3a3b9d8cde
One of the problems with multiple worktree is accessing per-worktree
refs of one worktree from another worktree. This was sort of solved by
multiple ref store, where the code can open the ref store of another
worktree and has access to the ref space of that worktree.
The problem with this is reporting. "HEAD" in another ref space is
also called "HEAD" like in the current ref space. In order to
differentiate them, all the code must somehow carry the ref store
around and print something like "HEAD from this ref store".
But that is not feasible (or possible with a _lot_ of work). With the
current design, we pass a reference around as a string (so called
"refname"). Extending this design to pass a string _and_ a ref store
is a nightmare, especially when handling extended SHA-1 syntax.
So we do it another way. Instead of entering a separate ref space, we
make refs from other worktrees available in the current ref space. So
"HEAD" is always HEAD of the current worktree, but then we can have
"worktrees/blah/HEAD" to denote HEAD from a worktree named
"blah". This syntax coincidentally matches the underlying directory
structure which makes implementation a bit easier.
The main worktree has to be treated specially because well... it's
special from the beginning. So HEAD from the main worktree is
acccessible via the name "main-worktree/HEAD" instead of
"worktrees/main/HEAD" because "main" could be just another secondary
worktree.
This patch also makes it possible to specify refs from one worktree in
another one, e.g.
git log worktrees/foo/HEAD
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
#ifndef WORKTREE_H
|
|
#define WORKTREE_H
|
|
|
|
#include "cache.h"
|
|
#include "refs.h"
|
|
|
|
struct strbuf;
|
|
|
|
struct worktree {
|
|
char *path;
|
|
char *id;
|
|
char *head_ref; /* NULL if HEAD is broken or detached */
|
|
char *lock_reason; /* internal use */
|
|
struct object_id head_oid;
|
|
int is_detached;
|
|
int is_bare;
|
|
int is_current;
|
|
int lock_reason_valid;
|
|
};
|
|
|
|
/* Functions for acting on the information about worktrees. */
|
|
|
|
#define GWT_SORT_LINKED (1 << 0) /* keeps linked worktrees sorted */
|
|
|
|
/*
|
|
* Get the worktrees. The primary worktree will always be the first returned,
|
|
* and linked worktrees will be pointed to by 'next' in each subsequent
|
|
* worktree. No specific ordering is done on the linked worktrees.
|
|
*
|
|
* The caller is responsible for freeing the memory from the returned
|
|
* worktree(s).
|
|
*/
|
|
extern struct worktree **get_worktrees(unsigned flags);
|
|
|
|
/*
|
|
* Returns 1 if linked worktrees exist, 0 otherwise.
|
|
*/
|
|
extern int submodule_uses_worktrees(const char *path);
|
|
|
|
/*
|
|
* Return git dir of the worktree. Note that the path may be relative.
|
|
* If wt is NULL, git dir of current worktree is returned.
|
|
*/
|
|
extern const char *get_worktree_git_dir(const struct worktree *wt);
|
|
|
|
/*
|
|
* Search a worktree that can be unambiguously identified by
|
|
* "arg". "prefix" must not be NULL.
|
|
*/
|
|
extern struct worktree *find_worktree(struct worktree **list,
|
|
const char *prefix,
|
|
const char *arg);
|
|
|
|
/*
|
|
* Return true if the given worktree is the main one.
|
|
*/
|
|
extern int is_main_worktree(const struct worktree *wt);
|
|
|
|
/*
|
|
* Return the reason string if the given worktree is locked or NULL
|
|
* otherwise.
|
|
*/
|
|
extern const char *is_worktree_locked(struct worktree *wt);
|
|
|
|
#define WT_VALIDATE_WORKTREE_MISSING_OK (1 << 0)
|
|
|
|
/*
|
|
* Return zero if the worktree is in good condition. Error message is
|
|
* returned if "errmsg" is not NULL.
|
|
*/
|
|
extern int validate_worktree(const struct worktree *wt,
|
|
struct strbuf *errmsg,
|
|
unsigned flags);
|
|
|
|
/*
|
|
* Update worktrees/xxx/gitdir with the new path.
|
|
*/
|
|
extern void update_worktree_location(struct worktree *wt,
|
|
const char *path_);
|
|
|
|
/*
|
|
* Free up the memory for worktree(s)
|
|
*/
|
|
extern void free_worktrees(struct worktree **);
|
|
|
|
/*
|
|
* Check if a per-worktree symref points to a ref in the main worktree
|
|
* or any linked worktree, and return the worktree that holds the ref,
|
|
* or NULL otherwise. The result may be destroyed by the next call.
|
|
*/
|
|
extern const struct worktree *find_shared_symref(const char *symref,
|
|
const char *target);
|
|
|
|
/*
|
|
* Similar to head_ref() for all HEADs _except_ one from the current
|
|
* worktree, which is covered by head_ref().
|
|
*/
|
|
int other_head_refs(each_ref_fn fn, void *cb_data);
|
|
|
|
int is_worktree_being_rebased(const struct worktree *wt, const char *target);
|
|
int is_worktree_being_bisected(const struct worktree *wt, const char *target);
|
|
|
|
/*
|
|
* Similar to git_path() but can produce paths for a specified
|
|
* worktree instead of current one
|
|
*/
|
|
extern const char *worktree_git_path(const struct worktree *wt,
|
|
const char *fmt, ...)
|
|
__attribute__((format (printf, 2, 3)));
|
|
|
|
/*
|
|
* Parse a worktree ref (i.e. with prefix main-worktree/ or
|
|
* worktrees/) and return the position of the worktree's name and
|
|
* length (or NULL and zero if it's main worktree), and ref.
|
|
*
|
|
* All name, name_length and ref arguments could be NULL.
|
|
*/
|
|
int parse_worktree_ref(const char *worktree_ref, const char **name,
|
|
int *name_length, const char **ref);
|
|
#endif
|