbose,
                                     with_dependencies=False)

        # make sure the meta folder is linked as well (this is not done by the
        # extension-activation mechnism)
        if not self.check_added(spec):
            self.link_meta_folder(spec)

        return True

    def add_standalone(self, spec):
        if spec.package.is_extension:
            tty.error(self._croot + 'Package %s is an extension.' % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot +
                     'Skipping external package: %s' % colorize_spec(spec))
            return True

        if self.check_added(spec):
            tty.warn(self._croot + 'Skipping already linked package: %s' %
                     colorize_spec(spec))
            return True

        if spec.package.extendable:
            # Check for globally activated extensions in the extendee that
            # we're looking at.
            activated = [
                p.spec for p in spack.store.db.activated_extensions_for(spec)
            ]
            if activated:
                tty.error("Globally activated extensions cannot be used in "
                          "conjunction with filesystem views. "
                          "Please deactivate the following specs: ")
                spack.cmd.display_specs(activated,
                                        flags=True,
                                        variants=True,
                                        long=False)
                return False

        self.merge(spec)

        self.link_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Linked package: %s' % colorize_spec(spec))
        return True

    def merge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(self.layout.hidden_file_regexes, ignore)

        # check for dir conflicts
        conflicts = tree.find_dir_conflicts(view_dst, ignore_file)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        if not self.ignore_conflicts:
            conflicts.extend(pkg.view_file_conflicts(self, merge_map))

        if conflicts:
            raise MergeConflictError(conflicts[0])

        # merge directories with the tree
        tree.merge_directories(view_dst, ignore_file)

        pkg.add_files_to_view(self, merge_map)

    def unmerge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(self.layout.hidden_file_regexes, ignore)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        pkg.remove_files_from_view(self, merge_map)

        # now unmerge the directory tree
        tree.unmerge_directories(view_dst, ignore_file)

    def remove_files(self, files):
        def needs_file(spec, file):
            # convert the file we want to remove to a source in this spec
            projection = self.get_projection_for_spec(spec)
            relative_path = os.path.relpath(file, projection)
            test_path = os.path.join(spec.prefix, relative_path)

            # check if this spec owns a file of that name (through the
            # manifest in the metadata dir, which we have in the view).
            manifest_file = os.path.join(self.get_path_meta_folder(spec),
                                         spack.store.layout.manifest_file_name)
            try:
                with open(manifest_file, 'r') as f:
                    manifest = s_json.load(f)
            except (OSError, IOError):
                # if we can't load it, assume it doesn't know about the file.
                manifest = {}
            return test_path in manifest

        specs = self.get_all_specs()

        for file in files:
            if not os.path.lexists(file):
                tty.warn("Tried to remove %s which does not exist" % file)
                continue

            # remove if file is not owned by any other package in the view
            # This will only be false if two packages are merged into a prefix
            # and have a conflicting file

            # check all specs for whether they own the file. That include the spec
            # we are currently removing, as we remove files before unlinking the
            # metadata directory.
            if len([s for s in specs if needs_file(s, file)]) <= 1:
                tty.debug("Removing file " + file)
                os.remove(file)

    def check_added(self, spec):
        assert spec.concrete
        return spec == self.get_spec(spec)

    def remove_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        with_dependents = kwargs.get("with_dependents", True)
        with_dependencies = kwargs.get("with_dependencies", False)

        # caller can pass this in, as get_all_specs() is expensive
        all_specs = kwargs.get("all_specs", None) or set(self.get_all_specs())

        specs = set(specs)

        if with_dependencies:
            specs = get_dependencies(specs)

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        to_deactivate = specs
        to_keep = all_specs - to_deactivate

        dependents = find_dependents(to_keep, to_deactivate)

        if with_dependents:
            # remove all packages depending on the ones to remove
            if len(dependents) > 0:
                tty.warn(self._croot +
                         "The following dependents will be removed: %s" %
                         ", ".join((s.name for s in dependents)))
                to_deactivate.update(dependents)
        elif len(dependents) > 0:
            tty.warn(self._croot +
                     "The following packages will be unusable: %s" %
                     ", ".join((s.name for s in dependents)))

        # Determine the order that packages should be removed from the view;
        # dependents come before their dependencies.
        to_deactivate_sorted = list()
        depmap = dict()
        for spec in to_deactivate:
            depmap[spec] = set(d for d in spec.traverse(root=False)
                               if d in to_deactivate)

        while depmap:
            for spec in [s for s, d in depmap.items() if not d]:
                to_deactivate_sorted.append(spec)
                for s in depmap.keys():
                    depmap[s].discard(spec)
                depmap.pop(spec)
        to_deactivate_sorted.reverse()

        # Ensure that the sorted list contains all the packages
        assert set(to_deactivate_sorted) == to_deactivate

        # Remove the packages from the view
        for spec in to_deactivate_sorted:
            if spec.package.is_extension:
                self.remove_extension(spec, with_dependents=with_dependents)
            else:
                self.remove_standalone(spec)

        self._purge_empty_directories()

    def remove_extension(self, spec, with_dependents=True):
        """
            Remove (unlink) an extension from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        if spec.package.is_activated(self):
            spec.package.do_deactivate(self,
                                       verbose=self.verbose,
                                       remove_dependents=with_dependents)
        self.unlink_meta_folder(spec)

    def remove_standalone(self, spec):
        """
            Remove (unlink) a standalone package from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        self.unmerge(spec)
        self.unlink_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Removed package: %s' % colorize_spec(spec))

    def get_projection_for_spec(self, spec):
        """
           Return the projection for a spec in this view.

