freshlybakedca.ke
Git fork
1#define USE_THE_REPOSITORY_VARIABLE
2#define DISABLE_SIGN_COMPARE_WARNINGS
3
4#include "git-compat-util.h"
5#include "abspath.h"
6#include "config.h"
7#include "convert.h"
8#include "environment.h"
9#include "gettext.h"
10#include "git-zlib.h"
11#include "hex.h"
12#include "object-name.h"
13#include "path.h"
14#include "pretty.h"
15#include "setup.h"
16#include "refs.h"
17#include "odb.h"
18#include "commit.h"
19#include "tree.h"
20#include "tree-walk.h"
21#include "attr.h"
22#include "archive.h"
23#include "parse-options.h"
24#include "unpack-trees.h"
25#include "quote.h"
26
27static char const * const archive_usage[] = {
28 N_("git archive [<options>] <tree-ish> [<path>...]"),
29 "git archive --list",
30 N_("git archive --remote <repo> [--exec <cmd>] [<options>] <tree-ish> [<path>...]"),
31 N_("git archive --remote <repo> [--exec <cmd>] --list"),
32 NULL
33};
34
35static const struct archiver **archivers;
36static int nr_archivers;
37static int alloc_archivers;
38static int remote_allow_unreachable;
39
40void register_archiver(struct archiver *ar)
41{
42 ALLOC_GROW(archivers, nr_archivers + 1, alloc_archivers);
43 archivers[nr_archivers++] = ar;
44}
45
46void init_archivers(void)
47{
48 init_tar_archiver();
49 init_zip_archiver();
50}
51
52static void format_subst(const struct commit *commit,
53 const char *src, size_t len,
54 struct strbuf *buf, struct pretty_print_context *ctx)
55{
56 char *to_free = NULL;
57 struct strbuf fmt = STRBUF_INIT;
58
59 if (src == buf->buf)
60 to_free = strbuf_detach(buf, NULL);
61 for (;;) {
62 const char *b, *c;
63
64 b = memmem(src, len, "$Format:", 8);
65 if (!b)
66 break;
67 c = memchr(b + 8, '$', (src + len) - b - 8);
68 if (!c)
69 break;
70
71 strbuf_reset(&fmt);
72 strbuf_add(&fmt, b + 8, c - b - 8);
73
74 strbuf_add(buf, src, b - src);
75 repo_format_commit_message(the_repository, commit, fmt.buf,
76 buf, ctx);
77 len -= c + 1 - src;
78 src = c + 1;
79 }
80 strbuf_add(buf, src, len);
81 strbuf_release(&fmt);
82 free(to_free);
83}
84
85static void *object_file_to_archive(const struct archiver_args *args,
86 const char *path,
87 const struct object_id *oid,
88 unsigned int mode,
89 enum object_type *type,
90 unsigned long *sizep)
91{
92 void *buffer;
93 const struct commit *commit = args->convert ? args->commit : NULL;
94 struct checkout_metadata meta;
95
96 init_checkout_metadata(&meta, args->refname,
97 args->commit_oid ? args->commit_oid :
98 (args->tree ? &args->tree->object.oid : NULL), oid);
99
100 path += args->baselen;
101 buffer = odb_read_object(the_repository->objects, oid, type, sizep);
102 if (buffer && S_ISREG(mode)) {
103 struct strbuf buf = STRBUF_INIT;
104 size_t size = 0;
105
106 strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
107 convert_to_working_tree(args->repo->index, path, buf.buf, buf.len, &buf, &meta);
108 if (commit)
109 format_subst(commit, buf.buf, buf.len, &buf, args->pretty_ctx);
110 buffer = strbuf_detach(&buf, &size);
111 *sizep = size;
112 }
113
114 return buffer;
115}
116
117struct directory {
118 struct directory *up;
119 struct object_id oid;
120 int baselen, len;
121 unsigned mode;
122 char path[FLEX_ARRAY];
123};
124
125struct archiver_context {
126 struct archiver_args *args;
127 write_archive_entry_fn_t write_entry;
128 struct directory *bottom;
129};
130
131static const struct attr_check *get_archive_attrs(struct index_state *istate,
