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chromium / external / github.com / git / git / refs/tags/v1.6.1 / . / archive.c
blob: 9ac455d889b72deba8c949da1d9efe2be3a50244 [file] [log] [blame]
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]1#include "cache.h"
2#include "commit.h"
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]3#include "tree-walk.h"
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]4#include "attr.h"
René Scharfe562e25a2008-07-14 19:22:24[diff] [blame]5#include "archive.h"
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]6#include "parse-options.h"
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]7
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]8static char const * const archive_usage[] = {
9 "git archive [options] <tree-ish> [path...]",
10 "git archive --list",
11 "git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
12 "git archive --remote <repo> [--exec <cmd>] --list",
13 NULL
14};
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]15
16#define USES_ZLIB_COMPRESSION 1
17
Nanako Shiraishi120a3852008-10-02 10:14:33[diff] [blame]18static const struct archiver {
Rene Scharfef15f7362008-07-25 10:41:24[diff] [blame]19 const char *name;
20 write_archive_fn_t write_archive;
21 unsigned int flags;
22} archivers[] = {
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]23 { "tar", write_tar_archive },
24 { "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
25};
26
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]27static void format_subst(const struct commit *commit,
28 const char *src, size_t len,
29 struct strbuf *buf)
30{
31 char *to_free = NULL;
Brandon Caseyf285a2d2008-10-09 19:12:12[diff] [blame]32 struct strbuf fmt = STRBUF_INIT;
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]33
34 if (src == buf->buf)
35 to_free = strbuf_detach(buf, NULL);
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]36 for (;;) {
37 const char *b, *c;
38
39 b = memmem(src, len, "$Format:", 8);
Ariel Badichi75b7dfb2008-04-23 01:06:27[diff] [blame]40 if (!b)
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]41 break;
Ariel Badichi75b7dfb2008-04-23 01:06:27[diff] [blame]42 c = memchr(b + 8, '$', (src + len) - b - 8);
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]43 if (!c)
44 break;
45
46 strbuf_reset(&fmt);
47 strbuf_add(&fmt, b + 8, c - b - 8);
48
49 strbuf_add(buf, src, b - src);
Jeff Kingd36f8672008-08-29 00:54:59[diff] [blame]50 format_commit_message(commit, fmt.buf, buf, DATE_NORMAL);
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]51 len -= c + 1 - src;
52 src = c + 1;
53 }
54 strbuf_add(buf, src, len);
55 strbuf_release(&fmt);
56 free(to_free);
57}
58
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]59static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
60 unsigned int mode, enum object_type *type,
61 unsigned long *sizep, const struct commit *commit)
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]62{
63 void *buffer;
64
65 buffer = read_sha1_file(sha1, type, sizep);
66 if (buffer && S_ISREG(mode)) {
Brandon Caseyf285a2d2008-10-09 19:12:12[diff] [blame]67 struct strbuf buf = STRBUF_INIT;
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]68 size_t size = 0;
69
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]70 strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
71 convert_to_working_tree(path, buf.buf, buf.len, &buf);
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]72 if (commit)
73 format_subst(commit, buf.buf, buf.len, &buf);
Lars Hjemli18125642008-01-14 16:36:34[diff] [blame]74 buffer = strbuf_detach(&buf, &size);
75 *sizep = size;
76 }
77
78 return buffer;
79}
80
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]81static void setup_archive_check(struct git_attr_check *check)
René Scharfe008d8962008-06-08 16:42:33[diff] [blame]82{
83 static struct git_attr *attr_export_ignore;
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]84 static struct git_attr *attr_export_subst;
René Scharfe008d8962008-06-08 16:42:33[diff] [blame]85
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]86 if (!attr_export_ignore) {
René Scharfe008d8962008-06-08 16:42:33[diff] [blame]87 attr_export_ignore = git_attr("export-ignore", 13);
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]88 attr_export_subst = git_attr("export-subst", 12);
89 }
René Scharfe008d8962008-06-08 16:42:33[diff] [blame]90 check[0].attr = attr_export_ignore;
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]91 check[1].attr = attr_export_subst;
René Scharfe008d8962008-06-08 16:42:33[diff] [blame]92}
