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git/cache.h

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#ifndef CACHE_H
#define CACHE_H
#include "git-compat-util.h"
#include "strbuf.h"
#include "hashmap.h"
#include "list.h"
#include "advice.h"
#include "gettext.h"
#include "convert.h"
#include "trace.h"
#include "trace2.h"
#include "string-list.h"
#include "pack-revindex.h"
#include "hash.h"
#include "path.h"
#include "pathspec.h"
#include "object.h"
#include "oid-array.h"
#include "repository.h"
#include "statinfo.h"
#include "mem-pool.h"
typedef struct git_zstream {
z_stream z;
unsigned long avail_in;
unsigned long avail_out;
unsigned long total_in;
unsigned long total_out;
unsigned char *next_in;
unsigned char *next_out;
} git_zstream;
void git_inflate_init(git_zstream *);
void git_inflate_init_gzip_only(git_zstream *);
void git_inflate_end(git_zstream *);
int git_inflate(git_zstream *, int flush);
void git_deflate_init(git_zstream *, int level);
void git_deflate_init_gzip(git_zstream *, int level);
void git_deflate_init_raw(git_zstream *, int level);
void git_deflate_end(git_zstream *);
int git_deflate_abort(git_zstream *);
int git_deflate_end_gently(git_zstream *);
int git_deflate(git_zstream *, int flush);
unsigned long git_deflate_bound(git_zstream *, unsigned long);
#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
#define DTYPE(de) ((de)->d_type)
#else
#undef DT_UNKNOWN
#undef DT_DIR
#undef DT_REG
#undef DT_LNK
#define DT_UNKNOWN 0
#define DT_DIR 1
#define DT_REG 2
#define DT_LNK 3
#define DTYPE(de) DT_UNKNOWN
#endif
/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
#define S_IFINVALID 0030000
/*
* A "directory link" is a link to another git directory.
*
* The value 0160000 is not normally a valid mode, and
* also just happens to be S_IFDIR + S_IFLNK
*/
#define S_IFGITLINK 0160000
#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
/*
* Some mode bits are also used internally for computations.
*
* They *must* not overlap with any valid modes, and they *must* not be emitted
* to outside world - i.e. appear on disk or network. In other words, it's just
* temporary fields, which we internally use, but they have to stay in-house.
*
* ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
* codebase mode is `unsigned int` which is assumed to be at least 32 bits )
*/
/* used internally in tree-diff */
#define S_DIFFTREE_IFXMIN_NEQ 0x80000000
/*
* Intensive research over the course of many years has shown that
* port 9418 is totally unused by anything else. Or
*
* Your search - "port 9418" - did not match any documents.
*
* as www.google.com puts it.
*
* This port has been properly assigned for git use by IANA:
* git (Assigned-9418) [I06-050728-0001].
*
* git 9418/tcp git pack transfer service
* git 9418/udp git pack transfer service
*
* with Linus Torvalds <torvalds@osdl.org> as the point of
* contact. September 2005.
*
* See http://www.iana.org/assignments/port-numbers
*/
#define DEFAULT_GIT_PORT 9418
/*
* Basic data structures for the directory cache
*/
#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
struct cache_header {
uint32_t hdr_signature;
uint32_t hdr_version;
uint32_t hdr_entries;
};
#define INDEX_FORMAT_LB 2
#define INDEX_FORMAT_UB 4
struct cache_entry {
struct hashmap_entry ent;
struct stat_data ce_stat_data;
unsigned int ce_mode;
unsigned int ce_flags;
unsigned int mem_pool_allocated;
unsigned int ce_namelen;
unsigned int index; /* for link extension */
struct object_id oid;
char name[FLEX_ARRAY]; /* more */
};
#define CE_STAGEMASK (0x3000)
#define CE_EXTENDED (0x4000)
#define CE_VALID (0x8000)
#define CE_STAGESHIFT 12
/*
* Range 0xFFFF0FFF in ce_flags is divided into
* two parts: in-memory flags and on-disk ones.
