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#include "pull.h"
#include "cache.h"
#include "commit.h"
#include "tree.h"
#include "tag.h"
#include "blob.h"
#include "refs.h"
const char *write_ref = NULL;
const unsigned char *current_ref = NULL;
int get_tree = 0;
int get_history = 0;
int get_all = 0;
int get_verbosely = 0;
static unsigned char current_commit_sha1[20];
void pull_say(const char *fmt, const char *hex)
{
if (get_verbosely)
fprintf(stderr, fmt, hex);
}
static void report_missing(const char *what, const unsigned char *missing)
{
char missing_hex[41];
strcpy(missing_hex, sha1_to_hex(missing));;
fprintf(stderr,
"Cannot obtain needed %s %s\nwhile processing commit %s.\n",
what, missing_hex, sha1_to_hex(current_commit_sha1));
}
static int make_sure_we_have_it(const char *what, unsigned char *sha1)
{
int status = 0;
if (!has_sha1_file(sha1)) {
status = fetch(sha1);
if (status && what)
report_missing(what, sha1);
}
return status;
}
static int process(unsigned char *sha1, const char *type);
static int process_tree(struct tree *tree)
{
struct tree_entry_list *entries;
if (parse_tree(tree))
return -1;
for (entries = tree->entries; entries; entries = entries->next) {
if (process(entries->item.any->sha1,
entries->directory ? tree_type : blob_type))
return -1;
}
return 0;
}
static int process_commit(struct commit *commit)
{
if (parse_commit(commit))
return -1;
memcpy(current_commit_sha1, commit->object.sha1, 20);
if (get_tree) {
if (process(commit->tree->object.sha1, tree_type))
return -1;
if (!get_all)
get_tree = 0;
}
if (get_history) {
struct commit_list *parents = commit->parents;
for (; parents; parents = parents->next) {
if (has_sha1_file(parents->item->object.sha1))
continue;
if (process(parents->item->object.sha1,
commit_type))
return -1;
}
}
return 0;
}
static int process_tag(struct tag *tag)
{
if (parse_tag(tag))
return -1;
return process(tag->tagged->sha1, NULL);
}
static struct object_list *process_queue = NULL;
static struct object_list **process_queue_end = &process_queue;
static int process_object(struct object *obj)
{
if (obj->type == commit_type) {
if (process_commit((struct commit *)obj))
return -1;
return 0;
}
if (obj->type == tree_type) {
if (process_tree((struct tree *)obj))
return -1;
return 0;
}
if (obj->type == blob_type) {
return 0;
}
if (obj->type == tag_type) {
if (process_tag((struct tag *)obj))
return -1;
return 0;
}
return error("Unable to determine requirements "
"of type %s for %s",
obj->type, sha1_to_hex(obj->sha1));
}
static int process(unsigned char *sha1, const char *type)
{
struct object *obj = lookup_object_type(sha1, type);
if (has_sha1_file(sha1)) {
parse_object(sha1);
/* We already have it, so we should scan it now. */
return process_object(obj);
}
if (object_list_contains(process_queue, obj))
return 0;
object_list_insert(obj, process_queue_end);
process_queue_end = &(*process_queue_end)->next;
//fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1));
prefetch(sha1);
return 0;
}
static int loop(void)
{
while (process_queue) {
struct object *obj = process_queue->item;
/*
fprintf(stderr, "%d objects to pull\n",
object_list_length(process_queue));
*/
process_queue = process_queue->next;
if (!process_queue)
process_queue_end = &process_queue;
//fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1));
if (make_sure_we_have_it(obj->type ?: "object",
obj->sha1))
return -1;
if (!obj->type)
parse_object(obj->sha1);
if (process_object(obj))
return -1;
}
return 0;
}
static int interpret_target(char *target, unsigned char *sha1)
{
if (!get_sha1_hex(target, sha1))
return 0;
if (!check_ref_format(target)) {
if (!fetch_ref(target, sha1)) {
return 0;
}
}
return -1;
}
int pull(char *target)
{
unsigned char sha1[20];
int fd = -1;
if (write_ref && current_ref) {
fd = lock_ref_sha1(write_ref, current_ref);
if (fd < 0)
return -1;
}
if (interpret_target(target, sha1))
return error("Could not interpret %s as something to pull",
target);
if (process(sha1, NULL))
return -1;
if (loop())
return -1;
if (write_ref) {
if (current_ref) {
write_ref_sha1(write_ref, fd, sha1);
} else {
write_ref_sha1_unlocked(write_ref, sha1);
}
}
return 0;
}
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