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![Phillip Wood](/assets/img/avatar_default.png)
The state files for 'onto' and 'orig_head' should contain a full hex oid, change the reading functions from get_oid() to get_oid_hex() to reflect this. They should also name commits and not tags so add and use a function that looks up a commit from an oid like lookup_commit_reference() but without dereferencing tags. Suggested-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
399 lines
14 KiB
C
399 lines
14 KiB
C
#ifndef COMMIT_H
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#define COMMIT_H
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#include "object.h"
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#include "tree.h"
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#include "strbuf.h"
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#include "decorate.h"
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#include "gpg-interface.h"
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#include "string-list.h"
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#include "pretty.h"
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#include "commit-slab.h"
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#define COMMIT_NOT_FROM_GRAPH 0xFFFFFFFF
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#define GENERATION_NUMBER_INFINITY ((1ULL << 63) - 1)
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#define GENERATION_NUMBER_V1_MAX 0x3FFFFFFF
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#define GENERATION_NUMBER_ZERO 0
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#define GENERATION_NUMBER_V2_OFFSET_MAX ((1ULL << 31) - 1)
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struct commit_list {
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struct commit *item;
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struct commit_list *next;
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};
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/*
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* The size of this struct matters in full repo walk operations like
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* 'git clone' or 'git gc'. Consider using commit-slab to attach data
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* to a commit instead of adding new fields here.
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*/
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struct commit {
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struct object object;
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timestamp_t date;
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struct commit_list *parents;
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/*
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* If the commit is loaded from the commit-graph file, then this
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* member may be NULL. Only access it through repo_get_commit_tree()
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* or get_commit_tree_oid().
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*/
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struct tree *maybe_tree;
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unsigned int index;
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};
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extern int save_commit_buffer;
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extern int no_graft_file_deprecated_advice;
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extern const char *commit_type;
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/* While we can decorate any object with a name, it's only used for commits.. */
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struct name_decoration {
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struct name_decoration *next;
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int type;
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char name[FLEX_ARRAY];
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};
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enum decoration_type {
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DECORATION_NONE = 0,
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DECORATION_REF_LOCAL,
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DECORATION_REF_REMOTE,
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DECORATION_REF_TAG,
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DECORATION_REF_STASH,
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DECORATION_REF_HEAD,
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DECORATION_GRAFTED,
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};
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void add_name_decoration(enum decoration_type type, const char *name, struct object *obj);
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const struct name_decoration *get_name_decoration(const struct object *obj);
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/*
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* Look up commit named by "oid" respecting replacement objects.
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* Returns NULL if "oid" is not a commit or does not exist.
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*/
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struct commit *lookup_commit_object(struct repository *r, const struct object_id *oid);
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/*
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* Look up commit named by "oid" without replacement objects or
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* checking for object existence. Returns the requested commit if it
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* is found in the object cache, NULL if "oid" is in the object cache
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* but is not a commit and a newly allocated unparsed commit object if
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* "oid" is not in the object cache.
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*/
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struct commit *lookup_commit(struct repository *r, const struct object_id *oid);
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struct commit *lookup_commit_reference(struct repository *r,
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const struct object_id *oid);
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struct commit *lookup_commit_reference_gently(struct repository *r,
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const struct object_id *oid,
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int quiet);
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struct commit *lookup_commit_reference_by_name(const char *name);
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/*
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* Look up object named by "oid", dereference tag as necessary,
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* get a commit and return it. If "oid" does not dereference to
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* a commit, use ref_name to report an error and die.
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*/
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struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name);
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int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph);
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int repo_parse_commit_internal(struct repository *r, struct commit *item,
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int quiet_on_missing, int use_commit_graph);
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int repo_parse_commit_gently(struct repository *r,
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struct commit *item,
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int quiet_on_missing);
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static inline int repo_parse_commit(struct repository *r, struct commit *item)
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{
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return repo_parse_commit_gently(r, item, 0);
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}
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static inline int repo_parse_commit_no_graph(struct repository *r,
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struct commit *commit)
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{
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return repo_parse_commit_internal(r, commit, 0, 0);
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}
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#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
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#define parse_commit_internal(item, quiet, use) repo_parse_commit_internal(the_repository, item, quiet, use)
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#define parse_commit(item) repo_parse_commit(the_repository, item)
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#endif
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void parse_commit_or_die(struct commit *item);
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struct buffer_slab;
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struct buffer_slab *allocate_commit_buffer_slab(void);
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void free_commit_buffer_slab(struct buffer_slab *bs);
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/*
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* Associate an object buffer with the commit. The ownership of the
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* memory is handed over to the commit, and must be free()-able.
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*/
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void set_commit_buffer(struct repository *r, struct commit *, void *buffer, unsigned long size);
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/*
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* Get any cached object buffer associated with the commit. Returns NULL
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* if none. The resulting memory should not be freed.