132 const char *path)
133{
134 static struct attr_check *check;
135 if (!check)
136 check = attr_check_initl("export-ignore", "export-subst", NULL);
137 git_check_attr(istate, path, check);
138 return check;
139}
140
141static int check_attr_export_ignore(const struct attr_check *check)
142{
143 return check && ATTR_TRUE(check->items[0].value);
144}
145
146static int check_attr_export_subst(const struct attr_check *check)
147{
148 return check && ATTR_TRUE(check->items[1].value);
149}
150
151static int write_archive_entry(const struct object_id *oid, const char *base,
152 int baselen, const char *filename, unsigned mode,
153 void *context)
154{
155 static struct strbuf path = STRBUF_INIT;
156 struct archiver_context *c = context;
157 struct archiver_args *args = c->args;
158 write_archive_entry_fn_t write_entry = c->write_entry;
159 int err;
160 const char *path_without_prefix;
161 unsigned long size;
162 void *buffer;
163 enum object_type type;
164
165 args->convert = 0;
166 strbuf_reset(&path);
167 strbuf_grow(&path, PATH_MAX);
168 strbuf_add(&path, args->base, args->baselen);
169 strbuf_add(&path, base, baselen);
170 strbuf_addstr(&path, filename);
171 if (S_ISDIR(mode) || S_ISGITLINK(mode))
172 strbuf_addch(&path, '/');
173 path_without_prefix = path.buf + args->baselen;
174
175 if (!S_ISDIR(mode)) {
176 const struct attr_check *check;
177 check = get_archive_attrs(args->repo->index, path_without_prefix);
178 if (check_attr_export_ignore(check))
179 return 0;
180 args->convert = check_attr_export_subst(check);
181 }
182
183 if (args->prefix) {
184 static struct strbuf new_path = STRBUF_INIT;
185 static struct strbuf buf = STRBUF_INIT;
186 const char *rel;
187
188 rel = relative_path(path_without_prefix, args->prefix, &buf);
189
190 /*
191 * We don't add an entry for the current working
192 * directory when we are at the root; skip it also when
193 * we're in a subdirectory or submodule. Skip entries
194 * higher up as well.
195 */
196 if (!strcmp(rel, "./") || starts_with(rel, "../"))
197 return S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0;
198
199 /* rel can refer to path, so don't edit it in place */
200 strbuf_reset(&new_path);
201 strbuf_add(&new_path, args->base, args->baselen);
202 strbuf_addstr(&new_path, rel);
203 strbuf_swap(&path, &new_path);
204 }
205
206 if (args->verbose)
207 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
208
209 if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
210 err = write_entry(args, oid, path.buf, path.len, mode, NULL, 0);
211 if (err)
212 return err;
213 return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
214 }
215
216 /* Stream it? */
217 if (S_ISREG(mode) && !args->convert &&
218 odb_read_object_info(args->repo->objects, oid, &size) == OBJ_BLOB &&
219 size > repo_settings_get_big_file_threshold(the_repository))
220 return write_entry(args, oid, path.buf, path.len, mode, NULL, size);
221
222 buffer = object_file_to_archive(args, path.buf, oid, mode, &type, &size);
223 if (!buffer)
224 return error(_("cannot read '%s'"), oid_to_hex(oid));
225 err = write_entry(args, oid, path.buf, path.len, mode, buffer, size);
226 free(buffer);
227 return err;
228}
229
230static void queue_directory(const struct object_id *oid,
231 struct strbuf *base, const char *filename,
232 unsigned mode, struct archiver_context *c)
233{
234 struct directory *d;
