/*

  * Copyright (C) 2008  Kristian Høgsberg <krh@redhat.com>

  * Copyright (C) 2008  Red Hat, Inc

  * Copyright (C) 2009, 2011, 2012  J. Ali Harlow <ali@juiblex.co.uk>

  *

  * This program is free software; you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation; either version 2 of the License, or

  * (at your option) any later version.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License along

  * with this program; if not, write to the Free Software Foundation, Inc.,

  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

  */

 #ifndef _RAZOR_H_

 #define _RAZOR_H_

 #include <stdint.h>

 #include <sys/types.h>

 /* GCC extensions */

 #if defined(__GNUC__)

 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)

 #define RAZOR_MALLOC __attribute__((__malloc__))

 #else

 #define RAZOR_MALLOC

 #endif

 #if __GNUC__ >= 4

 #define RAZOR_NULL_TERMINATED __attribute__ ((__sentinel__))

 #else

 #define RAZOR_NULL_TERMINATED

 #endif

 #endif	/* __GNUC__ */

 enum razor_section_type {

 	RAZOR_SECTION_MAIN = 0x01,

 	RAZOR_SECTION_DETAILS = 0x02,

 	RAZOR_SECTION_FILES = 0x04,

 	RAZOR_SECTION_ALL = 0x07

 };

 enum razor_stage_type {

 	RAZOR_STAGE_SCRIPTS_PRE = 0x1,

 	RAZOR_STAGE_FILES = 0x2,

 	RAZOR_STAGE_SCRIPTS_POST = 0x4,

 	RAZOR_STAGE_SCRIPTS = 0x5,

 	RAZOR_STAGE_ALL = 0x7

 };

 enum razor_detail_type {

 	RAZOR_DETAIL_LAST = 0,	/* the sentinel */

 	RAZOR_DETAIL_NAME,

 	RAZOR_DETAIL_VERSION,

 	RAZOR_DETAIL_ARCH,

 	RAZOR_DETAIL_SUMMARY,

 	RAZOR_DETAIL_DESCRIPTION,

 	RAZOR_DETAIL_URL,

 	RAZOR_DETAIL_LICENSE,

 	RAZOR_DETAIL_PREUNPROG,

 	RAZOR_DETAIL_PREUN,

 	RAZOR_DETAIL_POSTUNPROG,

 	RAZOR_DETAIL_POSTUN,

 	RAZOR_DETAIL_PREFIXES

 };

 enum razor_property_flags {

 	RAZOR_PROPERTY_LESS		= 1 << 0,

 	RAZOR_PROPERTY_GREATER		= 1 << 1,

 	RAZOR_PROPERTY_EQUAL		= 1 << 2,

 	RAZOR_PROPERTY_RELATION_MASK	=

 		RAZOR_PROPERTY_LESS |

 		RAZOR_PROPERTY_GREATER |

 		RAZOR_PROPERTY_EQUAL,

 	RAZOR_PROPERTY_REQUIRES		= 0 << 3,

 	RAZOR_PROPERTY_PROVIDES		= 1 << 3,

 	RAZOR_PROPERTY_CONFLICTS	= 2 << 3,

 	RAZOR_PROPERTY_OBSOLETES	= 3 << 3,

 	RAZOR_PROPERTY_TYPE_MASK	= 3 << 3,

 	RAZOR_PROPERTY_PRE		= 1 << 5,

 	RAZOR_PROPERTY_POST		= 1 << 6,

 	RAZOR_PROPERTY_PREUN		= 1 << 7,

 	RAZOR_PROPERTY_POSTUN		= 1 << 8,

 	RAZOR_PROPERTY_SCRIPT_MASK	=

 		RAZOR_PROPERTY_PRE |

 		RAZOR_PROPERTY_POST |

 		RAZOR_PROPERTY_PREUN |

 		RAZOR_PROPERTY_POSTUN

 };

 enum razor_set_flags {

 	/*

 	 * Create a private copy of the razor set such that changes made

 	 * to the underlying file are not visible in the razor set.

 	 * If this flag is not set then the caller must ensure that the

 	 * underlying file (if any) is not changed.

