/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include <stddef.h>
#include "common.h"
#include "repository.h"
#include "index.h"
#include "tree.h"
#include "tree-cache.h"
#include "hash.h"
#include "iterator.h"
#include "pathspec.h"
#include "ignore.h"
#include "blob.h"
#include "git2/odb.h"
#include "git2/oid.h"
#include "git2/blob.h"
#include "git2/config.h"
#include "git2/sys/index.h"
#define entry_size(type,len) ((offsetof(type, path) + (len) + 8) & ~7)
#define short_entry_size(len) entry_size(struct entry_short, len)
#define long_entry_size(len) entry_size(struct entry_long, len)
#define minimal_entry_size (offsetof(struct entry_short, path))
static const size_t INDEX_FOOTER_SIZE = GIT_OID_RAWSZ;
static const size_t INDEX_HEADER_SIZE = 12;
static const unsigned int INDEX_VERSION_NUMBER = 2;
static const unsigned int INDEX_VERSION_NUMBER_EXT = 3;
static const unsigned int INDEX_HEADER_SIG = 0x44495243;
static const char INDEX_EXT_TREECACHE_SIG[] = {'T', 'R', 'E', 'E'};
static const char INDEX_EXT_UNMERGED_SIG[] = {'R', 'E', 'U', 'C'};
static const char INDEX_EXT_CONFLICT_NAME_SIG[] = {'N', 'A', 'M', 'E'};
#define INDEX_OWNER(idx) ((git_repository *)(GIT_REFCOUNT_OWNER(idx)))
struct index_header {
uint32_t signature;
uint32_t version;
uint32_t entry_count;
};
struct index_extension {
char signature[4];
uint32_t extension_size;
};
struct entry_time {
uint32_t seconds;
uint32_t nanoseconds;
};
struct entry_short {
struct entry_time ctime;
struct entry_time mtime;
uint32_t dev;
uint32_t ino;
uint32_t mode;
uint32_t uid;
uint32_t gid;
uint32_t file_size;
git_oid oid;
uint16_t flags;
char path[1]; /* arbitrary length */
};
struct entry_long {
struct entry_time ctime;
struct entry_time mtime;
uint32_t dev;
uint32_t ino;
uint32_t mode;
uint32_t uid;
uint32_t gid;
uint32_t file_size;
git_oid oid;
uint16_t flags;
uint16_t flags_extended;
char path[1]; /* arbitrary length */
};
struct entry_srch_key {
const char *path;
int stage;
};
/* local declarations */
static size_t read_extension(git_index *index, const char *buffer, size_t buffer_size);
static size_t read_entry(git_index_entry *dest, const void *buffer, size_t buffer_size);
static int read_header(struct index_header *dest, const void *buffer);
static int parse_index(git_index *index, const char *buffer, size_t buffer_size);
static bool is_index_extended(git_index *index);
static int write_index(git_index *index, git_filebuf *file);
static void index_entry_free(git_index_entry *entry);
static void index_entry_reuc_free(git_index_reuc_entry *reuc);
static int index_srch(const void *key, const void *array_member)
{
const struct entry_srch_key *srch_key = key;
const git_index_entry *entry = array_member;
int ret;
ret = strcmp(srch_key->path, entry->path);
if (ret == 0 && srch_key->stage != GIT_INDEX_STAGE_ANY)
ret = srch_key->stage - GIT_IDXENTRY_STAGE(entry);
return ret;
}
static int index_isrch(const void *key, const void *array_member)
{
const struct entry_srch_key *srch_key = key;
const git_index_entry *entry = array_member;
int ret;
ret = strcasecmp(srch_key->path, entry->path);
if (ret == 0 && srch_key->stage != GIT_INDEX_STAGE_ANY)
ret = srch_key->stage - GIT_IDXENTRY_STAGE(entry);
return ret;
}
static int index_cmp_path(const void *a, const void *b)
{
return strcmp((const char *)a, (const char *)b);
}
static int index_icmp_path(const void *a, const void *b)
{
return strcasecmp((const char *)a, (const char *)b);
}
static int index_srch_path(const void *path, const void *array_member)
{
const git_index_entry *entry = array_member;
return strcmp((const char *)path, entry->path);
}
static int index_isrch_path(const void *path, const void *array_member)
{
const git_index_entry *entry = array_member;
return strcasecmp((const char *)path, entry->path);
}
static int index_cmp(const void *a, const void *b)
{
int diff;
const git_index_entry *entry_a = a;
const git_index_entry *entry_b = b;
diff = strcmp(entry_a->path, entry_b->path);
if (diff == 0)
diff = (GIT_IDXENTRY_STAGE(entry_a) - GIT_IDXENTRY_STAGE(entry_b));
return diff;
}
static int index_icmp(const void *a, const void *b)
{
int diff;
const git_index_entry *entry_a = a;
const git_index_entry *entry_b = b;
diff = strcasecmp(entry_a->path, entry_b->path);
if (diff == 0)
diff = (GIT_IDXENTRY_STAGE(entry_a) - GIT_IDXENTRY_STAGE(entry_b));
return diff;
}
static int conflict_name_cmp(const void *a, const void *b)
{
const git_index_name_entry *name_a = a;
const git_index_name_entry *name_b = b;
if (name_a->ancestor && !name_b->ancestor)
return 1;
if (!name_a->ancestor && name_b->ancestor)
return -1;
if (name_a->ancestor)
return strcmp(name_a->ancestor, name_b->ancestor);
if (!name_a->ours || !name_b->ours)
return 0;
return strcmp(name_a->ours, name_b->ours);
}
/**
* TODO: enable this when resolving case insensitive conflicts
*/
#if 0
static int conflict_name_icmp(const void *a, const void *b)
{
const git_index_name_entry *name_a = a;
const git_index_name_entry *name_b = b;
if (name_a->ancestor && !name_b->ancestor)
return 1;
if (!name_a->ancestor && name_b->ancestor)
return -1;
if (name_a->ancestor)
return strcasecmp(name_a->ancestor, name_b->ancestor);
if (!name_a->ours || !name_b->ours)
return 0;
return strcasecmp(name_a->ours, name_b->ours);
}
#endif
static int reuc_srch(const void *key, const void *array_member)
{
const git_index_reuc_entry *reuc = array_member;
return strcmp(key, reuc->path);
}
static int reuc_isrch(const void *key, const void *array_member)
{
const git_index_reuc_entry *reuc = array_member;
return strcasecmp(key, reuc->path);
}
static int reuc_cmp(const void *a, const void *b)
{
const git_index_reuc_entry *info_a = a;
const git_index_reuc_entry *info_b = b;
return strcmp(info_a->path, info_b->path);
}
static int reuc_icmp(const void *a, const void *b)
{
const git_index_reuc_entry *info_a = a;
const git_index_reuc_entry *info_b = b;
return strcasecmp(info_a->path, info_b->path);
}
static void index_entry_reuc_free(git_index_reuc_entry *reuc)
{
if (!reuc)
return;
git__free(reuc->path);
git__free(reuc);
}
static void index_entry_free(git_index_entry *entry)
{
if (!entry)
return;
git__free(entry->path);
git__free(entry);
}
static unsigned int index_create_mode(unsigned int mode)
{
if (S_ISLNK(mode))
return S_IFLNK;
if (S_ISDIR(mode) || (mode & S_IFMT) == (S_IFLNK | S_IFDIR))
return (S_IFLNK | S_IFDIR);
return S_IFREG | GIT_PERMS_CANONICAL(mode);
}
static unsigned int index_merge_mode(
git_index *index, git_index_entry *existing, unsigned int mode)
{
if (index->no_symlinks && S_ISREG(mode) &&
existing && S_ISLNK(existing->mode))
return existing->mode;
if (index->distrust_filemode && S_ISREG(mode))
return (existing && S_ISREG(existing->mode)) ?
