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Commit | Line | Data |
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18125644 LH |
1 | #include "cache.h" |
2 | #include "commit.h" | |
c0885435 | 3 | #include "tree-walk.h" |
18125644 | 4 | #include "attr.h" |
562e25ab | 5 | #include "archive.h" |
4fac1d3a | 6 | #include "parse-options.h" |
ba053ea9 | 7 | #include "unpack-trees.h" |
4fac1d3a RS |
8 | |
9 | static char const * const archive_usage[] = { | |
0012a387 NTND |
10 | N_("git archive [options] <tree-ish> [<path>...]"), |
11 | N_("git archive --list"), | |
12 | N_("git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [<path>...]"), | |
13 | N_("git archive --remote <repo> [--exec <cmd>] --list"), | |
4fac1d3a RS |
14 | NULL |
15 | }; | |
c0885435 | 16 | |
13e0f88d JK |
17 | static const struct archiver **archivers; |
18 | static int nr_archivers; | |
19 | static int alloc_archivers; | |
20 | ||
21 | void register_archiver(struct archiver *ar) | |
22 | { | |
23 | ALLOC_GROW(archivers, nr_archivers + 1, alloc_archivers); | |
24 | archivers[nr_archivers++] = ar; | |
25 | } | |
c0885435 | 26 | |
18125644 LH |
27 | static void format_subst(const struct commit *commit, |
28 | const char *src, size_t len, | |
29 | struct strbuf *buf) | |
30 | { | |
31 | char *to_free = NULL; | |
f285a2d7 | 32 | struct strbuf fmt = STRBUF_INIT; |
dd2e794a TR |
33 | struct pretty_print_context ctx = {0}; |
34 | ctx.date_mode = DATE_NORMAL; | |
35039ced | 35 | ctx.abbrev = DEFAULT_ABBREV; |
18125644 LH |
36 | |
37 | if (src == buf->buf) | |
38 | to_free = strbuf_detach(buf, NULL); | |
18125644 LH |
39 | for (;;) { |
40 | const char *b, *c; | |
41 | ||
42 | b = memmem(src, len, "$Format:", 8); | |
75b7dfbd | 43 | if (!b) |
18125644 | 44 | break; |
75b7dfbd | 45 | c = memchr(b + 8, '$', (src + len) - b - 8); |
18125644 LH |
46 | if (!c) |
47 | break; | |
48 | ||
49 | strbuf_reset(&fmt); | |
50 | strbuf_add(&fmt, b + 8, c - b - 8); | |
51 | ||
52 | strbuf_add(buf, src, b - src); | |
dd2e794a | 53 | format_commit_message(commit, fmt.buf, buf, &ctx); |
18125644 LH |
54 | len -= c + 1 - src; |
55 | src = c + 1; | |
56 | } | |
57 | strbuf_add(buf, src, len); | |
58 | strbuf_release(&fmt); | |
59 | free(to_free); | |
60 | } | |
61 | ||
9cb513b7 NTND |
62 | void *sha1_file_to_archive(const struct archiver_args *args, |
63 | const char *path, const unsigned char *sha1, | |
64 | unsigned int mode, enum object_type *type, | |
65 | unsigned long *sizep) | |
18125644 LH |
66 | { |
67 | void *buffer; | |
9cb513b7 | 68 | const struct commit *commit = args->convert ? args->commit : NULL; |
18125644 | 69 | |
9cb513b7 | 70 | path += args->baselen; |
18125644 LH |
71 | buffer = read_sha1_file(sha1, type, sizep); |
72 | if (buffer && S_ISREG(mode)) { | |
f285a2d7 | 73 | struct strbuf buf = STRBUF_INIT; |
18125644 LH |
74 | size_t size = 0; |
75 | ||
18125644 LH |
76 | strbuf_attach(&buf, buffer, *sizep, *sizep + 1); |
77 | convert_to_working_tree(path, buf.buf, buf.len, &buf); | |
1d11d5bb RS |
78 | if (commit) |
79 | format_subst(commit, buf.buf, buf.len, &buf); | |
18125644 LH |
80 | buffer = strbuf_detach(&buf, &size); |
81 | *sizep = size; | |
82 | } | |
83 | ||
84 | return buffer; | |
85 | } | |
86 | ||
1d11d5bb | 87 | static void setup_archive_check(struct git_attr_check *check) |
008d896d RS |
88 | { |
89 | static struct git_attr *attr_export_ignore; | |
1d11d5bb | 90 | static struct git_attr *attr_export_subst; |
008d896d | 91 | |
1d11d5bb | 92 | if (!attr_export_ignore) { |
7fb0eaa2 JH |