* Flags in CE_EXTENDED_FLAGS will get saved on-disk
* if you want to save a new flag, add it in
* CE_EXTENDED_FLAGS
*
* In-memory only flags
*/
#define CE_UPDATE (1 << 16)
#define CE_REMOVE (1 << 17)
#define CE_UPTODATE (1 << 18)
#define CE_ADDED (1 << 19)
#define CE_HASHED (1 << 20)
#define CE_FSMONITOR_VALID (1 << 21)
#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
#define CE_CONFLICTED (1 << 23)
#define CE_UNPACKED (1 << 24)
#define CE_NEW_SKIP_WORKTREE (1 << 25)
/* used to temporarily mark paths matched by pathspecs */
#define CE_MATCHED (1 << 26)
#define CE_UPDATE_IN_BASE (1 << 27)
#define CE_STRIP_NAME (1 << 28)
/*
* Extended on-disk flags
*/
#define CE_INTENT_TO_ADD (1 << 29)
#define CE_SKIP_WORKTREE (1 << 30)
/* CE_EXTENDED2 is for future extension */
#define CE_EXTENDED2 (1U << 31)
#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
/*
* Safeguard to avoid saving wrong flags:
* - CE_EXTENDED2 won't get saved until its semantic is known
* - Bits in 0x0000FFFF have been saved in ce_flags already
* - Bits in 0x003F0000 are currently in-memory flags
*/
#if CE_EXTENDED_FLAGS & 0x803FFFFF
#error "CE_EXTENDED_FLAGS out of range"
#endif
#define S_ISSPARSEDIR(m) ((m) == S_IFDIR)
/* Forward structure decls */
struct pathspec;
struct child_process;
struct tree;
/*
* Copy the sha1 and stat state of a cache entry from one to
* another. But we never change the name, or the hash state!
*/
static inline void copy_cache_entry(struct cache_entry *dst,
const struct cache_entry *src)
{
unsigned int state = dst->ce_flags & CE_HASHED;
int mem_pool_allocated = dst->mem_pool_allocated;
/* Don't copy hash chain and name */
memcpy(&dst->ce_stat_data, &src->ce_stat_data,
offsetof(struct cache_entry, name) -
offsetof(struct cache_entry, ce_stat_data));
/* Restore the hash state */
dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
/* Restore the mem_pool_allocated flag */
dst->mem_pool_allocated = mem_pool_allocated;
}
static inline unsigned create_ce_flags(unsigned stage)
{
return (stage << CE_STAGESHIFT);
}
#define ce_namelen(ce) ((ce)->ce_namelen)
#define ce_size(ce) cache_entry_size(ce_namelen(ce))
#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD)
#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
static inline unsigned int create_ce_mode(unsigned int mode)
{
if (S_ISLNK(mode))
return S_IFLNK;
if (S_ISSPARSEDIR(mode))
return S_IFDIR;
if (S_ISDIR(mode) || S_ISGITLINK(mode))
return S_IFGITLINK;
return S_IFREG | ce_permissions(mode);
}
static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
unsigned int mode)
{
extern int trust_executable_bit, has_symlinks;
if (!has_symlinks && S_ISREG(mode) &&
ce && S_ISLNK(ce->ce_mode))
return ce->ce_mode;
if (!trust_executable_bit && S_ISREG(mode)) {
if (ce && S_ISREG(ce->ce_mode))
return ce->ce_mode;
return create_ce_mode(0666);
}
return create_ce_mode(mode);
}
static inline int ce_to_dtype(const struct cache_entry *ce)
{
unsigned ce_mode = ntohl(ce->ce_mode);
if (S_ISREG(ce_mode))
return DT_REG;
else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
return DT_DIR;
else if (S_ISLNK(ce_mode))
return DT_LNK;
else
return DT_UNKNOWN;
}
static inline unsigned int canon_mode(unsigned int mode)
{
if (S_ISREG(mode))
return S_IFREG | ce_permissions(mode);
if (S_ISLNK(mode))
return S_IFLNK;
if (S_ISDIR(mode))
return S_IFDIR;
return S_IFGITLINK;
}
static inline int ce_path_match(struct index_state *istate,
const struct cache_entry *ce,
const struct pathspec *pathspec,
char *seen)
{
return match_pathspec(istate, pathspec, ce->name, ce_namelen(ce), 0, seen,
S_ISDIR(ce->ce_mode) || S_ISGITLINK(ce->ce_mode));
}
#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
#define CE_ENTRY_CHANGED (1 << 1)
#define CE_ENTRY_REMOVED (1 << 2)
#define CE_ENTRY_ADDED (1 << 3)
#define RESOLVE_UNDO_CHANGED (1 << 4)
#define CACHE_TREE_CHANGED (1 << 5)
#define SPLIT_INDEX_ORDERED (1 << 6)
#define UNTRACKED_CHANGED (1 << 7)
#define FSMONITOR_CHANGED (1 << 8)
struct split_index;
struct untracked_cache;
struct progress;
struct pattern_list;
enum sparse_index_mode {
/*
* There are no sparse directories in the index at all.