existing->mode : index_create_mode(0666);
return index_create_mode(mode);
}
void git_index__set_ignore_case(git_index *index, bool ignore_case)
{
index->ignore_case = ignore_case;
index->entries_cmp_path = ignore_case ? index_icmp_path : index_cmp_path;
index->entries_search = ignore_case ? index_isrch : index_srch;
index->entries_search_path = ignore_case ? index_isrch_path : index_srch_path;
git_vector_set_cmp(&index->entries, ignore_case ? index_icmp : index_cmp);
git_vector_sort(&index->entries);
index->reuc_search = ignore_case ? reuc_isrch : reuc_srch;
git_vector_set_cmp(&index->reuc, ignore_case ? reuc_icmp : reuc_cmp);
git_vector_sort(&index->reuc);
}
int git_index_open(git_index **index_out, const char *index_path)
{
git_index *index;
assert(index_out);
index = git__calloc(1, sizeof(git_index));
GITERR_CHECK_ALLOC(index);
if (index_path != NULL) {
index->index_file_path = git__strdup(index_path);
GITERR_CHECK_ALLOC(index->index_file_path);
/* Check if index file is stored on disk already */
if (git_path_exists(index->index_file_path) == true)
index->on_disk = 1;
}
if (git_vector_init(&index->entries, 32, index_cmp) < 0 ||
git_vector_init(&index->names, 32, conflict_name_cmp) < 0 ||
git_vector_init(&index->reuc, 32, reuc_cmp) < 0)
return -1;
index->entries_cmp_path = index_cmp_path;
index->entries_search = index_srch;
index->entries_search_path = index_srch_path;
index->reuc_search = reuc_srch;
*index_out = index;
GIT_REFCOUNT_INC(index);
return (index_path != NULL) ? git_index_read(index) : 0;
}
int git_index_new(git_index **out)
{
return git_index_open(out, NULL);
}
static void index_free(git_index *index)
{
git_index_clear(index);
git_vector_free(&index->entries);
git_vector_free(&index->names);
git_vector_free(&index->reuc);
git__free(index->index_file_path);
git__memzero(index, sizeof(*index));
git__free(index);
}
void git_index_free(git_index *index)
{
if (index == NULL)
return;
GIT_REFCOUNT_DEC(index, index_free);
}
static void index_entries_free(git_vector *entries)
{
size_t i;
for (i = 0; i < entries->length; ++i)
index_entry_free(git__swap(entries->contents[i], NULL));
git_vector_clear(entries);
}
void git_index_clear(git_index *index)
{
assert(index);
index_entries_free(&index->entries);
git_index_reuc_clear(index);
git_index_name_clear(index);
git_futils_filestamp_set(&index->stamp, NULL);
git_tree_cache_free(index->tree);
index->tree = NULL;
}
static int create_index_error(int error, const char *msg)
{
giterr_set(GITERR_INDEX, msg);
return error;
}
int git_index_set_caps(git_index *index, int caps)
{
unsigned int old_ignore_case;
assert(index);
old_ignore_case = index->ignore_case;
if (caps == GIT_INDEXCAP_FROM_OWNER) {
git_repository *repo = INDEX_OWNER(index);
int val;
if (!repo)
return create_index_error(
-1, "Cannot access repository to set index caps");
if (!git_repository__cvar(&val, repo, GIT_CVAR_IGNORECASE))
index->ignore_case = (val != 0);
if (!git_repository__cvar(&val, repo, GIT_CVAR_FILEMODE))
index->distrust_filemode = (val == 0);
if (!git_repository__cvar(&val, repo, GIT_CVAR_SYMLINKS))
index->no_symlinks = (val == 0);
}
else {
index->ignore_case = ((caps & GIT_INDEXCAP_IGNORE_CASE) != 0);
index->distrust_filemode = ((caps & GIT_INDEXCAP_NO_FILEMODE) != 0);
index->no_symlinks = ((caps & GIT_INDEXCAP_NO_SYMLINKS) != 0);
}
if (old_ignore_case != index->ignore_case) {
git_index__set_ignore_case(index, (bool)index->ignore_case);
}
return 0;
}
unsigned int git_index_caps(const git_index *index)
{
return ((index->ignore_case ? GIT_INDEXCAP_IGNORE_CASE : 0) |
(index->distrust_filemode ? GIT_INDEXCAP_NO_FILEMODE : 0) |
(index->no_symlinks ? GIT_INDEXCAP_NO_SYMLINKS : 0));
}
int git_index_read(git_index *index)
{
int error = 0, updated;
git_buf buffer = GIT_BUF_INIT;
git_futils_filestamp stamp = {0};
if (!index->index_file_path)
return create_index_error(-1,
"Failed to read index: The index is in-memory only");
if (!index->on_disk || git_path_exists(index->index_file_path) == false) {
git_index_clear(index);
index->on_disk = 0;
return 0;
}
updated = git_futils_filestamp_check(&stamp, index->index_file_path);
if (updated <= 0)
return updated;
error = git_futils_readbuffer(&buffer, index->index_file_path);
if (error < 0)
return error;
git_index_clear(index);
error = parse_index(index, buffer.ptr, buffer.size);
if (!error)
git_futils_filestamp_set(&index->stamp, &stamp);
git_buf_free(&buffer);
return error;
}
int git_index_write(git_index *index)
{
git_filebuf file = GIT_FILEBUF_INIT;
int error;
if (!index->index_file_path)
return create_index_error(-1,
"Failed to read index: The index is in-memory only");
git_vector_sort(&index->entries);
git_vector_sort(&index->reuc);
if ((error = git_filebuf_open(
&file, index->index_file_path, GIT_FILEBUF_HASH_CONTENTS)) < 0) {
if (error == GIT_ELOCKED)
giterr_set(GITERR_INDEX, "The index is locked. This might be due to a concurrrent or crashed process");
return error;
}
if ((error = write_index(index, &file)) < 0) {
git_filebuf_cleanup(&file);
return error;
}
if ((error = git_filebuf_commit(&file, GIT_INDEX_FILE_MODE)) < 0)
return error;
error = git_futils_filestamp_check(&index->stamp, index->index_file_path);
if (error < 0)
return error;
index->on_disk = 1;
return 0;
}
const char * git_index_path(git_index *index)
{
assert(index);
return index->index_file_path;
}
int git_index_write_tree(git_oid *oid, git_index *index)
{
git_repository *repo;
assert(oid && index);
repo = INDEX_OWNER(index);
if (repo == NULL)
return create_index_error(-1, "Failed to write tree. "
"The index file is not backed up by an existing repository");
return git_tree__write_index(oid, index, repo);
}
int git_index_write_tree_to(git_oid *oid, git_index *index, git_repository *repo)
{
assert(oid && index && repo);
return git_tree__write_index(oid, index, repo);
}
size_t git_index_entrycount(const git_index *index)
{
assert(index);
return index->entries.length;
}
const git_index_entry *git_index_get_byindex(
git_index *index, size_t n)
{
assert(index);
git_vector_sort(&index->entries);
return git_vector_get(&index->entries, n);
}
const git_index_entry *git_index_get_bypath(
git_index *index, const char *path, int stage)
{
size_t pos;
assert(index);
git_vector_sort(&index->entries);
if (git_index__find(&pos, index, path, stage) < 0) {
giterr_set(GITERR_INDEX, "Index does not contain %s", path);
return NULL;
}
return git_index_get_byindex(index, pos);
}
void git_index_entry__init_from_stat(git_index_entry *entry, struct stat *st)
{
entry->ctime.seconds = (git_time_t)st->st_ctime;
entry->mtime.seconds = (git_time_t)st->st_mtime;
/* entry->mtime.nanoseconds = st->st_mtimensec; */
/* entry->ctime.nanoseconds = st->st_ctimensec; */
entry->dev = st->st_rdev;
entry->ino = st->st_ino;
entry->mode = index_create_mode(st->st_mode);
entry->uid = st->st_uid;
entry->gid = st->st_gid;
entry->file_size = st->st_size;
}
int git_index_entry__cmp(const void *a, const void *b)
{
const git_index_entry *entry_a = a;
const git_index_entry *entry_b = b;
return strcmp(entry_a->path, entry_b->path);
}
int git_index_entry__cmp_icase(const void *a, const void *b)
{
const git_index_entry *entry_a = a;
