Correct some sizeof(size_t) != sizeof(unsigned long) typing errors
[git/git.git] / builtin-archive.c
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"
14
15 static const char archive_usage[] = \
16 "git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
17
18 static struct archiver_desc
19 {
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 },
26 };
27
28 static int run_remote_archiver(const char *remote, int argc,
29 const char **argv)
30 {
31 char *url, buf[LARGE_PACKET_MAX];
32 int fd[2], i, len, rv;
33 pid_t pid;
34 const char *exec = "git-upload-archive";
35 int exec_at = 0;
36
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;
45 }
46 }
47
48 url = xstrdup(remote);
49 pid = git_connect(fd, url, exec, 0);
50 if (pid < 0)
51 return pid;
52
53 for (i = 1; i < argc; i++) {
54 if (i == exec_at)
55 continue;
56 packet_write(fd[1], "argument %s\n", argv[i]);
57 }
58 packet_flush(fd[1]);
59
60 len = packet_read_line(fd[0], buf, sizeof(buf));
61 if (!len)
62 die("git-archive: expected ACK/NAK, got EOF");
63 if (buf[len-1] == '\n')
64 buf[--len] = 0;
65 if (strcmp(buf, "ACK")) {
66 if (len > 5 && !prefixcmp(buf, "NACK "))
67 die("git-archive: NACK %s", buf + 5);
68 die("git-archive: protocol error");
69 }
70
71 len = packet_read_line(fd[0], buf, sizeof(buf));
72 if (len)
73 die("git-archive: expected a flush");
74
75 /* Now, start reading from fd[0] and spit it out to stdout */
76 rv = recv_sideband("archive", fd[0], 1, 2);
77 close(fd[0]);
78 close(fd[1]);
79 rv |= finish_connect(pid);
80
81 return !!rv;
82 }
83
84 static void format_subst(const struct commit *commit,
85 const char *src, size_t len,
86 struct strbuf *buf)
87 {
88 char *to_free = NULL;
89 struct strbuf fmt;
90
91 if (src == buf->buf)
92 to_free = strbuf_detach(buf, NULL);
93 strbuf_init(&fmt, 0);
94 for (;;) {
95 const char *b, *c;
96
97 b = memmem(src, len, "$Format:", 8);
98 if (!b || src + len < b + 9)
99 break;
100 c = memchr(b + 8, '$', len - 8);
101 if (!c)
102 break;
103
104 strbuf_reset(&fmt);
105 strbuf_add(&fmt, b + 8, c - b - 8);
106
107 strbuf_add(buf, src, b - src);
108 format_commit_message(commit, fmt.buf, buf);
109 len -= c + 1 - src;
110 src = c + 1;
111 }
112 strbuf_add(buf, src, len);
113 strbuf_release(&fmt);
114 free(to_free);
115 }
116
117 static int convert_to_archive(const char *path,
118 const void *src, size_t len,
119 struct strbuf *buf,
120 const struct commit *commit)
121 {
122 static struct git_attr *attr_export_subst;
123 struct git_attr_check check[1];
124
125 if (!commit)
126 return 0;
127
128 if (!attr_export_subst)
129 attr_export_subst = git_attr("export-subst", 12);
130
131 check[0].attr = attr_export_subst;
132 if (git_checkattr(path, ARRAY_SIZE(check), check))
133 return 0;
134 if (!ATTR_TRUE(check[0].value))
135 return 0;
136
137 format_subst(commit, src, len, buf);
138 return 1;
139 }
140
141 void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
142 unsigned int mode, enum object_type *type,
143 unsigned long *sizep,
144 const struct commit *commit)
145 {
146 void *buffer;
147
148 buffer = read_sha1_file(sha1, type, sizep);
149 if (buffer && S_ISREG(mode)) {
150 struct strbuf buf;
151 size_t size = 0;
152
153 strbuf_init(&buf, 0);
154 strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
155 convert_to_working_tree(path, buf.buf, buf.len, &buf);
156 convert_to_archive(path, buf.buf, buf.len, &buf, commit);
157 buffer = strbuf_detach(&buf, &size);
158 *sizep = size;
159 }
160
161 return buffer;
162 }
163
164 static int init_archiver(const char *name, struct archiver *ar)
165 {
166 int rv = -1, i;
167
168 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
169 if (!strcmp(name, archivers[i].name)) {
170 memset(ar, 0, sizeof(*ar));
171 ar->name = archivers[i].name;
172 ar->write_archive = archivers[i].write_archive;
173 ar->parse_extra = archivers[i].parse_extra;
174 rv = 0;
175 break;
176 }
177 }
178 return rv;
179 }
180