 	 */

 	RAZOR_SET_PRIVATE		= 1 << 0,

 };

 /**

  * SECTION:error

  * @title: Error reporting

  * @short_description: A system for reporting errors.

  *

  * This object represents an error condition.

  */

 struct razor_error;

 struct razor_error *razor_error_new_str(const char *path, const char *str);

 #define razor_set_error(error, path, str) \

 	if (error) \

 		*(error) = razor_error_new_str(path, str); \

 	else

 const char *razor_error_get_msg(struct razor_error *error);

 void razor_error_free(struct razor_error *error);

 /**

  * SECTION:atomic

  * @title: Atomic transactions

  * @short_description: File-based transactions that shouldn't half-succeed

  *

  * This is a helper object for issuing a sequence of file-based actions

  * that should either all succeed or all fail.

  *

  * Note that currently only Windows 7 has a native implementation and that

  * while the emulated fallback implementation attempts to rollback the

  * transaction if it fails, this is not guaranteed to succeed and that

  * the transaction is held in core (and thus vulnernable to program crashes,

  * power loss, etc.). This could (and should) be improved.

  *

  * Atomic transactions can be disabled via configure, in which case all

  * bets are off.

  **/

 struct razor_atomic;

 struct razor_atomic *razor_atomic_open(const char *description);

 int razor_atomic_commit(struct razor_atomic *atomic);

 const char *razor_atomic_get_error_msg(struct razor_atomic *atomic);

 void razor_atomic_destroy(struct razor_atomic *atomic);

 /**

  * razor_atomic_make_dirs

  * 

  * Create all sub-directories leading up to path. We know root exists

  * and is a dir, root does not end in a '/', and path either has a

  * leading '/' or (on MS-Windows only) root is the empty string

  * and path starts with drive (eg., "c:/windows").

  * Note: path itself is not created, only the directory in which it

  * (would) exist.

  *

  * Returns: non-zero on error.

  **/

 int razor_atomic_make_dirs(struct razor_atomic *atomic, const char *root,

   const char *path);

 int razor_atomic_remove(struct razor_atomic *atomic, const char *path);

 int razor_atomic_rename_file(struct razor_atomic *atomic, const char *oldpath,

 			     const char *newpath);

 /**

  * razor_atomic_create_dir

  * 

  * Create a directory, replacing any existing object at this path except

  * an existing directory (which is not counted as a error).

  *

  * Returns: non-zero on error.

  */

 int razor_atomic_create_dir(struct razor_atomic *atomic, const char *dirname,

   mode_t mode);

 /**

  * razor_atomic_create_symlink

  * 

  * Create a symbolic link, replacing any existing object at this path except

  * a non-empty directory.

  *

  * Note: This function will always fail on platforms that don't support

  * symbolic links.

  *

  * Returns: non-zero on error.

  */

 int razor_atomic_create_symlink(struct razor_atomic *atomic, const char *target,

   const char *path);

 /**

  * razor_atomic_create_file

  * 

  * Create a file, replacing any existing object at this path except

  * a non-empty directory.

  *

  * Returns: A handle to be passed to razor_atomic_write() and

  * razor_atomic_close() or a negative value on error.

  */

 int razor_atomic_create_file(struct razor_atomic *atomic, const char *filename,

   mode_t mode);

 int razor_atomic_write(struct razor_atomic *atomic, int handle,

   const void *data, size_t size);

 int razor_atomic_close(struct razor_atomic *atomic, int handle);

 int razor_atomic_sync(struct razor_atomic *atomic, int handle);

 void razor_atomic_abort(struct razor_atomic *atomic, const char *error_msg);

 int razor_atomic_in_error_state(struct razor_atomic *atomic);

 /**

  * SECTION:set

  * @title: Package Set

  * @short_description: Represents a set of packages and their metadata.

  *

  * This object represents a set of packages, their dependency

  * information, the file lists and a number of other details.

  **/

 struct razor_set;

 struct razor_package;

 struct razor_property;

 #define RAZOR_HEADER_VERSION		2	/* Current version */

 #define RAZOR_HEADER_VERSION_MIN	1	/* Minimum version we support */

 /**

  * razor_set_create:

  * 

  * Create a new #razor_set object.

