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4df096a5 FBH |
1 | /* |
2 | * Copyright (c) 2006 Franck Bui-Huu | |
3 | * Copyright (c) 2006 Rene Scharfe | |
4 | */ | |
5 | #include <time.h> | |
6 | #include "cache.h" | |
7 | #include "builtin.h" | |
8 | #include "archive.h" | |
9 | #include "commit.h" | |
10 | #include "tree-walk.h" | |
11 | #include "exec_cmd.h" | |
12 | #include "pkt-line.h" | |
13 | ||
14 | static const char archive_usage[] = \ | |
15 | "git-archive --format=<fmt> [--prefix=<prefix>/] [<extra>] <tree-ish> [path...]"; | |
16 | ||
17 | struct archiver archivers[] = { | |
854c4168 RS |
18 | { |
19 | .name = "tar", | |
20 | .write_archive = write_tar_archive, | |
21 | }, | |
22 | { | |
23 | .name = "zip", | |
24 | .write_archive = write_zip_archive, | |
25 | .parse_extra = parse_extra_zip_args, | |
26 | }, | |
4df096a5 FBH |
27 | }; |
28 | ||
37f94436 | 29 | static int run_remote_archiver(const char *remote, int argc, |
4df096a5 FBH |
30 | const char **argv) |
31 | { | |
32 | char *url, buf[1024]; | |
33 | int fd[2], i, len, rv; | |
34 | pid_t pid; | |
35 | ||
36 | sprintf(buf, "git-upload-archive"); | |
37 | ||
37f94436 | 38 | url = xstrdup(remote); |
4df096a5 FBH |
39 | pid = git_connect(fd, url, buf); |
40 | if (pid < 0) | |
41 | return pid; | |
42 | ||
37f94436 | 43 | for (i = 1; i < argc; i++) |
4df096a5 | 44 | packet_write(fd[1], "argument %s\n", argv[i]); |
4df096a5 FBH |
45 | packet_flush(fd[1]); |
46 | ||
47 | len = packet_read_line(fd[0], buf, sizeof(buf)); | |
48 | if (!len) | |
49 | die("git-archive: expected ACK/NAK, got EOF"); | |
50 | if (buf[len-1] == '\n') | |
51 | buf[--len] = 0; | |
52 | if (strcmp(buf, "ACK")) { | |
53 | if (len > 5 && !strncmp(buf, "NACK ", 5)) | |
54 | die("git-archive: NACK %s", buf + 5); | |
55 | die("git-archive: protocol error"); | |
56 | } | |
57 | ||
58 | len = packet_read_line(fd[0], buf, sizeof(buf)); | |
59 | if (len) | |
60 | die("git-archive: expected a flush"); | |
61 | ||
62 | /* Now, start reading from fd[0] and spit it out to stdout */ | |
63 | rv = copy_fd(fd[0], 1); | |
64 | ||
65 | close(fd[0]); | |
66 | rv |= finish_connect(pid); | |
67 | ||
68 | return !!rv; | |
69 | } | |
70 | ||
71 | static int init_archiver(const char *name, struct archiver *ar) | |
72 | { | |
73 | int rv = -1, i; | |
74 | ||
75 | for (i = 0; i < ARRAY_SIZE(archivers); i++) { | |
76 | if (!strcmp(name, archivers[i].name)) { | |
77 | memcpy(ar, &archivers[i], sizeof(struct archiver)); | |
78 | rv = 0; | |
79 | break; | |
80 | } | |
81 | } | |
82 | return rv; | |
83 | } | |
84 | ||
85 | void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args) | |
86 | { | |
87 | ar_args->pathspec = get_pathspec(ar_args->base, pathspec); | |
88 | } | |
89 | ||
90 | void parse_treeish_arg(const char **argv, struct archiver_args *ar_args, | |
91 | const char *prefix) | |
92 | { | |
93 | const char *name = argv[0]; | |
94 | const unsigned char *commit_sha1; | |
95 | time_t archive_time; | |
96 | struct tree *tree; | |
97 | struct commit *commit; | |
98 | unsigned char sha1[20]; | |
99 | ||
100 | if (get_sha1(name, sha1)) | |
101 | die("Not a valid object name"); | |
102 | ||
103 | commit = lookup_commit_reference_gently(sha1, 1); | |
104 | if (commit) { | |
105 | commit_sha1 = commit->object.sha1; | |
106 | archive_time = commit->date; | |
107 | } else { | |
108 | commit_sha1 = NULL; | |
109 | archive_time = time(NULL); | |
110 | } | |
111 | ||
112 | tree = parse_tree_indirect(sha1); | |
113 | if (tree == NULL) | |
114 | die("not a tree object"); | |
115 | ||
116 | if (prefix) { | |
117 | unsigned char tree_sha1[20]; | |
118 | unsigned int mode; | |
119 | int err; | |
120 | ||
121 | err = get_tree_entry(tree->object.sha1, prefix, | |
122 | tree_sha1, &mode); | |
123 | if (err || !S_ISDIR(mode)) | |
124 | die("current working directory is untracked"); | |
125 | ||
126 | free(tree); | |
127 | tree = parse_tree_indirect(tree_sha1); | |