           Relies on the ordering of projections to avoid ambiguity.
        """
        spec = spack.spec.Spec(spec)
        # Extensions are placed by their extendee, not by their own spec
        locator_spec = spec
        if spec.package.extendee_spec:
            locator_spec = spec.package.extendee_spec

        proj = spack.projections.get_projection(self.projections, locator_spec)
        if proj:
            return os.path.join(self._root, locator_spec.format(proj))
        return self._root

    def get_all_specs(self):
        md_dirs = []
        for root, dirs, files in os.walk(self._root):
            if spack.store.layout.metadata_dir in dirs:
                md_dirs.append(
                    os.path.join(root, spack.store.layout.metadata_dir))

        specs = []
        for md_dir in md_dirs:
            if os.path.exists(md_dir):
                for name_dir in os.listdir(md_dir):
                    filename = os.path.join(md_dir, name_dir,
                                            spack.store.layout.spec_file_name)
                    spec = get_spec_from_file(filename)
                    if spec:
                        specs.append(spec)
        return specs

    def get_conflicts(self, *specs):
        """
            Return list of tuples (<spec>, <spec in view>) where the spec
            active in the view differs from the one to be activated.
        """
        in_view = map(self.get_spec, specs)
        return [(s, v) for s, v in zip(specs, in_view)
                if v is not None and s != v]

    def get_path_meta_folder(self, spec):
        "Get path to meta folder for either spec or spec name."
        return os.path.join(self.get_projection_for_spec(spec),
                            spack.store.layout.metadata_dir,
                            getattr(spec, "name", spec))

    def get_spec(self, spec):
        dotspack = self.get_path_meta_folder(spec)
        filename = os.path.join(dotspack, spack.store.layout.spec_file_name)

        return get_spec_from_file(filename)

    def link_meta_folder(self, spec):
        src = spack.store.layout.metadata_path(spec)
        tgt = self.get_path_meta_folder(spec)

        tree = LinkTree(src)
        # there should be no conflicts when linking the meta folder
        tree.merge(tgt, link=self.link)

    def print_conflict(self, spec_active, spec_specified, level="error"):
        "Singular print function for spec conflicts."
        cprint = getattr(tty, level)
        color = sys.stdout.isatty()
        linked = tty.color.colorize("   (@gLinked@.)", color=color)
        specified = tty.color.colorize("(@rSpecified@.)", color=color)
        cprint(self._croot + "Package conflict detected:\n"
               "%s %s\n" % (linked, colorize_spec(spec_active)) + "%s %s" %
               (specified, colorize_spec(spec_specified)))

    def print_status(self, *specs, **kwargs):
        if kwargs.get("with_dependencies", False):
            specs = set(get_dependencies(specs))

        specs = sorted(specs, key=lambda s: s.name)
        in_view = list(map(self.get_spec, specs))

        for s, v in zip(specs, in_view):
            if not v:
                tty.error(self._croot + 'Package not linked: %s' % s.name)
            elif s != v:
                self.print_conflict(v, s, level="warn")

        in_view = list(filter(None, in_view))

        if len(specs) > 0:
            tty.msg("Packages linked in %s:" % self._croot[:-1])

            # Make a dict with specs keyed by architecture and compiler.
            index = index_by(specs, ('architecture', 'compiler'))

            # Traverse the index and print out each package
            for i, (architecture, compiler) in enumerate(sorted(index)):
                if i > 0:
                    print()

                header = "%s{%s} / %s{%s}" % (
                    spack.spec.architecture_color, architecture,
                    spack.spec.compiler_color, compiler)
                tty.hline(colorize(header), char='-')

                specs = index[(architecture, compiler)]
                specs.sort()

                format_string = '{name}{@version}'
                format_string += '{%compiler}{compiler_flags}{variants}'
                abbreviated = [s.cformat(format_string) for s in specs]

                # Print one spec per line along with prefix path
                width = max(len(s) for s in abbreviated)
                width += 2
                format = "    %%-%ds%%s" % width

                for abbrv, s in zip(abbreviated, specs):
                    prefix = ''
                    if self.verbose:
                        prefix = colorize('@K{%s}' % s.dag_hash(7))
                    print(prefix + (format %
                                    (abbrv, self.get_projection_for_spec(s))))
        else:
            tty.warn(self._croot + "No packages found.")

    def _purge_empty_directories(self):
        remove_empty_directories(self._root)

    def _purge_broken_links(self):
        remove_dead_links(self._root)

    def clean(self):
        self._purge_broken_links()
        self._purge_empty_directories()

    def unlink_meta_folder(self, spec):
        path = self.get_path_meta_folder(spec)
        assert os.path.exists(path)
        shutil.rmtree(path)

    def _check_no_ext_conflicts(self, spec):
        """
            Check that there is no extension conflict for specs.
        """
        extendee = spec.package.extendee_spec
        try:
            self.extensions_layout.check_extension_conflict(extendee, spec)
        except ExtensionAlreadyInstalledError:
            # we print the warning here because later on the order in which
            # packages get activated is not clear (set-sorting)
            tty.warn(self._croot +
                     'Skipping already activated package: %s' % spec.name)
Ejemplo n.º 7
0
    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        self.extensions_layout = YamlViewExtensionsLayout(root, layout)

        self._croot = colorize_root(self.root) + " "
Ejemplo n.º 8
0
class YamlFilesystemView(FilesystemView):
    """
        Filesystem view to work with a yaml based directory layout.
    """