  * 

  * Returns: the new #razor_set object.

  **/

 struct razor_set *razor_set_create_without_root(void);

 struct razor_set *razor_set_create(void);

 struct razor_set *

 razor_set_open(const char *filename, enum razor_set_flags flags,

 	       struct razor_error **error);

 uint32_t razor_set_get_header_version(struct razor_set *set);

 int razor_set_set_header_version(struct razor_set *set,

 				 uint32_t header_version);

 void razor_set_unref(struct razor_set *set);

 struct razor_set *razor_set_ref(struct razor_set *set);

 void razor_set_write_to_handle(struct razor_set *set,

 			       struct razor_atomic *atomic, int handle,

 			       uint32_t section_mask);

 int razor_set_write(struct razor_set *set, struct razor_atomic *atomic,

 		    const char *filename, uint32_t setions);

 int

 razor_set_bind_sections(struct razor_set *set, const char *filename,

 			enum razor_set_flags flags, struct razor_error **error);

 struct razor_package *

 razor_set_get_package(struct razor_set *set, const char *package);

 void

 razor_package_get_details(struct razor_set *set,

 			  struct razor_package *package, ...);

 int

 razor_package_remove(struct razor_set *prev, struct razor_set *next,

 		     struct razor_atomic *atomic, struct razor_package *package,

 		     const char *root, int install_count,

 		     enum razor_stage_type stage);

 /**

  * SECTION:iterator

  * @title: Iterators

  * @short_description: Objects for traversing packages or properties.

  *

  * The razor iterator objects provides a way to iterate through a set

  * of packages or properties.

  **/

 struct razor_package_iterator;

 /**

  * razor_package_iterator_create:

  * 

  * Create a new #razor_package_iterator object.

  * 

  * Returns: the new #razor_package_iterator object.

  **/

 struct razor_package_iterator *

 razor_package_iterator_create(struct razor_set *set);

 /**

  * razor_package_iterator_create_for_property:

  * 

  * Create a new #razor_package_iterator object for the packages that

  * own the given property.

  * 

  * Returns: the new #razor_package_iterator object.

  **/

 struct razor_package_iterator *

 razor_package_iterator_create_for_property(struct razor_set *set,

 					   struct razor_property *property);

 /**

  * razor_package_iterator_create_for_file:

  *

  * Create a new #razor_package_iterator object for the packages that

  * contain the given file name.

  *

  * Returns: the new #razor_package_iterator object.

  **/

 struct razor_package_iterator *

 razor_package_iterator_create_for_file(struct razor_set *set,

 				       const char *filename);

 int razor_package_iterator_next(struct razor_package_iterator *pi,

 				struct razor_package **package, ...);

 void razor_package_iterator_destroy(struct razor_package_iterator *pi);

 struct razor_package_query *

 razor_package_query_create(struct razor_set *set);

 void

 razor_package_query_add_package(struct razor_package_query *pq,

 				struct razor_package *p);

 void

 razor_package_query_add_iterator(struct razor_package_query *pq,

 				 struct razor_package_iterator *pi);

 struct razor_package_iterator *

 razor_package_query_finish(struct razor_package_query *pq);

 struct razor_property_iterator;

 struct razor_property_iterator *

 razor_property_iterator_create(struct razor_set *set,

 			       struct razor_package *package);

 int razor_property_iterator_next(struct razor_property_iterator *pi,

 				 struct razor_property **property,

 				 const char **name,

 				 uint32_t *flags,

 				 const char **version);

 void

 razor_property_iterator_destroy(struct razor_property_iterator *pi);

 struct razor_file_iterator;

 struct razor_file_iterator *

 razor_file_iterator_create(struct razor_set *set,

 			   struct razor_package *package, int post_order);

 int razor_file_iterator_next(struct razor_file_iterator *fi,

 			     const char **name);

 void razor_file_iterator_destroy(struct razor_file_iterator *fi);

 void razor_set_list_files(struct razor_set *set, const char *prefix);

 void razor_set_list_package_files(struct razor_set *set,

 				  struct razor_package *package);

 enum razor_diff_action {

 	RAZOR_DIFF_ACTION_ADD,

 	RAZOR_DIFF_ACTION_REMOVE,

 };

