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13 KiB

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