// Copyright 2012 The Kyua Authors.
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#include "model/metadata.hpp"
#include <memory>
#include "model/exceptions.hpp"
#include "model/types.hpp"
#include "utils/config/exceptions.hpp"
#include "utils/config/nodes.ipp"
#include "utils/config/tree.ipp"
#include "utils/datetime.hpp"
#include "utils/defs.hpp"
#include "utils/format/macros.hpp"
#include "utils/fs/exceptions.hpp"
#include "utils/fs/path.hpp"
#include "utils/noncopyable.hpp"
#include "utils/optional.ipp"
#include "utils/sanity.hpp"
#include "utils/text/exceptions.hpp"
#include "utils/text/operations.hpp"
#include "utils/units.hpp"
namespace config = utils::config;
namespace datetime = utils::datetime;
namespace fs = utils::fs;
namespace text = utils::text;
namespace units = utils::units;
using utils::optional;
namespace {
/// Global instance of defaults.
///
/// This exists so that the getters in metadata can return references instead
/// of object copies. Use get_defaults() to query.
static optional< config::tree > defaults;
/// A leaf node that holds a bytes quantity.
class bytes_node : public config::native_leaf_node< units::bytes > {
public:
/// Copies the node.
///
/// \return A dynamically-allocated node.
virtual base_node*
deep_copy(void) const
{
std::auto_ptr< bytes_node > new_node(new bytes_node());
new_node->_value = _value;
return new_node.release();
}
/// Pushes the node's value onto the Lua stack.
void
push_lua(lutok::state& /* state */) const
{
UNREACHABLE;
}
/// Sets the value of the node from an entry in the Lua stack.
void
set_lua(lutok::state& /* state */, const int /* index */)
{
UNREACHABLE;
}
};
/// A leaf node that holds a time delta.
class delta_node : public config::typed_leaf_node< datetime::delta > {
public:
/// Copies the node.
///
/// \return A dynamically-allocated node.
virtual base_node*
deep_copy(void) const
{
std::auto_ptr< delta_node > new_node(new delta_node());
new_node->_value = _value;
return new_node.release();
}
/// Sets the value of the node from a raw string representation.
///
/// \param raw_value The value to set the node to.
///
/// \throw value_error If the value is invalid.
void
set_string(const std::string& raw_value)
{
unsigned int seconds;
try {
seconds = text::to_type< unsigned int >(raw_value);
} catch (const text::error& e) {
throw config::value_error(F("Invalid time delta %s") % raw_value);
}
set(datetime::delta(seconds, 0));
}
/// Converts the contents of the node to a string.
///
/// \pre The node must have a value.
///
/// \return A string representation of the value held by the node.
std::string
to_string(void) const
{
return F("%s") % value().seconds;
}
/// Pushes the node's value onto the Lua stack.
void
push_lua(lutok::state& /* state */) const
{
UNREACHABLE;
}
/// Sets the value of the node from an entry in the Lua stack.
void
set_lua(lutok::state& /* state */, const int /* index */)
{
UNREACHABLE;
}
};
/// A leaf node that holds a "required user" property.
///
/// This node is just a string, but it provides validation of the only allowed
/// values.
class user_node : public config::string_node {
/// Copies the node.
///
/// \return A dynamically-allocated node.
virtual base_node*
deep_copy(void) const
{
std::auto_ptr< user_node > new_node(new user_node());
new_node->_value = _value;
return new_node.release();
}
/// Checks a given user textual representation for validity.
///
/// \param user The value to validate.
///
/// \throw config::value_error If the value is not valid.
void
validate(const value_type& user) const
{
if (!user.empty() && user != "root" && user != "unprivileged")
throw config::value_error("Invalid required user value");
}
};
/// A leaf node that holds a set of paths.
///
/// This node type is used to represent the value of the required files and
/// required programs, for example, and these do not allow relative paths. We
/// check this here.
class paths_set_node : public config::base_set_node< fs::path > {
/// Copies the node.
///
/// \return A dynamically-allocated node.
virtual base_node*
deep_copy(void) const
{
std::auto_ptr< paths_set_node > new_node(new paths_set_node());
new_node->_value = _value;
return new_node.release();
}
/// Converts a single path to the native type.
///
/// \param raw_value The value to parse.
///
/// \return The parsed value.
///
/// \throw config::value_error If the value is invalid.
fs::path
parse_one(const std::string& raw_value) const
{
try {
return fs::path(raw_value);
} catch (const fs::error& e) {
throw config::value_error(e.what());
}
}
/// Checks a collection of paths for validity.
///
/// \param paths The value to validate.