*
* Repositories that don't use cone-mode sparse-checkout will
* always have their indexes in this mode.
*/
INDEX_EXPANDED = 0,
/*
* The index has already been collapsed to sparse directories
* whereever possible.
*/
INDEX_COLLAPSED,
/*
* The sparse directories that exist are outside the
* sparse-checkout boundary, but it is possible that some file
* entries could collapse to sparse directory entries.
*/
INDEX_PARTIALLY_SPARSE,
};
struct index_state {
struct cache_entry **cache;
unsigned int version;
unsigned int cache_nr, cache_alloc, cache_changed;
struct string_list *resolve_undo;
struct cache_tree *cache_tree;
struct split_index *split_index;
struct cache_time timestamp;
unsigned name_hash_initialized : 1,
initialized : 1,
drop_cache_tree : 1,
updated_workdir : 1,
updated_skipworktree : 1,
fsmonitor_has_run_once : 1;
enum sparse_index_mode sparse_index;
struct hashmap name_hash;
struct hashmap dir_hash;
struct object_id oid;
struct untracked_cache *untracked;
char *fsmonitor_last_update;
struct ewah_bitmap *fsmonitor_dirty;
struct mem_pool *ce_mem_pool;
struct progress *progress;
struct repository *repo;
struct pattern_list *sparse_checkout_patterns;
};
/**
* A "struct index_state istate" must be initialized with
* INDEX_STATE_INIT or the corresponding index_state_init().
*
* If the variable won't be used again, use release_index() to free()
* its resources. If it needs to be used again use discard_index(),
* which does the same thing, but will use use index_state_init() at
* the end. The discard_index() will use its own "istate->repo" as the
* "r" argument to index_state_init() in that case.
*/
#define INDEX_STATE_INIT(r) { \
.repo = (r), \
}
void index_state_init(struct index_state *istate, struct repository *r);
void release_index(struct index_state *istate);
/* Name hashing */
int test_lazy_init_name_hash(struct index_state *istate, int try_threaded);
void add_name_hash(struct index_state *istate, struct cache_entry *ce);
void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
void free_name_hash(struct index_state *istate);
/* Cache entry creation and cleanup */
/*
* Create cache_entry intended for use in the specified index. Caller
* is responsible for discarding the cache_entry with
* `discard_cache_entry`.
*/
struct cache_entry *make_cache_entry(struct index_state *istate,
unsigned int mode,
const struct object_id *oid,
const char *path,
int stage,
unsigned int refresh_options);
struct cache_entry *make_empty_cache_entry(struct index_state *istate,
size_t name_len);
/*
* Create a cache_entry that is not intended to be added to an index. If
* `ce_mem_pool` is not NULL, the entry is allocated within the given memory
* pool. Caller is responsible for discarding "loose" entries with
* `discard_cache_entry()` and the memory pool with
* `mem_pool_discard(ce_mem_pool, should_validate_cache_entries())`.
*/
struct cache_entry *make_transient_cache_entry(unsigned int mode,
const struct object_id *oid,
const char *path,
int stage,
struct mem_pool *ce_mem_pool);
struct cache_entry *make_empty_transient_cache_entry(size_t len,
struct mem_pool *ce_mem_pool);
/*
* Discard cache entry.
*/
void discard_cache_entry(struct cache_entry *ce);
/*
* Check configuration if we should perform extra validation on cache
* entries.
*/
int should_validate_cache_entries(void);
/*
* Duplicate a cache_entry. Allocate memory for the new entry from a
* memory_pool. Takes into account cache_entry fields that are meant
* for managing the underlying memory allocation of the cache_entry.
*/
struct cache_entry *dup_cache_entry(const struct cache_entry *ce, struct index_state *istate);
/*
* Validate the cache entries in the index. This is an internal
* consistency check that the cache_entry structs are allocated from
* the expected memory pool.
*/
void validate_cache_entries(const struct index_state *istate);
/*
* Bulk prefetch all missing cache entries that are not GITLINKs and that match
* the given predicate. This function should only be called if
* repo_has_promisor_remote() returns true.