    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        self.extensions_layout = YamlViewExtensionsLayout(root, layout)

        self._croot = colorize_root(self.root) + " "

    def add_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        specs = set(specs)

        if kwargs.get("with_dependencies", True):
            specs.update(get_dependencies(specs))

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        conflicts = self.get_conflicts(*specs)

        if conflicts:
            for s, v in conflicts:
                self.print_conflict(v, s)
            return

        extensions = set(filter(lambda s: s.package.is_extension, specs))
        standalones = specs - extensions

        set(map(self._check_no_ext_conflicts, extensions))
        # fail on first error, otherwise link extensions as well
        if all(map(self.add_standalone, standalones)):
            all(map(self.add_extension, extensions))

    def add_extension(self, spec):
        if not spec.package.is_extension:
            tty.error(self._croot + 'Package %s is not an extension.'
                      % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot + 'Skipping external package: %s'
                     % colorize_spec(spec))
            return True

        if not spec.package.is_activated(self):
            spec.package.do_activate(
                self, verbose=self.verbose, with_dependencies=False)

        # make sure the meta folder is linked as well (this is not done by the
        # extension-activation mechnism)
        if not self.check_added(spec):
            self.link_meta_folder(spec)

        return True

    def add_standalone(self, spec):
        if spec.package.is_extension:
            tty.error(self._croot + 'Package %s is an extension.'
                      % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot + 'Skipping external package: %s'
                     % colorize_spec(spec))
            return True

        if self.check_added(spec):
            tty.warn(self._croot + 'Skipping already linked package: %s'
                     % colorize_spec(spec))
            return True

        if spec.package.extendable:
            # Check for globally activated extensions in the extendee that
            # we're looking at.
            activated = [p.spec for p in
                         spack.store.db.activated_extensions_for(spec)]
            if activated:
                tty.error("Globally activated extensions cannot be used in "
                          "conjunction with filesystem views. "
                          "Please deactivate the following specs: ")
                spack.cmd.display_specs(activated, flags=True, variants=True,
                                        long=False)
                return False

        self.merge(spec)

        self.link_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Linked package: %s' % colorize_spec(spec))
        return True

    def merge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(
            self.layout.hidden_file_paths, ignore)

        # check for dir conflicts
        conflicts = tree.find_dir_conflicts(view_dst, ignore_file)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        if not self.ignore_conflicts:
            conflicts.extend(pkg.view_file_conflicts(self, merge_map))

        if conflicts:
            raise MergeConflictError(conflicts[0])

        # merge directories with the tree
        tree.merge_directories(view_dst, ignore_file)

        pkg.add_files_to_view(self, merge_map)

    def unmerge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(
            self.layout.hidden_file_paths, ignore)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        pkg.remove_files_from_view(self, merge_map)

        # now unmerge the directory tree
        tree.unmerge_directories(view_dst, ignore_file)

    def remove_file(self, src, dest):
        if not os.path.islink(dest):
            raise ValueError("%s is not a link tree!" % dest)
        # remove if dest is a hardlink/symlink to src; this will only
        # be false if two packages are merged into a prefix and have a
        # conflicting file
        if filecmp.cmp(src, dest, shallow=True):
            os.remove(dest)

    def check_added(self, spec):
        assert spec.concrete
        return spec == self.get_spec(spec)

    def remove_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        with_dependents = kwargs.get("with_dependents", True)
        with_dependencies = kwargs.get("with_dependencies", False)

        specs = set(specs)

        if with_dependencies:
            specs = get_dependencies(specs)

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        all_specs = set(self.get_all_specs())

        to_deactivate = specs
        to_keep = all_specs - to_deactivate

        dependents = find_dependents(to_keep, to_deactivate)

        if with_dependents:
            # remove all packages depending on the ones to remove
            if len(dependents) > 0:
                tty.warn(self._croot +
                         "The following dependents will be removed: %s"
                         % ", ".join((s.name for s in dependents)))
                to_deactivate.update(dependents)
        elif len(dependents) > 0:
            tty.warn(self._croot +
                     "The following packages will be unusable: %s"
                     % ", ".join((s.name for s in dependents)))

        extensions = set(filter(lambda s: s.package.is_extension,
                         to_deactivate))
        standalones = to_deactivate - extensions

        # Please note that a traversal of the DAG in post-order and then
        # forcibly removing each package should remove the need to specify
        # with_dependents for deactivating extensions/allow removal without
        # additional checks (force=True). If removal performance becomes
        # unbearable for whatever reason, this should be the first point of
        # attack.
        #
        # see: https://github.com/spack/spack/pull/3227#discussion_r117147475
        remove_extension = ft.partial(self.remove_extension,
                                      with_dependents=with_dependents)

        set(map(remove_extension, extensions))
        set(map(self.remove_standalone, standalones))

        self.purge_empty_directories()

    def remove_extension(self, spec, with_dependents=True):
        """
            Remove (unlink) an extension from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        # The spec might have been deactivated as depdency of another package
        # already
        if spec.package.is_activated(self):
            spec.package.do_deactivate(
                self,
                verbose=self.verbose,
                remove_dependents=with_dependents)
        self.unlink_meta_folder(spec)

    def remove_standalone(self, spec):
        """
            Remove (unlink) a standalone package from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        self.unmerge(spec)
        self.unlink_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Removed package: %s' % colorize_spec(spec))

    def get_all_specs(self):
        dotspack = os.path.join(self.root,
                                spack.store.layout.metadata_dir)
        if os.path.exists(dotspack):
            return list(filter(None, map(self.get_spec, os.listdir(dotspack))))
        else:
            return []

