Merge branch 'db/no-git-config'
[git/debian.git] / builtin-archive.c
blobc2e0c1ea5a676f30baa52151d9e6a2a94d4cd091
1 /*
2 * Copyright (c) 2006 Franck Bui-Huu
3 * Copyright (c) 2006 Rene Scharfe
4 */
5 #include "cache.h"
6 #include "builtin.h"
7 #include "archive.h"
8 #include "commit.h"
9 #include "tree-walk.h"
10 #include "exec_cmd.h"
11 #include "pkt-line.h"
12 #include "sideband.h"
13 #include "attr.h"
15 static const char archive_usage[] = \
16 "git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
18 static struct archiver_desc
20 const char *name;
21 write_archive_fn_t write_archive;
22 parse_extra_args_fn_t parse_extra;
23 } archivers[] = {
24 { "tar", write_tar_archive, NULL },
25 { "zip", write_zip_archive, parse_extra_zip_args },
28 static int run_remote_archiver(const char *remote, int argc,
29 const char **argv)
31 char *url, buf[LARGE_PACKET_MAX];
32 int fd[2], i, len, rv;
33 struct child_process *conn;
34 const char *exec = "git-upload-archive";
35 int exec_at = 0;
37 for (i = 1; i < argc; i++) {
38 const char *arg = argv[i];
39 if (!prefixcmp(arg, "--exec=")) {
40 if (exec_at)
41 die("multiple --exec specified");
42 exec = arg + 7;
43 exec_at = i;
44 break;
48 url = xstrdup(remote);
49 conn = git_connect(fd, url, exec, 0);
51 for (i = 1; i < argc; i++) {
52 if (i == exec_at)
53 continue;
54 packet_write(fd[1], "argument %s\n", argv[i]);
56 packet_flush(fd[1]);
58 len = packet_read_line(fd[0], buf, sizeof(buf));
59 if (!len)
60 die("git-archive: expected ACK/NAK, got EOF");
61 if (buf[len-1] == '\n')
62 buf[--len] = 0;
63 if (strcmp(buf, "ACK")) {
64 if (len > 5 && !prefixcmp(buf, "NACK "))
65 die("git-archive: NACK %s", buf + 5);
66 die("git-archive: protocol error");
69 len = packet_read_line(fd[0], buf, sizeof(buf));
70 if (len)
71 die("git-archive: expected a flush");
73 /* Now, start reading from fd[0] and spit it out to stdout */
74 rv = recv_sideband("archive", fd[0], 1, 2);
75 close(fd[0]);
76 close(fd[1]);
77 rv |= finish_connect(conn);
79 return !!rv;
82 static int init_archiver(const char *name, struct archiver *ar)
84 int rv = -1, i;
86 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
87 if (!strcmp(name, archivers[i].name)) {
88 memset(ar, 0, sizeof(*ar));
89 ar->name = archivers[i].name;
90 ar->write_archive = archivers[i].write_archive;
91 ar->parse_extra = archivers[i].parse_extra;
92 rv = 0;
93 break;
96 return rv;
99 void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
101 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
104 void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
105 const char *prefix)
107 const char *name = argv[0];
108 const unsigned char *commit_sha1;
109 time_t archive_time;
110 struct tree *tree;
111 const struct commit *commit;
112 unsigned char sha1[20];
114 if (get_sha1(name, sha1))
115 die("Not a valid object name");
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);
126 tree = parse_tree_indirect(sha1);
127 if (tree == NULL)
128 die("not a tree object");
130 if (prefix) {
131 unsigned char tree_sha1[20];
132 unsigned int mode;
133 int err;
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");
140 tree = parse_tree_indirect(tree_sha1);
142 ar_args->tree = tree;
143 ar_args->commit_sha1 = commit_sha1;
144 ar_args->commit = commit;
145 ar_args->time = archive_time;
148 int parse_archive_args(int argc, const char **argv, struct archiver *ar)
150 const char *extra_argv[MAX_EXTRA_ARGS];
151 int extra_argc = 0;
152 const char *format = "tar";
153 const char *base = "";
154 int verbose = 0;
155 int i;
157 for (i = 1; i < argc; i++) {
158 const char *arg = argv[i];
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);
165 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
166 verbose = 1;
167 continue;
169 if (!prefixcmp(arg, "--format=")) {
170 format = arg + 9;
171 continue;
173 if (!prefixcmp(arg, "--prefix=")) {
174 base = arg + 9;
175 continue;
177 if (!strcmp(arg, "--")) {
178 i++;
179 break;
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;
187 break;
190 /* We need at least one parameter -- tree-ish */
191 if (argc - 1 < i)
192 usage(archive_usage);
193 if (init_archiver(format, ar) < 0)
194 die("Unknown archive format '%s'", format);
196 if (extra_argc) {
197 if (!ar->parse_extra)
198 die("'%s' format does not handle %s",
199 ar->name, extra_argv[0]);
200 ar->args.extra = ar->parse_extra(extra_argc, extra_argv);
202 ar->args.verbose = verbose;
203 ar->args.base = base;
205 return i;
208 static const char *extract_remote_arg(int *ac, const char **av)
210 int ix, iy, cnt = *ac;
211 int no_more_options = 0;
212 const char *remote = NULL;
214 for (ix = iy = 1; ix < cnt; ix++) {
215 const char *arg = av[ix];
216 if (!strcmp(arg, "--"))
217 no_more_options = 1;
218 if (!no_more_options) {
219 if (!prefixcmp(arg, "--remote=")) {
220 if (remote)
221 die("Multiple --remote specified");
222 remote = arg + 9;
223 continue;
225 if (arg[0] != '-')
226 no_more_options = 1;
228 if (ix != iy)
229 av[iy] = arg;
230 iy++;
232 if (remote) {
233 av[--cnt] = NULL;
234 *ac = cnt;
236 return remote;
239 int cmd_archive(int argc, const char **argv, const char *prefix)
241 struct archiver ar;
242 int tree_idx;
243 const char *remote = NULL;
245 remote = extract_remote_arg(&argc, argv);
246 if (remote)
247 return run_remote_archiver(remote, argc, argv);
249 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
251 memset(&ar, 0, sizeof(ar));
252 tree_idx = parse_archive_args(argc, argv, &ar);
253 if (prefix == NULL)
254 prefix = setup_git_directory();
256 argv += tree_idx;
257 parse_treeish_arg(argv, &ar.args, prefix);
258 parse_pathspec_arg(argv + 1, &ar.args);
260 return ar.write_archive(&ar.args);