*/
typedef int (*must_prefetch_predicate)(const struct cache_entry *);
void prefetch_cache_entries(const struct index_state *istate,
must_prefetch_predicate must_prefetch);
#ifdef USE_THE_INDEX_VARIABLE
extern struct index_state the_index;
#endif
static inline enum object_type object_type(unsigned int mode)
{
return S_ISDIR(mode) ? OBJ_TREE :
S_ISGITLINK(mode) ? OBJ_COMMIT :
OBJ_BLOB;
}
#define INIT_DB_QUIET 0x0001
#define INIT_DB_EXIST_OK 0x0002
int init_db(const char *git_dir, const char *real_git_dir,
const char *template_dir, int hash_algo,
const char *initial_branch, unsigned int flags);
void initialize_repository_version(int hash_algo, int reinit);
/* Initialize and use the cache information */
struct lock_file;
void preload_index(struct index_state *index,
const struct pathspec *pathspec,
unsigned int refresh_flags);
int do_read_index(struct index_state *istate, const char *path,
int must_exist); /* for testting only! */
int read_index_from(struct index_state *, const char *path,
const char *gitdir);
int is_index_unborn(struct index_state *);
void ensure_full_index(struct index_state *istate);
/* For use with `write_locked_index()`. */
#define COMMIT_LOCK (1 << 0)
#define SKIP_IF_UNCHANGED (1 << 1)
/*
* Write the index while holding an already-taken lock. Close the lock,
* and if `COMMIT_LOCK` is given, commit it.
*
* Unless a split index is in use, write the index into the lockfile.
*
* With a split index, write the shared index to a temporary file,
* adjust its permissions and rename it into place, then write the
* split index to the lockfile. If the temporary file for the shared
* index cannot be created, fall back to the behavior described in
* the previous paragraph.
*
* With `COMMIT_LOCK`, the lock is always committed or rolled back.
* Without it, the lock is closed, but neither committed nor rolled
* back.
*
* If `SKIP_IF_UNCHANGED` is given and the index is unchanged, nothing
* is written (and the lock is rolled back if `COMMIT_LOCK` is given).
*/
int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
void discard_index(struct index_state *);
void move_index_extensions(struct index_state *dst, struct index_state *src);
int unmerged_index(const struct index_state *);
/**
* Returns 1 if istate differs from tree, 0 otherwise. If tree is NULL,
* compares istate to HEAD. If tree is NULL and on an unborn branch,
* returns 1 if there are entries in istate, 0 otherwise. If an strbuf is
* provided, the space-separated list of files that differ will be appended
* to it.
*/
int repo_index_has_changes(struct repository *repo,
struct tree *tree,
struct strbuf *sb);
int verify_path(const char *path, unsigned mode);
int strcmp_offset(const char *s1, const char *s2, size_t *first_change);
int index_dir_exists(struct index_state *istate, const char *name, int namelen);
void adjust_dirname_case(struct index_state *istate, char *name);
struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
/*
* Searches for an entry defined by name and namelen in the given index.
* If the return value is positive (including 0) it is the position of an
* exact match. If the return value is negative, the negated value minus 1
* is the position where the entry would be inserted.
* Example: The current index consists of these files and its stages:
*
* b#0, d#0, f#1, f#3
*
* index_name_pos(&index, "a", 1) -> -1
* index_name_pos(&index, "b", 1) -> 0
* index_name_pos(&index, "c", 1) -> -2
* index_name_pos(&index, "d", 1) -> 1
* index_name_pos(&index, "e", 1) -> -3
* index_name_pos(&index, "f", 1) -> -3
* index_name_pos(&index, "g", 1) -> -5
*/
int index_name_pos(struct index_state *, const char *name, int namelen);
/*
* Like index_name_pos, returns the position of an entry of the given name in
* the index if one exists, otherwise returns a negative value where the negated
* value minus 1 is the position where the index entry would be inserted. Unlike
* index_name_pos, however, a sparse index is not expanded to find an entry
* inside a sparse directory.
*/
int index_name_pos_sparse(struct index_state *, const char *name, int namelen);
/*
* Determines whether an entry with the given name exists within the
* given index. The return value is 1 if an exact match is found, otherwise
* it is 0. Note that, unlike index_name_pos, this function does not expand
* the index if it is sparse. If an item exists within the full index but it
* is contained within a sparse directory (and not in the sparse index), 0 is
* returned.
*/
int index_entry_exists(struct index_state *, const char *name, int namelen);
/*
* Some functions return the negative complement of an insert position when a
* precise match was not found but a position was found where the entry would
* need to be inserted. This helper protects that logic from any integer
* underflow.
