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+// file : build2/install/rule.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#ifndef BUILD2_INSTALL_RULE_HXX
+#define BUILD2_INSTALL_RULE_HXX
+
+#include <build2/types.hxx>
+#include <build2/utility.hxx>
+
+#include <build2/rule.hxx>
+#include <build2/target.hxx>
+#include <build2/operation.hxx>
+
+namespace build2
+{
+ namespace install
+ {
+ class alias_rule: public rule
+ {
+ public:
+ alias_rule () {}
+
+ virtual match_result
+ match (action, target&, const string&) const override;
+
+ virtual recipe
+ apply (action, target&) const override;
+ };
+
+ struct install_dir;
+
+ class file_rule: public rule
+ {
+ public:
+ file_rule () {}
+
+ virtual match_result
+ match (action, target&, const string&) const override;
+
+ virtual recipe
+ apply (action, target&) 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.
+ //
+ virtual const target*
+ filter (action, const target&, prerequisite_member) const;
+
+ // Extra installation hooks.
+ //
+ using install_dir = install::install_dir;
+
+ virtual void
+ install_extra (const file&, const install_dir&) const;
+
+ // Return true if anything was uninstalled.
+ //
+ virtual bool
+ uninstall_extra (const file&, const install_dir&) const;
+
+ // Installation "commands".
+ //
+ // If verbose is false, then only print the command at verbosity level 2
+ // or higher.
+ //
+ public:
+ // Install a symlink: base/link -> target.
+ //
+ static void
+ install_l (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 install_dir& base,
+ const file* t,
+ const path& name,
+ bool verbose);
+
+ private:
+ target_state
+ perform_install (action, const target&) const;
+
+ target_state
+ perform_uninstall (action, const target&) const;
+ };
+ }
+}
+
+#endif // BUILD2_INSTALL_RULE_HXX