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chromium / external / github.com / git / git / refs/tags/v1.0.2 / . / local-fetch.c
blob: fa9e697fd3fa8fe305184f78fdf500532c14ab63 [file] [log] [blame]
Junio C Hamanob02a26c2005-05-02 04:10:04[diff] [blame]1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]4#include "cache.h"
5#include "commit.h"
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]6#include "fetch.h"
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]7
8static int use_link = 0;
9static int use_symlink = 0;
Junio C Hamanob02a26c2005-05-02 04:10:04[diff] [blame]10static int use_filecopy = 1;
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]11
Junio C Hamanof5ab6cc2005-06-22 08:52:06[diff] [blame]12static char *path; /* "Remote" git repository */
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]13
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]14void prefetch(unsigned char *sha1)
15{
16}
17
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]18static struct packed_git *packs = NULL;
19
Peter Hagervall2ab141a2005-09-02 12:17:10[diff] [blame]20static void setup_index(unsigned char *sha1)
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]21{
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;
30 packs = new_pack;
31}
32
Peter Hagervall2ab141a2005-09-02 12:17:10[diff] [blame]33static int setup_indices(void)
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]34{
35 DIR *dir;
36 struct dirent *de;
37 char filename[PATH_MAX];
38 unsigned char sha1[20];
39 sprintf(filename, "%s/objects/pack/", path);
40 dir = opendir(filename);
Sergey Vlasov8be707d2005-09-23 12:28:23[diff] [blame]41 if (!dir)
42 return -1;
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]43 while ((de = readdir(dir)) != NULL) {
44 int namelen = strlen(de->d_name);
45 if (namelen != 50 ||
46 strcmp(de->d_name + namelen - 5, ".pack"))
47 continue;
Junio C Hamanod9200322005-08-16 05:48:09[diff] [blame]48 get_sha1_hex(de->d_name + 5, sha1);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]49 setup_index(sha1);
50 }
Sergey Vlasov8be707d2005-09-23 12:28:23[diff] [blame]51 closedir(dir);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]52 return 0;
53}
54
Junio C Hamano0ffdbbf2005-10-29 20:02:18[diff] [blame]55static int copy_file(const char *source, char *dest, const char *hex,
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]56 int warn_if_not_exists)
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]57{
Junio C Hamano0ffdbbf2005-10-29 20:02:18[diff] [blame]58 safe_create_leading_directories(dest);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]59 if (use_link) {
60 if (!link(source, dest)) {
61 pull_say("link %s\n", hex);
62 return 0;
63 }
64 /* If we got ENOENT there is no point continuing. */
65 if (errno == ENOENT) {
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]66 if (warn_if_not_exists)
67 fprintf(stderr, "does not exist %s\n", source);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]68 return -1;
69 }
70 }
Sergey Vlasove2b77f02005-09-23 12:28:33[diff] [blame]71 if (use_symlink) {
72 struct stat st;
73 if (stat(source, &st)) {
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]74 if (!warn_if_not_exists && errno == ENOENT)
75 return -1;
Sergey Vlasove2b77f02005-09-23 12:28:33[diff] [blame]76 fprintf(stderr, "cannot stat %s: %s\n", source,
77 strerror(errno));
78 return -1;
79 }
80 if (!symlink(source, dest)) {
81 pull_say("symlink %s\n", hex);
82 return 0;
83 }
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]84 }
85 if (use_filecopy) {
Junio C Hamano52e44782005-10-29 20:11:36[diff] [blame]86 int ifd, ofd, status = 0;
87
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]88 ifd = open(source, O_RDONLY);
Junio C Hamano52e44782005-10-29 20:11:36[diff] [blame]89 if (ifd < 0) {
90 if (!warn_if_not_exists && errno == ENOENT)
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]91 return -1;
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]92 fprintf(stderr, "cannot open %s\n", source);
93 return -1;
94 }
Junio C Hamano52e44782005-10-29 20:11:36[diff] [blame]95 ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
96 if (ofd < 0) {
97 fprintf(stderr, "cannot open %s\n", dest);
98 close(ifd);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]99 return -1;
100 }
Junio C Hamano52e44782005-10-29 20:11:36[diff] [blame]101 status = copy_fd(ifd, ofd);
102 close(ofd);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]103 if (status)
104 fprintf(stderr, "cannot write %s\n", dest);
105 else
106 pull_say("copy %s\n", hex);
107 return status;
108 }
109 fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
110 return -1;
111}
112
Peter Hagervall2ab141a2005-09-02 12:17:10[diff] [blame]113static int fetch_pack(const unsigned char *sha1)
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]114{
115 struct packed_git *target;
116 char filename[PATH_MAX];
117 if (setup_indices())
118 return -1;
119 target = find_sha1_pack(sha1, packs);
120 if (!target)
121 return error("Couldn't find %s: not separate or in any pack",
