static struct cache_entry *read_one_ent(const char *which,
unsigned char *ent, const char *path,
int namelen, int stage)
{
unsigned mode;
unsigned char sha1[20];
int size;
struct cache_entry *ce;
if (get_tree_entry(ent, path, sha1, &mode)) {
if (which)
error("%s: not in %s branch.", path, which);
return NULL;
}
if (mode == S_IFDIR) {
if (which)
error("%s: not a blob in %s branch.", path, which);
return NULL;
}
size = cache_entry_size(namelen);
ce = xcalloc(1, size);
hashcpy(ce->sha1, sha1);
memcpy(ce->name, path, namelen);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = namelen;
ce->ce_mode = create_ce_mode(mode);
return ce;
}
static int add_one_path(const struct cache_entry *old, const char *path, int len, struct stat *st)
{
int option, size;
struct cache_entry *ce;
/* Was the old index entry already up-to-date? */
if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
return 0;
size = cache_entry_size(len);
ce = xcalloc(1, size);
memcpy(ce->name, path, len);
ce->ce_flags = create_ce_flags(0);
ce->ce_namelen = len;
fill_stat_cache_info(ce, st);
ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
if (index_path(ce->sha1, path, st,
info_only ? 0 : HASH_WRITE_OBJECT)) {
free(ce);
return -1;
}
option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
if (add_cache_entry(ce, option))
return error("%s: cannot add to the index - missing --add option?", path);
return 0;
}
static struct cache_entry *read_one_ent(const char *which,
struct object_id *ent, const char *path,
int namelen, int stage)
{
unsigned mode;
struct object_id oid;
int size;
struct cache_entry *ce;
if (get_tree_entry(ent->hash, path, oid.hash, &mode)) {
if (which)
error("%s: not in %s branch.", path, which);
return NULL;
}
if (mode == S_IFDIR) {
if (which)
error("%s: not a blob in %s branch.", path, which);
return NULL;
}
size = cache_entry_size(namelen);
ce = xcalloc(1, size);
oidcpy(&ce->oid, &oid);
memcpy(ce->name, path, namelen);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = namelen;
ce->ce_mode = create_ce_mode(mode);
return ce;
}
static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
const char *path, int stage)
{
int size, len, option;
struct cache_entry *ce;
if (!verify_path(path))
return error("Invalid path '%s'", path);
len = strlen(path);
size = cache_entry_size(len);
ce = xcalloc(1, size);
hashcpy(ce->sha1, sha1);
memcpy(ce->name, path, len);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = len;
ce->ce_mode = create_ce_mode(mode);
if (assume_unchanged)
ce->ce_flags |= CE_VALID;
option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
if (add_cache_entry(ce, option))
return error("%s: cannot add to the index - missing --add option?",
path);
report("add '%s'", path);
return 0;
}
static struct cache_entry *create_ce_entry(const struct traverse_info *info, const struct name_entry *n, int stage)
{
int len = traverse_path_len(info, n);
struct cache_entry *ce = xcalloc(1, cache_entry_size(len));
ce->ce_mode = create_ce_mode(n->mode);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = len;
hashcpy(ce->sha1, n->sha1);
make_traverse_path(ce->name, info, n);
return ce;
}
int git_checkout_file(const char *ref, const char *path, const char *outputpath)
{
struct cache_entry *ce;
int ret;
GIT_HASH sha1;
struct tree * root;
struct checkout state;
struct pathspec pathspec;
const char *match[2];
ret = get_sha1(ref, sha1);
if(ret)
return ret;
reprepare_packed_git();
root = parse_tree_indirect(sha1);
if(!root)
{
free_all_pack();
return -1;
}
ce = xcalloc(1, cache_entry_size(strlen(path)));
match[0] = path;
match[1] = NULL;
init_pathspec(&pathspec, match);
pathspec.items[0].use_wildcard = 0;