const git_index_entry *entry_b = b;
return strcasecmp(entry_a->path, entry_b->path);
}
static int index_entry_init(
git_index_entry **entry_out, git_index *index, const char *rel_path)
{
int error = 0;
git_index_entry *entry = NULL;
struct stat st;
git_oid oid;
if (INDEX_OWNER(index) == NULL)
return create_index_error(-1,
"Could not initialize index entry. "
"Index is not backed up by an existing repository.");
/* write the blob to disk and get the oid and stat info */
error = git_blob__create_from_paths(
&oid, &st, INDEX_OWNER(index), NULL, rel_path, 0, true);
if (error < 0)
return error;
entry = git__calloc(1, sizeof(git_index_entry));
GITERR_CHECK_ALLOC(entry);
git_index_entry__init_from_stat(entry, &st);
entry->oid = oid;
entry->path = git__strdup(rel_path);
GITERR_CHECK_ALLOC(entry->path);
*entry_out = entry;
return 0;
}
static int index_entry_reuc_init(git_index_reuc_entry **reuc_out,
const char *path,
int ancestor_mode, const git_oid *ancestor_oid,
int our_mode, const git_oid *our_oid,
int their_mode, const git_oid *their_oid)
{
git_index_reuc_entry *reuc = NULL;
assert(reuc_out && path);
*reuc_out = NULL;
reuc = git__calloc(1, sizeof(git_index_reuc_entry));
GITERR_CHECK_ALLOC(reuc);
reuc->path = git__strdup(path);
if (reuc->path == NULL)
return -1;
if ((reuc->mode[0] = ancestor_mode) > 0)
git_oid_cpy(&reuc->oid[0], ancestor_oid);
if ((reuc->mode[1] = our_mode) > 0)
git_oid_cpy(&reuc->oid[1], our_oid);
if ((reuc->mode[2] = their_mode) > 0)
git_oid_cpy(&reuc->oid[2], their_oid);
*reuc_out = reuc;
return 0;
}
static git_index_entry *index_entry_dup(const git_index_entry *source_entry)
{
git_index_entry *entry;
entry = git__malloc(sizeof(git_index_entry));
if (!entry)
return NULL;
memcpy(entry, source_entry, sizeof(git_index_entry));
/* duplicate the path string so we own it */
entry->path = git__strdup(entry->path);
if (!entry->path)
return NULL;
return entry;
}
static int index_insert(git_index *index, git_index_entry *entry, int replace)
{
size_t path_length, position;
git_index_entry **existing = NULL;
assert(index && entry && entry->path != NULL);
/* make sure that the path length flag is correct */
path_length = strlen(entry->path);
entry->flags &= ~GIT_IDXENTRY_NAMEMASK;
if (path_length < GIT_IDXENTRY_NAMEMASK)
entry->flags |= path_length & GIT_IDXENTRY_NAMEMASK;
else
entry->flags |= GIT_IDXENTRY_NAMEMASK;
/* look if an entry with this path already exists */
if (!git_index__find(
&position, index, entry->path, GIT_IDXENTRY_STAGE(entry))) {
existing = (git_index_entry **)&index->entries.contents[position];
/* update filemode to existing values if stat is not trusted */
entry->mode = index_merge_mode(index, *existing, entry->mode);
}
/* if replacing is not requested or no existing entry exists, just
* insert entry at the end; the index is no longer sorted
*/
if (!replace || !existing)
return git_vector_insert(&index->entries, entry);
/* exists, replace it (preserving name from existing entry) */
git__free(entry->path);
entry->path = (*existing)->path;
git__free(*existing);
*existing = entry;
return 0;
}
static int index_conflict_to_reuc(git_index *index, const char *path)
{
const git_index_entry *conflict_entries[3];
int ancestor_mode, our_mode, their_mode;
git_oid const *ancestor_oid, *our_oid, *their_oid;
int ret;
if ((ret = git_index_conflict_get(&conflict_entries[0],
&conflict_entries[1], &conflict_entries[2], index, path)) < 0)
return ret;
ancestor_mode = conflict_entries[0] == NULL ? 0 : conflict_entries[0]->mode;
our_mode = conflict_entries[1] == NULL ? 0 : conflict_entries[1]->mode;
their_mode = conflict_entries[2] == NULL ? 0 : conflict_entries[2]->mode;
ancestor_oid = conflict_entries[0] == NULL ? NULL : &conflict_entries[0]->oid;
our_oid = conflict_entries[1] == NULL ? NULL : &conflict_entries[1]->oid;
their_oid = conflict_entries[2] == NULL ? NULL : &conflict_entries[2]->oid;
if ((ret = git_index_reuc_add(index, path, ancestor_mode, ancestor_oid,
our_mode, our_oid, their_mode, their_oid)) >= 0)
ret = git_index_conflict_remove(index, path);
return ret;
}
int git_index_add_bypath(git_index *index, const char *path)
{
git_index_entry *entry = NULL;
int ret;
assert(index && path);
if ((ret = index_entry_init(&entry, index, path)) < 0 ||
(ret = index_insert(index, entry, 1)) < 0)
goto on_error;
/* Adding implies conflict was resolved, move conflict entries to REUC */
if ((ret = index_conflict_to_reuc(index, path)) < 0 && ret != GIT_ENOTFOUND)
goto on_error;
git_tree_cache_invalidate_path(index->tree, entry->path);
return 0;
on_error:
index_entry_free(entry);
return ret;
}
int git_index_remove_bypath(git_index *index, const char *path)
{
int ret;
assert(index && path);
if (((ret = git_index_remove(index, path, 0)) < 0 &&
ret != GIT_ENOTFOUND) ||
((ret = index_conflict_to_reuc(index, path)) < 0 &&
ret != GIT_ENOTFOUND))
return ret;
return 0;
}
int git_index_add(git_index *index, const git_index_entry *source_entry)
{
git_index_entry *entry = NULL;
int ret;
entry = index_entry_dup(source_entry);
if (entry == NULL)
return -1;
if ((ret = index_insert(index, entry, 1)) < 0) {
index_entry_free(entry);
return ret;
}
git_tree_cache_invalidate_path(index->tree, entry->path);
return 0;
}
int git_index_remove(git_index *index, const char *path, int stage)
{
size_t position;
int error;
git_index_entry *entry;
git_vector_sort(&index->entries);
if (git_index__find(&position, index, path, stage) < 0) {
giterr_set(GITERR_INDEX, "Index does not contain %s at stage %d",
path, stage);
return GIT_ENOTFOUND;
}
entry = git_vector_get(&index->entries, position);
if (entry != NULL)
git_tree_cache_invalidate_path(index->tree, entry->path);
error = git_vector_remove(&index->entries, position);
if (!error)
index_entry_free(entry);
return error;
}
int git_index_remove_directory(git_index *index, const char *dir, int stage)
{
git_buf pfx = GIT_BUF_INIT;
int error = 0;
size_t pos;
git_index_entry *entry;
if (git_buf_sets(&pfx, dir) < 0 || git_path_to_dir(&pfx) < 0)
return -1;
git_vector_sort(&index->entries);
pos = git_index__prefix_position(index, pfx.ptr);
while (1) {
entry = git_vector_get(&index->entries, pos);
if (!entry || git__prefixcmp(entry->path, pfx.ptr) != 0)
break;
if (GIT_IDXENTRY_STAGE(entry) != stage) {
++pos;
continue;
}
git_tree_cache_invalidate_path(index->tree, entry->path);
if ((error = git_vector_remove(&index->entries, pos)) < 0)
break;
index_entry_free(entry);
/* removed entry at 'pos' so we don't need to increment it */
}
git_buf_free(&pfx);
return error;
}
int git_index__find(
size_t *at_pos, git_index *index, const char *path, int stage)
{
struct entry_srch_key srch_key;
assert(path);
srch_key.path = path;
srch_key.stage = stage;
return git_vector_bsearch2(
at_pos, &index->entries, index->entries_search, &srch_key);
}
int git_index_find(size_t *at_pos, git_index *index, const char *path)
{
size_t pos;
assert(index && path);
if (git_vector_bsearch2(&pos, &index->entries, index->entries_search_path, path) < 0) {
giterr_set(GITERR_INDEX, "Index does not contain %s", path);
return GIT_ENOTFOUND;
}
/* Since our binary search only looked at path, we may be in the
* middle of a list of stages.