*/
static inline int index_pos_to_insert_pos(uintmax_t pos)
{
if (pos > INT_MAX)
die("overflow: -1 - %"PRIuMAX, pos);
return -1 - (int)pos;
}
#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
#define ADD_CACHE_JUST_APPEND 8 /* Append only */
#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
#define ADD_CACHE_RENORMALIZE 64 /* Pass along HASH_RENORMALIZE */
int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
/* Remove entry, return true if there are more entries to go. */
int remove_index_entry_at(struct index_state *, int pos);
void remove_marked_cache_entries(struct index_state *istate, int invalidate);
int remove_file_from_index(struct index_state *, const char *path);
#define ADD_CACHE_VERBOSE 1
#define ADD_CACHE_PRETEND 2
#define ADD_CACHE_IGNORE_ERRORS 4
#define ADD_CACHE_IGNORE_REMOVAL 8
#define ADD_CACHE_INTENT 16
/*
* These two are used to add the contents of the file at path
* to the index, marking the working tree up-to-date by storing
* the cached stat info in the resulting cache entry. A caller
* that has already run lstat(2) on the path can call
* add_to_index(), and all others can call add_file_to_index();
* the latter will do necessary lstat(2) internally before
* calling the former.
*/
int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
int add_file_to_index(struct index_state *, const char *path, int flags);
int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip);
int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
int index_name_is_other(struct index_state *, const char *, int);
void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *);
/* do stat comparison even if CE_VALID is true */
#define CE_MATCH_IGNORE_VALID 01
/* do not check the contents but report dirty on racily-clean entries */
#define CE_MATCH_RACY_IS_DIRTY 02
/* do stat comparison even if CE_SKIP_WORKTREE is true */
#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
/* ignore non-existent files during stat update */
#define CE_MATCH_IGNORE_MISSING 0x08
/* enable stat refresh */
#define CE_MATCH_REFRESH 0x10
/* don't refresh_fsmonitor state or do stat comparison even if CE_FSMONITOR_VALID is true */
#define CE_MATCH_IGNORE_FSMONITOR 0X20
int is_racy_timestamp(const struct index_state *istate,
const struct cache_entry *ce);
int has_racy_timestamp(struct index_state *istate);
int ie_match_stat(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
int ie_modified(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
#define HASH_WRITE_OBJECT 1
#define HASH_FORMAT_CHECK 2
#define HASH_RENORMALIZE 4
#define HASH_SILENT 8
int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags);
/*
* Record to sd the data from st that we use to check whether a file
* might have changed.
*/
void fill_stat_data(struct stat_data *sd, struct stat *st);
/*
* Return 0 if st is consistent with a file not having been changed
* since sd was filled. If there are differences, return a
* combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
* INODE_CHANGED, and DATA_CHANGED.
*/
int match_stat_data(const struct stat_data *sd, struct stat *st);
int match_stat_data_racy(const struct index_state *istate,
const struct stat_data *sd, struct stat *st);
void fill_stat_cache_info(struct index_state *istate, struct cache_entry *ce, struct stat *st);
#define REFRESH_REALLY (1 << 0) /* ignore_valid */
#define REFRESH_UNMERGED (1 << 1) /* allow unmerged */
#define REFRESH_QUIET (1 << 2) /* be quiet about it */
#define REFRESH_IGNORE_MISSING (1 << 3) /* ignore non-existent */
#define REFRESH_IGNORE_SUBMODULES (1 << 4) /* ignore submodules */
#define REFRESH_IN_PORCELAIN (1 << 5) /* user friendly output, not "needs update" */
#define REFRESH_PROGRESS (1 << 6) /* show progress bar if stderr is tty */
#define REFRESH_IGNORE_SKIP_WORKTREE (1 << 7) /* ignore skip_worktree entries */
int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
/*
* Refresh the index and write it to disk.
*
* 'refresh_flags' is passed directly to 'refresh_index()', while
* 'COMMIT_LOCK | write_flags' is passed to 'write_locked_index()', so
* the lockfile is always either committed or rolled back.
*
* If 'gentle' is passed, errors locking the index are ignored.
*
* Return 1 if refreshing the index returns an error, -1 if writing
* the index to disk fails, 0 on success.
*
* Note that if refreshing the index returns an error, we still write
* out the index (unless locking fails).