ret = read_tree_recursive(root, "", 0, 0, &pathspec, update_some, ce);
free_pathspec(&pathspec);
if(ret)
{
free_all_pack();
free(ce);
return ret;
}
memset(&state, 0, sizeof(state));
state.force = 1;
state.refresh_cache = 0;
ret = write_entry(ce, outputpath, &state, 0);
free_all_pack();
free(ce);
return ret;
}
int git_checkout_file(const char* ref, const char* path, char* outputpath)
{
struct cache_entry *ce;
int ret;
struct object_id oid;
struct tree * root;
struct checkout state;
struct pathspec pathspec;
const char *matchbuf[1];
ret = get_oid(ref, &oid);
if(ret)
return ret;
reprepare_packed_git(the_repository);
root = parse_tree_indirect(&oid);
if(!root)
{
free_all_pack();
return -1;
}
ce = xcalloc(1, cache_entry_size(strlen(path)));
matchbuf[0] = NULL;
parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC, PATHSPEC_PREFER_CWD, path, matchbuf);
pathspec.items[0].nowildcard_len = pathspec.items[0].len;
ret = read_tree_recursive(root, "", 0, 0, &pathspec, update_some, ce);
clear_pathspec(&pathspec);
if(ret)
{
free_all_pack();
free(ce);
return ret;
}
memset(&state, 0, sizeof(state));
state.force = 1;
state.refresh_cache = 0;
ret = write_entry(ce, outputpath, &state, 0);
free_all_pack();
free(ce);
return ret;
}
static int read_one_entry_opt(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, int opt)
{
int len;
unsigned int size;
struct cache_entry *ce;
if (S_ISDIR(mode))
return READ_TREE_RECURSIVE;
len = strlen(pathname);
size = cache_entry_size(baselen + len);
ce = xcalloc(1, size);
ce->ce_mode = create_ce_mode(mode);
ce->ce_flags = create_ce_flags(baselen + len, stage);
memcpy(ce->name, base, baselen);
memcpy(ce->name + baselen, pathname, len+1);
hashcpy(ce->sha1, sha1);
return add_cache_entry(ce, opt);
}
static int add_file_to_cache(char *path)
{
int size, namelen;
struct cache_entry *ce;
struct stat st;
int fd;
fd = open(path, O_RDONLY);
if (fd < 0) {
if (errno == ENOENT)
return remove_file_from_cache(path);
return -1;
}
if (fstat(fd, &st) < 0) {
close(fd);
return -1;
}
namelen = strlen(path);
size = cache_entry_size(namelen);
ce = malloc(size);
memset(ce, 0, size);
memcpy(ce->name, path, namelen);
ce->ctime.sec = st.st_ctime;
ce->ctime.nsec = st.st_ctim.tv_nsec;
ce->mtime.sec = st.st_mtime;
ce->mtime.nsec = st.st_mtim.tv_nsec;
ce->st_dev = st.st_dev;
ce->st_ino = st.st_ino;
ce->st_mode = st.st_mode;
ce->st_uid = st.st_uid;
ce->st_gid = st.st_gid;
ce->st_size = st.st_size;
ce->namelen = namelen;
if (index_fd(path, namelen, ce, fd, &st) < 0)
return -1;
return add_cache_entry(ce);
}
static int update_some(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode, int stage, void *context)
{
int len;
struct cache_entry *ce;
int pos;
if (S_ISDIR(mode))
return READ_TREE_RECURSIVE;
len = base->len + strlen(pathname);
ce = xcalloc(1, cache_entry_size(len));
oidcpy(&ce->oid, oid);
memcpy(ce->name, base->buf, base->len);
memcpy(ce->name + base->len, pathname, len - base->len);
ce->ce_flags = create_ce_flags(0) | CE_UPDATE;
ce->ce_namelen = len;
ce->ce_mode = create_ce_mode(mode);
/*
* If the entry is the same as the current index, we can leave the old
* entry in place. Whether it is UPTODATE or not, checkout_entry will
* do the right thing.
*/
pos = cache_name_pos(ce->name, ce->ce_namelen);
if (pos >= 0) {
struct cache_entry *old = active_cache[pos];
if (ce->ce_mode == old->ce_mode &&
!oidcmp(&ce->oid, &old->oid)) {
old->ce_flags |= CE_UPDATE;
free(ce);
return 0;
}
}
add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
return 0;
}
/*
* N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the
* resulting index, -2 on failure to reflect the changes to the work tree.