 typedef void (*razor_diff_callback_t)(enum razor_diff_action action,

 				      struct razor_package *package,

 				      const char *name,

 				      const char *version,

 				      const char *arch,

 				      void *data);

 void

 razor_set_diff(struct razor_set *set, struct razor_set *upstream,

 	       razor_diff_callback_t callback, void *data);

 struct razor_install_iterator;

 enum razor_install_action {

 	RAZOR_INSTALL_ACTION_ADD,

 	RAZOR_INSTALL_ACTION_REMOVE,

 	RAZOR_INSTALL_ACTION_COMMIT

 };

 struct razor_install_iterator *

 razor_set_create_install_iterator(struct razor_set *set,

 				  struct razor_set *next);

 int razor_install_iterator_next(struct razor_install_iterator *ii,

 				struct razor_package **package,

 				enum razor_install_action *action,

 				int *count);

 /**

  * razor_install_iterator_commit_set

  *

  * Immediately after razor_install_iterator_next() returns

  * RAZOR_INSTALL_ACTION_COMMIT, this function will return the razor_set

  * which should be committed.

  *

  * Returns: a new #razor_set object.

  **/

 struct razor_set *

 razor_install_iterator_commit_set(struct razor_install_iterator *ii);

 void razor_install_iterator_rewind(struct razor_install_iterator *ii);

 size_t razor_install_iterator_tell(struct razor_install_iterator *ii);

 size_t razor_install_iterator_seek(struct razor_install_iterator *ii,

 				   size_t pos);

 void razor_install_iterator_destroy(struct razor_install_iterator *ii);

 /**

  * SECTION:transaction

  * @title: Transaction

  * @short_description: Create a new package set by merging two or more sets.

  *

  * The razor transaction object provides a way to create a new package set

  * from packages from one or more other package sets.

  **/

 struct razor_rpm;

 struct razor_transaction *

 razor_transaction_create(struct razor_set *system, struct razor_set *upstream);

 void razor_transaction_install_package(struct razor_transaction *transaction,

 				       struct razor_package *package);

 void razor_transaction_remove_package(struct razor_transaction *transaction,

 				      struct razor_package *package);

 void razor_transaction_update_package(struct razor_transaction *trans,

 				      struct razor_package *package);

 void razor_transaction_fixup_package(struct razor_transaction *trans,

 				     struct razor_package *package,

 				     struct razor_rpm *rpm);

 void razor_transaction_update_all(struct razor_transaction *transaction);

 int razor_transaction_resolve(struct razor_transaction *trans);

 int razor_transaction_describe(struct razor_transaction *trans);

 struct razor_set *razor_transaction_commit(struct razor_transaction *trans);

 void razor_transaction_destroy(struct razor_transaction *trans);

 /* Temporary helper for test suite. */

 int razor_transaction_unsatisfied_property(struct razor_transaction *trans,

 					   const char *name,

 					   uint32_t flags,

 					   const char *version);

 /**

  * SECTION:rpm

  * @title: Razor RPM

  * @short_description: Operating on RPM files.

  *

  * Functions for open RPM files and extracting information and

  * installing or removing RPM files.

  **/

 struct razor_relocations;

 struct razor_relocations *razor_relocations_create(void);

 void razor_relocations_add(struct razor_relocations *relocations,

 			   const char *oldpath, const char *newpath);

 void razor_relocations_set_rpm(struct razor_relocations *relocations,

 			       struct razor_rpm *rpm);

 const char *razor_relocations_apply(struct razor_relocations *relocations,

 				    const char *path);

 void razor_relocations_destroy(struct razor_relocations *relocations);

 struct razor_rpm *razor_rpm_open(const char *filename,

 				 struct razor_atomic *atomic);

 void razor_rpm_get_details(struct razor_rpm *rpm, ...);

 void razor_rpm_set_relocations(struct razor_rpm *rpm,

 			       struct razor_relocations *relocations);

 int razor_rpm_install(struct razor_rpm *rpm, struct razor_atomic *atomic,

 		      const char *root, int install_count,

 		      enum razor_stage_type stage);

 int razor_rpm_close(struct razor_rpm *rpm);

 /**

  * SECTION:importer

  * @title: Importer

  * @short_description: A mechanism for building #razor_set objects

  *

  * The %razor_importer is a helper object for building a razor set

  * from external sources, like yum metadata, the RPM database or RPM

  * files.