    def get_conflicts(self, *specs):
        """
            Return list of tuples (<spec>, <spec in view>) where the spec
            active in the view differs from the one to be activated.
        """
        in_view = map(self.get_spec, specs)
        return [(s, v) for s, v in zip(specs, in_view)
                if v is not None and s != v]

    def get_path_meta_folder(self, spec):
        "Get path to meta folder for either spec or spec name."
        return os.path.join(self.root,
                            spack.store.layout.metadata_dir,
                            getattr(spec, "name", spec))

    def get_spec(self, spec):
        dotspack = self.get_path_meta_folder(spec)
        filename = os.path.join(dotspack,
                                spack.store.layout.spec_file_name)

        try:
            with open(filename, "r") as f:
                return spack.spec.Spec.from_yaml(f)
        except IOError:
            return None

    def link_meta_folder(self, spec):
        src = spack.store.layout.metadata_path(spec)
        tgt = self.get_path_meta_folder(spec)

        tree = LinkTree(src)
        # there should be no conflicts when linking the meta folder
        tree.merge(tgt, link=self.link)

    def print_conflict(self, spec_active, spec_specified, level="error"):
        "Singular print function for spec conflicts."
        cprint = getattr(tty, level)
        color = sys.stdout.isatty()
        linked    = tty.color.colorize("   (@gLinked@.)", color=color)
        specified = tty.color.colorize("(@rSpecified@.)", color=color)
        cprint(self._croot + "Package conflict detected:\n"
               "%s %s\n" % (linked, colorize_spec(spec_active)) +
               "%s %s" % (specified, colorize_spec(spec_specified)))

    def print_status(self, *specs, **kwargs):
        if kwargs.get("with_dependencies", False):
            specs = set(get_dependencies(specs))

        specs = sorted(specs, key=lambda s: s.name)
        in_view = list(map(self.get_spec, specs))

        for s, v in zip(specs, in_view):
            if not v:
                tty.error(self._croot +
                          'Package not linked: %s' % s.name)
            elif s != v:
                self.print_conflict(v, s, level="warn")

        in_view = list(filter(None, in_view))

        if len(specs) > 0:
            tty.msg("Packages linked in %s:" % self._croot[:-1])

            # avoid circular dependency
            import spack.cmd
            spack.cmd.display_specs(in_view, flags=True, variants=True,
                                    long=self.verbose)
        else:
            tty.warn(self._croot + "No packages found.")

    def purge_empty_directories(self):
        """
            Ascend up from the leaves accessible from `path`
            and remove empty directories.
        """
        for dirpath, subdirs, files in os.walk(self.root, topdown=False):
            for sd in subdirs:
                sdp = os.path.join(dirpath, sd)
                try:
                    os.rmdir(sdp)
                except OSError:
                    pass

    def unlink_meta_folder(self, spec):
        path = self.get_path_meta_folder(spec)
        assert os.path.exists(path)
        shutil.rmtree(path)

    def _check_no_ext_conflicts(self, spec):
        """
            Check that there is no extension conflict for specs.
        """
        extendee = spec.package.extendee_spec
        try:
            self.extensions_layout.check_extension_conflict(extendee, spec)
        except ExtensionAlreadyInstalledError:
            # we print the warning here because later on the order in which
            # packages get activated is not clear (set-sorting)
            tty.warn(self._croot +
                     'Skipping already activated package: %s' % spec.name)
Ejemplo n.º 9
0
def extensions(parser, args):
    if not args.spec:
        tty.die("extensions requires a package spec.")

    show_packages = False
    show_installed = False
    show_activated = False
    show_all = False
    if args.show == 'packages':
        show_packages = True
    elif args.show == 'installed':
        show_installed = True
    elif args.show == 'activated':
        show_activated = True
    elif args.show == 'all':
        show_packages = True
        show_installed = True
        show_activated = True
        show_all = True
    else:
        tty.die('unrecognized show type: %s' % args.show)

    #
    # Checks
    #
    spec = spack.cmd.parse_specs(args.spec)
    if len(spec) > 1:
        tty.die("Can only list extensions for one package.")

    if not spec[0].package.extendable:
        tty.die("%s is not an extendable package." % spec[0].name)

    spec = spack.cmd.disambiguate_spec(spec[0])

    if not spec.package.extendable:
        tty.die("%s does not have extensions." % spec.short_spec)

    if not args.mode:
        args.mode = 'short'

    if show_packages:
        #
        # List package names of extensions
        extensions = spack.repo.extensions_for(spec)
        if not extensions:
            tty.msg("%s has no extensions." % spec.cshort_spec)
        else:
            tty.msg(spec.cshort_spec)
            tty.msg("%d extensions:" % len(extensions))
            colify(ext.name for ext in extensions)

    layout = spack.store.extensions
    if args.view is not None:
        layout = YamlViewExtensionsLayout(args.view, spack.store.layout)

    if show_installed:
        #
        # List specs of installed extensions.
        #
        installed = [
            s.spec for s in spack.store.db.installed_extensions_for(spec)
        ]

        if show_all:
            print
        if not installed:
            tty.msg("None installed.")
        else:
            tty.msg("%d installed:" % len(installed))
            spack.cmd.find.display_specs(installed, mode=args.mode)

    if show_activated:
        #
        # List specs of activated extensions.
        #
        activated = layout.extension_map(spec)
        if show_all:
            print
        if not activated:
            tty.msg("None activated.")
        else:
            tty.msg("%d currently activated:" % len(activated))
            spack.cmd.find.display_specs(activated.values(),
                                         mode=args.mode,
                                         long=args.long)
Ejemplo n.º 10
0
    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        self.extensions_layout = YamlViewExtensionsLayout(root, layout)

        self._croot = colorize_root(self.root) + " "
Ejemplo n.º 11
0
class YamlFilesystemView(FilesystemView):
    """
        Filesystem view to work with a yaml based directory layout.
    """

