git/commit.h
Linus Arver 7cb26a1722 commit: ignore_non_trailer computes number of bytes to ignore
ignore_non_trailer() returns the _number of bytes_ that should be
ignored from the end of the log message. It does not by itself "ignore"
anything.

Rename this function to remove the leading "ignore" verb, to sound more
like a quantity than an action.

Signed-off-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-10-20 14:25:12 -07:00

375 lines
13 KiB
C

#ifndef COMMIT_H
#define COMMIT_H
#include "object.h"
struct signature_check;
struct strbuf;
struct tree;
#define COMMIT_NOT_FROM_GRAPH 0xFFFFFFFF
#define GENERATION_NUMBER_INFINITY ((1ULL << 63) - 1)
#define GENERATION_NUMBER_V1_MAX 0x3FFFFFFF
#define GENERATION_NUMBER_ZERO 0
#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 int no_graft_file_deprecated_advice;
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 {
DECORATION_NONE = 0,
DECORATION_REF_LOCAL,
DECORATION_REF_REMOTE,
DECORATION_REF_TAG,
DECORATION_REF_STASH,
DECORATION_REF_HEAD,
DECORATION_GRAFTED,
};
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);
/*
* Look up commit named by "oid" respecting replacement objects.
* Returns NULL if "oid" is not a commit or does not exist.
*/
struct commit *lookup_commit_object(struct repository *r, const struct object_id *oid);
/*
* Look up commit named by "oid" without replacement objects or
* checking for object existence. Returns the requested commit if it
* is found in the object cache, NULL if "oid" is in the object cache
* but is not a commit and a newly allocated unparsed commit object if
* "oid" is not in the object cache.
*/
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);
}
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 repo_unuse_commit_buffer when the caller is done.
*/
const void *repo_get_commit_buffer(struct repository *r,
const struct commit *,
unsigned long *size);
/*
* 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 repo_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);
/*
* 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 *);
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 */
const char *repo_logmsg_reencode(struct repository *r,
const struct commit *commit,
char **commit_encoding,
const char *output_encoding);
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 {
REV_SORT_IN_GRAPH_ORDER = 0,
REV_SORT_BY_COMMIT_DATE,
REV_SORT_BY_AUTHOR_DATE
};
/*
* 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);
void reset_commit_grafts(struct repository *r);
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);
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".
* Reads up to "len" bytes of "msg".
* 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_header_mem(const char *msg, size_t len,
const char *key,
size_t *out_len);
const char *find_commit_header(const char *msg, const char *key,
size_t *out_len);
/* Find the number of bytes to ignore from the end of a log message. */
size_t ignored_log_message_bytes(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);
LAST_ARG_MUST_BE_NULL
int run_commit_hook(int editor_is_used, const char *index_file,
int *invoked_hook, 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 */