*/
while (pos > 0) {
const git_index_entry *prev = git_vector_get(&index->entries, pos-1);
if (index->entries_cmp_path(prev->path, path) != 0)
break;
--pos;
}
if (at_pos)
*at_pos = pos;
return 0;
}
size_t git_index__prefix_position(git_index *index, const char *path)
{
struct entry_srch_key srch_key;
size_t pos;
srch_key.path = path;
srch_key.stage = 0;
git_vector_sort(&index->entries);
git_vector_bsearch2(
&pos, &index->entries, index->entries_search, &srch_key);
return pos;
}
int git_index_conflict_add(git_index *index,
const git_index_entry *ancestor_entry,
const git_index_entry *our_entry,
const git_index_entry *their_entry)
{
git_index_entry *entries[3] = { 0 };
unsigned short i;
int ret = 0;
assert (index);
if ((ancestor_entry != NULL && (entries[0] = index_entry_dup(ancestor_entry)) == NULL) ||
(our_entry != NULL && (entries[1] = index_entry_dup(our_entry)) == NULL) ||
(their_entry != NULL && (entries[2] = index_entry_dup(their_entry)) == NULL))
return -1;
for (i = 0; i < 3; i++) {
if (entries[i] == NULL)
continue;
/* Make sure stage is correct */
entries[i]->flags = (entries[i]->flags & ~GIT_IDXENTRY_STAGEMASK) |
((i+1) << GIT_IDXENTRY_STAGESHIFT);
if ((ret = index_insert(index, entries[i], 1)) < 0)
goto on_error;
}
return 0;
on_error:
for (i = 0; i < 3; i++) {
if (entries[i] != NULL)
index_entry_free(entries[i]);
}
return ret;
}
static int index_conflict__get_byindex(
const git_index_entry **ancestor_out,
const git_index_entry **our_out,
const git_index_entry **their_out,
git_index *index,
size_t n)
{
const git_index_entry *conflict_entry;
const char *path = NULL;
size_t count;
int stage, len = 0;
assert(ancestor_out && our_out && their_out && index);
*ancestor_out = NULL;
*our_out = NULL;
*their_out = NULL;
for (count = git_index_entrycount(index); n < count; ++n) {
conflict_entry = git_vector_get(&index->entries, n);
if (path && index->entries_cmp_path(conflict_entry->path, path) != 0)
break;
stage = GIT_IDXENTRY_STAGE(conflict_entry);
path = conflict_entry->path;
switch (stage) {
case 3:
*their_out = conflict_entry;
len++;
break;
case 2:
*our_out = conflict_entry;
len++;
break;
case 1:
*ancestor_out = conflict_entry;
len++;
break;
default:
break;
};
}
return len;
}
int git_index_conflict_get(
const git_index_entry **ancestor_out,
const git_index_entry **our_out,
const git_index_entry **their_out,
git_index *index,
const char *path)
{
size_t pos;
int len = 0;
assert(ancestor_out && our_out && their_out && index && path);
*ancestor_out = NULL;
*our_out = NULL;
*their_out = NULL;
if (git_index_find(&pos, index, path) < 0)
return GIT_ENOTFOUND;
if ((len = index_conflict__get_byindex(
ancestor_out, our_out, their_out, index, pos)) < 0)
return len;
else if (len == 0)
return GIT_ENOTFOUND;
return 0;
}
int git_index_conflict_remove(git_index *index, const char *path)
{
size_t pos, posmax;
git_index_entry *conflict_entry;
int error = 0;
assert(index && path);
if (git_index_find(&pos, index, path) < 0)
return GIT_ENOTFOUND;
posmax = git_index_entrycount(index);
while (pos < posmax) {
conflict_entry = git_vector_get(&index->entries, pos);
if (index->entries_cmp_path(conflict_entry->path, path) != 0)
break;
if (GIT_IDXENTRY_STAGE(conflict_entry) == 0) {
pos++;
continue;
}
if ((error = git_vector_remove(&index->entries, pos)) < 0)
return error;
index_entry_free(conflict_entry);
posmax--;
}
return 0;
}
static int index_conflicts_match(const git_vector *v, size_t idx)
{
git_index_entry *entry = git_vector_get(v, idx);
if (GIT_IDXENTRY_STAGE(entry) > 0) {
index_entry_free(entry);
return 1;
}
return 0;
}
void git_index_conflict_cleanup(git_index *index)
{
assert(index);
git_vector_remove_matching(&index->entries, index_conflicts_match);
}
int git_index_has_conflicts(const git_index *index)
{
size_t i;
git_index_entry *entry;
assert(index);
git_vector_foreach(&index->entries, i, entry) {
if (GIT_IDXENTRY_STAGE(entry) > 0)
return 1;
}
return 0;
}
int git_index_conflict_iterator_new(
git_index_conflict_iterator **iterator_out,
git_index *index)
{
git_index_conflict_iterator *it = NULL;
assert(iterator_out && index);
it = git__calloc(1, sizeof(git_index_conflict_iterator));
GITERR_CHECK_ALLOC(it);
it->index = index;
*iterator_out = it;
return 0;
}
int git_index_conflict_next(
const git_index_entry **ancestor_out,
const git_index_entry **our_out,
const git_index_entry **their_out,
git_index_conflict_iterator *iterator)
{
const git_index_entry *entry;
int len;
assert(ancestor_out && our_out && their_out && iterator);
*ancestor_out = NULL;
*our_out = NULL;
*their_out = NULL;
while (iterator->cur < iterator->index->entries.length) {
entry = git_index_get_byindex(iterator->index, iterator->cur);
if (git_index_entry_stage(entry) > 0) {
if ((len = index_conflict__get_byindex(
ancestor_out,
our_out,
their_out,
iterator->index,
iterator->cur)) < 0)
return len;
iterator->cur += len;
return 0;
}
iterator->cur++;
}
return GIT_ITEROVER;
}
void git_index_conflict_iterator_free(git_index_conflict_iterator *iterator)
{
if (iterator == NULL)
return;
git__free(iterator);
}
unsigned int git_index_name_entrycount(git_index *index)
{
assert(index);
return (unsigned int)index->names.length;
}
const git_index_name_entry *git_index_name_get_byindex(
git_index *index, size_t n)
{
assert(index);
git_vector_sort(&index->names);
return git_vector_get(&index->names, n);
}
int git_index_name_add(git_index *index,
const char *ancestor, const char *ours, const char *theirs)
{
git_index_name_entry *conflict_name;
assert ((ancestor && ours) || (ancestor && theirs) || (ours && theirs));
conflict_name = git__calloc(1, sizeof(git_index_name_entry));
GITERR_CHECK_ALLOC(conflict_name);
if (ancestor) {
conflict_name->ancestor = git__strdup(ancestor);
GITERR_CHECK_ALLOC(conflict_name->ancestor);
}
if (ours) {
conflict_name->ours = git__strdup(ours);
GITERR_CHECK_ALLOC(conflict_name->ours);
}
if (theirs) {
conflict_name->theirs = git__strdup(theirs);
GITERR_CHECK_ALLOC(conflict_name->theirs);
}
return git_vector_insert(&index->names, conflict_name);
}
