10 const char *write_ref = NULL;
12 const unsigned char *current_ref = NULL;
16 /* 1 means "get delta", 2 means "really check delta harder */
19 int get_verbosely = 0;
20 static unsigned char current_commit_sha1[20];
22 static const char commitS[] = "commit";
23 static const char treeS[] = "tree";
24 static const char blobS[] = "blob";
26 void pull_say(const char *fmt, const char *hex) {
28 fprintf(stderr, fmt, hex);
31 static void report_missing(const char *what, const unsigned char *missing)
35 strcpy(missing_hex, sha1_to_hex(missing));;
37 "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
38 what, missing_hex, sha1_to_hex(current_commit_sha1));
41 static int make_sure_we_have_it(const char *what, unsigned char *sha1)
45 if (!has_sha1_file(sha1)) {
48 report_missing(what, sha1);
50 else if (get_delta < 2)
54 unsigned char delta_sha1[20];
55 status = sha1_delta_base(sha1, delta_sha1);
57 status = make_sure_we_have_it(what, delta_sha1);
62 static int process_unknown(unsigned char *sha1);
64 static int process_tree(unsigned char *sha1)
66 struct tree *tree = lookup_tree(sha1);
67 struct tree_entry_list *entries;
72 for (entries = tree->entries; entries; entries = entries->next) {
73 const char *what = entries->directory ? treeS : blobS;
74 if (make_sure_we_have_it(what, entries->item.tree->object.sha1))
76 if (entries->directory) {
77 if (process_tree(entries->item.tree->object.sha1))
84 static int process_commit(unsigned char *sha1)
86 struct commit *obj = lookup_commit(sha1);
88 if (make_sure_we_have_it(commitS, sha1))
91 if (parse_commit(obj))
95 if (make_sure_we_have_it(treeS, obj->tree->object.sha1))
97 if (process_tree(obj->tree->object.sha1))
103 struct commit_list *parents = obj->parents;
104 for (; parents; parents = parents->next) {
105 if (has_sha1_file(parents->item->object.sha1))
107 if (make_sure_we_have_it(NULL,
108 parents->item->object.sha1)) {
109 /* The server might not have it, and
114 if (process_commit(parents->item->object.sha1))
116 memcpy(current_commit_sha1, sha1, 20);
122 static int process_tag(unsigned char *sha1)
124 struct tag *obj = lookup_tag(sha1);
128 return process_unknown(obj->tagged->sha1);
131 static int process_unknown(unsigned char *sha1)
134 if (make_sure_we_have_it("object", sha1))
136 obj = parse_object(sha1);
138 return error("Unable to parse object %s", sha1_to_hex(sha1));
139 if (obj->type == commit_type)
140 return process_commit(sha1);
141 if (obj->type == tree_type)
142 return process_tree(sha1);
143 if (obj->type == blob_type)
145 if (obj->type == tag_type)
146 return process_tag(sha1);
147 return error("Unable to determine requirement of type %s for %s",
148 obj->type, sha1_to_hex(sha1));
151 static int interpret_target(char *target, unsigned char *sha1)
153 if (!get_sha1_hex(target, sha1))
155 if (!check_ref_format(target)) {
156 if (!fetch_ref(target, sha1)) {
164 int pull(char *target)
166 unsigned char sha1[20];
169 if (write_ref && current_ref) {
170 fd = lock_ref_sha1(write_ref, current_ref);
175 if (interpret_target(target, sha1))
176 return error("Could not interpret %s as something to pull",
178 if (process_unknown(sha1))
183 write_ref_sha1(write_ref, fd, sha1);
185 write_ref_sha1_unlocked(write_ref, sha1);