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// file : bpkg/package-configuration.hxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef BPKG_PACKAGE_CONFIGURATION_HXX
#define BPKG_PACKAGE_CONFIGURATION_HXX
#include <libbuild2/types.hxx> // build2::names
#include <libbuild2/config/types.hxx> // build2::config::variable_origin
#include <bpkg/types.hxx>
#include <bpkg/utility.hxx>
#include <bpkg/package.hxx>
using namespace std;
namespace bpkg
{
class package_skeleton;
// Serialize the variable value as a command line override.
//
string
serialize_cmdline (const string& name, const optional<build2::names>& value);
struct config_variable_value
{
string name;
// The variable_origin values have the following meaning:
//
// default -- default value from the config directive
// buildfile -- dependent configuration (config_source::dependent)
// override -- user configuration (config_source::user)
// undefined -- none of the above
//
build2::config::variable_origin origin;
// Variable type name with absent signifying untyped.
//
optional<string> type;
// If origin is not undefined, then this is the reversed variable value
// with absent signifying NULL.
//
optional<build2::names> value;
// If origin is buildfile, then this is the "originating dependent" which
// first set this variable to this value.
//
optional<package_key> dependent;
// If origin is buildfile, then this flag indicates whether the
// originating dependent has been encountered during the negotiation
// retry.
//
bool confirmed;
// If origin is buildfile and the originating dependent has been
// encountered during the negotiation, then this flag indicates whether
// this dependent has another dependency alternative.
//
// @@ Strictly speaking this is a property of the dependent and
// duplicating it here for each variable is quite dirty (and requires
// us to drag this through skeleton calls). Doing this properly,
// however, will likely require another map with the dependent as a
// key. Maybe one day.
//
bool has_alternative;
public:
void
undefine ()
{
origin = build2::config::variable_origin::undefined;
value = nullopt;
dependent = nullopt;
confirmed = false;
has_alternative = false;
}
string
serialize_cmdline () const
{
return bpkg::serialize_cmdline (name, value);
}
};
void
to_checksum (sha256&, const config_variable_value&);
// A subset of config_variable_value for variable values set by the
// dependents (origin is buildfile). Used to track change history.
//
struct dependent_config_variable_value
{
string name;
optional<build2::names> value;
package_key dependent;
bool has_alternative;
public:
string
serialize_cmdline () const
{
return bpkg::serialize_cmdline (name, value);
}
};
inline bool
operator== (const dependent_config_variable_value& x,
const dependent_config_variable_value& y)
{
return x.name == y.name && x.value == y.value && x.dependent == y.dependent;
}
class dependent_config_variable_values:
public small_vector<dependent_config_variable_value, 1>
{
public:
const dependent_config_variable_value*
find (const string& name) const
{
auto i (find_if (begin (), end (),
[&name] (const dependent_config_variable_value& v)
{
return v.name == name;
}));
return i != end () ? &*i : nullptr;
}
};
class package_configuration: public vector<config_variable_value>
{
public:
package_key package;
bool system = false; // True if system package without skeleton info.
explicit
package_configuration (package_key p): package (move (p)) {}
config_variable_value*
find (const string& name)
{
auto i (find_if (begin (), end (),
[&name] (const config_variable_value& v)
{
return v.name == name;
}));
return i != end () ? &*i : nullptr;
}
const config_variable_value*
find (const string& name) const
{
auto i (find_if (begin (), end (),
[&name] (const config_variable_value& v)
{
return v.name == name;
}));
return i != end () ? &*i : nullptr;
}
// Print buildfile and override configuration variable values as command
// line overrides one per line with the specified indentation. After each
// variable also print in parenthesis its origin. If overrides is not
// NULL, then it is used to override the value/dependent information.
//
void
print (diag_record&, const char* indent,
const dependent_config_variable_values* overrides = nullptr) const;
};
class package_configurations: public small_vector<package_configuration, 1>
{
public:
// Note: may invalidate references.
//
package_configuration&
operator[] (const package_key& p)
{
auto i (find_if (begin (), end (),
[&p] (const package_configuration& pc)
{
return pc.package == p;
}));
if (i != end ())
return *i;
push_back (package_configuration (p));
return back ();
}
void
clear ()
{
small_vector<package_configuration, 1>::clear ();
change_history_.clear ();
}
// Implementation details.
//
public:
// Note: dependent_config_variable_values must be sorted by name.
//
small_vector<dependent_config_variable_values, 2> change_history_;
};
// Negotiate the configuration for the specified dependencies of the
// specified dependent. Return true if the configuration has changed.
// Return absent if has_alternative is true and no acceptable configuration
// could be negotiated.
//
optional<bool>
negotiate_configuration (
package_configurations&,
package_skeleton& dependent,
pair<size_t, size_t> position,
const small_vector<reference_wrapper<package_skeleton>, 1>& dependencies,
bool has_alternative);
}
#endif // BPKG_PACKAGE_CONFIGURATION_HXX
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