*
* CE_ADDED, CE_UNPACKED and CE_NEW_SKIP_WORKTREE are used internally
*/
int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o)
{
int i, ret;
static struct cache_entry *dfc;
struct exclude_list el;
if (len > MAX_UNPACK_TREES)
die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES);
memset(&state, 0, sizeof(state));
state.base_dir = "";
state.force = 1;
state.quiet = 1;
state.refresh_cache = 1;
state.istate = &o->result;
memset(&el, 0, sizeof(el));
if (!core_apply_sparse_checkout || !o->update)
o->skip_sparse_checkout = 1;
if (!o->skip_sparse_checkout) {
char *sparse = git_pathdup("info/sparse-checkout");
if (add_excludes_from_file_to_list(sparse, "", 0, &el, 0) < 0)
o->skip_sparse_checkout = 1;
else
o->el = ⪙
free(sparse);
}
memset(&o->result, 0, sizeof(o->result));
o->result.initialized = 1;
o->result.timestamp.sec = o->src_index->timestamp.sec;
o->result.timestamp.nsec = o->src_index->timestamp.nsec;
o->result.version = o->src_index->version;
o->result.split_index = o->src_index->split_index;
if (o->result.split_index)
o->result.split_index->refcount++;
hashcpy(o->result.sha1, o->src_index->sha1);
o->merge_size = len;
mark_all_ce_unused(o->src_index);
/*
* Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries
*/
if (!o->skip_sparse_checkout)
mark_new_skip_worktree(o->el, o->src_index, 0, CE_NEW_SKIP_WORKTREE);
if (!dfc)
dfc = xcalloc(1, cache_entry_size(0));
o->df_conflict_entry = dfc;
if (len) {
const char *prefix = o->prefix ? o->prefix : "";
struct traverse_info info;
setup_traverse_info(&info, prefix);
info.fn = unpack_callback;
info.data = o;
info.show_all_errors = o->show_all_errors;
info.pathspec = o->pathspec;
if (o->prefix) {
/*
* Unpack existing index entries that sort before the
* prefix the tree is spliced into. Note that o->merge
* is always true in this case.
*/
while (1) {
struct cache_entry *ce = next_cache_entry(o);
if (!ce)
break;
if (ce_in_traverse_path(ce, &info))
break;
if (unpack_index_entry(ce, o) < 0)
goto return_failed;
}
}
if (traverse_trees(len, t, &info) < 0)
goto return_failed;
}
/* Any left-over entries in the index? */
if (o->merge) {
while (1) {
struct cache_entry *ce = next_cache_entry(o);
if (!ce)
break;
if (unpack_index_entry(ce, o) < 0)
goto return_failed;
}
}
mark_all_ce_unused(o->src_index);
if (o->trivial_merges_only && o->nontrivial_merge) {
ret = unpack_failed(o, "Merge requires file-level merging");
goto done;
}
if (!o->skip_sparse_checkout) {
int empty_worktree = 1;
/*
* Sparse checkout loop #2: set NEW_SKIP_WORKTREE on entries not in loop #1
* If the will have NEW_SKIP_WORKTREE, also set CE_SKIP_WORKTREE
* so apply_sparse_checkout() won't attempt to remove it from worktree
*/
mark_new_skip_worktree(o->el, &o->result, CE_ADDED, CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE);
ret = 0;
for (i = 0; i < o->result.cache_nr; i++) {
struct cache_entry *ce = o->result.cache[i];
/*
* Entries marked with CE_ADDED in merged_entry() do not have
* verify_absent() check (the check is effectively disabled
* because CE_NEW_SKIP_WORKTREE is set unconditionally).
*
* Do the real check now because we have had
* correct CE_NEW_SKIP_WORKTREE
*/
if (ce->ce_flags & CE_ADDED &&
verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) {
if (!o->show_all_errors)
goto return_failed;
ret = -1;
}
if (apply_sparse_checkout(&o->result, ce, o)) {
if (!o->show_all_errors)
goto return_failed;
ret = -1;
}
if (!ce_skip_worktree(ce))
empty_worktree = 0;
}
if (ret < 0)
goto return_failed;
/*
* Sparse checkout is meant to narrow down checkout area
* but it does not make sense to narrow down to empty working
* tree. This is usually a mistake in sparse checkout rules.
* Do not allow users to do that.