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*/
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const void *get_cached_commit_buffer(struct repository *, const struct commit *, unsigned long *size);
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/*
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* Get the commit's object contents, either from cache or by reading the object
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* from disk. The resulting memory should not be modified, and must be given
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* to unuse_commit_buffer when the caller is done.
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*/
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const void *repo_get_commit_buffer(struct repository *r,
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const struct commit *,
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unsigned long *size);
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#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
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#define get_commit_buffer(c, s) repo_get_commit_buffer(the_repository, c, s)
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#endif
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/*
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* Tell the commit subsystem that we are done with a particular commit buffer.
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* The commit and buffer should be the input and return value, respectively,
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* from an earlier call to get_commit_buffer. The buffer may or may not be
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* freed by this call; callers should not access the memory afterwards.
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*/
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void repo_unuse_commit_buffer(struct repository *r,
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const struct commit *,
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const void *buffer);
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#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
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#define unuse_commit_buffer(c, b) repo_unuse_commit_buffer(the_repository, c, b)
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#endif
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/*
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* Free any cached object buffer associated with the commit.
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*/
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void free_commit_buffer(struct parsed_object_pool *pool, struct commit *);
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struct tree *repo_get_commit_tree(struct repository *, const struct commit *);
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#define get_commit_tree(c) repo_get_commit_tree(the_repository, c)
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struct object_id *get_commit_tree_oid(const struct commit *);
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/*
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* Release memory related to a commit, including the parent list and
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* any cached object buffer.
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*/
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void release_commit_memory(struct parsed_object_pool *pool, struct commit *c);
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/*
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* Disassociate any cached object buffer from the commit, but do not free it.
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* The buffer (or NULL, if none) is returned.
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*/
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const void *detach_commit_buffer(struct commit *, unsigned long *sizep);
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/* Find beginning and length of commit subject. */
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int find_commit_subject(const char *commit_buffer, const char **subject);
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/* Return length of the commit subject from commit log message. */
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size_t commit_subject_length(const char *body);
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struct commit_list *commit_list_insert(struct commit *item,
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struct commit_list **list);
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int commit_list_contains(struct commit *item,
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struct commit_list *list);
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struct commit_list **commit_list_append(struct commit *commit,
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struct commit_list **next);
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unsigned commit_list_count(const struct commit_list *l);
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struct commit_list *commit_list_insert_by_date(struct commit *item,
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struct commit_list **list);
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void commit_list_sort_by_date(struct commit_list **list);
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/* Shallow copy of the input list */
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struct commit_list *copy_commit_list(struct commit_list *list);
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/* Modify list in-place to reverse it, returning new head; list will be tail */
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struct commit_list *reverse_commit_list(struct commit_list *list);
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void free_commit_list(struct commit_list *list);
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struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
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int has_non_ascii(const char *text);
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const char *logmsg_reencode(const struct commit *commit,
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char **commit_encoding,
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const char *output_encoding);
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const char *repo_logmsg_reencode(struct repository *r,
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const struct commit *commit,
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char **commit_encoding,
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const char *output_encoding);
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#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
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#define logmsg_reencode(c, enc, out) repo_logmsg_reencode(the_repository, c, enc, out)
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#endif
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const char *skip_blank_lines(const char *msg);
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/** Removes the first commit from a list sorted by date, and adds all
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* of its parents.
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**/
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struct commit *pop_most_recent_commit(struct commit_list **list,
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unsigned int mark);
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struct commit *pop_commit(struct commit_list **stack);
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void clear_commit_marks(struct commit *commit, unsigned int mark);
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void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark);
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enum rev_sort_order {
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REV_SORT_IN_GRAPH_ORDER = 0,
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REV_SORT_BY_COMMIT_DATE,
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REV_SORT_BY_AUTHOR_DATE
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};
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/*
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* Performs an in-place topological sort of list supplied.
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*
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* invariant of resulting list is:
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* a reachable from b => ord(b) < ord(a)
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* sort_order further specifies:
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* REV_SORT_IN_GRAPH_ORDER: try to show a commit on a single-parent
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* chain together.
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* REV_SORT_BY_COMMIT_DATE: show eligible commits in committer-date order.
