7e47ec0598359bfed39bbff0af2532b328f625f3
1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
4#include "cache.h"
5#include "commit.h"
6#include "pull.h"
7static int use_link = 0;
9static int use_symlink = 0;
10static int use_filecopy = 1;
11static char *path; /* "Remote" git repository */
13void prefetch(unsigned char *sha1)
15{
16}
17static struct packed_git *packs = NULL;
19void setup_index(unsigned char *sha1)
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}
32int setup_indices()
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);
41 while ((de = readdir(dir)) != NULL) {
42 int namelen = strlen(de->d_name);
43 if (namelen != 50 ||
44 strcmp(de->d_name + namelen - 5, ".pack"))
45 continue;
46 get_sha1_hex(sha1, de->d_name + 5);
47 setup_index(sha1);
48 }
49 return 0;
50}
51int copy_file(const char *source, const char *dest, const char *hex)
53{
54 if (use_link) {
55 if (!link(source, dest)) {
56 pull_say("link %s\n", hex);
57 return 0;
58 }
59 /* If we got ENOENT there is no point continuing. */
60 if (errno == ENOENT) {
61 fprintf(stderr, "does not exist %s\n", source);
62 return -1;
63 }
64 }
65 if (use_symlink && !symlink(source, dest)) {
66 pull_say("symlink %s\n", hex);
67 return 0;
68 }
69 if (use_filecopy) {
70 int ifd, ofd, status;
71 struct stat st;
72 void *map;
73 ifd = open(source, O_RDONLY);
74 if (ifd < 0 || fstat(ifd, &st) < 0) {
75 close(ifd);
76 fprintf(stderr, "cannot open %s\n", source);
77 return -1;
78 }
79 map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
80 close(ifd);
81 if (map == MAP_FAILED) {
82 fprintf(stderr, "cannot mmap %s\n", source);
83 return -1;
84 }
85 ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
86 status = ((ofd < 0) ||
87 (write(ofd, map, st.st_size) != st.st_size));
88 munmap(map, st.st_size);
89 close(ofd);
90 if (status)
91 fprintf(stderr, "cannot write %s\n", dest);
92 else
93 pull_say("copy %s\n", hex);
94 return status;
95 }
96 fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
97 return -1;
98}
99int fetch_pack(unsigned char *sha1)
101{
102 struct packed_git *target;
103 char filename[PATH_MAX];
104 if (setup_indices())
105 return -1;
106 target = find_sha1_pack(sha1, packs);
107 if (!target)
108 return error("Couldn't find %s: not separate or in any pack",
109 sha1_to_hex(sha1));
110 if (get_verbosely) {
111 fprintf(stderr, "Getting pack %s\n",
112 sha1_to_hex(target->sha1));
113 fprintf(stderr, " which contains %s\n",
114 sha1_to_hex(sha1));
115 }
116 sprintf(filename, "%s/objects/pack/pack-%s.pack",
117 path, sha1_to_hex(sha1));
118 copy_file(filename, sha1_pack_name(sha1), sha1_to_hex(sha1));
119 sprintf(filename, "%s/objects/pack/pack-%s.idx",
120 path, sha1_to_hex(sha1));
121 copy_file(filename, sha1_pack_index_name(sha1), sha1_to_hex(sha1));
122 install_packed_git(target);
123 return 0;
124}
125int fetch_file(unsigned char *sha1)
127{
128 static int object_name_start = -1;
129 static char filename[PATH_MAX];
130 char *hex = sha1_to_hex(sha1);
131 const char *dest_filename = sha1_file_name(sha1);
132 if (object_name_start < 0) {
134 strcpy(filename, path); /* e.g. git.git */
135 strcat(filename, "/objects/");
136 object_name_start = strlen(filename);
137 }
138 filename[object_name_start+0] = hex[0];
139 filename[object_name_start+1] = hex[1];
140 filename[object_name_start+2] = '/';
141 strcpy(filename + object_name_start + 3, hex + 2);
142 return copy_file(filename, dest_filename, hex);
143}
144int fetch(unsigned char *sha1)
146{
147 return fetch_file(sha1) && fetch_pack(sha1);
148}
149int fetch_ref(char *ref, unsigned char *sha1)
151{
152 static int ref_name_start = -1;
153 static char filename[PATH_MAX];
154 static char hex[41];
155 int ifd;
156 if (ref_name_start < 0) {
158 sprintf(filename, "%s/refs/", path);
159 ref_name_start = strlen(filename);
160 }
161 strcpy(filename + ref_name_start, ref);
162 ifd = open(filename, O_RDONLY);
163 if (ifd < 0) {
164 close(ifd);
165 fprintf(stderr, "cannot open %s\n", filename);
166 return -1;
167 }
168 if (read(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) {
169 close(ifd);
170 fprintf(stderr, "cannot read from %s\n", filename);
171 return -1;
172 }
173 close(ifd);
174 pull_say("ref %s\n", sha1_to_hex(sha1));
175 return 0;
176}
177static const char local_pull_usage[] =
179"git-local-pull [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
180/*
182 * By default we only use file copy.
183 * If -l is specified, a hard link is attempted.
184 * If -s is specified, then a symlink is attempted.
185 * If -n is _not_ specified, then a regular file-to-file copy is done.
186 */
187int main(int argc, char **argv)
188{
189 char *commit_id;
190 int arg = 1;
191 while (arg < argc && argv[arg][0] == '-') {
193 if (argv[arg][1] == 't')
194 get_tree = 1;
195 else if (argv[arg][1] == 'c')
196 get_history = 1;
197 else if (argv[arg][1] == 'a') {
198 get_all = 1;
199 get_tree = 1;
200 get_history = 1;
201 }
202 else if (argv[arg][1] == 'l')
203 use_link = 1;
204 else if (argv[arg][1] == 's')
205 use_symlink = 1;
206 else if (argv[arg][1] == 'n')
207 use_filecopy = 0;
208 else if (argv[arg][1] == 'v')
209 get_verbosely = 1;
210 else if (argv[arg][1] == 'w')
211 write_ref = argv[++arg];
212 else
213 usage(local_pull_usage);
214 arg++;
215 }
216 if (argc < arg + 2)
217 usage(local_pull_usage);
218 commit_id = argv[arg];
219 path = argv[arg + 1];
220 if (pull(commit_id))
222 return 1;
223 return 0;
225}