]>
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(void)
83 char *path
= git_pathdup("info/refs");
84 int ret
= update_info_file(path
, generate_info_refs
);
90 static struct pack_info
{
97 static struct pack_info
*find_pack_by_name(const char *name
)
100 for (i
= 0; i
< num_pack
; i
++) {
101 struct packed_git
*p
= info
[i
]->p
;
102 if (!strcmp(pack_basename(p
), name
))
108 /* Returns non-zero when we detect that the info in the
109 * old file is useless.
111 static int parse_pack_def(const char *packname
, int old_cnt
)
113 struct pack_info
*i
= find_pack_by_name(packname
);
115 i
->old_num
= old_cnt
;
119 /* The file describes a pack that is no longer here */
124 /* Returns non-zero when we detect that the info in the
125 * old file is useless.
127 static int read_pack_info_file(const char *infofile
)
130 struct strbuf line
= STRBUF_INIT
;
134 fp
= fopen_or_warn(infofile
, "r");
136 return 1; /* nonexistent is not an error. */
138 while (strbuf_getline(&line
, fp
) != EOF
) {
144 if (skip_prefix(line
.buf
, "P ", &arg
)) {
146 if (parse_pack_def(arg
, old_cnt
++))
148 } else if (line
.buf
[0] == 'D') {
149 /* we used to emit D but that was misguided. */
151 } else if (line
.buf
[0] == 'T') {
152 /* we used to emit T but nobody uses it. */
155 error("unrecognized: %s", line
.buf
);
161 strbuf_release(&line
);
166 static int compare_info(const void *a_
, const void *b_
)
168 struct pack_info
*const *a
= a_
;
169 struct pack_info
*const *b
= b_
;
171 if (0 <= (*a
)->old_num
&& 0 <= (*b
)->old_num
)
172 /* Keep the order in the original */
173 return (*a
)->old_num
- (*b
)->old_num
;
174 else if (0 <= (*a
)->old_num
)
175 /* Only A existed in the original so B is obviously newer */
177 else if (0 <= (*b
)->old_num
)
178 /* The other way around. */
181 /* then it does not matter but at least keep the comparison stable */
182 if ((*a
)->p
== (*b
)->p
)
184 else if ((*a
)->p
< (*b
)->p
)
190 static void init_pack_info(const char *infofile
, int force
)
192 struct packed_git
*p
;
196 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
197 /* we ignore things on alternate path since they are
198 * not available to the pullers in general.
205 info
= xcalloc(num_pack
, sizeof(struct pack_info
*));
206 for (i
= 0, p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
209 assert(i
< num_pack
);
210 info
[i
] = xcalloc(1, sizeof(struct pack_info
));
212 info
[i
]->old_num
= -1;
216 if (infofile
&& !force
)
217 stale
= read_pack_info_file(infofile
);
221 for (i
= 0; i
< num_pack
; i
++)
223 info
[i
]->old_num
= -1;
226 QSORT(info
, num_pack
, compare_info
);
227 for (i
= 0; i
< num_pack
; i
++)
228 info
[i
]->new_num
= i
;
231 static void free_pack_info(void)
234 for (i
= 0; i
< num_pack
; i
++)
239 static int write_pack_info_file(FILE *fp
)
242 for (i
= 0; i
< num_pack
; i
++) {
243 if (fprintf(fp
, "P %s\n", pack_basename(info
[i
]->p
)) < 0)
246 if (fputc('\n', fp
) == EOF
)
251 static int update_info_packs(int force
)
253 char *infofile
= mkpathdup("%s/info/packs", get_object_directory());
256 init_pack_info(infofile
, force
);
257 ret
= update_info_file(infofile
, write_pack_info_file
);
264 int update_server_info(int force
)
266 /* We would add more dumb-server support files later,
267 * including index of available pack files and their
268 * intended audiences.
272 errs
= errs
| update_info_refs();
273 errs
= errs
| update_info_packs(force
);
275 /* remove leftover rev-cache file if there is any */
276 unlink_or_warn(git_path("info/rev-cache"));