e7f4ec634179a1cd23e967752b37e301f093e3ac
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"
14static const char archive_usage[] = \
16"git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
17const struct archiver archivers[] = {
19 { "tar", write_tar_archive, NULL },
20 { "zip", write_zip_archive, parse_extra_zip_args },
21};
22static int run_remote_archiver(const char *remote, int argc,
24 const char **argv)
25{
26 char *url, buf[LARGE_PACKET_MAX];
27 int fd[2], i, len, rv;
28 struct child_process *conn;
29 const char *exec = "git-upload-archive";
30 int exec_at = 0;
31 for (i = 1; i < argc; i++) {
33 const char *arg = argv[i];
34 if (!prefixcmp(arg, "--exec=")) {
35 if (exec_at)
36 die("multiple --exec specified");
37 exec = arg + 7;
38 exec_at = i;
39 break;
40 }
41 }
42 url = xstrdup(remote);
44 conn = git_connect(fd, url, exec, 0);
45 for (i = 1; i < argc; i++) {
47 if (i == exec_at)
48 continue;
49 packet_write(fd[1], "argument %s\n", argv[i]);
50 }
51 packet_flush(fd[1]);
52 len = packet_read_line(fd[0], buf, sizeof(buf));
54 if (!len)
55 die("git-archive: expected ACK/NAK, got EOF");
56 if (buf[len-1] == '\n')
57 buf[--len] = 0;
58 if (strcmp(buf, "ACK")) {
59 if (len > 5 && !prefixcmp(buf, "NACK "))
60 die("git-archive: NACK %s", buf + 5);
61 die("git-archive: protocol error");
62 }
63 len = packet_read_line(fd[0], buf, sizeof(buf));
65 if (len)
66 die("git-archive: expected a flush");
67 /* Now, start reading from fd[0] and spit it out to stdout */
69 rv = recv_sideband("archive", fd[0], 1, 2);
70 close(fd[0]);
71 close(fd[1]);
72 rv |= finish_connect(conn);
73 return !!rv;
75}
76static const struct archiver *lookup_archiver(const char *name)
78{
79 int i;
80 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
82 if (!strcmp(name, archivers[i].name))
83 return &archivers[i];
84 }
85 return NULL;
86}
87void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
89{
90 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
91}
92void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
94 const char *prefix)
95{
96 const char *name = argv[0];
97 const unsigned char *commit_sha1;
98 time_t archive_time;
99 struct tree *tree;
100 const struct commit *commit;
101 unsigned char sha1[20];
102 if (get_sha1(name, sha1))
104 die("Not a valid object name");
105 commit = lookup_commit_reference_gently(sha1, 1);
107 if (commit) {
108 commit_sha1 = commit->object.sha1;
109 archive_time = commit->date;
110 } else {
111 commit_sha1 = NULL;
112 archive_time = time(NULL);
113 }
114 tree = parse_tree_indirect(sha1);
116 if (tree == NULL)
117 die("not a tree object");
118 if (prefix) {
120 unsigned char tree_sha1[20];
121 unsigned int mode;
122 int err;
123 err = get_tree_entry(tree->object.sha1, prefix,
125 tree_sha1, &mode);
126 if (err || !S_ISDIR(mode))
127 die("current working directory is untracked");
128 tree = parse_tree_indirect(tree_sha1);
130 }
131 ar_args->tree = tree;
132 ar_args->commit_sha1 = commit_sha1;
133 ar_args->commit = commit;
134 ar_args->time = archive_time;
135}
136int parse_archive_args(int argc, const char **argv, const struct archiver **ar,
138 struct archiver_args *args)
139{
140 const char *extra_argv[MAX_EXTRA_ARGS];
141 int extra_argc = 0;
142 const char *format = "tar";
143 const char *base = "";
144 int verbose = 0;
145 int i;
146 for (i = 1; i < argc; i++) {
148 const char *arg = argv[i];
149 if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
151 for (i = 0; i < ARRAY_SIZE(archivers); i++)
152 printf("%s\n", archivers[i].name);
153 exit(0);
154 }
155 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
156 verbose = 1;
157 continue;
158 }
159 if (!prefixcmp(arg, "--format=")) {
160 format = arg + 9;
161 continue;
162 }
163 if (!prefixcmp(arg, "--prefix=")) {
164 base = arg + 9;
165 continue;
166 }
167 if (!strcmp(arg, "--")) {
168 i++;
169 break;
170 }
171 if (arg[0] == '-') {
172 if (extra_argc > MAX_EXTRA_ARGS - 1)
173 die("Too many extra options");
174 extra_argv[extra_argc++] = arg;
175 continue;
176 }
177 break;
178 }
179 /* We need at least one parameter -- tree-ish */
181 if (argc - 1 < i)
182 usage(archive_usage);
183 *ar = lookup_archiver(format);
184 if (!*ar)
185 die("Unknown archive format '%s'", format);
186 if (extra_argc) {
188 if (!(*ar)->parse_extra)
189 die("'%s' format does not handle %s",
190 (*ar)->name, extra_argv[0]);
191 args->extra = (*ar)->parse_extra(extra_argc, extra_argv);
192 }
193 args->verbose = verbose;
194 args->base = base;
195 args->baselen = strlen(base);
196 return i;
198}
199static const char *extract_remote_arg(int *ac, const char **av)
201{
202 int ix, iy, cnt = *ac;
203 int no_more_options = 0;
204 const char *remote = NULL;
205 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 (!prefixcmp(arg, "--remote=")) {
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}
230int cmd_archive(int argc, const char **argv, const char *prefix)
232{
233 const struct archiver *ar = NULL;
234 struct archiver_args args;
235 int tree_idx;
236 const char *remote = NULL;
237 remote = extract_remote_arg(&argc, argv);
239 if (remote)
240 return run_remote_archiver(remote, argc, argv);
241 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
243 tree_idx = parse_archive_args(argc, argv, &ar, &args);
245 if (prefix == NULL)
246 prefix = setup_git_directory();
247 argv += tree_idx;
249 parse_treeish_arg(argv, &args, prefix);
250 parse_pathspec_arg(argv + 1, &args);
251 return ar->write_archive(&args);
253}