///
/// \throw config::value_error If the value is not valid.
void
validate(const value_type& paths) const
{
for (value_type::const_iterator iter = paths.begin();
iter != paths.end(); ++iter) {
const fs::path& path = *iter;
if (!path.is_absolute() && path.ncomponents() > 1)
throw config::value_error(F("Relative path '%s' not allowed") %
*iter);
}
}
};
/// Initializes a tree to hold test case requirements.
///
/// \param [in,out] tree The tree to initialize.
static void
init_tree(config::tree& tree)
{
tree.define< config::strings_set_node >("allowed_architectures");
tree.define< config::strings_set_node >("allowed_platforms");
tree.define_dynamic("custom");
tree.define< config::string_node >("description");
tree.define< config::bool_node >("has_cleanup");
tree.define< config::bool_node >("is_exclusive");
tree.define< config::strings_set_node >("required_configs");
tree.define< bytes_node >("required_disk_space");
tree.define< paths_set_node >("required_files");
tree.define< bytes_node >("required_memory");
tree.define< paths_set_node >("required_programs");
tree.define< user_node >("required_user");
tree.define< delta_node >("timeout");
}
/// Sets default values on a tree object.
///
/// \param [in,out] tree The tree to configure.
static void
set_defaults(config::tree& tree)
{
tree.set< config::strings_set_node >("allowed_architectures",
model::strings_set());
tree.set< config::strings_set_node >("allowed_platforms",
model::strings_set());
tree.set< config::string_node >("description", "");
tree.set< config::bool_node >("has_cleanup", false);
tree.set< config::bool_node >("is_exclusive", false);
tree.set< config::strings_set_node >("required_configs",
model::strings_set());
tree.set< bytes_node >("required_disk_space", units::bytes(0));
tree.set< paths_set_node >("required_files", model::paths_set());
tree.set< bytes_node >("required_memory", units::bytes(0));
tree.set< paths_set_node >("required_programs", model::paths_set());
tree.set< user_node >("required_user", "");
// TODO(jmmv): We shouldn't be setting a default timeout like this. See
// Issue 5 for details.
tree.set< delta_node >("timeout", datetime::delta(300, 0));
}
/// Queries the global defaults tree object with lazy initialization.
///
/// \return A metadata tree. This object is statically allocated so it is
/// acceptable to obtain references to it and its members.
const config::tree&
get_defaults(void)
{
if (!defaults) {
config::tree props;
init_tree(props);
set_defaults(props);
defaults = props;
}
return defaults.get();
}
/// Looks up a value in a tree with error rewriting.
///
/// \tparam NodeType The type of the node.
/// \param tree The tree in which to insert the value.
/// \param key The key to set.
///
/// \return A read-write reference to the value in the node.
///
/// \throw model::error If the key is not known or if the value is not valid.
template< class NodeType >
typename NodeType::value_type&
lookup_rw(config::tree& tree, const std::string& key)
{
try {
return tree.lookup_rw< NodeType >(key);
} catch (const config::unknown_key_error& e) {
throw model::error(F("Unknown metadata property %s") % key);
} catch (const config::value_error& e) {
throw model::error(F("Invalid value for metadata property %s: %s") %
key % e.what());
}
}
/// Sets a value in a tree with error rewriting.
///
/// \tparam NodeType The type of the node.
/// \param tree The tree in which to insert the value.
/// \param key The key to set.
/// \param value The value to set the node to.
///
/// \throw model::error If the key is not known or if the value is not valid.
template< class NodeType >
void
set(config::tree& tree, const std::string& key,
const typename NodeType::value_type& value)
{
try {
tree.set< NodeType >(key, value);
} catch (const config::unknown_key_error& e) {
throw model::error(F("Unknown metadata property %s") % key);
} catch (const config::value_error& e) {
throw model::error(F("Invalid value for metadata property %s: %s") %
key % e.what());
}
}
} // anonymous namespace
/// Internal implementation of the metadata class.
struct model::metadata::impl : utils::noncopyable {
/// Metadata properties.
config::tree props;
/// Constructor.
///
/// \param props_ Metadata properties of the test.
impl(const utils::config::tree& props_) :
props(props_)
{
}
/// Equality comparator.
///
/// \param other The other object to compare this one to.
///
/// \return True if this object and other are equal; false otherwise.
bool
operator==(const impl& other) const
{
return (get_defaults().combine(props) ==
get_defaults().combine(other.props));
}
};
/// Constructor.
///
/// \param props Metadata properties of the test.
model::metadata::metadata(const utils::config::tree& props) :
_pimpl(new impl(props))
{
}
/// Destructor.
model::metadata::~metadata(void)
{
}
/// Applies a set of overrides to this metadata object.