*/
int repo_refresh_and_write_index(struct repository*, unsigned int refresh_flags, unsigned int write_flags, int gentle, const struct pathspec *, char *seen, const char *header_msg);
struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int);
void set_alternate_index_output(const char *);
extern int verify_index_checksum;
extern int verify_ce_order;
extern int quote_path_fully;
#define MTIME_CHANGED 0x0001
#define CTIME_CHANGED 0x0002
#define OWNER_CHANGED 0x0004
#define MODE_CHANGED 0x0008
#define INODE_CHANGED 0x0010
#define DATA_CHANGED 0x0020
#define TYPE_CHANGED 0x0040
/*
* Return an abbreviated sha1 unique within this repository's object database.
* The result will be at least `len` characters long, and will be NUL
* terminated.
*
* The non-`_r` version returns a static buffer which remains valid until 4
* more calls to repo_find_unique_abbrev are made.
*
* The `_r` variant writes to a buffer supplied by the caller, which must be at
* least `GIT_MAX_HEXSZ + 1` bytes. The return value is the number of bytes
* written (excluding the NUL terminator).
*
* Note that while this version avoids the static buffer, it is not fully
* reentrant, as it calls into other non-reentrant git code.
*/
const char *repo_find_unique_abbrev(struct repository *r, const struct object_id *oid, int len);
int repo_find_unique_abbrev_r(struct repository *r, char *hex, const struct object_id *oid, int len);
/*
* Create the directory containing the named path, using care to be
* somewhat safe against races. Return one of the scld_error values to
* indicate success/failure. On error, set errno to describe the
* problem.
*
* SCLD_VANISHED indicates that one of the ancestor directories of the
* path existed at one point during the function call and then
* suddenly vanished, probably because another process pruned the
* directory while we were working. To be robust against this kind of
* race, callers might want to try invoking the function again when it
* returns SCLD_VANISHED.
*
* safe_create_leading_directories() temporarily changes path while it
* is working but restores it before returning.
* safe_create_leading_directories_const() doesn't modify path, even
* temporarily. Both these variants adjust the permissions of the
* created directories to honor core.sharedRepository, so they are best
* suited for files inside the git dir. For working tree files, use
* safe_create_leading_directories_no_share() instead, as it ignores
* the core.sharedRepository setting.
*/
enum scld_error {
SCLD_OK = 0,
SCLD_FAILED = -1,
SCLD_PERMS = -2,
SCLD_EXISTS = -3,
SCLD_VANISHED = -4
};
enum scld_error safe_create_leading_directories(char *path);
enum scld_error safe_create_leading_directories_const(const char *path);
enum scld_error safe_create_leading_directories_no_share(char *path);
int mkdir_in_gitdir(const char *path);
int git_open_cloexec(const char *name, int flags);
#define git_open(name) git_open_cloexec(name, O_RDONLY)
/**
* unpack_loose_header() initializes the data stream needed to unpack
* a loose object header.
*
* Returns:
*
* - ULHR_OK on success
* - ULHR_BAD on error
* - ULHR_TOO_LONG if the header was too long
*
* It will only parse up to MAX_HEADER_LEN bytes unless an optional
* "hdrbuf" argument is non-NULL. This is intended for use with
* OBJECT_INFO_ALLOW_UNKNOWN_TYPE to extract the bad type for (error)
* reporting. The full header will be extracted to "hdrbuf" for use
* with parse_loose_header(), ULHR_TOO_LONG will still be returned
* from this function to indicate that the header was too long.
*/
enum unpack_loose_header_result {
ULHR_OK,
ULHR_BAD,
ULHR_TOO_LONG,
};
enum unpack_loose_header_result unpack_loose_header(git_zstream *stream,
unsigned char *map,
unsigned long mapsize,
void *buffer,
unsigned long bufsiz,
struct strbuf *hdrbuf);
/**
* parse_loose_header() parses the starting "<type> <len>\0" of an
* object. If it doesn't follow that format -1 is returned. To check
* the validity of the <type> populate the "typep" in the "struct
* object_info". It will be OBJ_BAD if the object type is unknown. The
* parsed <len> can be retrieved via "oi->sizep", and from there
* passed to unpack_loose_rest().
*/
struct object_info;
int parse_loose_header(const char *hdr, struct object_info *oi);
/**
* With in-core object data in "buf", rehash it to make sure the
* object name actually matches "oid" to detect object corruption.
*
* A negative value indicates an error, usually that the OID is not
* what we expected, but it might also indicate another error.
*/
int check_object_signature(struct repository *r, const struct object_id *oid,
void *map, unsigned long size,
enum object_type type);
/**
* A streaming version of check_object_signature().
* Try reading the object named with "oid" using
* the streaming interface and rehash it to do the same.