    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        self.extensions_layout = YamlViewExtensionsLayout(root, layout)

        self._croot = colorize_root(self.root) + " "

    def add_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        specs = set(specs)

        if kwargs.get("with_dependencies", True):
            specs.update(get_dependencies(specs))

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        conflicts = self.get_conflicts(*specs)

        if conflicts:
            for s, v in conflicts:
                self.print_conflict(v, s)
            return

        extensions = set(filter(lambda s: s.package.is_extension, specs))
        standalones = specs - extensions

        set(map(self._check_no_ext_conflicts, extensions))
        # fail on first error, otherwise link extensions as well
        if all(map(self.add_standalone, standalones)):
            all(map(self.add_extension, extensions))

    def add_extension(self, spec):
        if not spec.package.is_extension:
            tty.error(self._croot + 'Package %s is not an extension.'
                      % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot + 'Skipping external package: %s'
                     % colorize_spec(spec))
            return True

        if not spec.package.is_activated(self):
            spec.package.do_activate(
                self, verbose=self.verbose, with_dependencies=False)

        # make sure the meta folder is linked as well (this is not done by the
        # extension-activation mechnism)
        if not self.check_added(spec):
            self.link_meta_folder(spec)

        return True

    def add_standalone(self, spec):
        if spec.package.is_extension:
            tty.error(self._croot + 'Package %s is an extension.'
                      % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot + 'Skipping external package: %s'
                     % colorize_spec(spec))
            return True

        if self.check_added(spec):
            tty.warn(self._croot + 'Skipping already linked package: %s'
                     % colorize_spec(spec))
            return True

        if spec.package.extendable:
            # Check for globally activated extensions in the extendee that
            # we're looking at.
            activated = [p.spec for p in
                         spack.store.db.activated_extensions_for(spec)]
            if activated:
                tty.error("Globally activated extensions cannot be used in "
                          "conjunction with filesystem views. "
                          "Please deactivate the following specs: ")
                spack.cmd.display_specs(activated, flags=True, variants=True,
                                        long=False)
                return False

        self.merge(spec)

        self.link_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Linked package: %s' % colorize_spec(spec))
        return True

    def merge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(
            self.layout.hidden_file_paths, ignore)

        # check for dir conflicts
        conflicts = tree.find_dir_conflicts(view_dst, ignore_file)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        if not self.ignore_conflicts:
            conflicts.extend(pkg.view_file_conflicts(self, merge_map))

        if conflicts:
            raise MergeConflictError(conflicts[0])

        # merge directories with the tree
        tree.merge_directories(view_dst, ignore_file)

        pkg.add_files_to_view(self, merge_map)

    def unmerge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(
            self.layout.hidden_file_paths, ignore)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        pkg.remove_files_from_view(self, merge_map)

        # now unmerge the directory tree
        tree.unmerge_directories(view_dst, ignore_file)

    def remove_file(self, src, dest):
        if not os.path.islink(dest):
            raise ValueError("%s is not a link tree!" % dest)
        # remove if dest is a hardlink/symlink to src; this will only
        # be false if two packages are merged into a prefix and have a
        # conflicting file
        if filecmp.cmp(src, dest, shallow=True):
            os.remove(dest)

    def check_added(self, spec):
        assert spec.concrete
        return spec == self.get_spec(spec)

    def remove_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        with_dependents = kwargs.get("with_dependents", True)
        with_dependencies = kwargs.get("with_dependencies", False)

        specs = set(specs)

        if with_dependencies:
            specs = get_dependencies(specs)

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        all_specs = set(self.get_all_specs())

        to_deactivate = specs
        to_keep = all_specs - to_deactivate

        dependents = find_dependents(to_keep, to_deactivate)

        if with_dependents:
            # remove all packages depending on the ones to remove
            if len(dependents) > 0:
                tty.warn(self._croot +
                         "The following dependents will be removed: %s"
                         % ", ".join((s.name for s in dependents)))
                to_deactivate.update(dependents)
        elif len(dependents) > 0:
            tty.warn(self._croot +
                     "The following packages will be unusable: %s"
                     % ", ".join((s.name for s in dependents)))

        extensions = set(filter(lambda s: s.package.is_extension,
                         to_deactivate))
        standalones = to_deactivate - extensions

        # Please note that a traversal of the DAG in post-order and then
        # forcibly removing each package should remove the need to specify
        # with_dependents for deactivating extensions/allow removal without
        # additional checks (force=True). If removal performance becomes
        # unbearable for whatever reason, this should be the first point of
        # attack.
        #
        # see: https://github.com/spack/spack/pull/3227#discussion_r117147475
        remove_extension = ft.partial(self.remove_extension,
                                      with_dependents=with_dependents)

        set(map(remove_extension, extensions))
        set(map(self.remove_standalone, standalones))

        self.purge_empty_directories()

    def remove_extension(self, spec, with_dependents=True):
        """
            Remove (unlink) an extension from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        # The spec might have been deactivated as depdency of another package
        # already
        if spec.package.is_activated(self):
            spec.package.do_deactivate(
                self,
                verbose=self.verbose,
                remove_dependents=with_dependents)
        self.unlink_meta_folder(spec)

    def remove_standalone(self, spec):
        """
            Remove (unlink) a standalone package from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        self.unmerge(spec)
        self.unlink_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Removed package: %s' % colorize_spec(spec))