void git_index_name_clear(git_index *index)
{
size_t i;
git_index_name_entry *conflict_name;
assert(index);
git_vector_foreach(&index->names, i, conflict_name) {
if (conflict_name->ancestor)
git__free(conflict_name->ancestor);
if (conflict_name->ours)
git__free(conflict_name->ours);
if (conflict_name->theirs)
git__free(conflict_name->theirs);
git__free(conflict_name);
}
git_vector_clear(&index->names);
}
unsigned int git_index_reuc_entrycount(git_index *index)
{
assert(index);
return (unsigned int)index->reuc.length;
}
static int index_reuc_insert(
git_index *index,
git_index_reuc_entry *reuc,
int replace)
{
git_index_reuc_entry **existing = NULL;
size_t position;
assert(index && reuc && reuc->path != NULL);
if (!git_index_reuc_find(&position, index, reuc->path))
existing = (git_index_reuc_entry **)&index->reuc.contents[position];
if (!replace || !existing)
return git_vector_insert(&index->reuc, reuc);
/* exists, replace it */
git__free((*existing)->path);
git__free(*existing);
*existing = reuc;
return 0;
}
int git_index_reuc_add(git_index *index, const char *path,
int ancestor_mode, const git_oid *ancestor_oid,
int our_mode, const git_oid *our_oid,
int their_mode, const git_oid *their_oid)
{
git_index_reuc_entry *reuc = NULL;
int error = 0;
assert(index && path);
if ((error = index_entry_reuc_init(&reuc, path, ancestor_mode, ancestor_oid, our_mode, our_oid, their_mode, their_oid)) < 0 ||
(error = index_reuc_insert(index, reuc, 1)) < 0)
{
index_entry_reuc_free(reuc);
return error;
}
return error;
}
int git_index_reuc_find(size_t *at_pos, git_index *index, const char *path)
{
return git_vector_bsearch2(at_pos, &index->reuc, index->reuc_search, path);
}
const git_index_reuc_entry *git_index_reuc_get_bypath(
git_index *index, const char *path)
{
size_t pos;
assert(index && path);
if (!index->reuc.length)
return NULL;
git_vector_sort(&index->reuc);
if (git_index_reuc_find(&pos, index, path) < 0)
return NULL;
return git_vector_get(&index->reuc, pos);
}
const git_index_reuc_entry *git_index_reuc_get_byindex(
git_index *index, size_t n)
{
assert(index);
git_vector_sort(&index->reuc);
return git_vector_get(&index->reuc, n);
}
int git_index_reuc_remove(git_index *index, size_t position)
{
int error;
git_index_reuc_entry *reuc;
git_vector_sort(&index->reuc);
reuc = git_vector_get(&index->reuc, position);
error = git_vector_remove(&index->reuc, position);
if (!error)
index_entry_reuc_free(reuc);
return error;
}
void git_index_reuc_clear(git_index *index)
{
size_t i;
assert(index);
for (i = 0; i < index->reuc.length; ++i)
index_entry_reuc_free(git__swap(index->reuc.contents[i], NULL));
git_vector_clear(&index->reuc);
}
static int index_error_invalid(const char *message)
{
giterr_set(GITERR_INDEX, "Invalid data in index - %s", message);
return -1;
}
static int read_reuc(git_index *index, const char *buffer, size_t size)
{
const char *endptr;
size_t len;
int i;
/* If called multiple times, the vector might already be initialized */
if (index->reuc._alloc_size == 0 &&
git_vector_init(&index->reuc, 16, reuc_cmp) < 0)
return -1;
while (size) {
git_index_reuc_entry *lost;
len = p_strnlen(buffer, size) + 1;
if (size <= len)
return index_error_invalid("reading reuc entries");
lost = git__calloc(1, sizeof(git_index_reuc_entry));
GITERR_CHECK_ALLOC(lost);
/* read NUL-terminated pathname for entry */
lost->path = git__strdup(buffer);
GITERR_CHECK_ALLOC(lost->path);
size -= len;
buffer += len;
/* read 3 ASCII octal numbers for stage entries */
for (i = 0; i < 3; i++) {
int tmp;
if (git__strtol32(&tmp, buffer, &endptr, 8) < 0 ||
!endptr || endptr == buffer || *endptr ||
(unsigned)tmp > UINT_MAX) {
index_entry_reuc_free(lost);
return index_error_invalid("reading reuc entry stage");
}
lost->mode[i] = tmp;
len = (endptr + 1) - buffer;
if (size <= len) {
index_entry_reuc_free(lost);
return index_error_invalid("reading reuc entry stage");
}
size -= len;
buffer += len;
}
/* read up to 3 OIDs for stage entries */
for (i = 0; i < 3; i++) {
if (!lost->mode[i])
continue;
if (size < 20) {
index_entry_reuc_free(lost);
return index_error_invalid("reading reuc entry oid");
}
git_oid_fromraw(&lost->oid[i], (const unsigned char *) buffer);
size -= 20;
buffer += 20;
}
/* entry was read successfully - insert into reuc vector */
if (git_vector_insert(&index->reuc, lost) < 0)
return -1;
}
/* entries are guaranteed to be sorted on-disk */
index->reuc.sorted = 1;
return 0;
}
static int read_conflict_names(git_index *index, const char *buffer, size_t size)
{
size_t len;
/* This gets called multiple times, the vector might already be initialized */
if (index->names._alloc_size == 0 &&
git_vector_init(&index->names, 16, conflict_name_cmp) < 0)
return -1;
#define read_conflict_name(ptr) \
len = p_strnlen(buffer, size) + 1; \
if (size < len) \
return index_error_invalid("reading conflict name entries"); \
\
if (len == 1) \
ptr = NULL; \
else { \
ptr = git__malloc(len); \
GITERR_CHECK_ALLOC(ptr); \
memcpy(ptr, buffer, len); \
} \
\
buffer += len; \
size -= len;
while (size) {
git_index_name_entry *conflict_name = git__calloc(1, sizeof(git_index_name_entry));
GITERR_CHECK_ALLOC(conflict_name);
read_conflict_name(conflict_name->ancestor);
read_conflict_name(conflict_name->ours);
read_conflict_name(conflict_name->theirs);
if (git_vector_insert(&index->names, conflict_name) < 0)
return -1;
}
#undef read_conflict_name
/* entries are guaranteed to be sorted on-disk */
index->names.sorted = 1;
return 0;
}
static size_t read_entry(git_index_entry *dest, const void *buffer, size_t buffer_size)
{
size_t path_length, entry_size;
uint16_t flags_raw;
const char *path_ptr;
const struct entry_short *source = buffer;
if (INDEX_FOOTER_SIZE + minimal_entry_size > buffer_size)
return 0;
memset(dest, 0x0, sizeof(git_index_entry));
dest->ctime.seconds = (git_time_t)ntohl(source->ctime.seconds);
dest->ctime.nanoseconds = ntohl(source->ctime.nanoseconds);
dest->mtime.seconds = (git_time_t)ntohl(source->mtime.seconds);
dest->mtime.nanoseconds = ntohl(source->mtime.nanoseconds);
