7 static const char archive_usage[] = \
8 "git archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
10 #define USES_ZLIB_COMPRESSION 1
12 const struct archiver {
14 write_archive_fn_t write_archive;
17 { "tar", write_tar_archive },
18 { "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
21 static void format_subst(const struct commit *commit,
22 const char *src, size_t len,
29 to_free = strbuf_detach(buf, NULL);
34 b = memmem(src, len, "$Format:", 8);
37 c = memchr(b + 8, '$', (src + len) - b - 8);
42 strbuf_add(&fmt, b + 8, c - b - 8);
44 strbuf_add(buf, src, b - src);
45 format_commit_message(commit, fmt.buf, buf);
49 strbuf_add(buf, src, len);
54 static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
55 unsigned int mode, enum object_type *type,
56 unsigned long *sizep, const struct commit *commit)
60 buffer = read_sha1_file(sha1, type, sizep);
61 if (buffer && S_ISREG(mode)) {
66 strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
67 convert_to_working_tree(path, buf.buf, buf.len, &buf);
69 format_subst(commit, buf.buf, buf.len, &buf);
70 buffer = strbuf_detach(&buf, &size);
77 static void setup_archive_check(struct git_attr_check *check)
79 static struct git_attr *attr_export_ignore;
80 static struct git_attr *attr_export_subst;
82 if (!attr_export_ignore) {
83 attr_export_ignore = git_attr("export-ignore", 13);
84 attr_export_subst = git_attr("export-subst", 12);
86 check[0].attr = attr_export_ignore;
87 check[1].attr = attr_export_subst;
90 struct archiver_context {
91 struct archiver_args *args;
92 write_archive_entry_fn_t write_entry;
95 static int write_archive_entry(const unsigned char *sha1, const char *base,
96 int baselen, const char *filename, unsigned mode, int stage,
99 static struct strbuf path = STRBUF_INIT;
100 struct archiver_context *c = context;
101 struct archiver_args *args = c->args;
102 write_archive_entry_fn_t write_entry = c->write_entry;
103 struct git_attr_check check[2];
104 const char *path_without_prefix;
107 enum object_type type;
112 strbuf_grow(&path, PATH_MAX);
113 strbuf_add(&path, base, baselen);
114 strbuf_addstr(&path, filename);
115 path_without_prefix = path.buf + args->baselen;
117 setup_archive_check(check);
118 if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
119 if (ATTR_TRUE(check[0].value))
121 convert = ATTR_TRUE(check[1].value);
124 if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
125 strbuf_addch(&path, '/');
127 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
128 err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
131 return READ_TREE_RECURSIVE;
134 buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
135 &type, &size, convert ? args->commit : NULL);
137 return error("cannot read %s", sha1_to_hex(sha1));
139 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
140 err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
145 int write_archive_entries(struct archiver_args *args,
146 write_archive_entry_fn_t write_entry)
148 struct archiver_context context;
151 if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
152 size_t len = args->baselen;
154 while (len > 1 && args->base[len - 2] == '/')
157 fprintf(stderr, "%.*s\n", (int)len, args->base);
158 err = write_entry(args, args->tree->object.sha1, args->base,
159 len, 040777, NULL, 0);
165 context.write_entry = write_entry;
167 err = read_tree_recursive(args->tree, args->base, args->baselen, 0,
168 args->pathspec, write_archive_entry, &context);
169 if (err == READ_TREE_RECURSIVE)
174 static const struct archiver *lookup_archiver(const char *name)
178 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
179 if (!strcmp(name, archivers[i].name))
180 return &archivers[i];
185 static void parse_pathspec_arg(const char **pathspec,
186 struct archiver_args *ar_args)
188 ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
191 static void parse_treeish_arg(const char **argv,
192 struct archiver_args *ar_args, const char *prefix)
194 const char *name = argv[0];
195 const unsigned char *commit_sha1;
198 const struct commit *commit;
199 unsigned char sha1[20];
201 if (get_sha1(name, sha1))
202 die("Not a valid object name");
204 commit = lookup_commit_reference_gently(sha1, 1);
206 commit_sha1 = commit->object.sha1;
207 archive_time = commit->date;
210 archive_time = time(NULL);
213 tree = parse_tree_indirect(sha1);
215 die("not a tree object");
218 unsigned char tree_sha1[20];
222 err = get_tree_entry(tree->object.sha1, prefix,
224 if (err || !S_ISDIR(mode))
225 die("current working directory is untracked");
227 tree = parse_tree_indirect(tree_sha1);
229 ar_args->tree = tree;
230 ar_args->commit_sha1 = commit_sha1;
231 ar_args->commit = commit;
232 ar_args->time = archive_time;
235 static int parse_archive_args(int argc, const char **argv,
236 const struct archiver **ar, struct archiver_args *args)
238 const char *format = "tar";
239 const char *base = "";
240 int compression_level = -1;
244 for (i = 1; i < argc; i++) {
245 const char *arg = argv[i];
247 if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
248 for (i = 0; i < ARRAY_SIZE(archivers); i++)
249 printf("%s\n", archivers[i].name);
252 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
256 if (!prefixcmp(arg, "--format=")) {
260 if (!prefixcmp(arg, "--prefix=")) {
264 if (!strcmp(arg, "--")) {
268 if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0') {
269 compression_level = arg[1] - '0';
273 die("Unknown argument: %s", arg);
277 /* We need at least one parameter -- tree-ish */
279 usage(archive_usage);
280 *ar = lookup_archiver(format);
282 die("Unknown archive format '%s'", format);
284 args->compression_level = Z_DEFAULT_COMPRESSION;
285 if (compression_level != -1) {
286 if ((*ar)->flags & USES_ZLIB_COMPRESSION)
287 args->compression_level = compression_level;
289 die("Argument not supported for format '%s': -%d",
290 format, compression_level);
293 args->verbose = verbose;
295 args->baselen = strlen(base);
300 int write_archive(int argc, const char **argv, const char *prefix,
303 const struct archiver *ar = NULL;
304 struct archiver_args args;
307 tree_idx = parse_archive_args(argc, argv, &ar, &args);
308 if (setup_prefix && prefix == NULL)
309 prefix = setup_git_directory();
312 parse_treeish_arg(argv, &args, prefix);
313 parse_pathspec_arg(argv + 1, &args);
315 return ar->write_archive(&args);