    def get_all_specs(self):
        dotspack = os.path.join(self.root,
                                spack.store.layout.metadata_dir)
        if os.path.exists(dotspack):
            return list(filter(None, map(self.get_spec, os.listdir(dotspack))))
        else:
            return []

    def get_conflicts(self, *specs):
        """
            Return list of tuples (<spec>, <spec in view>) where the spec
            active in the view differs from the one to be activated.
        """
        in_view = map(self.get_spec, specs)
        return [(s, v) for s, v in zip(specs, in_view)
                if v is not None and s != v]

    def get_path_meta_folder(self, spec):
        "Get path to meta folder for either spec or spec name."
        return os.path.join(self.root,
                            spack.store.layout.metadata_dir,
                            getattr(spec, "name", spec))

    def get_spec(self, spec):
        dotspack = self.get_path_meta_folder(spec)
        filename = os.path.join(dotspack,
                                spack.store.layout.spec_file_name)

        try:
            with open(filename, "r") as f:
                return spack.spec.Spec.from_yaml(f)
        except IOError:
            return None

    def link_meta_folder(self, spec):
        src = spack.store.layout.metadata_path(spec)
        tgt = self.get_path_meta_folder(spec)

        tree = LinkTree(src)
        # there should be no conflicts when linking the meta folder
        tree.merge(tgt, link=self.link)

    def print_conflict(self, spec_active, spec_specified, level="error"):
        "Singular print function for spec conflicts."
        cprint = getattr(tty, level)
        color = sys.stdout.isatty()
        linked    = tty.color.colorize("   (@gLinked@.)", color=color)
        specified = tty.color.colorize("(@rSpecified@.)", color=color)
        cprint(self._croot + "Package conflict detected:\n"
               "%s %s\n" % (linked, colorize_spec(spec_active)) +
               "%s %s" % (specified, colorize_spec(spec_specified)))

    def print_status(self, *specs, **kwargs):
        if kwargs.get("with_dependencies", False):
            specs = set(get_dependencies(specs))

        specs = sorted(specs, key=lambda s: s.name)
        in_view = list(map(self.get_spec, specs))

        for s, v in zip(specs, in_view):
            if not v:
                tty.error(self._croot +
                          'Package not linked: %s' % s.name)
            elif s != v:
                self.print_conflict(v, s, level="warn")

        in_view = list(filter(None, in_view))

        if len(specs) > 0:
            tty.msg("Packages linked in %s:" % self._croot[:-1])

            # avoid circular dependency
            import spack.cmd
            spack.cmd.display_specs(in_view, flags=True, variants=True,
                                    long=self.verbose)
        else:
            tty.warn(self._croot + "No packages found.")

    def purge_empty_directories(self):
        """
            Ascend up from the leaves accessible from `path`
            and remove empty directories.
        """
        for dirpath, subdirs, files in os.walk(self.root, topdown=False):
            for sd in subdirs:
                sdp = os.path.join(dirpath, sd)
                try:
                    os.rmdir(sdp)
                except OSError:
                    pass

    def unlink_meta_folder(self, spec):
        path = self.get_path_meta_folder(spec)
        assert os.path.exists(path)
        shutil.rmtree(path)

    def _check_no_ext_conflicts(self, spec):
        """
            Check that there is no extension conflict for specs.
        """
        extendee = spec.package.extendee_spec
        try:
            self.extensions_layout.check_extension_conflict(extendee, spec)
        except ExtensionAlreadyInstalledError:
            # we print the warning here because later on the order in which
            # packages get activated is not clear (set-sorting)
            tty.warn(self._croot +
                     'Skipping already activated package: %s' % spec.name)
Ejemplo n.º 12
0
class YamlFilesystemView(FilesystemView):
    """
        Filesystem view to work with a yaml based directory layout.
    """
    def __init__(self, root, layout, **kwargs):
        super(YamlFilesystemView, self).__init__(root, layout, **kwargs)

        # Super class gets projections from the kwargs
        # YAML specific to get projections from YAML file
        projections_path = os.path.join(self._root, _projections_path)
        if not self.projections:
            if os.path.exists(projections_path):
                # Read projections file from view
                with open(projections_path, 'r') as f:
                    projections_data = s_yaml.load(f)
                    spack.config.validate(projections_data,
                                          spack.schema.projections.schema)
                    self.projections = projections_data['projections']
            else:
                # Write projections file to new view
                # Not strictly necessary as the empty file is the empty
                # projection but it makes sense for consistency
                mkdirp(os.path.dirname(projections_path))
                with open(projections_path, 'w') as f:
                    f.write(s_yaml.dump({'projections': self.projections}))
        elif not os.path.exists(projections_path):
            # Write projections file to new view
            mkdirp(os.path.dirname(projections_path))
            with open(projections_path, 'w') as f:
                f.write(s_yaml.dump({'projections': self.projections}))
        else:
            msg = 'View at %s has projections file' % self._root
            msg += ' and was passed projections manually.'
            raise ConflictingProjectionsError(msg)

        self.extensions_layout = YamlViewExtensionsLayout(self, layout)

        self._croot = colorize_root(self._root) + " "

    def add_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        specs = set(specs)

        if kwargs.get("with_dependencies", True):
            specs.update(get_dependencies(specs))