///
/// \param overrides The overrides to apply. Any values explicitly set in this
/// other object will override any possible values set in this object.
///
/// \return A new metadata object with the combination.
model::metadata
model::metadata::apply_overrides(const metadata& overrides) const
{
return metadata(_pimpl->props.combine(overrides._pimpl->props));
}
/// Returns the architectures allowed by the test.
///
/// \return Set of architectures, or empty if this does not apply.
const model::strings_set&
model::metadata::allowed_architectures(void) const
{
if (_pimpl->props.is_set("allowed_architectures")) {
return _pimpl->props.lookup< config::strings_set_node >(
"allowed_architectures");
} else {
return get_defaults().lookup< config::strings_set_node >(
"allowed_architectures");
}
}
/// Returns the platforms allowed by the test.
///
/// \return Set of platforms, or empty if this does not apply.
const model::strings_set&
model::metadata::allowed_platforms(void) const
{
if (_pimpl->props.is_set("allowed_platforms")) {
return _pimpl->props.lookup< config::strings_set_node >(
"allowed_platforms");
} else {
return get_defaults().lookup< config::strings_set_node >(
"allowed_platforms");
}
}
/// Returns all the user-defined metadata properties.
///
/// \return A key/value map of properties.
model::properties_map
model::metadata::custom(void) const
{
return _pimpl->props.all_properties("custom", true);
}
/// Returns the description of the test.
///
/// \return Textual description; may be empty.
const std::string&
model::metadata::description(void) const
{
if (_pimpl->props.is_set("description")) {
return _pimpl->props.lookup< config::string_node >("description");
} else {
return get_defaults().lookup< config::string_node >("description");
}
}
/// Returns whether the test has a cleanup part or not.
///
/// \return True if there is a cleanup part; false otherwise.
bool
model::metadata::has_cleanup(void) const
{
if (_pimpl->props.is_set("has_cleanup")) {
return _pimpl->props.lookup< config::bool_node >("has_cleanup");
} else {
return get_defaults().lookup< config::bool_node >("has_cleanup");
}
}
/// Returns whether the test is exclusive or not.
///
/// \return True if the test has to be run on its own, not concurrently with any
/// other tests; false otherwise.
bool
model::metadata::is_exclusive(void) const
{
if (_pimpl->props.is_set("is_exclusive")) {
return _pimpl->props.lookup< config::bool_node >("is_exclusive");
} else {
return get_defaults().lookup< config::bool_node >("is_exclusive");
}
}
/// Returns the list of configuration variables needed by the test.
///
/// \return Set of configuration variables.
const model::strings_set&
model::metadata::required_configs(void) const
{
if (_pimpl->props.is_set("required_configs")) {
return _pimpl->props.lookup< config::strings_set_node >(
"required_configs");
} else {
return get_defaults().lookup< config::strings_set_node >(
"required_configs");
}
}
/// Returns the amount of free disk space required by the test.
///
/// \return Number of bytes, or 0 if this does not apply.
const units::bytes&
model::metadata::required_disk_space(void) const
{
if (_pimpl->props.is_set("required_disk_space")) {
return _pimpl->props.lookup< bytes_node >("required_disk_space");
} else {
return get_defaults().lookup< bytes_node >("required_disk_space");
}
}
/// Returns the list of files needed by the test.
///
/// \return Set of paths.
const model::paths_set&
model::metadata::required_files(void) const
{
if (_pimpl->props.is_set("required_files")) {
return _pimpl->props.lookup< paths_set_node >("required_files");
} else {
return get_defaults().lookup< paths_set_node >("required_files");
}
}
/// Returns the amount of memory required by the test.
///
/// \return Number of bytes, or 0 if this does not apply.
const units::bytes&
model::metadata::required_memory(void) const
{
if (_pimpl->props.is_set("required_memory")) {
return _pimpl->props.lookup< bytes_node >("required_memory");
} else {
return get_defaults().lookup< bytes_node >("required_memory");
}
}
/// Returns the list of programs needed by the test.
///
/// \return Set of paths.
const model::paths_set&
model::metadata::required_programs(void) const
{
if (_pimpl->props.is_set("required_programs")) {
return _pimpl->props.lookup< paths_set_node >("required_programs");
} else {
return get_defaults().lookup< paths_set_node >("required_programs");
}
}
/// Returns the user required by the test.
///
/// \return One of unprivileged, root or empty.
const std::string&
model::metadata::required_user(void) const
{
if (_pimpl->props.is_set("required_user")) {
return _pimpl->props.lookup< user_node >("required_user");
} else {
return get_defaults().lookup< user_node >("required_user");
}
}
/// Returns the timeout of the test.