235 size_t len = st_add4(base->len, 1, strlen(filename), 1);
236 d = xmalloc(st_add(sizeof(*d), len));
237 d->up = c->bottom;
238 d->baselen = base->len;
239 d->mode = mode;
240 c->bottom = d;
241 d->len = xsnprintf(d->path, len, "%.*s%s/", (int)base->len, base->buf, filename);
242 oidcpy(&d->oid, oid);
243}
244
245static int write_directory(struct archiver_context *c)
246{
247 struct directory *d = c->bottom;
248 int ret;
249
250 if (!d)
251 return 0;
252 c->bottom = d->up;
253 d->path[d->len - 1] = '\0'; /* no trailing slash */
254 ret =
255 write_directory(c) ||
256 write_archive_entry(&d->oid, d->path, d->baselen,
257 d->path + d->baselen, d->mode,
258 c) != READ_TREE_RECURSIVE;
259 free(d);
260 return ret ? -1 : 0;
261}
262
263static int queue_or_write_archive_entry(const struct object_id *oid,
264 struct strbuf *base, const char *filename,
265 unsigned mode, void *context)
266{
267 struct archiver_context *c = context;
268
269 while (c->bottom &&
270 !(base->len >= c->bottom->len &&
271 !strncmp(base->buf, c->bottom->path, c->bottom->len))) {
272 struct directory *next = c->bottom->up;
273 free(c->bottom);
274 c->bottom = next;
275 }
276
277 if (S_ISDIR(mode)) {
278 size_t baselen = base->len;
279 const struct attr_check *check;
280
281 /* Borrow base, but restore its original value when done. */
282 strbuf_addstr(base, filename);
283 strbuf_addch(base, '/');
284 check = get_archive_attrs(c->args->repo->index, base->buf);
285 strbuf_setlen(base, baselen);
286
287 if (check_attr_export_ignore(check))
288 return 0;
289 queue_directory(oid, base, filename, mode, c);
290 return READ_TREE_RECURSIVE;
291 }
292
293 if (write_directory(c))
294 return -1;
295 return write_archive_entry(oid, base->buf, base->len, filename, mode,
296 context);
297}
298
299struct extra_file_info {
300 char *base;
301 struct stat stat;
302 void *content;
303};
304
305int write_archive_entries(struct archiver_args *args,
306 write_archive_entry_fn_t write_entry)
307{
308 struct archiver_context context;
309 int err;
310 struct strbuf path_in_archive = STRBUF_INIT;
311 struct strbuf content = STRBUF_INIT;
312 struct object_id fake_oid;
313 int i;
314
315 oidcpy(&fake_oid, null_oid(the_hash_algo));
316
317 if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
318 size_t len = args->baselen;
319
320 while (len > 1 && args->base[len - 2] == '/')
321 len--;
322 if (args->verbose)
323 fprintf(stderr, "%.*s\n", (int)len, args->base);
324 err = write_entry(args, &args->tree->object.oid, args->base,
325 len, 040777, NULL, 0);
326 if (err)
327 return err;
328 }
329
330 memset(&context, 0, sizeof(context));
331 context.args = args;
332 context.write_entry = write_entry;
333
334 err = read_tree(args->repo, args->tree,
335 &args->pathspec,
336 queue_or_write_archive_entry,
337 &context);
338 if (err == READ_TREE_RECURSIVE)
339 err = 0;
340 while (context.bottom) {
341 struct directory *next = context.bottom->up;
342 free(context.bottom);
343 context.bottom = next;
344 }
345
346 for (i = 0; i < args->extra_files.nr; i++) {
347 struct string_list_item *item = args->extra_files.items + i;
348 char *path = item->string;
349 struct extra_file_info *info = item->util;
350
351 put_be64(fake_oid.hash, i + 1);
352
353 if (!info->content) {
354 strbuf_reset(&path_in_archive);
355 if (info->base)
356 strbuf_addstr(&path_in_archive, info->base);
357 strbuf_addstr(&path_in_archive, basename(path));
358