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        conflicts = self.get_conflicts(*specs)

        if conflicts:
            for s, v in conflicts:
                self.print_conflict(v, s)
            return

        extensions = set(filter(lambda s: s.package.is_extension, specs))
        standalones = specs - extensions

        set(map(self._check_no_ext_conflicts, extensions))
        # fail on first error, otherwise link extensions as well
        if all(map(self.add_standalone, standalones)):
            all(map(self.add_extension, extensions))

    def add_extension(self, spec):
        if not spec.package.is_extension:
            tty.error(self._croot +
                      'Package %s is not an extension.' % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot +
                     'Skipping external package: %s' % colorize_spec(spec))
            return True

        if not spec.package.is_activated(self):
            spec.package.do_activate(self,
                                     verbose=self.verbose,
                                     with_dependencies=False)

        # make sure the meta folder is linked as well (this is not done by the
        # extension-activation mechnism)
        if not self.check_added(spec):
            self.link_meta_folder(spec)

        return True

    def add_standalone(self, spec):
        if spec.package.is_extension:
            tty.error(self._croot + 'Package %s is an extension.' % spec.name)
            return False

        if spec.external:
            tty.warn(self._croot +
                     'Skipping external package: %s' % colorize_spec(spec))
            return True

        if self.check_added(spec):
            tty.warn(self._croot + 'Skipping already linked package: %s' %
                     colorize_spec(spec))
            return True

        if spec.package.extendable:
            # Check for globally activated extensions in the extendee that
            # we're looking at.
            activated = [
                p.spec for p in spack.store.db.activated_extensions_for(spec)
            ]
            if activated:
                tty.error("Globally activated extensions cannot be used in "
                          "conjunction with filesystem views. "
                          "Please deactivate the following specs: ")
                spack.cmd.display_specs(activated,
                                        flags=True,
                                        variants=True,
                                        long=False)
                return False

        self.merge(spec)

        self.link_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Linked package: %s' % colorize_spec(spec))
        return True

    def merge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(self.layout.hidden_file_paths, ignore)

        # check for dir conflicts
        conflicts = tree.find_dir_conflicts(view_dst, ignore_file)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        if not self.ignore_conflicts:
            conflicts.extend(pkg.view_file_conflicts(self, merge_map))

        if conflicts:
            raise MergeConflictError(conflicts[0])

        # merge directories with the tree
        tree.merge_directories(view_dst, ignore_file)

        pkg.add_files_to_view(self, merge_map)

    def unmerge(self, spec, ignore=None):
        pkg = spec.package
        view_source = pkg.view_source()
        view_dst = pkg.view_destination(self)

        tree = LinkTree(view_source)

        ignore = ignore or (lambda f: False)
        ignore_file = match_predicate(self.layout.hidden_file_paths, ignore)

        merge_map = tree.get_file_map(view_dst, ignore_file)
        pkg.remove_files_from_view(self, merge_map)

        # now unmerge the directory tree
        tree.unmerge_directories(view_dst, ignore_file)

    def remove_file(self, src, dest):
        if not os.path.islink(dest):
            raise ValueError("%s is not a link tree!" % dest)
        # remove if dest is a hardlink/symlink to src; this will only
        # be false if two packages are merged into a prefix and have a
        # conflicting file
        if filecmp.cmp(src, dest, shallow=True):
            os.remove(dest)

    def check_added(self, spec):
        assert spec.concrete
        return spec == self.get_spec(spec)

    def remove_specs(self, *specs, **kwargs):
        assert all((s.concrete for s in specs))
        with_dependents = kwargs.get("with_dependents", True)
        with_dependencies = kwargs.get("with_dependencies", False)

        specs = set(specs)

        if with_dependencies:
            specs = get_dependencies(specs)

        if kwargs.get("exclude", None):
            specs = set(filter_exclude(specs, kwargs["exclude"]))

        all_specs = set(self.get_all_specs())

        to_deactivate = specs
        to_keep = all_specs - to_deactivate

        dependents = find_dependents(to_keep, to_deactivate)

        if with_dependents:
            # remove all packages depending on the ones to remove
            if len(dependents) > 0:
                tty.warn(self._croot +
                         "The following dependents will be removed: %s" %
                         ", ".join((s.name for s in dependents)))
                to_deactivate.update(dependents)
        elif len(dependents) > 0:
            tty.warn(self._croot +
                     "The following packages will be unusable: %s" %
                     ", ".join((s.name for s in dependents)))

        extensions = set(
            filter(lambda s: s.package.is_extension, to_deactivate))
        standalones = to_deactivate - extensions

        # Please note that a traversal of the DAG in post-order and then
        # forcibly removing each package should remove the need to specify
        # with_dependents for deactivating extensions/allow removal without
        # additional checks (force=True). If removal performance becomes
        # unbearable for whatever reason, this should be the first point of
        # attack.
        #
        # see: https://github.com/spack/spack/pull/3227#discussion_r117147475
        remove_extension = ft.partial(self.remove_extension,
                                      with_dependents=with_dependents)

        set(map(remove_extension, extensions))
        set(map(self.remove_standalone, standalones))

        self.purge_empty_directories()

    def remove_extension(self, spec, with_dependents=True):
        """
            Remove (unlink) an extension from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        if spec.package.is_activated(self):
            spec.package.do_deactivate(self,
                                       verbose=self.verbose,
                                       remove_dependents=with_dependents)
        self.unlink_meta_folder(spec)

    def remove_standalone(self, spec):
        """
            Remove (unlink) a standalone package from this view.
        """
        if not self.check_added(spec):
            tty.warn(self._croot +
                     'Skipping package not linked in view: %s' % spec.name)
            return

        self.unmerge(spec)
        self.unlink_meta_folder(spec)

        if self.verbose:
            tty.info(self._croot + 'Removed package: %s' % colorize_spec(spec))

    def get_projection_for_spec(self, spec):
        """
           Return the projection for a spec in this view.