dest->dev = ntohl(source->dev);
dest->ino = ntohl(source->ino);
dest->mode = ntohl(source->mode);
dest->uid = ntohl(source->uid);
dest->gid = ntohl(source->gid);
dest->file_size = ntohl(source->file_size);
git_oid_cpy(&dest->oid, &source->oid);
dest->flags = ntohs(source->flags);
if (dest->flags & GIT_IDXENTRY_EXTENDED) {
const struct entry_long *source_l = (const struct entry_long *)source;
path_ptr = source_l->path;
flags_raw = ntohs(source_l->flags_extended);
memcpy(&dest->flags_extended, &flags_raw, 2);
} else
path_ptr = source->path;
path_length = dest->flags & GIT_IDXENTRY_NAMEMASK;
/* if this is a very long string, we must find its
* real length without overflowing */
if (path_length == 0xFFF) {
const char *path_end;
path_end = memchr(path_ptr, '\0', buffer_size);
if (path_end == NULL)
return 0;
path_length = path_end - path_ptr;
}
if (dest->flags & GIT_IDXENTRY_EXTENDED)
entry_size = long_entry_size(path_length);
else
entry_size = short_entry_size(path_length);
if (INDEX_FOOTER_SIZE + entry_size > buffer_size)
return 0;
dest->path = git__strdup(path_ptr);
assert(dest->path);
return entry_size;
}
static int read_header(struct index_header *dest, const void *buffer)
{
const struct index_header *source = buffer;
dest->signature = ntohl(source->signature);
if (dest->signature != INDEX_HEADER_SIG)
return index_error_invalid("incorrect header signature");
dest->version = ntohl(source->version);
if (dest->version != INDEX_VERSION_NUMBER_EXT &&
dest->version != INDEX_VERSION_NUMBER)
return index_error_invalid("incorrect header version");
dest->entry_count = ntohl(source->entry_count);
return 0;
}
static size_t read_extension(git_index *index, const char *buffer, size_t buffer_size)
{
const struct index_extension *source;
struct index_extension dest;
size_t total_size;
source = (const struct index_extension *)(buffer);
memcpy(dest.signature, source->signature, 4);
dest.extension_size = ntohl(source->extension_size);
total_size = dest.extension_size + sizeof(struct index_extension);
if (dest.extension_size > total_size ||
buffer_size < total_size ||
buffer_size - total_size < INDEX_FOOTER_SIZE)
return 0;
/* optional extension */
if (dest.signature[0] >= 'A' && dest.signature[0] <= 'Z') {
/* tree cache */
if (memcmp(dest.signature, INDEX_EXT_TREECACHE_SIG, 4) == 0) {
if (git_tree_cache_read(&index->tree, buffer + 8, dest.extension_size) < 0)
return 0;
} else if (memcmp(dest.signature, INDEX_EXT_UNMERGED_SIG, 4) == 0) {
if (read_reuc(index, buffer + 8, dest.extension_size) < 0)
return 0;
} else if (memcmp(dest.signature, INDEX_EXT_CONFLICT_NAME_SIG, 4) == 0) {
if (read_conflict_names(index, buffer + 8, dest.extension_size) < 0)
return 0;
}
/* else, unsupported extension. We cannot parse this, but we can skip
* it by returning `total_size */
} else {
/* we cannot handle non-ignorable extensions;
* in fact they aren't even defined in the standard */
return 0;
}
return total_size;
}
static int parse_index(git_index *index, const char *buffer, size_t buffer_size)
{
unsigned int i;
struct index_header header = { 0 };
git_oid checksum_calculated, checksum_expected;
#define seek_forward(_increase) { \
if (_increase >= buffer_size) \
return index_error_invalid("ran out of data while parsing"); \
buffer += _increase; \
buffer_size -= _increase;\
}
if (buffer_size < INDEX_HEADER_SIZE + INDEX_FOOTER_SIZE)
return index_error_invalid("insufficient buffer space");
/* Precalculate the SHA1 of the files's contents -- we'll match it to
* the provided SHA1 in the footer */
git_hash_buf(&checksum_calculated, buffer, buffer_size - INDEX_FOOTER_SIZE);
/* Parse header */
if (read_header(&header, buffer) < 0)
return -1;
seek_forward(INDEX_HEADER_SIZE);
git_vector_clear(&index->entries);
/* Parse all the entries */
for (i = 0; i < header.entry_count && buffer_size > INDEX_FOOTER_SIZE; ++i) {
size_t entry_size;
git_index_entry *entry;
entry = git__malloc(sizeof(git_index_entry));
GITERR_CHECK_ALLOC(entry);
entry_size = read_entry(entry, buffer, buffer_size);
/* 0 bytes read means an object corruption */
if (entry_size == 0)
return index_error_invalid("invalid entry");
if (git_vector_insert(&index->entries, entry) < 0)
return -1;
seek_forward(entry_size);
}
if (i != header.entry_count)
return index_error_invalid("header entries changed while parsing");
/* There's still space for some extensions! */
while (buffer_size > INDEX_FOOTER_SIZE) {
size_t extension_size;
extension_size = read_extension(index, buffer, buffer_size);
/* see if we have read any bytes from the extension */
if (extension_size == 0)
return index_error_invalid("extension is truncated");
seek_forward(extension_size);
}
if (buffer_size != INDEX_FOOTER_SIZE)
return index_error_invalid("buffer size does not match index footer size");
/* 160-bit SHA-1 over the content of the index file before this checksum. */
git_oid_fromraw(&checksum_expected, (const unsigned char *)buffer);
if (git_oid__cmp(&checksum_calculated, &checksum_expected) != 0)
return index_error_invalid("calculated checksum does not match expected");
#undef seek_forward
/* Entries are stored case-sensitively on disk. */
index->entries.sorted = !index->ignore_case;
git_vector_sort(&index->entries);
return 0;
}
static bool is_index_extended(git_index *index)
{
size_t i, extended;
git_index_entry *entry;
extended = 0;
git_vector_foreach(&index->entries, i, entry) {
entry->flags &= ~GIT_IDXENTRY_EXTENDED;
if (entry->flags_extended & GIT_IDXENTRY_EXTENDED_FLAGS) {
extended++;
entry->flags |= GIT_IDXENTRY_EXTENDED;
}
}
return (extended > 0);
}
static int write_disk_entry(git_filebuf *file, git_index_entry *entry)
{
void *mem = NULL;
struct entry_short *ondisk;
size_t path_len, disk_size;
char *path;
path_len = strlen(entry->path);
if (entry->flags & GIT_IDXENTRY_EXTENDED)
disk_size = long_entry_size(path_len);
else
disk_size = short_entry_size(path_len);
if (git_filebuf_reserve(file, &mem, disk_size) < 0)
return -1;
ondisk = (struct entry_short *)mem;
memset(ondisk, 0x0, disk_size);
/**
* Yes, we have to truncate.