*/
if (o->result.cache_nr && empty_worktree) {
ret = unpack_failed(o, "Sparse checkout leaves no entry on working directory");
goto done;
}
}
o->src_index = NULL;
ret = check_updates(o) ? (-2) : 0;
if (o->dst_index) {
if (!ret) {
if (!o->result.cache_tree)
o->result.cache_tree = cache_tree();
if (!cache_tree_fully_valid(o->result.cache_tree))
cache_tree_update(&o->result,
WRITE_TREE_SILENT |
WRITE_TREE_REPAIR);
}
discard_index(o->dst_index);
*o->dst_index = o->result;
} else {
discard_index(&o->result);
}
done:
clear_exclude_list(&el);
return ret;
return_failed:
if (o->show_all_errors)
display_error_msgs(o);
mark_all_ce_unused(o->src_index);
ret = unpack_failed(o, NULL);
if (o->exiting_early)
ret = 0;
goto done;
}
/*
* Prepare a dummy commit that represents the work tree (or staged) item.
* Note that annotating work tree item never works in the reverse.
*/
static struct commit *fake_working_tree_commit(struct diff_options *opt,
const char *path,
const char *contents_from)
{
struct commit *commit;
struct blame_origin *origin;
struct commit_list **parent_tail, *parent;
struct object_id head_oid;
struct strbuf buf = STRBUF_INIT;
const char *ident;
time_t now;
int size, len;
struct cache_entry *ce;
unsigned mode;
struct strbuf msg = STRBUF_INIT;
read_cache();
time(&now);
commit = alloc_commit_node();
commit->object.parsed = 1;
commit->date = now;
parent_tail = &commit->parents;
if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL))
die("no such ref: HEAD");
parent_tail = append_parent(parent_tail, &head_oid);
append_merge_parents(parent_tail);
verify_working_tree_path(commit, path);
origin = make_origin(commit, path);
ident = fmt_ident("Not Committed Yet", "not.committed.yet", NULL, 0);
strbuf_addstr(&msg, "tree 0000000000000000000000000000000000000000\n");
for (parent = commit->parents; parent; parent = parent->next)
strbuf_addf(&msg, "parent %s\n",
oid_to_hex(&parent->item->object.oid));
strbuf_addf(&msg,
"author %s\n"
"committer %s\n\n"
"Version of %s from %s\n",
ident, ident, path,
(!contents_from ? path :
(!strcmp(contents_from, "-") ? "standard input" : contents_from)));
set_commit_buffer_from_strbuf(commit, &msg);
if (!contents_from || strcmp("-", contents_from)) {
struct stat st;
const char *read_from;
char *buf_ptr;
unsigned long buf_len;
if (contents_from) {
if (stat(contents_from, &st) < 0)
die_errno("Cannot stat '%s'", contents_from);
read_from = contents_from;
}
else {
if (lstat(path, &st) < 0)
die_errno("Cannot lstat '%s'", path);
read_from = path;
}
mode = canon_mode(st.st_mode);
switch (st.st_mode & S_IFMT) {
case S_IFREG:
if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
textconv_object(read_from, mode, &null_oid, 0, &buf_ptr, &buf_len))
strbuf_attach(&buf, buf_ptr, buf_len, buf_len + 1);
else if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size)
die_errno("cannot open or read '%s'", read_from);
break;
case S_IFLNK:
if (strbuf_readlink(&buf, read_from, st.st_size) < 0)
die_errno("cannot readlink '%s'", read_from);
break;
default:
die("unsupported file type %s", read_from);
}
}
else {
/* Reading from stdin */
mode = 0;
if (strbuf_read(&buf, 0, 0) < 0)
die_errno("failed to read from stdin");
}
convert_to_git(path, buf.buf, buf.len, &buf, 0);
origin->file.ptr = buf.buf;
origin->file.size = buf.len;
pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_oid.hash);
/*
* Read the current index, replace the path entry with
* origin->blob_sha1 without mucking with its mode or type
* bits; we are not going to write this index out -- we just
* want to run "diff-index --cached".
*/
discard_cache();
read_cache();
len = strlen(path);
if (!mode) {
int pos = cache_name_pos(path, len);
if (0 <= pos)
mode = active_cache[pos]->ce_mode;
else
/* Let's not bother reading from HEAD tree */
mode = S_IFREG | 0644;
}
size = cache_entry_size(len);
ce = xcalloc(1, size);
oidcpy(&ce->oid, &origin->blob_oid);
memcpy(ce->name, path, len);
ce->ce_flags = create_ce_flags(0);
ce->ce_namelen = len;
ce->ce_mode = create_ce_mode(mode);
add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
cache_tree_invalidate_path(&the_index, path);
return commit;
}
