git/remote.h
Nguyễn Thái Ngọc Duy 4820a33baa fetch: support fetching from a shallow repository
This patch just put together pieces from the 8 steps patch. We stop at
step 7 and reject refs that require new shallow commits.

Note that, by rejecting refs that require new shallow commits, we
leave dangling objects in the repo, which become "object islands" by
the next "git fetch" of the same source.

If the first fetch our "ours" set is zero and we do practically
nothing at step 7, "ours" is full at the next fetch and we may need to
walk through commits for reachability test. Room for improvement.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-12-10 16:14:17 -08:00

259 lines
6.5 KiB
C

#ifndef REMOTE_H
#define REMOTE_H
#include "parse-options.h"
enum {
REMOTE_CONFIG,
REMOTE_REMOTES,
REMOTE_BRANCHES
};
struct remote {
const char *name;
int origin;
const char *foreign_vcs;
const char **url;
int url_nr;
int url_alloc;
const char **pushurl;
int pushurl_nr;
int pushurl_alloc;
const char **push_refspec;
struct refspec *push;
int push_refspec_nr;
int push_refspec_alloc;
const char **fetch_refspec;
struct refspec *fetch;
int fetch_refspec_nr;
int fetch_refspec_alloc;
/*
* -1 to never fetch tags
* 0 to auto-follow tags on heuristic (default)
* 1 to always auto-follow tags
* 2 to always fetch tags
*/
int fetch_tags;
int skip_default_update;
int mirror;
int prune;
const char *receivepack;
const char *uploadpack;
/*
* for curl remotes only
*/
char *http_proxy;
};
struct remote *remote_get(const char *name);
struct remote *pushremote_get(const char *name);
int remote_is_configured(const char *name);
typedef int each_remote_fn(struct remote *remote, void *priv);
int for_each_remote(each_remote_fn fn, void *priv);
int remote_has_url(struct remote *remote, const char *url);
struct refspec {
unsigned force : 1;
unsigned pattern : 1;
unsigned matching : 1;
unsigned exact_sha1 : 1;
char *src;
char *dst;
};
extern const struct refspec *tag_refspec;
struct ref {
struct ref *next;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
unsigned char old_sha1_expect[20]; /* used by expect-old */
char *symref;
unsigned int
force:1,
forced_update:1,
expect_old_sha1:1,
expect_old_no_trackback:1,
deletion:1,
matched:1;
/*
* Order is important here, as we write to FETCH_HEAD
* in numeric order. And the default NOT_FOR_MERGE
* should be 0, so that xcalloc'd structures get it
* by default.
*/
enum {
FETCH_HEAD_MERGE = -1,
FETCH_HEAD_NOT_FOR_MERGE = 0,
FETCH_HEAD_IGNORE = 1
} fetch_head_status;
enum {
REF_STATUS_NONE = 0,
REF_STATUS_OK,
REF_STATUS_REJECT_NONFASTFORWARD,
REF_STATUS_REJECT_ALREADY_EXISTS,
REF_STATUS_REJECT_NODELETE,
REF_STATUS_REJECT_FETCH_FIRST,
REF_STATUS_REJECT_NEEDS_FORCE,
REF_STATUS_REJECT_STALE,
REF_STATUS_REJECT_SHALLOW,
REF_STATUS_UPTODATE,
REF_STATUS_REMOTE_REJECT,
REF_STATUS_EXPECTING_REPORT
} status;
char *remote_status;
struct ref *peer_ref; /* when renaming */
char name[FLEX_ARRAY]; /* more */
};
#define REF_NORMAL (1u << 0)
#define REF_HEADS (1u << 1)
#define REF_TAGS (1u << 2)
extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
struct ref *alloc_ref(const char *name);
struct ref *copy_ref(const struct ref *ref);
struct ref *copy_ref_list(const struct ref *ref);
void sort_ref_list(struct ref **, int (*cmp)(const void *, const void *));
int ref_compare_name(const void *, const void *);
int check_ref_type(const struct ref *ref, int flags);
/*
* Frees the entire list and peers of elements.
*/
void free_refs(struct ref *ref);
struct sha1_array;
extern struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
struct ref **list, unsigned int flags,
struct sha1_array *extra_have,
struct sha1_array *shallow);
int resolve_remote_symref(struct ref *ref, struct ref *list);
int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1);
/*
* Removes and frees any duplicate refs in the map.
*/
void ref_remove_duplicates(struct ref *ref_map);
int valid_fetch_refspec(const char *refspec);
struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec);
void free_refspec(int nr_refspec, struct refspec *refspec);
char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
const char *name);
int match_push_refs(struct ref *src, struct ref **dst,
int nr_refspec, const char **refspec, int all);
void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
int force_update);
/*
* Given a list of the remote refs and the specification of things to
* fetch, makes a (separate) list of the refs to fetch and the local
* refs to store into.
*
* *tail is the pointer to the tail pointer of the list of results
* beforehand, and will be set to the tail pointer of the list of
* results afterward.
*
* missing_ok is usually false, but when we are adding branch.$name.merge
* it is Ok if the branch is not at the remote anymore.
*/
int get_fetch_map(const struct ref *remote_refs, const struct refspec *refspec,
struct ref ***tail, int missing_ok);
struct ref *get_remote_ref(const struct ref *remote_refs, const char *name);
/*
* For the given remote, reads the refspec's src and sets the other fields.
*/
int remote_find_tracking(struct remote *remote, struct refspec *refspec);
struct branch {
const char *name;
const char *refname;
const char *remote_name;
struct remote *remote;
const char **merge_name;
struct refspec **merge;
int merge_nr;
int merge_alloc;
};
struct branch *branch_get(const char *name);
int branch_has_merge_config(struct branch *branch);
int branch_merge_matches(struct branch *, int n, const char *);
/* Flags to match_refs. */
enum match_refs_flags {
MATCH_REFS_NONE = 0,
MATCH_REFS_ALL = (1 << 0),
MATCH_REFS_MIRROR = (1 << 1),
MATCH_REFS_PRUNE = (1 << 2),
MATCH_REFS_FOLLOW_TAGS = (1 << 3)
};
/* Reporting of tracking info */
int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs);
int format_tracking_info(struct branch *branch, struct strbuf *sb);
struct ref *get_local_heads(void);
/*
* Find refs from a list which are likely to be pointed to by the given HEAD
* ref. If 'all' is false, returns the most likely ref; otherwise, returns a
* list of all candidate refs. If no match is found (or 'head' is NULL),
* returns NULL. All returns are newly allocated and should be freed.
*/
struct ref *guess_remote_head(const struct ref *head,
const struct ref *refs,
int all);
/* Return refs which no longer exist on remote */
struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map);
/*
* Compare-and-swap
*/
#define CAS_OPT_NAME "force-with-lease"
struct push_cas_option {
unsigned use_tracking_for_rest:1;
struct push_cas {
unsigned char expect[20];
unsigned use_tracking:1;
char *refname;
} *entry;
int nr;
int alloc;
};
extern int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
extern int parse_push_cas_option(struct push_cas_option *, const char *arg, int unset);
extern void clear_cas_option(struct push_cas_option *);
extern int is_empty_cas(const struct push_cas_option *);
void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);
#endif