René Scharfe562e25a2008-07-14 19:22:24[diff] [blame]93
94struct archiver_context {
95 struct archiver_args *args;
96 write_archive_entry_fn_t write_entry;
97};
98
99static int write_archive_entry(const unsigned char *sha1, const char *base,
100 int baselen, const char *filename, unsigned mode, int stage,
101 void *context)
102{
103 static struct strbuf path = STRBUF_INIT;
104 struct archiver_context *c = context;
105 struct archiver_args *args = c->args;
106 write_archive_entry_fn_t write_entry = c->write_entry;
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]107 struct git_attr_check check[2];
108 const char *path_without_prefix;
109 int convert = 0;
René Scharfe562e25a2008-07-14 19:22:24[diff] [blame]110 int err;
111 enum object_type type;
112 unsigned long size;
113 void *buffer;
114
115 strbuf_reset(&path);
116 strbuf_grow(&path, PATH_MAX);
117 strbuf_add(&path, base, baselen);
118 strbuf_addstr(&path, filename);
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]119 path_without_prefix = path.buf + args->baselen;
René Scharfe562e25a2008-07-14 19:22:24[diff] [blame]120
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]121 setup_archive_check(check);
122 if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
123 if (ATTR_TRUE(check[0].value))
124 return 0;
125 convert = ATTR_TRUE(check[1].value);
126 }
René Scharfe562e25a2008-07-14 19:22:24[diff] [blame]127
128 if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
129 strbuf_addch(&path, '/');
130 if (args->verbose)
131 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
132 err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
133 if (err)
134 return err;
135 return READ_TREE_RECURSIVE;
136 }
137
René Scharfe1d11d5b2008-07-14 19:22:29[diff] [blame]138 buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
139 &type, &size, convert ? args->commit : NULL);
René Scharfe562e25a2008-07-14 19:22:24[diff] [blame]140 if (!buffer)
141 return error("cannot read %s", sha1_to_hex(sha1));
142 if (args->verbose)
143 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
144 err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
145 free(buffer);
146 return err;
147}
148
149int write_archive_entries(struct archiver_args *args,
150 write_archive_entry_fn_t write_entry)
151{
152 struct archiver_context context;
153 int err;
154
155 if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
156 size_t len = args->baselen;
157
158 while (len > 1 && args->base[len - 2] == '/')
159 len--;
160 if (args->verbose)
161 fprintf(stderr, "%.*s\n", (int)len, args->base);
162 err = write_entry(args, args->tree->object.sha1, args->base,
163 len, 040777, NULL, 0);
164 if (err)
165 return err;
166 }
167
168 context.args = args;
169 context.write_entry = write_entry;
170
171 err = read_tree_recursive(args->tree, args->base, args->baselen, 0,
172 args->pathspec, write_archive_entry, &context);
173 if (err == READ_TREE_RECURSIVE)
174 err = 0;
175 return err;
176}
Rene Scharfe6e94e682008-07-25 10:41:21[diff] [blame]177
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]178static const struct archiver *lookup_archiver(const char *name)
179{
180 int i;
181
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]182 if (!name)
183 return NULL;
184
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]185 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
186 if (!strcmp(name, archivers[i].name))
187 return &archivers[i];
188 }
189 return NULL;
190}
191
192static void parse_pathspec_arg(const char **pathspec,
193 struct archiver_args *ar_args)
194{
195 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
196}
197
198static void parse_treeish_arg(const char **argv,
199 struct archiver_args *ar_args, const char *prefix)
200{
201 const char *name = argv[0];
202 const unsigned char *commit_sha1;
203 time_t archive_time;
204 struct tree *tree;
205 const struct commit *commit;
206 unsigned char sha1[20];
207
208 if (get_sha1(name, sha1))
209 die("Not a valid object name");
210
211 commit = lookup_commit_reference_gently(sha1, 1);
212 if (commit) {
213 commit_sha1 = commit->object.sha1;
214 archive_time = commit->date;
215 } else {
216 commit_sha1 = NULL;
217 archive_time = time(NULL);
218 }
219
220 tree = parse_tree_indirect(sha1);
221 if (tree == NULL)
222 die("not a tree object");
223
224 if (prefix) {
225 unsigned char tree_sha1[20];
226 unsigned int mode;
227 int err;
228
229 err = get_tree_entry(tree->object.sha1, prefix,
230 tree_sha1, &mode);
231 if (err || !S_ISDIR(mode))
232 die("current working directory is untracked");