128 | } | |
129 | ar_args->tree = tree; | |
130 | ar_args->commit_sha1 = commit_sha1; | |
131 | ar_args->time = archive_time; | |
132 | } | |
133 | ||
134 | static const char *default_parse_extra(struct archiver *ar, | |
135 | const char **argv) | |
136 | { | |
137 | static char msg[64]; | |
138 | ||
139 | snprintf(msg, sizeof(msg) - 4, "'%s' format does not handle %s", | |
140 | ar->name, *argv); | |
141 | ||
142 | return strcat(msg, "..."); | |
143 | } | |
144 | ||
145 | int parse_archive_args(int argc, const char **argv, struct archiver *ar) | |
146 | { | |
147 | const char *extra_argv[MAX_EXTRA_ARGS]; | |
148 | int extra_argc = 0; | |
149 | const char *format = NULL; /* might want to default to "tar" */ | |
4df096a5 | 150 | const char *base = ""; |
4df096a5 FBH |
151 | int i; |
152 | ||
153 | for (i = 1; i < argc; i++) { | |
154 | const char *arg = argv[i]; | |
155 | ||
156 | if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) { | |
37f94436 JH |
157 | for (i = 0; i < ARRAY_SIZE(archivers); i++) |
158 | printf("%s\n", archivers[i].name); | |
159 | exit(0); | |
4df096a5 FBH |
160 | } |
161 | if (!strncmp(arg, "--format=", 9)) { | |
162 | format = arg + 9; | |
163 | continue; | |
164 | } | |
165 | if (!strncmp(arg, "--prefix=", 9)) { | |
166 | base = arg + 9; | |
167 | continue; | |
168 | } | |
4df096a5 FBH |
169 | if (!strcmp(arg, "--")) { |
170 | i++; | |
171 | break; | |
172 | } | |
173 | if (arg[0] == '-') { | |
174 | if (extra_argc > MAX_EXTRA_ARGS - 1) | |
175 | die("Too many extra options"); | |
176 | extra_argv[extra_argc++] = arg; | |
177 | continue; | |
178 | } | |
179 | break; | |
180 | } | |
181 | ||
37f94436 JH |
182 | /* We need at least one parameter -- tree-ish */ |
183 | if (argc - 1 < i) | |
4df096a5 FBH |
184 | usage(archive_usage); |
185 | if (!format) | |
186 | die("You must specify an archive format"); | |
187 | if (init_archiver(format, ar) < 0) | |
188 | die("Unknown archive format '%s'", format); | |
189 | ||
37f94436 JH |
190 | if (extra_argc) { |
191 | if (!ar->parse_extra) | |
4df096a5 | 192 | die("%s", default_parse_extra(ar, extra_argv)); |
4df096a5 FBH |
193 | ar->args.extra = ar->parse_extra(extra_argc, extra_argv); |
194 | } | |
4df096a5 FBH |
195 | ar->args.base = base; |
196 | ||
197 | return i; | |
198 | } | |
199 | ||
37f94436 JH |
200 | static const char *remote_request(int *ac, const char **av) |
201 | { | |
202 | int ix, iy, cnt = *ac; | |
203 | int no_more_options = 0; | |
204 | const char *remote = NULL; | |
205 | ||
206 | for (ix = iy = 1; ix < cnt; ix++) { | |
207 | const char *arg = av[ix]; | |
208 | if (!strcmp(arg, "--")) | |
209 | no_more_options = 1; | |
210 | if (!no_more_options) { | |
211 | if (!strncmp(arg, "--remote=", 9)) { | |
212 | if (remote) | |
213 | die("Multiple --remote specified"); | |
214 | remote = arg + 9; | |
215 | continue; | |
216 | } | |
217 | if (arg[0] != '-') | |
218 | no_more_options = 1; | |
219 | } | |
220 | if (ix != iy) | |
221 | av[iy] = arg; | |
222 | iy++; | |
223 | } | |
224 | if (remote) { | |
225 | av[--cnt] = NULL; | |
226 | *ac = cnt; | |
227 | } | |
228 | return remote; | |
229 | } | |
230 | ||
4df096a5 FBH |
231 | int cmd_archive(int argc, const char **argv, const char *prefix) |
232 | { | |
233 | struct archiver ar; | |
234 | int tree_idx; | |
37f94436 | 235 | const char *remote = NULL; |
4df096a5 | 236 | |
37f94436 JH |
237 | remote = remote_request(&argc, argv); |
238 | if (remote) | |
239 | return run_remote_archiver(remote, argc, argv); | |
4df096a5 | 240 | |
37f94436 JH |
241 | memset(&ar, 0, sizeof(ar)); |
242 | tree_idx = parse_archive_args(argc, argv, &ar); | |
4df096a5 FBH |
243 | if (prefix == NULL) |
244 | prefix = setup_git_directory(); | |
245 | ||
246 | argv += tree_idx; | |
247 | parse_treeish_arg(argv, &ar.args, prefix); | |
248 | parse_pathspec_arg(argv + 1, &ar.args); | |
249 | ||
250 | return ar.write_archive(&ar.args); | |
251 | } |