Merge branch 'maint'
[git/git.git] / builtin-archive.c
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 #include "sideband.h"
14
15 static const char archive_usage[] = \
16 "git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
17
18 struct archiver archivers[] = {
19 {
20 .name = "tar",
21 .write_archive = write_tar_archive,
22 },
23 {
24 .name = "zip",
25 .write_archive = write_zip_archive,
26 .parse_extra = parse_extra_zip_args,
27 },
28 };
29
30 static int run_remote_archiver(const char *remote, int argc,
31 const char **argv)
32 {
33 char *url, buf[LARGE_PACKET_MAX];
34 int fd[2], i, len, rv;
35 pid_t pid;
36 const char *exec = "git-upload-archive";
37 int exec_at = 0;
38
39 for (i = 1; i < argc; i++) {
40 const char *arg = argv[i];
41 if (!strncmp("--exec=", arg, 7)) {
42 if (exec_at)
43 die("multiple --exec specified");
44 exec = arg + 7;
45 exec_at = i;
46 break;
47 }
48 }
49
50 url = xstrdup(remote);
51 pid = git_connect(fd, url, exec);
52 if (pid < 0)
53 return pid;
54
55 for (i = 1; i < argc; i++) {
56 if (i == exec_at)
57 continue;
58 packet_write(fd[1], "argument %s\n", argv[i]);
59 }
60 packet_flush(fd[1]);
61
62 len = packet_read_line(fd[0], buf, sizeof(buf));
63 if (!len)
64 die("git-archive: expected ACK/NAK, got EOF");
65 if (buf[len-1] == '\n')
66 buf[--len] = 0;
67 if (strcmp(buf, "ACK")) {
68 if (len > 5 && !strncmp(buf, "NACK ", 5))
69 die("git-archive: NACK %s", buf + 5);
70 die("git-archive: protocol error");
71 }
72
73 len = packet_read_line(fd[0], buf, sizeof(buf));
74 if (len)
75 die("git-archive: expected a flush");
76
77 /* Now, start reading from fd[0] and spit it out to stdout */
78 rv = recv_sideband("archive", fd[0], 1, 2);
79 close(fd[0]);
80 rv |= finish_connect(pid);
81
82 return !!rv;
83 }
84
85 static int init_archiver(const char *name, struct archiver *ar)
86 {
87 int rv = -1, i;
88
89 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
90 if (!strcmp(name, archivers[i].name)) {
91 memcpy(ar, &archivers[i], sizeof(struct archiver));
92 rv = 0;
93 break;
94 }
95 }
96 return rv;
97 }
98
99 void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
100 {
101 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
102 }
103
104 void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
105 const char *prefix)
106 {
107 const char *name = argv[0];
108 const unsigned char *commit_sha1;
109 time_t archive_time;
110 struct tree *tree;
111 struct commit *commit;
112 unsigned char sha1[20];
113
114 if (get_sha1(name, sha1))
115 die("Not a valid object name");
116
117 commit = lookup_commit_reference_gently(sha1, 1);
118 if (commit) {
119 commit_sha1 = commit->object.sha1;
120 archive_time = commit->date;
121 } else {
122 commit_sha1 = NULL;
123 archive_time = time(NULL);
124 }
125
126 tree = parse_tree_indirect(sha1);
127 if (tree == NULL)
128 die("not a tree object");
129
130 if (prefix) {
131 unsigned char tree_sha1[20];
132 unsigned int mode;
133 int err;
134
135 err = get_tree_entry(tree->object.sha1, prefix,
136 tree_sha1, &mode);
137 if (err || !S_ISDIR(mode))
138 die("current working directory is untracked");
139
140 free(tree);
141 tree = parse_tree_indirect(tree_sha1);
142 }
143 ar_args->tree = tree;
144 ar_args->commit_sha1 = commit_sha1;
145 ar_args->time = archive_time;
146 }
147
148 int parse_archive_args(int argc, const char **argv, struct archiver *ar)
149 {
150 const char *extra_argv[MAX_EXTRA_ARGS];
151 int extra_argc = 0;
152 const char *format = NULL; /* might want to default to "tar" */
153 const char *base = "";
154 int verbose = 0;
155 int i;
156
157 for (i = 1; i < argc; i++) {
158 const char *arg = argv[i];
159
160 if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
161 for (i = 0; i < ARRAY_SIZE(archivers); i++)
162 printf("%s\n", archivers[i].name);
163 exit(0);
164 }
165 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
166 verbose = 1;
167 continue;
168 }
169 if (!strncmp(arg, "--format=", 9)) {
170 format = arg + 9;
171 continue;
172 }
173 if (!strncmp(arg, "--prefix=", 9)) {
174 base = arg + 9;
175 continue;
176 }
177 if (!strcmp(arg, "--")) {
178 i++;
179 break;
180 }
181 if (arg[0] == '-') {
182 if (extra_argc > MAX_EXTRA_ARGS - 1)
183 die("Too many extra options");
184 extra_argv[extra_argc++] = arg;
185 continue;
186 }
187 break;
188 }
189
190 /* We need at least one parameter -- tree-ish */
191 if (argc - 1 < i)
192 usage(archive_usage);
193 if (!format)
194 die("You must specify an archive format");
195 if (init_archiver(format, ar) < 0)
196 die("Unknown archive format '%s'", format);
197
198 if (extra_argc) {
199 if (!ar->parse_extra)
200 die("'%s' format does not handle %s",
201 ar->name, extra_argv[0]);
202 ar->args.extra = ar->parse_extra(extra_argc, extra_argv);
203 }
204 ar->args.verbose = verbose;
205 ar->args.base = base;
206
207 return i;
208 }
209
210 static const char *extract_remote_arg(int *ac, const char **av)
211 {
212 int ix, iy, cnt = *ac;
213 int no_more_options = 0;
214 const char *remote = NULL;
215
216 for (ix = iy = 1; ix < cnt; ix++) {
217 const char *arg = av[ix];
218 if (!strcmp(arg, "--"))
219 no_more_options = 1;
220 if (!no_more_options) {
221 if (!strncmp(arg, "--remote=", 9)) {
222 if (remote)
223 die("Multiple --remote specified");
224 remote = arg + 9;
225 continue;
226 }
227 if (arg[0] != '-')
228 no_more_options = 1;
229 }
230 if (ix != iy)
231 av[iy] = arg;
232 iy++;
233 }
234 if (remote) {
235 av[--cnt] = NULL;
236 *ac = cnt;
237 }
238 return remote;
239 }
240
241 int cmd_archive(int argc, const char **argv, const char *prefix)
242 {
243 struct archiver ar;
244 int tree_idx;
245 const char *remote = NULL;
246
247 remote = extract_remote_arg(&argc, argv);
248 if (remote)
249 return run_remote_archiver(remote, argc, argv);
250
251 setlinebuf(stderr);
252
253 memset(&ar, 0, sizeof(ar));
254 tree_idx = parse_archive_args(argc, argv, &ar);
255 if (prefix == NULL)
256 prefix = setup_git_directory();
257
258 argv += tree_idx;
259 parse_treeish_arg(argv, &ar.args, prefix);
260 parse_pathspec_arg(argv + 1, &ar.args);
261
262 return ar.write_archive(&ar.args);
263 }