233
234 tree = parse_tree_indirect(tree_sha1);
235 }
236 ar_args->tree = tree;
237 ar_args->commit_sha1 = commit_sha1;
238 ar_args->commit = commit;
239 ar_args->time = archive_time;
240}
241
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]242#define OPT__COMPR(s, v, h, p) \
243 { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
244 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
245#define OPT__COMPR_HIDDEN(s, v, p) \
246 { OPTION_SET_INT, (s), NULL, (v), NULL, "", \
247 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) }
248
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]249static int parse_archive_args(int argc, const char **argv,
250 const struct archiver **ar, struct archiver_args *args)
251{
252 const char *format = "tar";
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]253 const char *base = NULL;
254 const char *remote = NULL;
255 const char *exec = NULL;
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]256 int compression_level = -1;
257 int verbose = 0;
258 int i;
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]259 int list = 0;
260 struct option opts[] = {
261 OPT_GROUP(""),
262 OPT_STRING(0, "format", &format, "fmt", "archive format"),
263 OPT_STRING(0, "prefix", &base, "prefix",
264 "prepend prefix to each pathname in the archive"),
265 OPT__VERBOSE(&verbose),
266 OPT__COMPR('0', &compression_level, "store only", 0),
267 OPT__COMPR('1', &compression_level, "compress faster", 1),
268 OPT__COMPR_HIDDEN('2', &compression_level, 2),
269 OPT__COMPR_HIDDEN('3', &compression_level, 3),
270 OPT__COMPR_HIDDEN('4', &compression_level, 4),
271 OPT__COMPR_HIDDEN('5', &compression_level, 5),
272 OPT__COMPR_HIDDEN('6', &compression_level, 6),
273 OPT__COMPR_HIDDEN('7', &compression_level, 7),
274 OPT__COMPR_HIDDEN('8', &compression_level, 8),
275 OPT__COMPR('9', &compression_level, "compress better", 9),
276 OPT_GROUP(""),
277 OPT_BOOLEAN('l', "list", &list,
278 "list supported archive formats"),
279 OPT_GROUP(""),
280 OPT_STRING(0, "remote", &remote, "repo",
281 "retrieve the archive from remote repository <repo>"),
282 OPT_STRING(0, "exec", &exec, "cmd",
283 "path to the remote git-upload-archive command"),
284 OPT_END()
285 };
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]286
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]287 argc = parse_options(argc, argv, opts, archive_usage, 0);
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]288
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]289 if (remote)
290 die("Unexpected option --remote");
291 if (exec)
292 die("Option --exec can only be used together with --remote");
293
294 if (!base)
295 base = "";
296
297 if (list) {
298 for (i = 0; i < ARRAY_SIZE(archivers); i++)
299 printf("%s\n", archivers[i].name);
300 exit(0);
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]301 }
302
303 /* We need at least one parameter -- tree-ish */
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]304 if (argc < 1)
305 usage_with_options(archive_usage, opts);
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]306 *ar = lookup_archiver(format);
307 if (!*ar)
308 die("Unknown archive format '%s'", format);
309
310 args->compression_level = Z_DEFAULT_COMPRESSION;
311 if (compression_level != -1) {
312 if ((*ar)->flags & USES_ZLIB_COMPRESSION)
313 args->compression_level = compression_level;
314 else {
315 die("Argument not supported for format '%s': -%d",
316 format, compression_level);
317 }
318 }
319 args->verbose = verbose;
320 args->base = base;
321 args->baselen = strlen(base);
322
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]323 return argc;
Rene Scharfec0885432008-07-25 10:41:22[diff] [blame]324}
325
Rene Scharfe6e94e682008-07-25 10:41:21[diff] [blame]326int write_archive(int argc, const char **argv, const char *prefix,
327 int setup_prefix)
328{
329 const struct archiver *ar = NULL;
330 struct archiver_args args;
Rene Scharfe6e94e682008-07-25 10:41:21[diff] [blame]331
Rene Scharfe4fac1d32008-07-25 10:41:26[diff] [blame]332 argc = parse_archive_args(argc, argv, &ar, &args);
Rene Scharfe6e94e682008-07-25 10:41:21[diff] [blame]333 if (setup_prefix && prefix == NULL)
334 prefix = setup_git_directory();
335
Rene Scharfe6e94e682008-07-25 10:41:21[diff] [blame]336 parse_treeish_arg(argv, &args, prefix);
337 parse_pathspec_arg(argv + 1, &args);
338
Charles Baileyddff8562008-10-25 15:38:14[diff] [blame]339 git_config(git_default_config, NULL);
340
Rene Scharfe6e94e682008-07-25 10:41:21[diff] [blame]341 return ar->write_archive(&args);
342}