93 | attr_export_ignore = git_attr("export-ignore"); |
94 | attr_export_subst = git_attr("export-subst"); | |
1d11d5bb | 95 | } |
008d896d | 96 | check[0].attr = attr_export_ignore; |
1d11d5bb | 97 | check[1].attr = attr_export_subst; |
008d896d | 98 | } |
562e25ab RS |
99 | |
100 | struct archiver_context { | |
101 | struct archiver_args *args; | |
102 | write_archive_entry_fn_t write_entry; | |
103 | }; | |
104 | ||
105 | static int write_archive_entry(const unsigned char *sha1, const char *base, | |
106 | int baselen, const char *filename, unsigned mode, int stage, | |
107 | void *context) | |
108 | { | |
109 | static struct strbuf path = STRBUF_INIT; | |
110 | struct archiver_context *c = context; | |
111 | struct archiver_args *args = c->args; | |
112 | write_archive_entry_fn_t write_entry = c->write_entry; | |
1d11d5bb RS |
113 | struct git_attr_check check[2]; |
114 | const char *path_without_prefix; | |
562e25ab | 115 | int err; |
562e25ab | 116 | |
9cb513b7 | 117 | args->convert = 0; |
562e25ab RS |
118 | strbuf_reset(&path); |
119 | strbuf_grow(&path, PATH_MAX); | |
ebfbdb34 | 120 | strbuf_add(&path, args->base, args->baselen); |
562e25ab RS |
121 | strbuf_add(&path, base, baselen); |
122 | strbuf_addstr(&path, filename); | |
1d11d5bb | 123 | path_without_prefix = path.buf + args->baselen; |
562e25ab | 124 | |
1d11d5bb | 125 | setup_archive_check(check); |
d932f4eb | 126 | if (!git_check_attr(path_without_prefix, ARRAY_SIZE(check), check)) { |
1d11d5bb RS |
127 | if (ATTR_TRUE(check[0].value)) |
128 | return 0; | |
9cb513b7 | 129 | args->convert = ATTR_TRUE(check[1].value); |
1d11d5bb | 130 | } |
562e25ab RS |
131 | |
132 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
133 | strbuf_addch(&path, '/'); | |
134 | if (args->verbose) | |
135 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
9cb513b7 | 136 | err = write_entry(args, sha1, path.buf, path.len, mode); |
562e25ab RS |
137 | if (err) |
138 | return err; | |
d3bee161 | 139 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
562e25ab RS |
140 | } |
141 | ||
562e25ab RS |
142 | if (args->verbose) |
143 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
9cb513b7 | 144 | return write_entry(args, sha1, path.buf, path.len, mode); |
562e25ab RS |
145 | } |
146 | ||
147 | int write_archive_entries(struct archiver_args *args, | |
148 | write_archive_entry_fn_t write_entry) | |
149 | { | |
150 | struct archiver_context context; | |
ba053ea9 NTND |
151 | struct unpack_trees_options opts; |
152 | struct tree_desc t; | |
f0096c06 | 153 | struct pathspec pathspec; |
562e25ab RS |
154 | int err; |
155 | ||
156 | if (args->baselen > 0 && args->base[args->baselen - 1] == '/') { | |
157 | size_t len = args->baselen; | |
158 | ||
159 | while (len > 1 && args->base[len - 2] == '/') | |
160 | len--; | |
161 | if (args->verbose) | |
162 | fprintf(stderr, "%.*s\n", (int)len, args->base); | |
163 | err = write_entry(args, args->tree->object.sha1, args->base, | |
9cb513b7 | 164 | len, 040777); |
562e25ab RS |
165 | if (err) |
166 | return err; | |
167 | } | |
168 | ||
169 | context.args = args; | |
170 | context.write_entry = write_entry; | |
171 | ||
ba053ea9 NTND |
172 | /* |
173 | * Setup index and instruct attr to read index only | |
174 | */ | |
175 | if (!args->worktree_attributes) { | |
176 | memset(&opts, 0, sizeof(opts)); | |
177 | opts.index_only = 1; | |
178 | opts.head_idx = -1; | |
179 | opts.src_index = &the_index; | |
180 | opts.dst_index = &the_index; | |
181 | opts.fn = oneway_merge; | |