*
* The on-disk format for Index entries clearly defines
* the time and size fields to be 4 bytes each -- so even if
* we store these values with 8 bytes on-memory, they must
* be truncated to 4 bytes before writing to disk.
*
* In 2038 I will be either too dead or too rich to care about this
*/
ondisk->ctime.seconds = htonl((uint32_t)entry->ctime.seconds);
ondisk->mtime.seconds = htonl((uint32_t)entry->mtime.seconds);
ondisk->ctime.nanoseconds = htonl(entry->ctime.nanoseconds);
ondisk->mtime.nanoseconds = htonl(entry->mtime.nanoseconds);
ondisk->dev = htonl(entry->dev);
ondisk->ino = htonl(entry->ino);
ondisk->mode = htonl(entry->mode);
ondisk->uid = htonl(entry->uid);
ondisk->gid = htonl(entry->gid);
ondisk->file_size = htonl((uint32_t)entry->file_size);
git_oid_cpy(&ondisk->oid, &entry->oid);
ondisk->flags = htons(entry->flags);
if (entry->flags & GIT_IDXENTRY_EXTENDED) {
struct entry_long *ondisk_ext;
ondisk_ext = (struct entry_long *)ondisk;
ondisk_ext->flags_extended = htons(entry->flags_extended);
path = ondisk_ext->path;
}
else
path = ondisk->path;
memcpy(path, entry->path, path_len);
return 0;
}
static int write_entries(git_index *index, git_filebuf *file)
{
int error = 0;
size_t i;
git_vector case_sorted;
git_index_entry *entry;
git_vector *out = &index->entries;
/* If index->entries is sorted case-insensitively, then we need
* to re-sort it case-sensitively before writing */
if (index->ignore_case) {
git_vector_dup(&case_sorted, &index->entries, index_cmp);
git_vector_sort(&case_sorted);
out = &case_sorted;
}
git_vector_foreach(out, i, entry)
if ((error = write_disk_entry(file, entry)) < 0)
break;
if (index->ignore_case)
git_vector_free(&case_sorted);
return error;
}
static int write_extension(git_filebuf *file, struct index_extension *header, git_buf *data)
{
struct index_extension ondisk;
int error = 0;
memset(&ondisk, 0x0, sizeof(struct index_extension));
memcpy(&ondisk, header, 4);
ondisk.extension_size = htonl(header->extension_size);
if ((error = git_filebuf_write(file, &ondisk, sizeof(struct index_extension))) == 0)
error = git_filebuf_write(file, data->ptr, data->size);
return error;
}
static int create_name_extension_data(git_buf *name_buf, git_index_name_entry *conflict_name)
{
int error = 0;
if (conflict_name->ancestor == NULL)
error = git_buf_put(name_buf, "\0", 1);
else
error = git_buf_put(name_buf, conflict_name->ancestor, strlen(conflict_name->ancestor) + 1);
if (error != 0)
goto on_error;
if (conflict_name->ours == NULL)
error = git_buf_put(name_buf, "\0", 1);
else
error = git_buf_put(name_buf, conflict_name->ours, strlen(conflict_name->ours) + 1);
if (error != 0)
goto on_error;
if (conflict_name->theirs == NULL)
error = git_buf_put(name_buf, "\0", 1);
else
error = git_buf_put(name_buf, conflict_name->theirs, strlen(conflict_name->theirs) + 1);
on_error:
return error;
}
static int write_name_extension(git_index *index, git_filebuf *file)
{
git_buf name_buf = GIT_BUF_INIT;
git_vector *out = &index->names;
git_index_name_entry *conflict_name;
struct index_extension extension;
size_t i;
int error = 0;
git_vector_foreach(out, i, conflict_name) {
if ((error = create_name_extension_data(&name_buf, conflict_name)) < 0)
goto done;
}
memset(&extension, 0x0, sizeof(struct index_extension));
memcpy(&extension.signature, INDEX_EXT_CONFLICT_NAME_SIG, 4);
extension.extension_size = (uint32_t)name_buf.size;
error = write_extension(file, &extension, &name_buf);
git_buf_free(&name_buf);
done:
return error;
}
static int create_reuc_extension_data(git_buf *reuc_buf, git_index_reuc_entry *reuc)
{
int i;
int error = 0;
if ((error = git_buf_put(reuc_buf, reuc->path, strlen(reuc->path) + 1)) < 0)
return error;
for (i = 0; i < 3; i++) {
if ((error = git_buf_printf(reuc_buf, "%o", reuc->mode[i])) < 0 ||
(error = git_buf_put(reuc_buf, "\0", 1)) < 0)
return error;
}
for (i = 0; i < 3; i++) {
if (reuc->mode[i] && (error = git_buf_put(reuc_buf, (char *)&reuc->oid[i].id, GIT_OID_RAWSZ)) < 0)
return error;
}
return 0;
}
static int write_reuc_extension(git_index *index, git_filebuf *file)
{
git_buf reuc_buf = GIT_BUF_INIT;
git_vector *out = &index->reuc;
git_index_reuc_entry *reuc;
struct index_extension extension;
size_t i;
int error = 0;
git_vector_foreach(out, i, reuc) {
if ((error = create_reuc_extension_data(&reuc_buf, reuc)) < 0)
goto done;
}
memset(&extension, 0x0, sizeof(struct index_extension));
memcpy(&extension.signature, INDEX_EXT_UNMERGED_SIG, 4);
extension.extension_size = (uint32_t)reuc_buf.size;
error = write_extension(file, &extension, &reuc_buf);
git_buf_free(&reuc_buf);
done:
return error;
}
static int write_index(git_index *index, git_filebuf *file)
{
git_oid hash_final;
struct index_header header;
bool is_extended;
assert(index && file);
is_extended = is_index_extended(index);
header.signature = htonl(INDEX_HEADER_SIG);
header.version = htonl(is_extended ? INDEX_VERSION_NUMBER_EXT : INDEX_VERSION_NUMBER);
header.entry_count = htonl((uint32_t)index->entries.length);
if (git_filebuf_write(file, &header, sizeof(struct index_header)) < 0)
return -1;
if (write_entries(index, file) < 0)
return -1;
/* TODO: write tree cache extension */
/* write the rename conflict extension */
if (index->names.length > 0 && write_name_extension(index, file) < 0)
return -1;
/* write the reuc extension */
if (index->reuc.length > 0 && write_reuc_extension(index, file) < 0)
return -1;
/* get out the hash for all the contents we've appended to the file */
git_filebuf_hash(&hash_final, file);
/* write it at the end of the file */
return git_filebuf_write(file, hash_final.id, GIT_OID_RAWSZ);
}
int git_index_entry_stage(const git_index_entry *entry)
{
return GIT_IDXENTRY_STAGE(entry);
}
typedef struct read_tree_data {
git_vector *old_entries;
git_vector *new_entries;
git_vector_cmp entries_search;
} read_tree_data;
static int read_tree_cb(
const char *root, const git_tree_entry *tentry, void *payload)
{
read_tree_data *data = payload;
git_index_entry *entry = NULL, *old_entry;
git_buf path = GIT_BUF_INIT;
if (git_tree_entry__is_tree(tentry))
return 0;
if (git_buf_joinpath(&path, root, tentry->filename) < 0)
return -1;
entry = git__calloc(1, sizeof(git_index_entry));
GITERR_CHECK_ALLOC(entry);
entry->mode = tentry->attr;
