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c4584ae3fd
Packed delta files created by git-pack-objects seems to be the way to go, and existing "delta" object handling code has exposed the object representation details to too many places. Remove it while we refactor code to come up with a proper interface in sha1_file.c. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
178 lines
3.8 KiB
C
178 lines
3.8 KiB
C
#include "pull.h"
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#include "cache.h"
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#include "commit.h"
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#include "tree.h"
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#include "tag.h"
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#include "blob.h"
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#include "refs.h"
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const char *write_ref = NULL;
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const unsigned char *current_ref = NULL;
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int get_tree = 0;
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int get_history = 0;
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int get_all = 0;
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int get_verbosely = 0;
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static unsigned char current_commit_sha1[20];
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static const char commitS[] = "commit";
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static const char treeS[] = "tree";
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static const char blobS[] = "blob";
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void pull_say(const char *fmt, const char *hex) {
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if (get_verbosely)
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fprintf(stderr, fmt, hex);
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}
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static void report_missing(const char *what, const unsigned char *missing)
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{
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char missing_hex[41];
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strcpy(missing_hex, sha1_to_hex(missing));;
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fprintf(stderr,
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"Cannot obtain needed %s %s\nwhile processing commit %s.\n",
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what, missing_hex, sha1_to_hex(current_commit_sha1));
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}
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static int make_sure_we_have_it(const char *what, unsigned char *sha1)
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{
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int status = 0;
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if (!has_sha1_file(sha1)) {
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status = fetch(sha1);
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if (status && what)
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report_missing(what, sha1);
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}
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return status;
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}
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static int process_unknown(unsigned char *sha1);
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static int process_tree(unsigned char *sha1)
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{
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struct tree *tree = lookup_tree(sha1);
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struct tree_entry_list *entries;
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if (parse_tree(tree))
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return -1;
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for (entries = tree->entries; entries; entries = entries->next) {
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const char *what = entries->directory ? treeS : blobS;
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if (make_sure_we_have_it(what, entries->item.tree->object.sha1))
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return -1;
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if (entries->directory) {
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if (process_tree(entries->item.tree->object.sha1))
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return -1;
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}
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}
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return 0;
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}
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static int process_commit(unsigned char *sha1)
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{
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struct commit *obj = lookup_commit(sha1);
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if (make_sure_we_have_it(commitS, sha1))
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return -1;
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if (parse_commit(obj))
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return -1;
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if (get_tree) {
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if (make_sure_we_have_it(treeS, obj->tree->object.sha1))
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return -1;
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if (process_tree(obj->tree->object.sha1))
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return -1;
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if (!get_all)
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get_tree = 0;
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}
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if (get_history) {
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struct commit_list *parents = obj->parents;
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for (; parents; parents = parents->next) {
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if (has_sha1_file(parents->item->object.sha1))
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continue;
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if (make_sure_we_have_it(NULL,
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parents->item->object.sha1)) {
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/* The server might not have it, and
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* we don't mind.
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*/
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continue;
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}
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if (process_commit(parents->item->object.sha1))
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return -1;
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memcpy(current_commit_sha1, sha1, 20);
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}
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}
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return 0;
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}
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static int process_tag(unsigned char *sha1)
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{
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struct tag *obj = lookup_tag(sha1);
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if (parse_tag(obj))
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return -1;
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return process_unknown(obj->tagged->sha1);
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}
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static int process_unknown(unsigned char *sha1)
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{
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struct object *obj;
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if (make_sure_we_have_it("object", sha1))
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return -1;
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obj = parse_object(sha1);
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if (!obj)
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return error("Unable to parse object %s", sha1_to_hex(sha1));
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if (obj->type == commit_type)
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return process_commit(sha1);
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if (obj->type == tree_type)
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return process_tree(sha1);
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if (obj->type == blob_type)
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return 0;
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if (obj->type == tag_type)
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return process_tag(sha1);
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return error("Unable to determine requirement of type %s for %s",
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obj->type, sha1_to_hex(sha1));
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}
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static int interpret_target(char *target, unsigned char *sha1)
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{
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if (!get_sha1_hex(target, sha1))
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return 0;
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if (!check_ref_format(target)) {
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if (!fetch_ref(target, sha1)) {
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return 0;
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}
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}
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return -1;
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}
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int pull(char *target)
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{
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unsigned char sha1[20];
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int fd = -1;
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if (write_ref && current_ref) {
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fd = lock_ref_sha1(write_ref, current_ref);
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if (fd < 0)
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return -1;
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}
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if (interpret_target(target, sha1))
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return error("Could not interpret %s as something to pull",
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target);
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if (process_unknown(sha1))
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return -1;
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if (write_ref) {
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if (current_ref) {
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write_ref_sha1(write_ref, fd, sha1);
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} else {
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write_ref_sha1_unlocked(write_ref, sha1);
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}
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}
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return 0;
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}
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