182 | init_tree_desc(&t, args->tree->buffer, args->tree->size); | |
183 | if (unpack_trees(1, &t, &opts)) | |
184 | return -1; | |
185 | git_attr_set_direction(GIT_ATTR_INDEX, &the_index); | |
186 | } | |
187 | ||
f0096c06 NTND |
188 | init_pathspec(&pathspec, args->pathspec); |
189 | err = read_tree_recursive(args->tree, "", 0, 0, &pathspec, | |
ebfbdb34 | 190 | write_archive_entry, &context); |
f0096c06 | 191 | free_pathspec(&pathspec); |
562e25ab RS |
192 | if (err == READ_TREE_RECURSIVE) |
193 | err = 0; | |
194 | return err; | |
195 | } | |
6e94e683 | 196 | |
c0885435 RS |
197 | static const struct archiver *lookup_archiver(const char *name) |
198 | { | |
199 | int i; | |
200 | ||
4fac1d3a RS |
201 | if (!name) |
202 | return NULL; | |
203 | ||
13e0f88d JK |
204 | for (i = 0; i < nr_archivers; i++) { |
205 | if (!strcmp(name, archivers[i]->name)) | |
206 | return archivers[i]; | |
c0885435 RS |
207 | } |
208 | return NULL; | |
209 | } | |
210 | ||
d5f53d6d RS |
211 | static int reject_entry(const unsigned char *sha1, const char *base, |
212 | int baselen, const char *filename, unsigned mode, | |
213 | int stage, void *context) | |
214 | { | |
215 | return -1; | |
216 | } | |
217 | ||
218 | static int path_exists(struct tree *tree, const char *path) | |
219 | { | |
f0096c06 NTND |
220 | const char *paths[] = { path, NULL }; |
221 | struct pathspec pathspec; | |
222 | int ret; | |
223 | ||
224 | init_pathspec(&pathspec, paths); | |
225 | ret = read_tree_recursive(tree, "", 0, 0, &pathspec, reject_entry, NULL); | |
226 | free_pathspec(&pathspec); | |
227 | return ret != 0; | |
d5f53d6d RS |
228 | } |
229 | ||
c0885435 RS |
230 | static void parse_pathspec_arg(const char **pathspec, |
231 | struct archiver_args *ar_args) | |
232 | { | |
d5f53d6d RS |
233 | ar_args->pathspec = pathspec = get_pathspec("", pathspec); |
234 | if (pathspec) { | |
235 | while (*pathspec) { | |
236 | if (!path_exists(ar_args->tree, *pathspec)) | |
237 | die("path not found: %s", *pathspec); | |
238 | pathspec++; | |
239 | } | |
240 | } | |
c0885435 RS |
241 | } |
242 | ||
243 | static void parse_treeish_arg(const char **argv, | |
ee27ca4a JK |
244 | struct archiver_args *ar_args, const char *prefix, |
245 | int remote) | |
c0885435 RS |
246 | { |
247 | const char *name = argv[0]; | |
248 | const unsigned char *commit_sha1; | |
249 | time_t archive_time; | |
250 | struct tree *tree; | |
251 | const struct commit *commit; | |
252 | unsigned char sha1[20]; | |
253 | ||
ee27ca4a JK |
254 | /* Remotes are only allowed to fetch actual refs */ |
255 | if (remote) { | |
256 | char *ref = NULL; | |
c51a351a RS |
257 | const char *colon = strchr(name, ':'); |
258 | int refnamelen = colon ? colon - name : strlen(name); | |
259 | ||
260 | if (!dwim_ref(name, refnamelen, sha1, &ref)) | |
261 | die("no such ref: %.*s", refnamelen, name); | |
ee27ca4a JK |
262 | free(ref); |
263 | } | |
0f544ee8 CMN |
264 | |
265 | if (get_sha1(name, sha1)) | |
266 | die("Not a valid object name"); | |
c0885435 RS |
267 | |
268 | commit = lookup_commit_reference_gently(sha1, 1); | |
269 | if (commit) { | |
270 | commit_sha1 = commit->object.sha1; | |
271 | archive_time = commit->date; | |
272 | } else { | |
273 | commit_sha1 = NULL; | |
274 | archive_time = time(NULL); | |
275 | } | |
276 | ||
277 | tree = parse_tree_indirect(sha1); | |
278 | if (tree == NULL) | |
279 | die("not a tree object"); | |
280 | ||
281 | if (prefix) { | |
282 | unsigned char tree_sha1[20]; | |
283 | unsigned int mode; | |
284 | int err; | |
285 | ||