359 strbuf_reset(&content);
360 if (strbuf_read_file(&content, path, info->stat.st_size) < 0)
361 err = error_errno(_("cannot read '%s'"), path);
362 else
363 err = write_entry(args, &fake_oid, path_in_archive.buf,
364 path_in_archive.len,
365 canon_mode(info->stat.st_mode),
366 content.buf, content.len);
367 } else {
368 err = write_entry(args, &fake_oid,
369 path, strlen(path),
370 canon_mode(info->stat.st_mode),
371 info->content, info->stat.st_size);
372 }
373
374 if (err)
375 break;
376 }
377 strbuf_release(&path_in_archive);
378 strbuf_release(&content);
379
380 return err;
381}
382
383static const struct archiver *lookup_archiver(const char *name)
384{
385 int i;
386
387 if (!name)
388 return NULL;
389
390 for (i = 0; i < nr_archivers; i++) {
391 if (!strcmp(name, archivers[i]->name))
392 return archivers[i];
393 }
394 return NULL;
395}
396
397struct path_exists_context {
398 struct pathspec pathspec;
399 struct archiver_args *args;
400};
401
402static int reject_entry(const struct object_id *oid UNUSED,
403 struct strbuf *base,
404 const char *filename, unsigned mode,
405 void *context)
406{
407 int ret = -1;
408 struct path_exists_context *ctx = context;
409
410 if (S_ISDIR(mode)) {
411 struct strbuf sb = STRBUF_INIT;
412 strbuf_addbuf(&sb, base);
413 strbuf_addstr(&sb, filename);
414 if (!match_pathspec(ctx->args->repo->index,
415 &ctx->pathspec,
416 sb.buf, sb.len, 0, NULL, 1))
417 ret = READ_TREE_RECURSIVE;
418 strbuf_release(&sb);
419 }
420 return ret;
421}
422
423static int reject_outside(const struct object_id *oid UNUSED,
424 struct strbuf *base, const char *filename,
425 unsigned mode, void *context)
426{
427 struct archiver_args *args = context;
428 struct strbuf buf = STRBUF_INIT;
429 struct strbuf path = STRBUF_INIT;
430 int ret = 0;
431
432 if (S_ISDIR(mode))
433 return READ_TREE_RECURSIVE;
434
435 strbuf_addbuf(&path, base);
436 strbuf_addstr(&path, filename);
437 if (starts_with(relative_path(path.buf, args->prefix, &buf), "../"))
438 ret = -1;
439 strbuf_release(&buf);
440 strbuf_release(&path);
441 return ret;
442}
443
444static int path_exists(struct archiver_args *args, const char *path)
445{
446 const char *paths[] = { path, NULL };
447 struct path_exists_context ctx;
448 int ret;
449
450 ctx.args = args;
451 parse_pathspec(&ctx.pathspec, 0, PATHSPEC_PREFER_CWD,
452 args->prefix, paths);
453 ctx.pathspec.recursive = 1;
454 if (args->prefix && read_tree(args->repo, args->tree, &ctx.pathspec,
455 reject_outside, args))
456 die(_("pathspec '%s' matches files outside the "
457 "current directory"), path);
458 ret = read_tree(args->repo, args->tree,
459 &ctx.pathspec,
460 reject_entry, &ctx);
461 clear_pathspec(&ctx.pathspec);
462 return ret != 0;
463}
464
465static void parse_pathspec_arg(const char **pathspec,
466 struct archiver_args *ar_args)
467{
468 /*
469 * must be consistent with parse_pathspec in path_exists()
470 * Also if pathspec patterns are dependent, we're in big
471 * trouble as we test each one separately
472 */
473 parse_pathspec(&ar_args->pathspec, 0, PATHSPEC_PREFER_CWD,
474 ar_args->prefix, pathspec);
475 ar_args->pathspec.recursive = 1;
476 if (pathspec) {
477 while (*pathspec) {
478 if (**pathspec && !path_exists(ar_args, *pathspec))
479 die(_("pathspec '%s' did not match any files"), *pathspec);
480 pathspec++;
481 }
482 }
483}
484
485static void parse_treeish_arg(const char **argv,
486 struct archiver_args *ar_args, int remote)