*/
int stream_object_signature(struct repository *r, const struct object_id *oid);
int finalize_object_file(const char *tmpfile, const char *filename);
/* Helper to check and "touch" a file */
int check_and_freshen_file(const char *fn, int freshen);
/* Convert to/from hex/sha1 representation */
#define MINIMUM_ABBREV minimum_abbrev
#define DEFAULT_ABBREV default_abbrev
/* used when the code does not know or care what the default abbrev is */
#define FALLBACK_DEFAULT_ABBREV 7
struct object_context {
unsigned short mode;
/*
* symlink_path is only used by get_tree_entry_follow_symlinks,
* and only for symlinks that point outside the repository.
*/
struct strbuf symlink_path;
/*
* If GET_OID_RECORD_PATH is set, this will record path (if any)
* found when resolving the name. The caller is responsible for
* releasing the memory.
*/
char *path;
};
int repo_get_oid(struct repository *r, const char *str, struct object_id *oid);
__attribute__((format (printf, 2, 3)))
int get_oidf(struct object_id *oid, const char *fmt, ...);
int repo_get_oid_commit(struct repository *r, const char *str, struct object_id *oid);
int repo_get_oid_committish(struct repository *r, const char *str, struct object_id *oid);
int repo_get_oid_tree(struct repository *r, const char *str, struct object_id *oid);
int repo_get_oid_treeish(struct repository *r, const char *str, struct object_id *oid);
int repo_get_oid_blob(struct repository *r, const char *str, struct object_id *oid);
int repo_get_oid_mb(struct repository *r, const char *str, struct object_id *oid);
void maybe_die_on_misspelt_object_name(struct repository *repo,
const char *name,
const char *prefix);
enum get_oid_result get_oid_with_context(struct repository *repo, const char *str,
unsigned flags, struct object_id *oid,
struct object_context *oc);
typedef int each_abbrev_fn(const struct object_id *oid, void *);
int repo_for_each_abbrev(struct repository *r, const char *prefix, each_abbrev_fn, void *);
int set_disambiguate_hint_config(const char *var, const char *value);
/*
* This reads short-hand syntax that not only evaluates to a commit
* object name, but also can act as if the end user spelled the name
* of the branch from the command line.
*
* - "@{-N}" finds the name of the Nth previous branch we were on, and
* places the name of the branch in the given buf and returns the
* number of characters parsed if successful.
*
* - "<branch>@{upstream}" finds the name of the other ref that
* <branch> is configured to merge with (missing <branch> defaults
* to the current branch), and places the name of the branch in the
* given buf and returns the number of characters parsed if
* successful.
*
* If the input is not of the accepted format, it returns a negative
* number to signal an error.
*
* If the input was ok but there are not N branch switches in the
* reflog, it returns 0.
*/
#define INTERPRET_BRANCH_LOCAL (1<<0)
#define INTERPRET_BRANCH_REMOTE (1<<1)
#define INTERPRET_BRANCH_HEAD (1<<2)
struct interpret_branch_name_options {
/*
* If "allowed" is non-zero, it is a treated as a bitfield of allowable
* expansions: local branches ("refs/heads/"), remote branches
* ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is
* allowed, even ones to refs outside of those namespaces.
*/
unsigned allowed;
/*
* If ^{upstream} or ^{push} (or equivalent) is requested, and the
* branch in question does not have such a reference, return -1 instead
* of die()-ing.
*/
unsigned nonfatal_dangling_mark : 1;
};
int repo_interpret_branch_name(struct repository *r,
const char *str, int len,
struct strbuf *buf,
const struct interpret_branch_name_options *options);
int base_name_compare(const char *name1, size_t len1, int mode1,
const char *name2, size_t len2, int mode2);
int df_name_compare(const char *name1, size_t len1, int mode1,
const char *name2, size_t len2, int mode2);
int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
void *read_object_with_reference(struct repository *r,
const struct object_id *oid,
enum object_type required_type,
unsigned long *size,
struct object_id *oid_ret);
struct object *repo_peel_to_type(struct repository *r,
const char *name, int namelen,
struct object *o, enum object_type);
const char *git_editor(void);
const char *git_sequence_editor(void);
const char *git_pager(int stdout_is_tty);
int is_terminal_dumb(void);
struct cache_def {
struct strbuf path;
int flags;
int track_flags;
int prefix_len_stat_func;
};
#define CACHE_DEF_INIT { \
.path = STRBUF_INIT, \
}
static inline void cache_def_clear(struct cache_def *cache)
{
strbuf_release(&cache->path);
}
int has_symlink_leading_path(const char *name, int len);
int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
int check_leading_path(const char *name, int len, int warn_on_lstat_err);
int has_dirs_only_path(const char *name, int len, int prefix_len);
void invalidate_lstat_cache(void);
void schedule_dir_for_removal(const char *name, int len);
void remove_scheduled_dirs(void);
struct pack_window {
struct pack_window *next;
unsigned char *base;
off_t offset;
size_t len;
unsigned int last_used;
unsigned int inuse_cnt;
};
struct pack_entry {
off_t offset;
struct packed_git *p;
};
/*
* Set this to 0 to prevent oid_object_info_extended() from fetching missing
* blobs. This has a difference only if extensions.partialClone is set.