122 sha1_to_hex(sha1));
123 if (get_verbosely) {
124 fprintf(stderr, "Getting pack %s\n",
125 sha1_to_hex(target->sha1));
126 fprintf(stderr, " which contains %s\n",
127 sha1_to_hex(sha1));
128 }
129 sprintf(filename, "%s/objects/pack/pack-%s.pack",
Junio C Hamanod9200322005-08-16 05:48:09[diff] [blame]130 path, sha1_to_hex(target->sha1));
131 copy_file(filename, sha1_pack_name(target->sha1),
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]132 sha1_to_hex(target->sha1), 1);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]133 sprintf(filename, "%s/objects/pack/pack-%s.idx",
Junio C Hamanod9200322005-08-16 05:48:09[diff] [blame]134 path, sha1_to_hex(target->sha1));
135 copy_file(filename, sha1_pack_index_name(target->sha1),
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]136 sha1_to_hex(target->sha1), 1);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]137 install_packed_git(target);
138 return 0;
139}
140
Peter Hagervall2ab141a2005-09-02 12:17:10[diff] [blame]141static int fetch_file(const unsigned char *sha1)
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]142{
143 static int object_name_start = -1;
144 static char filename[PATH_MAX];
145 char *hex = sha1_to_hex(sha1);
Junio C Hamano0ffdbbf2005-10-29 20:02:18[diff] [blame]146 char *dest_filename = sha1_file_name(sha1);
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]147
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]148 if (object_name_start < 0) {
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]149 strcpy(filename, path); /* e.g. git.git */
150 strcat(filename, "/objects/");
151 object_name_start = strlen(filename);
152 }
153 filename[object_name_start+0] = hex[0];
154 filename[object_name_start+1] = hex[1];
155 filename[object_name_start+2] = '/';
156 strcpy(filename + object_name_start + 3, hex + 2);
Sergey Vlasov628cd542005-09-23 12:28:38[diff] [blame]157 return copy_file(filename, dest_filename, hex, 0);
Daniel Barkalow08b11612005-08-16 04:10:32[diff] [blame]158}
159
160int fetch(unsigned char *sha1)
161{
Nick Hengeveld11f0daf2005-10-11 06:22:01[diff] [blame]162 if (has_sha1_file(sha1))
163 return 0;
164 else
165 return fetch_file(sha1) && fetch_pack(sha1);
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]166}
167
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]168int fetch_ref(char *ref, unsigned char *sha1)
169{
Junio C Hamanof5ab6cc2005-06-22 08:52:06[diff] [blame]170 static int ref_name_start = -1;
171 static char filename[PATH_MAX];
172 static char hex[41];
173 int ifd;
174
175 if (ref_name_start < 0) {
176 sprintf(filename, "%s/refs/", path);
177 ref_name_start = strlen(filename);
178 }
179 strcpy(filename + ref_name_start, ref);
180 ifd = open(filename, O_RDONLY);
181 if (ifd < 0) {
182 close(ifd);
183 fprintf(stderr, "cannot open %s\n", filename);
184 return -1;
185 }
186 if (read(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) {
187 close(ifd);
188 fprintf(stderr, "cannot read from %s\n", filename);
189 return -1;
190 }
191 close(ifd);
192 pull_say("ref %s\n", sha1_to_hex(sha1));
193 return 0;
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]194}
195
Petr Baudis4d1f1192005-07-29 09:01:26[diff] [blame]196static const char local_pull_usage[] =
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]197"git-local-fetch [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]198
Junio C Hamanob02a26c2005-05-02 04:10:04[diff] [blame]199/*
200 * By default we only use file copy.
201 * If -l is specified, a hard link is attempted.
202 * If -s is specified, then a symlink is attempted.
203 * If -n is _not_ specified, then a regular file-to-file copy is done.
204 */
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]205int main(int argc, char **argv)
206{
207 char *commit_id;
208 int arg = 1;
209
Junio C Hamano5a327712005-11-26 08:47:59[diff] [blame]210 setup_git_directory();
211
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]212 while (arg < argc && argv[arg][0] == '-') {
213 if (argv[arg][1] == 't')
214 get_tree = 1;
215 else if (argv[arg][1] == 'c')
216 get_history = 1;
217 else if (argv[arg][1] == 'a') {
218 get_all = 1;
219 get_tree = 1;
220 get_history = 1;
221 }
222 else if (argv[arg][1] == 'l')
223 use_link = 1;
224 else if (argv[arg][1] == 's')
225 use_symlink = 1;
Junio C Hamanob02a26c2005-05-02 04:10:04[diff] [blame]226 else if (argv[arg][1] == 'n')
227 use_filecopy = 0;
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]228 else if (argv[arg][1] == 'v')
Junio C Hamanoe78d9772005-05-06 08:37:21[diff] [blame]229 get_verbosely = 1;
Junio C Hamanof5ab6cc2005-06-22 08:52:06[diff] [blame]230 else if (argv[arg][1] == 'w')
231 write_ref = argv[++arg];
Daniel Barkalow820eca62005-09-27 01:38:08[diff] [blame]232 else if (!strcmp(argv[arg], "--recover"))
233 get_recover = 1;
Junio C Hamanodfcb4052005-05-02 04:09:28[diff] [blame]234 else
235 usage(local_pull_usage);
236 arg++;
237 }
238 if (argc < arg + 2)
239 usage(local_pull_usage);
240 commit_id = argv[arg];
241 path = argv[arg + 1];
242
243 if (pull(commit_id))
244 return 1;
245
246 return 0;
247}