487{
488 const char *name = argv[0];
489 const struct object_id *commit_oid;
490 time_t archive_time;
491 struct tree *tree;
492 const struct commit *commit;
493 struct object_id oid;
494 char *ref = NULL;
495
496 /* Remotes are only allowed to fetch actual refs */
497 if (remote && !remote_allow_unreachable) {
498 const char *colon = strchrnul(name, ':');
499 int refnamelen = colon - name;
500
501 if (!repo_dwim_ref(the_repository, name, refnamelen, &oid, &ref, 0))
502 die(_("no such ref: %.*s"), refnamelen, name);
503 } else {
504 repo_dwim_ref(the_repository, name, strlen(name), &oid, &ref,
505 0);
506 }
507
508 if (repo_get_oid(the_repository, name, &oid))
509 die(_("not a valid object name: %s"), name);
510
511 commit = lookup_commit_reference_gently(ar_args->repo, &oid, 1);
512 if (commit) {
513 commit_oid = &commit->object.oid;
514 archive_time = commit->date;
515 } else {
516 commit_oid = NULL;
517 archive_time = time(NULL);
518 }
519 if (ar_args->mtime_option)
520 archive_time = approxidate(ar_args->mtime_option);
521
522 tree = parse_tree_indirect(&oid);
523 if (!tree)
524 die(_("not a tree object: %s"), oid_to_hex(&oid));
525
526 /*
527 * Setup index and instruct attr to read index only
528 */
529 if (!ar_args->worktree_attributes) {
530 struct unpack_trees_options opts;
531 struct tree_desc t;
532
533 memset(&opts, 0, sizeof(opts));
534 opts.index_only = 1;
535 opts.head_idx = -1;
536 opts.src_index = ar_args->repo->index;
537 opts.dst_index = ar_args->repo->index;
538 opts.fn = oneway_merge;
539 init_tree_desc(&t, &tree->object.oid, tree->buffer, tree->size);
540 if (unpack_trees(1, &t, &opts))
541 die(_("failed to unpack tree object %s"),
542 oid_to_hex(&tree->object.oid));
543
544 git_attr_set_direction(GIT_ATTR_INDEX);
545 }
546
547 ar_args->refname = ref;
548 ar_args->tree = tree;
549 ar_args->commit_oid = commit_oid;
550 ar_args->commit = commit;
551 ar_args->time = archive_time;
552}
553
554static void extra_file_info_clear(void *util, const char *str UNUSED)
555{
556 struct extra_file_info *info = util;
557 free(info->base);
558 free(info->content);
559 free(info);
560}
561
562static int add_file_cb(const struct option *opt, const char *arg, int unset)
563{
564 struct archiver_args *args = opt->value;
565 const char **basep = (const char **)opt->defval;
566 const char *base = *basep;
567 char *path;
568 struct string_list_item *item;
569 struct extra_file_info *info;
570
571 if (unset) {
572 string_list_clear_func(&args->extra_files,
573 extra_file_info_clear);
574 return 0;
575 }
576
577 if (!arg)
578 return -1;
579
580 info = xmalloc(sizeof(*info));
581 info->base = xstrdup_or_null(base);
582
583 if (!strcmp(opt->long_name, "add-file")) {
584 path = prefix_filename(args->prefix, arg);
585 if (stat(path, &info->stat))
586 die(_("File not found: %s"), path);
587 if (!S_ISREG(info->stat.st_mode))
588 die(_("Not a regular file: %s"), path);
589 info->content = NULL; /* read the file later */
590 } else if (!strcmp(opt->long_name, "add-virtual-file")) {
591 struct strbuf buf = STRBUF_INIT;
592 const char *p = arg;
593
594 if (*p != '"')
595 p = strchr(p, ':');
596 else if (unquote_c_style(&buf, p, &p) < 0)
597 die(_("unclosed quote: '%s'"), arg);
598
599 if (!p || *p != ':')
600 die(_("missing colon: '%s'"), arg);
601
602 if (p == arg)
603 die(_("empty file name: '%s'"), arg);
604
605 path = buf.len ?