entry->oid = tentry->oid;
/* look for corresponding old entry and copy data to new entry */
if (data->old_entries) {
size_t pos;
struct entry_srch_key skey;
skey.path = path.ptr;
skey.stage = 0;
if (!git_vector_bsearch2(
&pos, data->old_entries, data->entries_search, &skey) &&
(old_entry = git_vector_get(data->old_entries, pos)) != NULL &&
entry->mode == old_entry->mode &&
git_oid_equal(&entry->oid, &old_entry->oid))
{
memcpy(entry, old_entry, sizeof(*entry));
entry->flags_extended = 0;
}
}
if (path.size < GIT_IDXENTRY_NAMEMASK)
entry->flags = path.size & GIT_IDXENTRY_NAMEMASK;
else
entry->flags = GIT_IDXENTRY_NAMEMASK;
entry->path = git_buf_detach(&path);
git_buf_free(&path);
if (git_vector_insert(data->new_entries, entry) < 0) {
index_entry_free(entry);
return -1;
}
return 0;
}
int git_index_read_tree(git_index *index, const git_tree *tree)
{
int error = 0;
git_vector entries = GIT_VECTOR_INIT;
read_tree_data data;
git_vector_set_cmp(&entries, index->entries._cmp); /* match sort */
data.old_entries = &index->entries;
data.new_entries = &entries;
data.entries_search = index->entries_search;
git_vector_sort(&index->entries);
error = git_tree_walk(tree, GIT_TREEWALK_POST, read_tree_cb, &data);
git_vector_sort(&entries);
git_index_clear(index);
git_vector_swap(&entries, &index->entries);
git_vector_free(&entries);
return error;
}
git_repository *git_index_owner(const git_index *index)
{
return INDEX_OWNER(index);
}
int git_index_add_all(
git_index *index,
const git_strarray *paths,
unsigned int flags,
git_index_matched_path_cb cb,
void *payload)
{
int error;
git_repository *repo;
git_iterator *wditer = NULL;
const git_index_entry *wd = NULL;
git_index_entry *entry;
git_pathspec ps;
const char *match;
size_t existing;
bool no_fnmatch = (flags & GIT_INDEX_ADD_DISABLE_PATHSPEC_MATCH) != 0;
int ignorecase;
git_oid blobid;
assert(index);
if (INDEX_OWNER(index) == NULL)
return create_index_error(-1,
"Could not add paths to index. "
"Index is not backed up by an existing repository.");
repo = INDEX_OWNER(index);
if ((error = git_repository__ensure_not_bare(repo, "index add all")) < 0)
return error;
if (git_repository__cvar(&ignorecase, repo, GIT_CVAR_IGNORECASE) < 0)
return -1;
if ((error = git_pathspec__init(&ps, paths)) < 0)
return error;
/* optionally check that pathspec doesn't mention any ignored files */
if ((flags & GIT_INDEX_ADD_CHECK_PATHSPEC) != 0 &&
(flags & GIT_INDEX_ADD_FORCE) == 0 &&
(error = git_ignore__check_pathspec_for_exact_ignores(
repo, &ps.pathspec, no_fnmatch)) < 0)
goto cleanup;
if ((error = git_iterator_for_workdir(
&wditer, repo, 0, ps.prefix, ps.prefix)) < 0)
goto cleanup;
while (!(error = git_iterator_advance(&wd, wditer))) {
/* check if path actually matches */
if (!git_pathspec__match(
&ps.pathspec, wd->path, no_fnmatch, (bool)ignorecase, &match, NULL))
continue;
/* skip ignored items that are not already in the index */
if ((flags & GIT_INDEX_ADD_FORCE) == 0 &&
git_iterator_current_is_ignored(wditer) &&
git_index__find(&existing, index, wd->path, 0) < 0)
continue;
/* issue notification callback if requested */
if (cb && (error = cb(wd->path, match, payload)) != 0) {
if (error > 0) /* return > 0 means skip this one */
continue;
if (error < 0) { /* return < 0 means abort */
giterr_clear();
error = GIT_EUSER;
break;
}
}
/* TODO: Should we check if the file on disk is already an exact
* match to the file in the index and skip this work if it is?
*/
/* write the blob to disk and get the oid */
if ((error = git_blob_create_fromworkdir(&blobid, repo, wd->path)) < 0)
break;
/* make the new entry to insert */
if ((entry = index_entry_dup(wd)) == NULL) {
error = -1;
break;
}
entry->oid = blobid;
/* add working directory item to index */
if ((error = index_insert(index, entry, 1)) < 0) {
index_entry_free(entry);
break;
}
git_tree_cache_invalidate_path(index->tree, wd->path);
/* add implies conflict resolved, move conflict entries to REUC */
if ((error = index_conflict_to_reuc(index, wd->path)) < 0) {
if (error != GIT_ENOTFOUND)
break;
giterr_clear();
}
}
if (error == GIT_ITEROVER)
error = 0;
cleanup:
git_iterator_free(wditer);
git_pathspec__clear(&ps);
return error;
}
enum {
INDEX_ACTION_NONE = 0,
INDEX_ACTION_UPDATE = 1,
INDEX_ACTION_REMOVE = 2,
};
static int index_apply_to_all(
git_index *index,
int action,
const git_strarray *paths,
git_index_matched_path_cb cb,
void *payload)
{
int error = 0;
size_t i;
git_pathspec ps;
const char *match;
git_buf path = GIT_BUF_INIT;
assert(index);
if ((error = git_pathspec__init(&ps, paths)) < 0)
return error;
git_vector_sort(&index->entries);
for (i = 0; !error && i < index->entries.length; ++i) {
git_index_entry *entry = git_vector_get(&index->entries, i);
/* check if path actually matches */
if (!git_pathspec__match(
&ps.pathspec, entry->path, false, (bool)index->ignore_case,
&match, NULL))
continue;
/* issue notification callback if requested */
if (cb && (error = cb(entry->path, match, payload)) != 0) {
if (error > 0) { /* return > 0 means skip this one */
error = 0;
continue;
}
if (error < 0) { /* return < 0 means abort */
giterr_clear();
error = GIT_EUSER;
break;
}
}
/* index manipulation may alter entry, so don't depend on it */
if ((error = git_buf_sets(&path, entry->path)) < 0)
break;
switch (action) {
case INDEX_ACTION_NONE:
break;
case INDEX_ACTION_UPDATE:
error = git_index_add_bypath(index, path.ptr);
if (error == GIT_ENOTFOUND) {
giterr_clear();
error = git_index_remove_bypath(index, path.ptr);
if (!error) /* back up foreach if we removed this */
i--;
}
break;
case INDEX_ACTION_REMOVE:
if (!(error = git_index_remove_bypath(index, path.ptr)))
i--; /* back up foreach if we removed this */
break;
default:
giterr_set(GITERR_INVALID, "Unknown index action %d", action);
error = -1;
break;
}
}
git_buf_free(&path);
git_pathspec__clear(&ps);
return error;
}
int git_index_remove_all(
git_index *index,
const git_strarray *pathspec,
git_index_matched_path_cb cb,
void *payload)
{
return index_apply_to_all(
index, INDEX_ACTION_REMOVE, pathspec, cb, payload);
}
int git_index_update_all(
git_index *index,
const git_strarray *pathspec,
git_index_matched_path_cb cb,
void *payload)
{
return index_apply_to_all(
index, INDEX_ACTION_UPDATE, pathspec, cb, payload);
}
