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// file : build2/install/rule.hxx -*- C++ -*-
// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BUILD2_INSTALL_RULE_HXX
#define BUILD2_INSTALL_RULE_HXX
#include <libbuild2/types.hxx>
#include <libbuild2/utility.hxx>
#include <libbuild2/rule.hxx>
#include <libbuild2/action.hxx>
#include <libbuild2/target.hxx>
#include <libbuild2/filesystem.hxx>
namespace build2
{
namespace install
{
class alias_rule: public rule
{
public:
virtual bool
match (action, target&, const string&) const override;
// Return NULL if this prerequisite should be ignored and pointer to its
// target otherwise. The default implementation accepts all prerequsites
// from the target's (weak) amalgamation.
//
// The prerequisite is passed as an iterator allowing the filter to
// "see" inside groups.
//
using prerequisite_iterator =
prerequisite_members_range<group_prerequisites>::iterator;
virtual const target*
filter (action, const target&, prerequisite_iterator&) const;
virtual const target*
filter (action, const target&, const prerequisite&) const;
virtual recipe
apply (action, target&) const override;
alias_rule () {}
static const alias_rule instance;
};
class fsdir_rule: public rule
{
public:
virtual bool
match (action, target&, const string&) const override;
virtual recipe
apply (action, target&) const override;
fsdir_rule () {}
static const fsdir_rule instance;
};
// In addition to the alias rule's semantics, this rule sees through to
// the group's members.
//
// The default group_rule::instance matches any target for which it was
// registered. It is to be used for non-see-through groups that should
// exhibit the see-through behavior for install (see lib{} in the bin
// module for an example).
//
// We also register (for all targets) another instance of this rule that
// only matches see-through groups.
//
class group_rule: public alias_rule
{
public:
virtual bool
match (action, target&, const string&) const override;
// Return NULL if this group member should be ignored and pointer to its
// target otherwise. The default implementation accepts all members.
//
virtual const target*
filter (action, const target&, const target& group_member) const;
using alias_rule::filter; // "Unhide" to make Clang happy.
virtual recipe
apply (action, target&) const override;
group_rule (bool see_through_only): see_through (see_through_only) {}
static const group_rule instance;
bool see_through;
};
struct install_dir;
class file_rule: public rule
{
public:
virtual bool
match (action, target&, const string&) const override;
// Return NULL if this prerequisite should be ignored and pointer to its
// target otherwise. The default implementation ignores prerequsites
// that are outside of this target's project.
//
// @@ I wonder why we do weak amalgamation for alias but project for
// file? And then override this for prerequisite libraries/modules
// in cc::install_rule and bash::install_rule...
//
// The prerequisite is passed as an iterator allowing the filter to
// "see" inside groups.
//
using prerequisite_iterator =
prerequisite_members_range<group_prerequisites>::iterator;
virtual const target*
filter (action, const target&, prerequisite_iterator&) const;
virtual const target*
filter (action, const target&, const prerequisite&) const;
virtual recipe
apply (action, target&) const override;
static target_state
perform_update (action, const target&);
// Extra un/installation hooks. Return true if anything was actually
// un/installed.
//
using install_dir = install::install_dir; // For derived rules.
virtual bool
install_extra (const file&, const install_dir&) const;
virtual bool
uninstall_extra (const file&, const install_dir&) const;
// Lower-level pre/post installation hooks that can be used to override
// the source file path being installed (for example, to implement
// post-processing, etc).
//
// Note that one cannot generally perform post-processing in-place
// because of permissions.
//
virtual auto_rmfile
install_pre (const file&, const install_dir&) const;
virtual bool
install_post (const file&, const install_dir&, auto_rmfile&&) const;
// Installation/uninstallation "commands".
//
// If verbose is false, then only print the command at verbosity level 2
// or higher. Note that these functions respect the dry_run flag.
// Install a symlink: base/link -> target.
//
static void
install_l (const scope& rs,
const install_dir& base,
const path& target,
const path& link,
bool verbose);
// Uninstall a file or symlink:
//
// uninstall <target> <base>/ rm <base>/<target>.leaf (); name empty
// uninstall <target> <name> rm <base>/<name>; target can be NULL
//
// Return false if nothing has been removed (i.e., the file does not
// exist).
//
static bool
uninstall_f (const scope& rs,
const install_dir& base,
const file* target,
const path& name,
bool verbose);
target_state
perform_install (action, const target&) const;
target_state
perform_uninstall (action, const target&) const;
static const file_rule instance;
file_rule () {}
};
}
}
#endif // BUILD2_INSTALL_RULE_HXX
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