606 strbuf_detach(&buf, NULL) : xstrndup(arg, p - arg);
607
608 if (args->prefix) {
609 char *save = path;
610 path = prefix_filename(args->prefix, path);
611 free(save);
612 }
613 memset(&info->stat, 0, sizeof(info->stat));
614 info->stat.st_mode = S_IFREG | 0644;
615 info->content = xstrdup(p + 1);
616 info->stat.st_size = strlen(info->content);
617 } else {
618 BUG("add_file_cb() called for %s", opt->long_name);
619 }
620 item = string_list_append_nodup(&args->extra_files, path);
621 item->util = info;
622
623 return 0;
624}
625
626static int number_callback(const struct option *opt, const char *arg, int unset)
627{
628 BUG_ON_OPT_NEG(unset);
629 *(int *)opt->value = strtol(arg, NULL, 10);
630 return 0;
631}
632
633static int parse_archive_args(int argc, const char **argv,
634 const struct archiver **ar, struct archiver_args *args,
635 const char *name_hint, int is_remote)
636{
637 const char *format = NULL;
638 const char *base = NULL;
639 const char *remote = NULL;
640 const char *exec = NULL;
641 const char *output = NULL;
642 const char *mtime_option = NULL;
643 int compression_level = -1;
644 int verbose = 0;
645 int i;
646 int list = 0;
647 int worktree_attributes = 0;
648 struct option opts[] = {
649 OPT_GROUP(""),
650 OPT_STRING(0, "format", &format, N_("fmt"), N_("archive format")),
651 OPT_STRING(0, "prefix", &base, N_("prefix"),
652 N_("prepend prefix to each pathname in the archive")),
653 {
654 .type = OPTION_CALLBACK,
655 .long_name = "add-file",
656 .value = args,
657 .argh = N_("file"),
658 .help = N_("add untracked file to archive"),
659 .callback = add_file_cb,
660 .defval = (intptr_t) &base,
661 },
662 {
663 .type = OPTION_CALLBACK,
664 .long_name = "add-virtual-file",
665 .value = args,
666 .argh = N_("path:content"),
667 .help = N_("add untracked file to archive"),
668 .callback = add_file_cb,
669 .defval = (intptr_t) &base,
670 },
671 OPT_STRING('o', "output", &output, N_("file"),
672 N_("write the archive to this file")),
673 OPT_BOOL(0, "worktree-attributes", &worktree_attributes,
674 N_("read .gitattributes in working directory")),
675 OPT__VERBOSE(&verbose, N_("report archived files on stderr")),
676 {
677 .type = OPTION_STRING,
678 .long_name = "mtime",
679 .value = &mtime_option,
680 .argh = N_("time"),
681 .help = N_("set modification time of archive entries"),
682 .flags = PARSE_OPT_NONEG,
683 },
684 OPT_NUMBER_CALLBACK(&compression_level,
685 N_("set compression level"), number_callback),
686 OPT_GROUP(""),
687 OPT_BOOL('l', "list", &list,
688 N_("list supported archive formats")),
689 OPT_GROUP(""),
690 OPT_STRING(0, "remote", &remote, N_("repo"),
691 N_("retrieve the archive from remote repository <repo>")),
692 OPT_STRING(0, "exec", &exec, N_("command"),
693 N_("path to the remote git-upload-archive command")),
694 OPT_END()
695 };
696
697 argc = parse_options(argc, argv, NULL, opts, archive_usage, 0);
698
699 if (remote)
700 die(_("Unexpected option --remote"));
701 if (exec)
702 die(_("the option '%s' requires '%s'"), "--exec", "--remote");
703 if (output)
704 die(_("Unexpected option --output"));
705 if (is_remote && args->extra_files.nr)
706 die(_("options '%s' and '%s' cannot be used together"), "--add-file", "--remote");
707
708 if (!base)
709 base = "";
710
711 if (list) {
712 if (argc)
713 die(_("extra command line parameter '%s'"), *argv);
714 for (i = 0; i < nr_archivers; i++)
715 if (!is_remote || archivers[i]->flags & ARCHIVER_REMOTE)