286 | err = get_tree_entry(tree->object.sha1, prefix, | |
287 | tree_sha1, &mode); | |
288 | if (err || !S_ISDIR(mode)) | |
289 | die("current working directory is untracked"); | |
290 | ||
291 | tree = parse_tree_indirect(tree_sha1); | |
292 | } | |
293 | ar_args->tree = tree; | |
294 | ar_args->commit_sha1 = commit_sha1; | |
295 | ar_args->commit = commit; | |
296 | ar_args->time = archive_time; | |
297 | } | |
298 | ||
4fac1d3a RS |
299 | #define OPT__COMPR(s, v, h, p) \ |
300 | { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \ | |
301 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) } | |
302 | #define OPT__COMPR_HIDDEN(s, v, p) \ | |
303 | { OPTION_SET_INT, (s), NULL, (v), NULL, "", \ | |
304 | PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) } | |
305 | ||
c0885435 | 306 | static int parse_archive_args(int argc, const char **argv, |
56baa61d | 307 | const struct archiver **ar, struct archiver_args *args, |
7b97730b | 308 | const char *name_hint, int is_remote) |
c0885435 | 309 | { |
56baa61d | 310 | const char *format = NULL; |
4fac1d3a RS |
311 | const char *base = NULL; |
312 | const char *remote = NULL; | |
313 | const char *exec = NULL; | |
aec0c1bb | 314 | const char *output = NULL; |
c0885435 RS |
315 | int compression_level = -1; |
316 | int verbose = 0; | |
317 | int i; | |
4fac1d3a | 318 | int list = 0; |
ba053ea9 | 319 | int worktree_attributes = 0; |
4fac1d3a RS |
320 | struct option opts[] = { |
321 | OPT_GROUP(""), | |
0012a387 NTND |
322 | OPT_STRING(0, "format", &format, N_("fmt"), N_("archive format")), |
323 | OPT_STRING(0, "prefix", &base, N_("prefix"), | |
324 | N_("prepend prefix to each pathname in the archive")), | |
325 | OPT_STRING('o', "output", &output, N_("file"), | |
326 | N_("write the archive to this file")), | |
f858c646 | 327 | OPT_BOOL(0, "worktree-attributes", &worktree_attributes, |
0012a387 NTND |
328 | N_("read .gitattributes in working directory")), |
329 | OPT__VERBOSE(&verbose, N_("report archived files on stderr")), | |
330 | OPT__COMPR('0', &compression_level, N_("store only"), 0), | |
331 | OPT__COMPR('1', &compression_level, N_("compress faster"), 1), | |
4fac1d3a RS |
332 | OPT__COMPR_HIDDEN('2', &compression_level, 2), |
333 | OPT__COMPR_HIDDEN('3', &compression_level, 3), | |
334 | OPT__COMPR_HIDDEN('4', &compression_level, 4), | |
335 | OPT__COMPR_HIDDEN('5', &compression_level, 5), | |
336 | OPT__COMPR_HIDDEN('6', &compression_level, 6), | |
337 | OPT__COMPR_HIDDEN('7', &compression_level, 7), | |
338 | OPT__COMPR_HIDDEN('8', &compression_level, 8), | |
0012a387 | 339 | OPT__COMPR('9', &compression_level, N_("compress better"), 9), |
4fac1d3a | 340 | OPT_GROUP(""), |
f858c646 | 341 | OPT_BOOL('l', "list", &list, |
0012a387 | 342 | N_("list supported archive formats")), |
4fac1d3a | 343 | OPT_GROUP(""), |
0012a387 NTND |
344 | OPT_STRING(0, "remote", &remote, N_("repo"), |
345 | N_("retrieve the archive from remote repository <repo>")), | |
b0ff9654 | 346 | OPT_STRING(0, "exec", &exec, N_("command"), |
0012a387 | 347 | N_("path to the remote git-upload-archive command")), |
4fac1d3a RS |
348 | OPT_END() |
349 | }; | |
350 | ||
37782920 | 351 | argc = parse_options(argc, argv, NULL, opts, archive_usage, 0); |
4fac1d3a RS |
352 | |
353 | if (remote) | |
354 | die("Unexpected option --remote"); | |
355 | if (exec) | |
356 | die("Option --exec can only be used together with --remote"); | |
52e77876 RS |
357 | if (output) |
358 | die("Unexpected option --output"); | |
4fac1d3a RS |
359 | |
360 | if (!base) | |
