Log ref updates made by fetch.
[git/git.git] / local-fetch.c
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b02a26cb
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1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
dfcb4057
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4#include "cache.h"
5#include "commit.h"
215a7ad1 6#include "fetch.h"
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7
8static int use_link = 0;
9static int use_symlink = 0;
b02a26cb 10static int use_filecopy = 1;
dfcb4057 11
f5ab6cca 12static char *path; /* "Remote" git repository */
dfcb4057 13
1e8be59d
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14void prefetch(unsigned char *sha1)
15{
16}
17
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18static struct packed_git *packs = NULL;
19
2ab141a2 20static void setup_index(unsigned char *sha1)
dfcb4057 21{
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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}
dfcb4057 32
2ab141a2 33static int setup_indices(void)
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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);
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41 if (!dir)
42 return -1;
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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;
d9200320 48 get_sha1_hex(de->d_name + 5, sha1);
08b11616 49 setup_index(sha1);
dfcb4057 50 }
8be707de 51 closedir(dir);
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52 return 0;
53}
54
0ffdbbfe 55static int copy_file(const char *source, char *dest, const char *hex,
628cd543 56 int warn_if_not_exists)
08b11616 57{
0ffdbbfe 58 safe_create_leading_directories(dest);
fd0ffd3a 59 if (use_link) {
08b11616 60 if (!link(source, dest)) {
e78d9772 61 pull_say("link %s\n", hex);
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62 return 0;
63 }
64 /* If we got ENOENT there is no point continuing. */
65 if (errno == ENOENT) {
628cd543
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66 if (warn_if_not_exists)
67 fprintf(stderr, "does not exist %s\n", source);
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68 return -1;
69 }
dfcb4057 70 }
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71 if (use_symlink) {
72 struct stat st;
73 if (stat(source, &st)) {
628cd543
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74 if (!warn_if_not_exists && errno == ENOENT)
75 return -1;
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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 }
dfcb4057 84 }
b02a26cb 85 if (use_filecopy) {
52e4478d
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86 int ifd, ofd, status = 0;
87
08b11616 88 ifd = open(source, O_RDONLY);
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89 if (ifd < 0) {
90 if (!warn_if_not_exists && errno == ENOENT)
628cd543 91 return -1;
08b11616 92 fprintf(stderr, "cannot open %s\n", source);
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93 return -1;
94 }
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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);
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99 return -1;
100 }
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101 status = copy_fd(ifd, ofd);
102 close(ofd);
b02a26cb 103 if (status)
08b11616 104 fprintf(stderr, "cannot write %s\n", dest);
b02a26cb 105 else
e78d9772 106 pull_say("copy %s\n", hex);
b02a26cb 107 return status;
dfcb4057 108 }
fd0ffd3a 109 fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
b02a26cb 110 return -1;
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111}
112
2ab141a2 113static int fetch_pack(const unsigned char *sha1)
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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",
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130 path, sha1_to_hex(target->sha1));
131 copy_file(filename, sha1_pack_name(target->sha1),
628cd543 132 sha1_to_hex(target->sha1), 1);
08b11616 133 sprintf(filename, "%s/objects/pack/pack-%s.idx",
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134 path, sha1_to_hex(target->sha1));
135 copy_file(filename, sha1_pack_index_name(target->sha1),
628cd543 136 sha1_to_hex(target->sha1), 1);
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137 install_packed_git(target);
138 return 0;
139}
140
2ab141a2 141static int fetch_file(const unsigned char *sha1)
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142{
143 static int object_name_start = -1;
144 static char filename[PATH_MAX];
145 char *hex = sha1_to_hex(sha1);
0ffdbbfe 146 char *dest_filename = sha1_file_name(sha1);
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147
148 if (object_name_start < 0) {
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);
628cd543 157 return copy_file(filename, dest_filename, hex, 0);
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158}
159
160int fetch(unsigned char *sha1)
161{
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162 if (has_sha1_file(sha1))
163 return 0;
164 else
165 return fetch_file(sha1) && fetch_pack(sha1);
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166}
167
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168int fetch_ref(char *ref, unsigned char *sha1)
169{
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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;
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194}
195
4d1f1190 196static const char local_pull_usage[] =
215a7ad1 197"git-local-fetch [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
dfcb4057 198
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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 */
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205int main(int argc, char **argv)
206{
207 char *commit_id;
208 int arg = 1;
209
5a327713 210 setup_git_directory();
d0740d92 211 git_config(git_default_config);
5a327713 212
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213 while (arg < argc && argv[arg][0] == '-') {
214 if (argv[arg][1] == 't')
215 get_tree = 1;
216 else if (argv[arg][1] == 'c')
217 get_history = 1;
218 else if (argv[arg][1] == 'a') {
219 get_all = 1;
220 get_tree = 1;
221 get_history = 1;
222 }
223 else if (argv[arg][1] == 'l')
224 use_link = 1;
225 else if (argv[arg][1] == 's')
226 use_symlink = 1;
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227 else if (argv[arg][1] == 'n')
228 use_filecopy = 0;
dfcb4057 229 else if (argv[arg][1] == 'v')
e78d9772 230 get_verbosely = 1;
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231 else if (argv[arg][1] == 'w')
232 write_ref = argv[++arg];
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233 else if (!strcmp(argv[arg], "--recover"))
234 get_recover = 1;
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235 else
236 usage(local_pull_usage);
237 arg++;
238 }
239 if (argc < arg + 2)
240 usage(local_pull_usage);
241 commit_id = argv[arg];
242 path = argv[arg + 1];
d0740d92 243 write_ref_log_details = path;
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244
245 if (pull(commit_id))
246 return 1;
247
248 return 0;
249}