716 printf("%s\n", archivers[i]->name);
717 exit(0);
718 }
719
720 if (!format && name_hint)
721 format = archive_format_from_filename(name_hint);
722 if (!format)
723 format = "tar";
724
725 /* We need at least one parameter -- tree-ish */
726 if (argc < 1)
727 usage_with_options(archive_usage, opts);
728 *ar = lookup_archiver(format);
729 if (!*ar || (is_remote && !((*ar)->flags & ARCHIVER_REMOTE)))
730 die(_("Unknown archive format '%s'"), format);
731
732 args->compression_level = Z_DEFAULT_COMPRESSION;
733 if (compression_level != -1) {
734 int levels_ok = (*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS;
735 int high_ok = (*ar)->flags & ARCHIVER_HIGH_COMPRESSION_LEVELS;
736 if (levels_ok && (compression_level <= 9 || high_ok))
737 args->compression_level = compression_level;
738 else {
739 die(_("Argument not supported for format '%s': -%d"),
740 format, compression_level);
741 }
742 }
743 args->verbose = verbose;
744 args->base = base;
745 args->baselen = strlen(base);
746 args->worktree_attributes = worktree_attributes;
747 args->mtime_option = mtime_option;
748
749 return argc;
750}
751
752int write_archive(int argc, const char **argv, const char *prefix,
753 struct repository *repo,
754 const char *name_hint, int remote)
755{
756 const struct archiver *ar = NULL;
757 struct pretty_print_describe_status describe_status = {0};
758 struct pretty_print_context ctx = {0};
759 struct archiver_args args;
760 const char **argv_copy;
761 int rc;
762
763 repo_config_get_bool(the_repository, "uploadarchive.allowunreachable", &remote_allow_unreachable);
764 repo_config(the_repository, git_default_config, NULL);
765
766 describe_status.max_invocations = 1;
767 ctx.date_mode.type = DATE_NORMAL;
768 ctx.abbrev = DEFAULT_ABBREV;
769 ctx.describe_status = &describe_status;
770 args.pretty_ctx = &ctx;
771 args.repo = repo;
772 args.prefix = prefix;
773 string_list_init_dup(&args.extra_files);
774
775 /*
776 * `parse_archive_args()` modifies contents of `argv`, which is what we
777 * want. Our callers may not want it though, so we create a copy here.
778 */
779 DUP_ARRAY(argv_copy, argv, argc);
780 argv = argv_copy;
781
782 argc = parse_archive_args(argc, argv, &ar, &args, name_hint, remote);
783 if (!startup_info->have_repository) {
784 /*
785 * We know this will die() with an error, so we could just
786 * die ourselves; but its error message will be more specific
787 * than what we could write here.
788 */
789 setup_git_directory();
790 }
791
792 parse_treeish_arg(argv, &args, remote);
793 parse_pathspec_arg(argv + 1, &args);
794
795 rc = ar->write_archive(ar, &args);
796
797 string_list_clear_func(&args.extra_files, extra_file_info_clear);
798 free(args.refname);
799 clear_pathspec(&args.pathspec);
800 free(argv_copy);
801
802 return rc;
803}
804
805static int match_extension(const char *filename, const char *ext)
806{
807 int prefixlen = strlen(filename) - strlen(ext);
808
809 /*
810 * We need 1 character for the '.', and 1 character to ensure that the
811 * prefix is non-empty (k.e., we don't match .tar.gz with no actual
812 * filename).
813 */
814 if (prefixlen < 2 || filename[prefixlen - 1] != '.')
815 return 0;
816 return !strcmp(filename + prefixlen, ext);
817}
818
819const char *archive_format_from_filename(const char *filename)
820{
821 int i;
822
823 for (i = 0; i < nr_archivers; i++)
824 if (match_extension(filename, archivers[i]->name))
825 return archivers[i]->name;
826 return NULL;
827}