361 | base = ""; | |
362 | ||
363 | if (list) { | |
13e0f88d | 364 | for (i = 0; i < nr_archivers; i++) |
7b97730b JK |
365 | if (!is_remote || archivers[i]->flags & ARCHIVER_REMOTE) |
366 | printf("%s\n", archivers[i]->name); | |
4fac1d3a | 367 | exit(0); |
c0885435 RS |
368 | } |
369 | ||
56baa61d JK |
370 | if (!format && name_hint) |
371 | format = archive_format_from_filename(name_hint); | |
372 | if (!format) | |
373 | format = "tar"; | |
374 | ||
c0885435 | 375 | /* We need at least one parameter -- tree-ish */ |
4fac1d3a RS |
376 | if (argc < 1) |
377 | usage_with_options(archive_usage, opts); | |
c0885435 | 378 | *ar = lookup_archiver(format); |
7b97730b | 379 | if (!*ar || (is_remote && !((*ar)->flags & ARCHIVER_REMOTE))) |
c0885435 RS |
380 | die("Unknown archive format '%s'", format); |
381 | ||
382 | args->compression_level = Z_DEFAULT_COMPRESSION; | |
383 | if (compression_level != -1) { | |
13e0f88d | 384 | if ((*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS) |
c0885435 RS |
385 | args->compression_level = compression_level; |
386 | else { | |
387 | die("Argument not supported for format '%s': -%d", | |
388 | format, compression_level); | |
389 | } | |
390 | } | |
391 | args->verbose = verbose; | |
392 | args->base = base; | |
393 | args->baselen = strlen(base); | |
ba053ea9 | 394 | args->worktree_attributes = worktree_attributes; |
c0885435 | 395 | |
4fac1d3a | 396 | return argc; |
c0885435 RS |
397 | } |
398 | ||
6e94e683 | 399 | int write_archive(int argc, const char **argv, const char *prefix, |
7b97730b | 400 | int setup_prefix, const char *name_hint, int remote) |
6e94e683 | 401 | { |
23212862 | 402 | int nongit = 0; |
6e94e683 RS |
403 | const struct archiver *ar = NULL; |
404 | struct archiver_args args; | |
6e94e683 | 405 | |
6e94e683 | 406 | if (setup_prefix && prefix == NULL) |
23212862 JK |
407 | prefix = setup_git_directory_gently(&nongit); |
408 | ||
409 | git_config(git_default_config, NULL); | |
13e0f88d JK |
410 | init_tar_archiver(); |
411 | init_zip_archiver(); | |
23212862 | 412 | |
7b97730b | 413 | argc = parse_archive_args(argc, argv, &ar, &args, name_hint, remote); |
23212862 JK |
414 | if (nongit) { |
415 | /* | |
416 | * We know this will die() with an error, so we could just | |
417 | * die ourselves; but its error message will be more specific | |
418 | * than what we could write here. | |
419 | */ | |
420 | setup_git_directory(); | |
421 | } | |
6e94e683 | 422 | |
ee27ca4a | 423 | parse_treeish_arg(argv, &args, prefix, remote); |
6e94e683 RS |
424 | parse_pathspec_arg(argv + 1, &args); |
425 | ||
4d7c9898 | 426 | return ar->write_archive(ar, &args); |
6e94e683 | 427 | } |
56baa61d | 428 | |
08716b3c JK |
429 | static int match_extension(const char *filename, const char *ext) |
430 | { | |
431 | int prefixlen = strlen(filename) - strlen(ext); | |
432 | ||
433 | /* | |
434 | * We need 1 character for the '.', and 1 character to ensure that the | |
435 | * prefix is non-empty (k.e., we don't match .tar.gz with no actual | |
436 | * filename). | |
437 | */ | |
438 | if (prefixlen < 2 || filename[prefixlen-1] != '.') | |
439 | return 0; | |
440 | return !strcmp(filename + prefixlen, ext); | |
441 | } | |
442 | ||
56baa61d JK |
443 | const char *archive_format_from_filename(const char *filename) |
444 | { | |
08716b3c JK |
445 | int i; |
446 | ||
447 | for (i = 0; i < nr_archivers; i++) | |
448 | if (match_extension(filename, archivers[i]->name)) | |
449 | return archivers[i]->name; | |
56baa61d JK |
450 | return NULL; |
451 | } |