           Relies on the ordering of projections to avoid ambiguity.
        """
        spec = spack.spec.Spec(spec)
        # Extensions are placed by their extendee, not by their own spec
        locator_spec = spec
        if spec.package.extendee_spec:
            locator_spec = spec.package.extendee_spec

        all_fmt_str = None
        for spec_like, fmt_str in self.projections.items():
            if locator_spec.satisfies(spec_like, strict=True):
                return os.path.join(self._root, locator_spec.format(fmt_str))
            elif spec_like == 'all':
                all_fmt_str = fmt_str
        if all_fmt_str:
            return os.path.join(self._root, locator_spec.format(all_fmt_str))
        return self._root

    def get_all_specs(self):
        md_dirs = []
        for root, dirs, files in os.walk(self._root):
            if spack.store.layout.metadata_dir in dirs:
                md_dirs.append(
                    os.path.join(root, spack.store.layout.metadata_dir))

        specs = []
        for md_dir in md_dirs:
            if os.path.exists(md_dir):
                for name_dir in os.listdir(md_dir):
                    filename = os.path.join(md_dir, name_dir,
                                            spack.store.layout.spec_file_name)
                    spec = get_spec_from_file(filename)
                    if spec:
                        specs.append(spec)
        return specs

    def get_conflicts(self, *specs):
        """
            Return list of tuples (<spec>, <spec in view>) where the spec
            active in the view differs from the one to be activated.
        """
        in_view = map(self.get_spec, specs)
        return [(s, v) for s, v in zip(specs, in_view)
                if v is not None and s != v]

    def get_path_meta_folder(self, spec):
        "Get path to meta folder for either spec or spec name."
        return os.path.join(self.get_projection_for_spec(spec),
                            spack.store.layout.metadata_dir,
                            getattr(spec, "name", spec))

    def get_spec(self, spec):
        dotspack = self.get_path_meta_folder(spec)
        filename = os.path.join(dotspack, spack.store.layout.spec_file_name)

        return get_spec_from_file(filename)

    def link_meta_folder(self, spec):
        src = spack.store.layout.metadata_path(spec)
        tgt = self.get_path_meta_folder(spec)

        tree = LinkTree(src)
        # there should be no conflicts when linking the meta folder
        tree.merge(tgt, link=self.link)

    def print_conflict(self, spec_active, spec_specified, level="error"):
        "Singular print function for spec conflicts."
        cprint = getattr(tty, level)
        color = sys.stdout.isatty()
        linked = tty.color.colorize("   (@gLinked@.)", color=color)
        specified = tty.color.colorize("(@rSpecified@.)", color=color)
        cprint(self._croot + "Package conflict detected:\n"
               "%s %s\n" % (linked, colorize_spec(spec_active)) + "%s %s" %
               (specified, colorize_spec(spec_specified)))

    def print_status(self, *specs, **kwargs):
        if kwargs.get("with_dependencies", False):
            specs = set(get_dependencies(specs))

        specs = sorted(specs, key=lambda s: s.name)
        in_view = list(map(self.get_spec, specs))

        for s, v in zip(specs, in_view):
            if not v:
                tty.error(self._croot + 'Package not linked: %s' % s.name)
            elif s != v:
                self.print_conflict(v, s, level="warn")

        in_view = list(filter(None, in_view))

        if len(specs) > 0:
            tty.msg("Packages linked in %s:" % self._croot[:-1])

            # Make a dict with specs keyed by architecture and compiler.
            index = index_by(specs, ('architecture', 'compiler'))

            # Traverse the index and print out each package
            for i, (architecture, compiler) in enumerate(sorted(index)):
                if i > 0:
                    print()

                header = "%s{%s} / %s{%s}" % (
                    spack.spec.architecture_color, architecture,
                    spack.spec.compiler_color, compiler)
                tty.hline(colorize(header), char='-')

                specs = index[(architecture, compiler)]
                specs.sort()

                format_string = '$_$@$%@+$+'
                abbreviated = [s.cformat(format_string) for s in specs]

                # Print one spec per line along with prefix path
                width = max(len(s) for s in abbreviated)
                width += 2
                format = "    %%-%ds%%s" % width

                for abbrv, s in zip(abbreviated, specs):
                    prefix = ''
                    if self.verbose:
                        prefix = colorize('@K{%s}' % s.dag_hash(7))
                    print(prefix + (format %
                                    (abbrv, self.get_projection_for_spec(s))))
        else:
            tty.warn(self._croot + "No packages found.")

    def purge_empty_directories(self):
        """
            Ascend up from the leaves accessible from `path`
            and remove empty directories.
        """
        for dirpath, subdirs, files in os.walk(self._root, topdown=False):
            for sd in subdirs:
                sdp = os.path.join(dirpath, sd)
                try:
                    os.rmdir(sdp)
                except OSError:
                    pass

    def unlink_meta_folder(self, spec):
        path = self.get_path_meta_folder(spec)
        assert os.path.exists(path)
        shutil.rmtree(path)

    def _check_no_ext_conflicts(self, spec):
        """
            Check that there is no extension conflict for specs.
        """
        extendee = spec.package.extendee_spec
        try:
            self.extensions_layout.check_extension_conflict(extendee, spec)
        except ExtensionAlreadyInstalledError:
            # we print the warning here because later on the order in which
            # packages get activated is not clear (set-sorting)
            tty.warn(self._croot +
                     'Skipping already activated package: %s' % spec.name)