Use strbufs to in read_message (imap-send.c), custom buffer--.
[git/debian.git] / builtin-archive.c
blobb50d5ad19654153129e5b24a4aa585f78cef1d54
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 pid_t pid;
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 pid = git_connect(fd, url, exec, 0);
50 if (pid < 0)
51 return pid;
53 for (i = 1; i < argc; i++) {
54 if (i == exec_at)
55 continue;
56 packet_write(fd[1], "argument %s\n", argv[i]);
58 packet_flush(fd[1]);
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");
71 len = packet_read_line(fd[0], buf, sizeof(buf));
72 if (len)
73 die("git-archive: expected a flush");
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);
81 return !!rv;
84 static void *format_subst(const struct commit *commit, const char *format,
85 unsigned long *sizep)
87 unsigned long len = *sizep;
88 const char *a = format;
89 struct strbuf result;
90 struct strbuf fmt;
92 strbuf_init(&result, 0);
93 strbuf_init(&fmt, 0);
95 for (;;) {
96 const char *b, *c;
98 b = memmem(a, len, "$Format:", 8);
99 if (!b || a + len < b + 9)
100 break;
101 c = memchr(b + 8, '$', len - 8);
102 if (!c)
103 break;
105 strbuf_reset(&fmt);
106 strbuf_add(&fmt, b + 8, c - b - 8);
108 strbuf_add(&result, a, b - a);
109 format_commit_message(commit, fmt.buf, &result);
110 len -= c + 1 - a;
111 a = c + 1;
114 if (result.len && len) {
115 strbuf_add(&result, a, len);
118 *sizep = result.len;
120 strbuf_release(&fmt);
121 return strbuf_detach(&result);
124 static void *convert_to_archive(const char *path,
125 const void *src, unsigned long *sizep,
126 const struct commit *commit)
128 static struct git_attr *attr_export_subst;
129 struct git_attr_check check[1];
131 if (!commit)
132 return NULL;
134 if (!attr_export_subst)
135 attr_export_subst = git_attr("export-subst", 12);
137 check[0].attr = attr_export_subst;
138 if (git_checkattr(path, ARRAY_SIZE(check), check))
139 return NULL;
140 if (!ATTR_TRUE(check[0].value))
141 return NULL;
143 return format_subst(commit, src, sizep);
146 void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
147 unsigned int mode, enum object_type *type,
148 unsigned long *size,
149 const struct commit *commit)
151 void *buffer, *converted;
153 buffer = read_sha1_file(sha1, type, size);
154 if (buffer && S_ISREG(mode)) {
155 converted = convert_to_working_tree(path, buffer, size);
156 if (converted) {
157 free(buffer);
158 buffer = converted;
161 converted = convert_to_archive(path, buffer, size, commit);
162 if (converted) {
163 free(buffer);
164 buffer = converted;
168 return buffer;
171 static int init_archiver(const char *name, struct archiver *ar)
173 int rv = -1, i;
175 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
176 if (!strcmp(name, archivers[i].name)) {
177 memset(ar, 0, sizeof(*ar));
178 ar->name = archivers[i].name;
179 ar->write_archive = archivers[i].write_archive;
180 ar->parse_extra = archivers[i].parse_extra;
181 rv = 0;
182 break;
185 return rv;
188 void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
190 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
193 void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
194 const char *prefix)
196 const char *name = argv[0];
197 const unsigned char *commit_sha1;
198 time_t archive_time;
199 struct tree *tree;
200 const struct commit *commit;
201 unsigned char sha1[20];
203 if (get_sha1(name, sha1))
204 die("Not a valid object name");
206 commit = lookup_commit_reference_gently(sha1, 1);
207 if (commit) {
208 commit_sha1 = commit->object.sha1;
209 archive_time = commit->date;
210 } else {
211 commit_sha1 = NULL;
212 archive_time = time(NULL);
215 tree = parse_tree_indirect(sha1);
216 if (tree == NULL)
217 die("not a tree object");
219 if (prefix) {
220 unsigned char tree_sha1[20];
221 unsigned int mode;
222 int err;
224 err = get_tree_entry(tree->object.sha1, prefix,
225 tree_sha1, &mode);
226 if (err || !S_ISDIR(mode))
227 die("current working directory is untracked");
229 tree = parse_tree_indirect(tree_sha1);
231 ar_args->tree = tree;
232 ar_args->commit_sha1 = commit_sha1;
233 ar_args->commit = commit;
234 ar_args->time = archive_time;
237 int parse_archive_args(int argc, const char **argv, struct archiver *ar)
239 const char *extra_argv[MAX_EXTRA_ARGS];
240 int extra_argc = 0;
241 const char *format = "tar";
242 const char *base = "";
243 int verbose = 0;
244 int i;
246 for (i = 1; i < argc; i++) {
247 const char *arg = argv[i];
249 if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
250 for (i = 0; i < ARRAY_SIZE(archivers); i++)
251 printf("%s\n", archivers[i].name);
252 exit(0);
254 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
255 verbose = 1;
256 continue;
258 if (!prefixcmp(arg, "--format=")) {
259 format = arg + 9;
260 continue;
262 if (!prefixcmp(arg, "--prefix=")) {
263 base = arg + 9;
264 continue;
266 if (!strcmp(arg, "--")) {
267 i++;
268 break;
270 if (arg[0] == '-') {
271 if (extra_argc > MAX_EXTRA_ARGS - 1)
272 die("Too many extra options");
273 extra_argv[extra_argc++] = arg;
274 continue;
276 break;
279 /* We need at least one parameter -- tree-ish */
280 if (argc - 1 < i)
281 usage(archive_usage);
282 if (init_archiver(format, ar) < 0)
283 die("Unknown archive format '%s'", format);
285 if (extra_argc) {
286 if (!ar->parse_extra)
287 die("'%s' format does not handle %s",
288 ar->name, extra_argv[0]);
289 ar->args.extra = ar->parse_extra(extra_argc, extra_argv);
291 ar->args.verbose = verbose;
292 ar->args.base = base;
294 return i;
297 static const char *extract_remote_arg(int *ac, const char **av)
299 int ix, iy, cnt = *ac;
300 int no_more_options = 0;
301 const char *remote = NULL;
303 for (ix = iy = 1; ix < cnt; ix++) {
304 const char *arg = av[ix];
305 if (!strcmp(arg, "--"))
306 no_more_options = 1;
307 if (!no_more_options) {
308 if (!prefixcmp(arg, "--remote=")) {
309 if (remote)
310 die("Multiple --remote specified");
311 remote = arg + 9;
312 continue;
314 if (arg[0] != '-')
315 no_more_options = 1;
317 if (ix != iy)
318 av[iy] = arg;
319 iy++;
321 if (remote) {
322 av[--cnt] = NULL;
323 *ac = cnt;
325 return remote;
328 int cmd_archive(int argc, const char **argv, const char *prefix)
330 struct archiver ar;
331 int tree_idx;
332 const char *remote = NULL;
334 remote = extract_remote_arg(&argc, argv);
335 if (remote)
336 return run_remote_archiver(remote, argc, argv);
338 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
340 memset(&ar, 0, sizeof(ar));
341 tree_idx = parse_archive_args(argc, argv, &ar);
342 if (prefix == NULL)
343 prefix = setup_git_directory();
345 argv += tree_idx;
346 parse_treeish_arg(argv, &ar.args, prefix);
347 parse_pathspec_arg(argv + 1, &ar.args);
349 return ar.write_archive(&ar.args);