*
* Its default value is 1.
*/
extern int fetch_if_missing;
/* Dumb servers support */
int update_server_info(int);
extern const char *git_mailmap_file;
extern const char *git_mailmap_blob;
#define COPY_READ_ERROR (-2)
#define COPY_WRITE_ERROR (-3)
int copy_fd(int ifd, int ofd);
int copy_file(const char *dst, const char *src, int mode);
int copy_file_with_time(const char *dst, const char *src, int mode);
/* pager.c */
void setup_pager(void);
int pager_in_use(void);
extern int pager_use_color;
int term_columns(void);
void term_clear_line(void);
int decimal_width(uintmax_t);
int check_pager_config(const char *cmd);
void prepare_pager_args(struct child_process *, const char *pager);
/* base85 */
int decode_85(char *dst, const char *line, int linelen);
void encode_85(char *buf, const unsigned char *data, int bytes);
/* pkt-line.c */
void packet_trace_identity(const char *prog);
/* add */
/*
* return 0 if success, 1 - if addition of a file failed and
* ADD_FILES_IGNORE_ERRORS was specified in flags
*/
int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
/* diff.c */
extern int diff_auto_refresh_index;
/* match-trees.c */
void shift_tree(struct repository *, const struct object_id *, const struct object_id *, struct object_id *, int);
void shift_tree_by(struct repository *, const struct object_id *, const struct object_id *, struct object_id *, const char *);
/*
* whitespace rules.
* used by both diff and apply
* last two digits are tab width
*/
#define WS_BLANK_AT_EOL 0100
#define WS_SPACE_BEFORE_TAB 0200
#define WS_INDENT_WITH_NON_TAB 0400
#define WS_CR_AT_EOL 01000
#define WS_BLANK_AT_EOF 02000
#define WS_TAB_IN_INDENT 04000
#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
#define WS_TAB_WIDTH_MASK 077
/* All WS_* -- when extended, adapt diff.c emit_symbol */
#define WS_RULE_MASK 07777
extern unsigned whitespace_rule_cfg;
unsigned whitespace_rule(struct index_state *, const char *);
unsigned parse_whitespace_rule(const char *);
unsigned ws_check(const char *line, int len, unsigned ws_rule);
void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
char *whitespace_error_string(unsigned ws);
void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
int ws_blank_line(const char *line, int len);
#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
/* ls-files */
void overlay_tree_on_index(struct index_state *istate,
const char *tree_name, const char *prefix);
/* merge.c */
struct commit_list;
int try_merge_command(struct repository *r,
const char *strategy, size_t xopts_nr,
const char **xopts, struct commit_list *common,
const char *head_arg, struct commit_list *remotes);
int checkout_fast_forward(struct repository *r,
const struct object_id *from,
const struct object_id *to,
int overwrite_ignore);
int sane_execvp(const char *file, char *const argv[]);
/*
* A struct to encapsulate the concept of whether a file has changed
* since we last checked it. This uses criteria similar to those used
* for the index.
*/
struct stat_validity {
struct stat_data *sd;
};
void stat_validity_clear(struct stat_validity *sv);
/*
* Returns 1 if the path is a regular file (or a symlink to a regular
* file) and matches the saved stat_validity, 0 otherwise. A missing
* or inaccessible file is considered a match if the struct was just
* initialized, or if the previous update found an inaccessible file.
*/
int stat_validity_check(struct stat_validity *sv, const char *path);
/*
* Update the stat_validity from a file opened at descriptor fd. If
* the file is missing, inaccessible, or not a regular file, then
* future calls to stat_validity_check will match iff one of those
* conditions continues to be true.
*/
void stat_validity_update(struct stat_validity *sv, int fd);
int versioncmp(const char *s1, const char *s2);
#endif /* CACHE_H */