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git.ipfire.org Git - thirdparty/git.git/blob - server-info.c
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
)
134 struct strbuf line
= STRBUF_INIT
;
138 fp
= fopen_or_warn(infofile
, "r");
140 return 1; /* nonexistent is not an error. */
142 while (strbuf_getline(&line
, fp
) != EOF
) {
148 if (skip_prefix(line
.buf
, "P ", &arg
)) {
150 if (parse_pack_def(arg
, old_cnt
++))
152 } else if (line
.buf
[0] == 'D') {
153 /* we used to emit D but that was misguided. */
155 } else if (line
.buf
[0] == 'T') {
156 /* we used to emit T but nobody uses it. */
159 error("unrecognized: %s", line
.buf
);
165 strbuf_release(&line
);
170 static int compare_info(const void *a_
, const void *b_
)
172 struct pack_info
*const *a
= a_
;
173 struct pack_info
*const *b
= b_
;
175 if (0 <= (*a
)->old_num
&& 0 <= (*b
)->old_num
)
176 /* Keep the order in the original */
177 return (*a
)->old_num
- (*b
)->old_num
;
178 else if (0 <= (*a
)->old_num
)
179 /* Only A existed in the original so B is obviously newer */
181 else if (0 <= (*b
)->old_num
)
182 /* The other way around. */
185 /* then it does not matter but at least keep the comparison stable */
186 if ((*a
)->p
== (*b
)->p
)
188 else if ((*a
)->p
< (*b
)->p
)
194 static void init_pack_info(const char *infofile
, int force
)
196 struct packed_git
*p
;
200 objdir
= get_object_directory();
201 objdirlen
= strlen(objdir
);
203 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
204 /* we ignore things on alternate path since they are
205 * not available to the pullers in general.
212 info
= xcalloc(num_pack
, sizeof(struct pack_info
*));
213 for (i
= 0, p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
216 info
[i
] = xcalloc(1, sizeof(struct pack_info
));
218 info
[i
]->old_num
= -1;
222 if (infofile
&& !force
)
223 stale
= read_pack_info_file(infofile
);
227 for (i
= 0; i
< num_pack
; i
++)
229 info
[i
]->old_num
= -1;
232 QSORT(info
, num_pack
, compare_info
);
233 for (i
= 0; i
< num_pack
; i
++)
234 info
[i
]->new_num
= i
;
237 static void free_pack_info(void)
240 for (i
= 0; i
< num_pack
; i
++)
245 static int write_pack_info_file(FILE *fp
)
248 for (i
= 0; i
< num_pack
; i
++) {
249 if (fprintf(fp
, "P %s\n", info
[i
]->p
->pack_name
+ objdirlen
+ 6) < 0)
252 if (fputc('\n', fp
) == EOF
)
257 static int update_info_packs(int force
)
259 char *infofile
= mkpathdup("%s/info/packs", get_object_directory());
262 init_pack_info(infofile
, force
);
263 ret
= update_info_file(infofile
, write_pack_info_file
);
270 int update_server_info(int force
)
272 /* We would add more dumb-server support files later,
273 * including index of available pack files and their
274 * intended audiences.
278 errs
= errs
| update_info_refs(force
);
279 errs
= errs
| update_info_packs(force
);
281 /* remove leftover rev-cache file if there is any */
282 unlink_or_warn(git_path("info/rev-cache"));