2 #include "repository.h"
8 #include "object-store.h"
11 * Create the file "path" by writing to a temporary file and renaming
12 * it into place. The contents of the file come from "generate", which
13 * should return non-zero if it encounters an error.
15 static int update_info_file(char *path, int (*generate)(FILE *))
17 char *tmp = mkpathdup("%s_XXXXXX", path);
20 FILE *fp = NULL, *to_close;
22 safe_create_leading_directories(path);
23 fd = git_mkstemp_mode(tmp, 0666);
26 to_close = fp = fdopen(fd, "w");
36 if (adjust_shared_perm(tmp) < 0)
38 if (rename(tmp, path) < 0)
44 error_errno("unable to update %s", path);
55 static int add_info_ref(const char *path, const struct object_id *oid,
56 int flag, void *cb_data)
59 struct object *o = parse_object(the_repository, oid);
63 if (fprintf(fp, "%s %s\n", oid_to_hex(oid), path) < 0)
66 if (o->type == OBJ_TAG) {
67 o = deref_tag(the_repository, o, path, 0);
69 if (fprintf(fp, "%s %s^{}\n",
70 oid_to_hex(&o->oid), path) < 0)
76 static int generate_info_refs(FILE *fp)
78 return for_each_ref(add_info_ref, fp);
81 static int update_info_refs(int force)
83 char *path = git_pathdup("info/refs");
84 int ret = update_info_file(path, generate_info_refs);
90 static struct pack_info {
97 static const char *objdir;
100 static struct pack_info *find_pack_by_name(const char *name)
103 for (i = 0; i < num_pack; i++) {
104 struct packed_git *p = info[i]->p;
105 /* skip "/pack/" after ".git/objects" */
106 if (!strcmp(p->pack_name + objdirlen + 6, name))
112 /* Returns non-zero when we detect that the info in the
113 * old file is useless.
115 static int parse_pack_def(const char *packname, int old_cnt)
117 struct pack_info *i = find_pack_by_name(packname);
119 i->old_num = old_cnt;
123 /* The file describes a pack that is no longer here */
128 /* Returns non-zero when we detect that the info in the
129 * old file is useless.
131 static int read_pack_info_file(const char *infofile)
138 fp = fopen_or_warn(infofile, "r");
140 return 1; /* nonexistent is not an error. */
142 while (fgets(line, sizeof(line), fp)) {
144 int len = strlen(line);
145 if (len && line[len-1] == '\n')
151 if (skip_prefix(line, "P ", &arg)) {
153 if (parse_pack_def(arg, old_cnt++))
155 } else if (line[0] == 'D') {
156 /* we used to emit D but that was misguided. */
158 } else if (line[0] == 'T') {
159 /* we used to emit T but nobody uses it. */
162 error("unrecognized: %s", line);
172 static int compare_info(const void *a_, const void *b_)
174 struct pack_info *const *a = a_;
175 struct pack_info *const *b = b_;
177 if (0 <= (*a)->old_num && 0 <= (*b)->old_num)
178 /* Keep the order in the original */
179 return (*a)->old_num - (*b)->old_num;
180 else if (0 <= (*a)->old_num)
181 /* Only A existed in the original so B is obviously newer */
183 else if (0 <= (*b)->old_num)
184 /* The other way around. */
187 /* then it does not matter but at least keep the comparison stable */
188 if ((*a)->p == (*b)->p)
190 else if ((*a)->p < (*b)->p)
196 static void init_pack_info(const char *infofile, int force)
198 struct packed_git *p;
202 objdir = get_object_directory();
203 objdirlen = strlen(objdir);
205 for (p = get_all_packs(the_repository); p; p = p->next) {
206 /* we ignore things on alternate path since they are
207 * not available to the pullers in general.
214 info = xcalloc(num_pack, sizeof(struct pack_info *));
215 for (i = 0, p = get_all_packs(the_repository); p; p = p->next) {
218 info[i] = xcalloc(1, sizeof(struct pack_info));
220 info[i]->old_num = -1;
224 if (infofile && !force)
225 stale = read_pack_info_file(infofile);
229 for (i = 0; i < num_pack; i++)
231 info[i]->old_num = -1;
234 QSORT(info, num_pack, compare_info);
235 for (i = 0; i < num_pack; i++)
236 info[i]->new_num = i;
239 static void free_pack_info(void)
242 for (i = 0; i < num_pack; i++)
247 static int write_pack_info_file(FILE *fp)
250 for (i = 0; i < num_pack; i++) {
251 if (fprintf(fp, "P %s\n", info[i]->p->pack_name + objdirlen + 6) < 0)
254 if (fputc('\n', fp) == EOF)
259 static int update_info_packs(int force)
261 char *infofile = mkpathdup("%s/info/packs", get_object_directory());
264 init_pack_info(infofile, force);
265 ret = update_info_file(infofile, write_pack_info_file);
272 int update_server_info(int force)
274 /* We would add more dumb-server support files later,
275 * including index of available pack files and their
276 * intended audiences.
280 errs = errs | update_info_refs(force);
281 errs = errs | update_info_packs(force);
283 /* remove leftover rev-cache file if there is any */
284 unlink_or_warn(git_path("info/rev-cache"));