  *

  * The importer is a stateful object; it has the notion of a current

  * package, and the caller can provide meta data such as properties,

  * files and similiar for the package as it becomes available.  Once a

  * package is fully described, the next pacakge can begin.  When all

  * packages have been described to the importer, the importer will

  * create a new %razor_set with the specified packages.

  *

  * A typical use

  * of the importer will follow this template:

  * |[

  * importer = razor_importer_create();

  *

  * while ( /<!-- -->* more packages to import *<!-- -->/; ) {

  *   /<!-- -->* get name, version and arch of next package *<!-- -->/

  *   razor_importer_begin_package(importer, name, version, arch);

  *   razor_importer_add_details(importer, summary, description, url, license);

  *

  *   while ( /<!-- -->* more properties to add *<!-- -->/ )

  *     razor_importer_add_property(importer, name, flags, version);

  *

  *   while ( /<!-- -->* [more files to add *<!-- -->/ )

  *     razor_importer_add_file(importer, name);

  *

  *   razor_importer_finish_package(importer);

  * }

  *

  * return razor_importer_finish(importer);

  * ]|

  **/

 struct razor_importer;

 struct razor_importer *razor_importer_create(void);

 void razor_importer_destroy(struct razor_importer *importer);

 void razor_importer_begin_package(struct razor_importer *importer,

 				  const char *name,

 				  const char *version,

 				  const char *arch);

 void razor_importer_add_details(struct razor_importer *importer,

 				const char *summary,

 				const char *description,

 				const char *url,

 				const char *license);

 void razor_importer_add_script(struct razor_importer *importer,

 			       enum razor_property_flags script,

 			       const char *program,

 			       const char *body);

 void razor_importer_add_install_prefix(struct razor_importer *importer,

 				       const char *install_prefix);

 void razor_importer_add_property(struct razor_importer *importer,

 				 const char *name,

 				 uint32_t flags,

 				 const char *version);

 void razor_importer_add_file(struct razor_importer *importer,

 			     const char *name);

 void razor_importer_finish_package(struct razor_importer *importer);

 int razor_importer_add_rpm(struct razor_importer *importer,

 			   struct razor_rpm *rpm);

 struct razor_set *razor_importer_finish(struct razor_importer *importer);

 struct razor_set *razor_set_create_from_yum(void);

 struct razor_set *razor_set_create_from_rpmdb(void);

 /**

  * SECTION:root

  * @title: Root

  * @short_description: Functions for accessing an install root.

  *

  * The #razor_root object encapsulate access to and locking of a razor

  * install root.

  **/

 struct razor_root;

 int razor_root_create(const char *root);

 struct razor_root *

 razor_root_open(const char *root, struct razor_error **error);

 struct razor_set *

 razor_root_open_read_only(const char *root, struct razor_error **error);

 struct razor_set *razor_root_get_system_set(struct razor_root *root);

 int razor_root_close(struct razor_root *root);

 int

 razor_root_update(struct razor_root *root, struct razor_set *next,

 		  struct razor_atomic *atomic);

 /**

  * SECTION:misc

  * @title: Miscellaneous Functions

  * @short_description: Various helper functions

  *

  * Functions that doesn't fit anywhere else.

  **/

 const char *

 razor_property_relation_to_string(struct razor_property *p);

 const char *

 razor_property_type_to_string(struct razor_property *p);

 void razor_build_evr(char *evr_buf, int size, const char *epoch,

 		     const char *version, const char *release);

 int razor_versioncmp(const char *s1, const char *s2);

 void razor_disable_root_name_checks(int disable);

 void razor_set_lua_loader(const char *modname, void (*loader)());

 void (*razor_get_lua_loader(const char *modname))();

 char *razor_concat(const char *s, ...) RAZOR_MALLOC RAZOR_NULL_TERMINATED;

 const char *razor_system_arch(void);

 #endif /* _RAZOR_H_ */