///
/// \return A time delta; should be compared to default_timeout to see if it has
/// been overriden.
const datetime::delta&
model::metadata::timeout(void) const
{
if (_pimpl->props.is_set("timeout")) {
return _pimpl->props.lookup< delta_node >("timeout");
} else {
return get_defaults().lookup< delta_node >("timeout");
}
}
/// Externalizes the metadata to a set of key/value textual pairs.
///
/// \return A key/value representation of the metadata.
model::properties_map
model::metadata::to_properties(void) const
{
const config::tree fully_specified = get_defaults().combine(_pimpl->props);
return fully_specified.all_properties();
}
/// Equality comparator.
///
/// \param other The other object to compare this one to.
///
/// \return True if this object and other are equal; false otherwise.
bool
model::metadata::operator==(const metadata& other) const
{
return _pimpl == other._pimpl || *_pimpl == *other._pimpl;
}
/// Inequality comparator.
///
/// \param other The other object to compare this one to.
///
/// \return True if this object and other are different; false otherwise.
bool
model::metadata::operator!=(const metadata& other) const
{
return !(*this == other);
}
/// Injects the object into a stream.
///
/// \param output The stream into which to inject the object.
/// \param object The object to format.
///
/// \return The output stream.
std::ostream&
model::operator<<(std::ostream& output, const metadata& object)
{
output << "metadata{";
bool first = true;
const model::properties_map props = object.to_properties();
for (model::properties_map::const_iterator iter = props.begin();
iter != props.end(); ++iter) {
if (!first)
output << ", ";
output << F("%s=%s") % (*iter).first %
text::quote((*iter).second, '\'');
first = false;
}
output << "}";
return output;
}
/// Internal implementation of the metadata_builder class.
struct model::metadata_builder::impl : utils::noncopyable {
/// Collection of requirements.
config::tree props;
/// Whether we have created a metadata object or not.
bool built;
/// Constructor.
impl(void) :
built(false)
{
init_tree(props);
}
/// Constructor.
///
/// \param base The base model to construct a copy from.
impl(const model::metadata& base) :
props(base._pimpl->props.deep_copy()),
built(false)
{
}
};
/// Constructor.
model::metadata_builder::metadata_builder(void) :
_pimpl(new impl())
{
}
/// Constructor.
model::metadata_builder::metadata_builder(const model::metadata& base) :
_pimpl(new impl(base))
{
}
/// Destructor.
model::metadata_builder::~metadata_builder(void)
{
}
/// Accumulates an additional allowed architecture.
///
/// \param arch The architecture.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::add_allowed_architecture(const std::string& arch)
{
if (!_pimpl->props.is_set("allowed_architectures")) {
_pimpl->props.set< config::strings_set_node >(
"allowed_architectures",
get_defaults().lookup< config::strings_set_node >(
"allowed_architectures"));
}
lookup_rw< config::strings_set_node >(
_pimpl->props, "allowed_architectures").insert(arch);
return *this;
}
/// Accumulates an additional allowed platform.
///
/// \param platform The platform.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::add_allowed_platform(const std::string& platform)
{
if (!_pimpl->props.is_set("allowed_platforms")) {
_pimpl->props.set< config::strings_set_node >(
"allowed_platforms",
get_defaults().lookup< config::strings_set_node >(
"allowed_platforms"));
}
lookup_rw< config::strings_set_node >(
_pimpl->props, "allowed_platforms").insert(platform);
return *this;
}
/// Accumulates a single user-defined property.
///
/// \param key Name of the property to define.
/// \param value Value of the property.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::add_custom(const std::string& key,
const std::string& value)
{
_pimpl->props.set_string(F("custom.%s") % key, value);
return *this;
}
/// Accumulates an additional required configuration variable.
///
/// \param var The name of the configuration variable.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::add_required_config(const std::string& var)
{
if (!_pimpl->props.is_set("required_configs")) {
_pimpl->props.set< config::strings_set_node >(
"required_configs",
get_defaults().lookup< config::strings_set_node >(
"required_configs"));
}
lookup_rw< config::strings_set_node >(
_pimpl->props, "required_configs").insert(var);
return *this;
}
/// Accumulates an additional required file.
///
/// \param path The path to the file.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::add_required_file(const fs::path& path)
{
if (!_pimpl->props.is_set("required_files")) {
_pimpl->props.set< paths_set_node >(
"required_files",
get_defaults().lookup< paths_set_node >("required_files"));
}
lookup_rw< paths_set_node >(_pimpl->props, "required_files").insert(path);
return *this;
}
/// Accumulates an additional required program.
