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(oid
);
63 if (fprintf(fp
, "%s %s\n", oid_to_hex(oid
), path
) < 0)
66 if (o
->type
== OBJ_TAG
) {
67 o
= deref_tag(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
{
96 unsigned char (*head
)[20];
99 static const char *objdir
;
100 static int objdirlen
;
102 static struct pack_info
*find_pack_by_name(const char *name
)
105 for (i
= 0; i
< num_pack
; i
++) {
106 struct packed_git
*p
= info
[i
]->p
;
107 /* skip "/pack/" after ".git/objects" */
108 if (!strcmp(p
->pack_name
+ objdirlen
+ 6, name
))
114 /* Returns non-zero when we detect that the info in the
115 * old file is useless.
117 static int parse_pack_def(const char *line
, int old_cnt
)
119 struct pack_info
*i
= find_pack_by_name(line
+ 2);
121 i
->old_num
= old_cnt
;
125 /* The file describes a pack that is no longer here */
130 /* Returns non-zero when we detect that the info in the
131 * old file is useless.
133 static int read_pack_info_file(const char *infofile
)
139 fp
= fopen_or_warn(infofile
, "r");
141 return 1; /* nonexistent is not an error. */
143 while (fgets(line
, sizeof(line
), fp
)) {
144 int len
= strlen(line
);
145 if (len
&& line
[len
-1] == '\n')
152 case 'P': /* P name */
153 if (parse_pack_def(line
, old_cnt
++))
156 case 'D': /* we used to emit D but that was misguided. */
157 case 'T': /* we used to emit T but nobody uses it. */
160 error("unrecognized: %s", line
);
171 static int compare_info(const void *a_
, const void *b_
)
173 struct pack_info
*const *a
= a_
;
174 struct pack_info
*const *b
= b_
;
176 if (0 <= (*a
)->old_num
&& 0 <= (*b
)->old_num
)
177 /* Keep the order in the original */
178 return (*a
)->old_num
- (*b
)->old_num
;
179 else if (0 <= (*a
)->old_num
)
180 /* Only A existed in the original so B is obviously newer */
182 else if (0 <= (*b
)->old_num
)
183 /* The other way around. */
186 /* then it does not matter but at least keep the comparison stable */
187 if ((*a
)->p
== (*b
)->p
)
189 else if ((*a
)->p
< (*b
)->p
)
195 static void init_pack_info(const char *infofile
, int force
)
197 struct packed_git
*p
;
201 objdir
= get_object_directory();
202 objdirlen
= strlen(objdir
);
204 prepare_packed_git();
205 for (p
= get_packed_git(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_packed_git(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;
232 info
[i
]->nr_heads
= 0;
237 QSORT(info
, num_pack
, compare_info
);
238 for (i
= 0; i
< num_pack
; i
++)
239 info
[i
]->new_num
= i
;
242 static void free_pack_info(void)
245 for (i
= 0; i
< num_pack
; i
++)
250 static int write_pack_info_file(FILE *fp
)
253 for (i
= 0; i
< num_pack
; i
++) {
254 if (fprintf(fp
, "P %s\n", info
[i
]->p
->pack_name
+ objdirlen
+ 6) < 0)
257 if (fputc('\n', fp
) == EOF
)
262 static int update_info_packs(int force
)
264 char *infofile
= mkpathdup("%s/info/packs", get_object_directory());
267 init_pack_info(infofile
, force
);
268 ret
= update_info_file(infofile
, write_pack_info_file
);
275 int update_server_info(int force
)
277 /* We would add more dumb-server support files later,
278 * including index of available pack files and their
279 * intended audiences.
283 errs
= errs
| update_info_refs(force
);
284 errs
= errs
| update_info_packs(force
);
286 /* remove leftover rev-cache file if there is any */
287 unlink_or_warn(git_path("info/rev-cache"));