181 void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
182 {
183 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
184 }
185
186 void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
187 const char *prefix)
188 {
189 const char *name = argv[0];
190 const unsigned char *commit_sha1;
191 time_t archive_time;
192 struct tree *tree;
193 const struct commit *commit;
194 unsigned char sha1[20];
195
196 if (get_sha1(name, sha1))
197 die("Not a valid object name");
198
199 commit = lookup_commit_reference_gently(sha1, 1);
200 if (commit) {
201 commit_sha1 = commit->object.sha1;
202 archive_time = commit->date;
203 } else {
204 commit_sha1 = NULL;
205 archive_time = time(NULL);
206 }
207
208 tree = parse_tree_indirect(sha1);
209 if (tree == NULL)
210 die("not a tree object");
211
212 if (prefix) {
213 unsigned char tree_sha1[20];
214 unsigned int mode;
215 int err;
216
217 err = get_tree_entry(tree->object.sha1, prefix,
218 tree_sha1, &mode);
219 if (err || !S_ISDIR(mode))
220 die("current working directory is untracked");
221
222 tree = parse_tree_indirect(tree_sha1);
223 }
224 ar_args->tree = tree;
225 ar_args->commit_sha1 = commit_sha1;
226 ar_args->commit = commit;
227 ar_args->time = archive_time;
228 }
229
230 int parse_archive_args(int argc, const char **argv, struct archiver *ar)
231 {
232 const char *extra_argv[MAX_EXTRA_ARGS];
233 int extra_argc = 0;
234 const char *format = "tar";
235 const char *base = "";
236 int verbose = 0;
237 int i;
238
239 for (i = 1; i < argc; i++) {
240 const char *arg = argv[i];
241
242 if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
243 for (i = 0; i < ARRAY_SIZE(archivers); i++)
244 printf("%s\n", archivers[i].name);
245 exit(0);
246 }
247 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
248 verbose = 1;
249 continue;
250 }
251 if (!prefixcmp(arg, "--format=")) {
252 format = arg + 9;
253 continue;
254 }
255 if (!prefixcmp(arg, "--prefix=")) {
256 base = arg + 9;
257 continue;
258 }
259 if (!strcmp(arg, "--")) {
260 i++;
261 break;
262 }
263 if (arg[0] == '-') {
264 if (extra_argc > MAX_EXTRA_ARGS - 1)
265 die("Too many extra options");
266 extra_argv[extra_argc++] = arg;
267 continue;
268 }
269 break;
270 }
271
272 /* We need at least one parameter -- tree-ish */
273 if (argc - 1 < i)
274 usage(archive_usage);
275 if (init_archiver(format, ar) < 0)
276 die("Unknown archive format '%s'", format);
277
278 if (extra_argc) {
279 if (!ar->parse_extra)
280 die("'%s' format does not handle %s",
281 ar->name, extra_argv[0]);
282 ar->args.extra = ar->parse_extra(extra_argc, extra_argv);
283 }
284 ar->args.verbose = verbose;
285 ar->args.base = base;
286
287 return i;
288 }
289
290 static const char *extract_remote_arg(int *ac, const char **av)
291 {
292 int ix, iy, cnt = *ac;
293 int no_more_options = 0;
294 const char *remote = NULL;
295
296 for (ix = iy = 1; ix < cnt; ix++) {
297 const char *arg = av[ix];
298 if (!strcmp(arg, "--"))
299 no_more_options = 1;
300 if (!no_more_options) {
301 if (!prefixcmp(arg, "--remote=")) {
302 if (remote)
303 die("Multiple --remote specified");
304 remote = arg + 9;
305 continue;
306 }
307 if (arg[0] != '-')
308 no_more_options = 1;
309 }
310 if (ix != iy)
311 av[iy] = arg;
312 iy++;
313 }
314 if (remote) {
315 av[--cnt] = NULL;
316 *ac = cnt;
317 }
318 return remote;
319 }
320
321 int cmd_archive(int argc, const char **argv, const char *prefix)
322 {
323 struct archiver ar;
324 int tree_idx;
325 const char *remote = NULL;
326
327 remote = extract_remote_arg(&argc, argv);
328 if (remote)
329 return run_remote_archiver(remote, argc, argv);
330
331 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
332
333 memset(&ar, 0, sizeof(ar));
334 tree_idx = parse_archive_args(argc, argv, &ar);
335 if (prefix == NULL)
336 prefix = setup_git_directory();
337
338 argv += tree_idx;
339 parse_treeish_arg(argv, &ar.args, prefix);
340 parse_pathspec_arg(argv + 1, &ar.args);
341
342 return ar.write_archive(&ar.args);
343 }