///
/// \param path The path to the program.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::add_required_program(const fs::path& path)
{
if (!_pimpl->props.is_set("required_programs")) {
_pimpl->props.set< paths_set_node >(
"required_programs",
get_defaults().lookup< paths_set_node >("required_programs"));
}
lookup_rw< paths_set_node >(_pimpl->props,
"required_programs").insert(path);
return *this;
}
/// Sets the architectures allowed by the test.
///
/// \param as Set of architectures.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_allowed_architectures(
const model::strings_set& as)
{
set< config::strings_set_node >(_pimpl->props, "allowed_architectures", as);
return *this;
}
/// Sets the platforms allowed by the test.
///
/// \return ps Set of platforms.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_allowed_platforms(const model::strings_set& ps)
{
set< config::strings_set_node >(_pimpl->props, "allowed_platforms", ps);
return *this;
}
/// Sets the user-defined properties.
///
/// \param props The custom properties to set.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_custom(const model::properties_map& props)
{
for (model::properties_map::const_iterator iter = props.begin();
iter != props.end(); ++iter)
_pimpl->props.set_string(F("custom.%s") % (*iter).first,
(*iter).second);
return *this;
}
/// Sets the description of the test.
///
/// \param description Textual description of the test.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_description(const std::string& description)
{
set< config::string_node >(_pimpl->props, "description", description);
return *this;
}
/// Sets whether the test has a cleanup part or not.
///
/// \param cleanup True if the test has a cleanup part; false otherwise.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_has_cleanup(const bool cleanup)
{
set< config::bool_node >(_pimpl->props, "has_cleanup", cleanup);
return *this;
}
/// Sets whether the test is exclusive or not.
///
/// \param exclusive True if the test is exclusive; false otherwise.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_is_exclusive(const bool exclusive)
{
set< config::bool_node >(_pimpl->props, "is_exclusive", exclusive);
return *this;
}
/// Sets the list of configuration variables needed by the test.
///
/// \param vars Set of configuration variables.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_required_configs(const model::strings_set& vars)
{
set< config::strings_set_node >(_pimpl->props, "required_configs", vars);
return *this;
}
/// Sets the amount of free disk space required by the test.
///
/// \param bytes Number of bytes.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_required_disk_space(const units::bytes& bytes)
{
set< bytes_node >(_pimpl->props, "required_disk_space", bytes);
return *this;
}
/// Sets the list of files needed by the test.
///
/// \param files Set of paths.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_required_files(const model::paths_set& files)
{
set< paths_set_node >(_pimpl->props, "required_files", files);
return *this;
}
/// Sets the amount of memory required by the test.
///
/// \param bytes Number of bytes.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_required_memory(const units::bytes& bytes)
{
set< bytes_node >(_pimpl->props, "required_memory", bytes);
return *this;
}
/// Sets the list of programs needed by the test.
///
/// \param progs Set of paths.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_required_programs(const model::paths_set& progs)
{
set< paths_set_node >(_pimpl->props, "required_programs", progs);
return *this;
}
/// Sets the user required by the test.
///
/// \param user One of unprivileged, root or empty.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_required_user(const std::string& user)
{
set< user_node >(_pimpl->props, "required_user", user);
return *this;
}
/// Sets a metadata property by name from its textual representation.
///
/// \param key The property to set.
/// \param value The value to set the property to.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid or the key does not exist.
model::metadata_builder&
model::metadata_builder::set_string(const std::string& key,
const std::string& value)
{
try {
_pimpl->props.set_string(key, value);
} catch (const config::unknown_key_error& e) {
throw model::format_error(F("Unknown metadata property %s") % key);
} catch (const config::value_error& e) {
throw model::format_error(
F("Invalid value for metadata property %s: %s") % key % e.what());
}
return *this;
}
/// Sets the timeout of the test.
///
/// \param timeout The timeout to set.
///
/// \return A reference to this builder.
///
/// \throw model::error If the value is invalid.
model::metadata_builder&
model::metadata_builder::set_timeout(const datetime::delta& timeout)
{
set< delta_node >(_pimpl->props, "timeout", timeout);
return *this;
}
/// Creates a new metadata object.
///
/// \pre This has not yet been called. We only support calling this function
/// once due to the way the internal tree works: we pass around references, not
/// deep copies, so if we allowed a second build, we'd encourage reusing the
/// same builder to construct different metadata objects, and this could have
/// unintended consequences.
///
/// \return The constructed metadata object.
model::metadata
model::metadata_builder::build(void) const
{
PRE(!_pimpl->built);
_pimpl->built = true;
return metadata(_pimpl->props);
}