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*/
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void sort_in_topological_order(struct commit_list **, enum rev_sort_order);
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struct commit_graft {
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struct object_id oid;
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int nr_parent; /* < 0 if shallow commit */
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struct object_id parent[FLEX_ARRAY]; /* more */
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};
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typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
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struct commit_graft *read_graft_line(struct strbuf *line);
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/* commit_graft_pos returns an index into r->parsed_objects->grafts. */
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int commit_graft_pos(struct repository *r, const struct object_id *oid);
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int register_commit_graft(struct repository *r, struct commit_graft *, int);
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void prepare_commit_graft(struct repository *r);
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struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid);
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void reset_commit_grafts(struct repository *r);
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struct commit *get_fork_point(const char *refname, struct commit *commit);
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/* largest positive number a signed 32-bit integer can contain */
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#define INFINITE_DEPTH 0x7fffffff
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struct oid_array;
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struct ref;
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int for_each_commit_graft(each_commit_graft_fn, void *);
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int interactive_add(const char **argv, const char *prefix, int patch);
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int run_add_interactive(const char *revision, const char *patch_mode,
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const struct pathspec *pathspec);
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struct commit_extra_header {
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struct commit_extra_header *next;
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char *key;
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char *value;
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size_t len;
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};
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void append_merge_tag_headers(struct commit_list *parents,
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struct commit_extra_header ***tail);
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int commit_tree(const char *msg, size_t msg_len,
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const struct object_id *tree,
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struct commit_list *parents, struct object_id *ret,
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const char *author, const char *sign_commit);
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int commit_tree_extended(const char *msg, size_t msg_len,
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const struct object_id *tree,
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struct commit_list *parents, struct object_id *ret,
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const char *author, const char *committer,
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const char *sign_commit, struct commit_extra_header *);
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struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
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void free_commit_extra_headers(struct commit_extra_header *extra);
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/*
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* Search the commit object contents given by "msg" for the header "key".
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* Reads up to "len" bytes of "msg".
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* Returns a pointer to the start of the header contents, or NULL. The length
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* of the header, up to the first newline, is returned via out_len.
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*
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* Note that some headers (like mergetag) may be multi-line. It is the caller's
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* responsibility to parse further in this case!
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*/
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const char *find_header_mem(const char *msg, size_t len,
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const char *key,
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size_t *out_len);
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const char *find_commit_header(const char *msg, const char *key,
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size_t *out_len);
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/* Find the end of the log message, the right place for a new trailer. */
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size_t ignore_non_trailer(const char *buf, size_t len);
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typedef int (*each_mergetag_fn)(struct commit *commit, struct commit_extra_header *extra,
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void *cb_data);
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int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data);
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struct merge_remote_desc {
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struct object *obj; /* the named object, could be a tag */
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char name[FLEX_ARRAY];
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};
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struct merge_remote_desc *merge_remote_util(struct commit *);
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void set_merge_remote_desc(struct commit *commit,
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const char *name, struct object *obj);
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/*
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* Given "name" from the command line to merge, find the commit object
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* and return it, while storing merge_remote_desc in its ->util field,
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* to allow callers to tell if we are told to merge a tag.
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*/
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struct commit *get_merge_parent(const char *name);
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int parse_signed_commit(const struct commit *commit,
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struct strbuf *message, struct strbuf *signature,
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const struct git_hash_algo *algop);
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int remove_signature(struct strbuf *buf);
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/*
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* Check the signature of the given commit. The result of the check is stored
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* in sig->check_result, 'G' for a good signature, 'U' for a good signature
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* from an untrusted signer, 'B' for a bad signature and 'N' for no signature
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* at all. This may allocate memory for sig->gpg_output, sig->gpg_status,
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* sig->signer and sig->key.
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*/
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int check_commit_signature(const struct commit *commit, struct signature_check *sigc);
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/* record author-date for each commit object */
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struct author_date_slab;
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void record_author_date(struct author_date_slab *author_date,
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struct commit *commit);
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int compare_commits_by_author_date(const void *a_, const void *b_, void *unused);
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/*
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* Verify a single commit with check_commit_signature() and die() if it is not
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* a good signature. This isn't really suitable for general use, but is a
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* helper to implement consistent logic for pull/merge --verify-signatures.
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*
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* The check_trust parameter is meant for backward-compatibility. The GPG
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* interface verifies key trust with a default trust level that is below the
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* default trust level for merge operations. Its value should be non-zero if
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* the user hasn't set a minimum trust level explicitly in their configuration.
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*
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* If the user has set a minimum trust level, then that value should be obeyed
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* and check_trust should be zero, even if the configured trust level is below
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* the default trust level for merges.
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*/
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void verify_merge_signature(struct commit *commit, int verbose,
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int check_trust);
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int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused);
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int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused);
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LAST_ARG_MUST_BE_NULL
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int run_commit_hook(int editor_is_used, const char *index_file,
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int *invoked_hook, const char *name, ...);
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/* Sign a commit or tag buffer, storing the result in a header. */
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int sign_with_header(struct strbuf *buf, const char *keyid);
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/* Parse the signature out of a header. */
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int parse_buffer_signed_by_header(const char *buffer,
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unsigned long size,
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struct strbuf *payload,
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struct strbuf *signature,
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const struct git_hash_algo *algop);
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#endif /* COMMIT_H */
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