]>
git.ipfire.org Git - thirdparty/git.git/blob - local-fetch.c
2 * Copyright (C) 2005 Junio C Hamano
8 static int use_link
= 0;
9 static int use_symlink
= 0;
10 static int use_filecopy
= 1;
12 static char *path
; /* "Remote" git repository */
14 void prefetch(unsigned char *sha1
)
18 static struct packed_git
*packs
= NULL
;
20 static void setup_index(unsigned char *sha1
)
22 struct packed_git
*new_pack
;
23 char filename
[PATH_MAX
];
24 strcpy(filename
, path
);
25 strcat(filename
, "/objects/pack/pack-");
26 strcat(filename
, sha1_to_hex(sha1
));
27 strcat(filename
, ".idx");
28 new_pack
= parse_pack_index_file(sha1
, filename
);
29 new_pack
->next
= packs
;
33 static int setup_indices(void)
37 char filename
[PATH_MAX
];
38 unsigned char sha1
[20];
39 sprintf(filename
, "%s/objects/pack/", path
);
40 dir
= opendir(filename
);
43 while ((de
= readdir(dir
)) != NULL
) {
44 int namelen
= strlen(de
->d_name
);
46 strcmp(de
->d_name
+ namelen
- 5, ".pack"))
48 get_sha1_hex(de
->d_name
+ 5, sha1
);
55 static int copy_file(const char *source
, char *dest
, const char *hex
,
56 int warn_if_not_exists
)
58 safe_create_leading_directories(dest
);
60 if (!link(source
, dest
)) {
61 pull_say("link %s\n", hex
);
64 /* If we got ENOENT there is no point continuing. */
65 if (errno
== ENOENT
) {
66 if (warn_if_not_exists
)
67 fprintf(stderr
, "does not exist %s\n", source
);
73 if (stat(source
, &st
)) {
74 if (!warn_if_not_exists
&& errno
== ENOENT
)
76 fprintf(stderr
, "cannot stat %s: %s\n", source
,
80 if (!symlink(source
, dest
)) {
81 pull_say("symlink %s\n", hex
);
89 ifd
= open(source
, O_RDONLY
);
90 if (ifd
< 0 || fstat(ifd
, &st
) < 0) {
94 if (!warn_if_not_exists
&& err
== ENOENT
)
96 fprintf(stderr
, "cannot open %s\n", source
);
99 map
= mmap(NULL
, st
.st_size
, PROT_READ
, MAP_PRIVATE
, ifd
, 0);
101 if (map
== MAP_FAILED
) {
102 fprintf(stderr
, "cannot mmap %s\n", source
);
105 ofd
= open(dest
, O_WRONLY
| O_CREAT
| O_EXCL
, 0666);
106 status
= ((ofd
< 0) ||
107 (write(ofd
, map
, st
.st_size
) != st
.st_size
));
108 munmap(map
, st
.st_size
);
112 fprintf(stderr
, "cannot write %s\n", dest
);
114 pull_say("copy %s\n", hex
);
117 fprintf(stderr
, "failed to copy %s with given copy methods.\n", hex
);
121 static int fetch_pack(const unsigned char *sha1
)
123 struct packed_git
*target
;
124 char filename
[PATH_MAX
];
127 target
= find_sha1_pack(sha1
, packs
);
129 return error("Couldn't find %s: not separate or in any pack",
132 fprintf(stderr
, "Getting pack %s\n",
133 sha1_to_hex(target
->sha1
));
134 fprintf(stderr
, " which contains %s\n",
137 sprintf(filename
, "%s/objects/pack/pack-%s.pack",
138 path
, sha1_to_hex(target
->sha1
));
139 copy_file(filename
, sha1_pack_name(target
->sha1
),
140 sha1_to_hex(target
->sha1
), 1);
141 sprintf(filename
, "%s/objects/pack/pack-%s.idx",
142 path
, sha1_to_hex(target
->sha1
));
143 copy_file(filename
, sha1_pack_index_name(target
->sha1
),
144 sha1_to_hex(target
->sha1
), 1);
145 install_packed_git(target
);
149 static int fetch_file(const unsigned char *sha1
)
151 static int object_name_start
= -1;
152 static char filename
[PATH_MAX
];
153 char *hex
= sha1_to_hex(sha1
);
154 char *dest_filename
= sha1_file_name(sha1
);
156 if (object_name_start
< 0) {
157 strcpy(filename
, path
); /* e.g. git.git */
158 strcat(filename
, "/objects/");
159 object_name_start
= strlen(filename
);
161 filename
[object_name_start
+0] = hex
[0];
162 filename
[object_name_start
+1] = hex
[1];
163 filename
[object_name_start
+2] = '/';
164 strcpy(filename
+ object_name_start
+ 3, hex
+ 2);
165 return copy_file(filename
, dest_filename
, hex
, 0);
168 int fetch(unsigned char *sha1
)
170 if (has_sha1_file(sha1
))
173 return fetch_file(sha1
) && fetch_pack(sha1
);
176 int fetch_ref(char *ref
, unsigned char *sha1
)
178 static int ref_name_start
= -1;
179 static char filename
[PATH_MAX
];
183 if (ref_name_start
< 0) {
184 sprintf(filename
, "%s/refs/", path
);
185 ref_name_start
= strlen(filename
);
187 strcpy(filename
+ ref_name_start
, ref
);
188 ifd
= open(filename
, O_RDONLY
);
191 fprintf(stderr
, "cannot open %s\n", filename
);
194 if (read(ifd
, hex
, 40) != 40 || get_sha1_hex(hex
, sha1
)) {
196 fprintf(stderr
, "cannot read from %s\n", filename
);
200 pull_say("ref %s\n", sha1_to_hex(sha1
));
204 static const char local_pull_usage
[] =
205 "git-local-fetch [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
208 * By default we only use file copy.
209 * If -l is specified, a hard link is attempted.
210 * If -s is specified, then a symlink is attempted.
211 * If -n is _not_ specified, then a regular file-to-file copy is done.
213 int main(int argc
, char **argv
)
218 while (arg
< argc
&& argv
[arg
][0] == '-') {
219 if (argv
[arg
][1] == 't')
221 else if (argv
[arg
][1] == 'c')
223 else if (argv
[arg
][1] == 'a') {
228 else if (argv
[arg
][1] == 'l')
230 else if (argv
[arg
][1] == 's')
232 else if (argv
[arg
][1] == 'n')
234 else if (argv
[arg
][1] == 'v')
236 else if (argv
[arg
][1] == 'w')
237 write_ref
= argv
[++arg
];
238 else if (!strcmp(argv
[arg
], "--recover"))
241 usage(local_pull_usage
);
245 usage(local_pull_usage
);
246 commit_id
= argv
[arg
];
247 path
= argv
[arg
+ 1];