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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[] = { | |
10 | "git archive [options] <tree-ish> [path...]", | |
11 | "git archive --list", | |
12 | "git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]", | |
13 | "git archive --remote <repo> [--exec <cmd>] --list", | |
14 | NULL | |
15 | }; | |
c0885435 RS |
16 | |
17 | #define USES_ZLIB_COMPRESSION 1 | |
18 | ||
120a385a | 19 | static const struct archiver { |
f15f736d RS |
20 | const char *name; |
21 | write_archive_fn_t write_archive; | |
22 | unsigned int flags; | |
23 | } archivers[] = { | |
c0885435 RS |
24 | { "tar", write_tar_archive }, |
25 | { "zip", write_zip_archive, USES_ZLIB_COMPRESSION }, | |
26 | }; | |
27 | ||
18125644 LH |
28 | static void format_subst(const struct commit *commit, |
29 | const char *src, size_t len, | |
30 | struct strbuf *buf) | |
31 | { | |
32 | char *to_free = NULL; | |
f285a2d7 | 33 | struct strbuf fmt = STRBUF_INIT; |
18125644 LH |
34 | |
35 | if (src == buf->buf) | |
36 | to_free = strbuf_detach(buf, NULL); | |
18125644 LH |
37 | for (;;) { |
38 | const char *b, *c; | |
39 | ||
40 | b = memmem(src, len, "$Format:", 8); | |
75b7dfbd | 41 | if (!b) |
18125644 | 42 | break; |
75b7dfbd | 43 | c = memchr(b + 8, '$', (src + len) - b - 8); |
18125644 LH |
44 | if (!c) |
45 | break; | |
46 | ||
47 | strbuf_reset(&fmt); | |
48 | strbuf_add(&fmt, b + 8, c - b - 8); | |
49 | ||
50 | strbuf_add(buf, src, b - src); | |
d36f8679 | 51 | format_commit_message(commit, fmt.buf, buf, DATE_NORMAL); |
18125644 LH |
52 | len -= c + 1 - src; |
53 | src = c + 1; | |
54 | } | |
55 | strbuf_add(buf, src, len); | |
56 | strbuf_release(&fmt); | |
57 | free(to_free); | |
58 | } | |
59 | ||
1d11d5bb RS |
60 | static void *sha1_file_to_archive(const char *path, const unsigned char *sha1, |
61 | unsigned int mode, enum object_type *type, | |
62 | unsigned long *sizep, const struct commit *commit) | |
18125644 LH |
63 | { |
64 | void *buffer; | |
65 | ||
66 | buffer = read_sha1_file(sha1, type, sizep); | |
67 | if (buffer && S_ISREG(mode)) { | |
f285a2d7 | 68 | struct strbuf buf = STRBUF_INIT; |
18125644 LH |
69 | size_t size = 0; |
70 | ||
18125644 LH |
71 | strbuf_attach(&buf, buffer, *sizep, *sizep + 1); |
72 | convert_to_working_tree(path, buf.buf, buf.len, &buf); | |
1d11d5bb RS |
73 | if (commit) |
74 | format_subst(commit, buf.buf, buf.len, &buf); | |
18125644 LH |
75 | buffer = strbuf_detach(&buf, &size); |
76 | *sizep = size; | |
77 | } | |
78 | ||
79 | return buffer; | |
80 | } | |
81 | ||
1d11d5bb | 82 | static void setup_archive_check(struct git_attr_check *check) |
008d896d RS |
83 | { |
84 | static struct git_attr *attr_export_ignore; | |
1d11d5bb | 85 | static struct git_attr *attr_export_subst; |
008d896d | 86 | |
1d11d5bb | 87 | if (!attr_export_ignore) { |
008d896d | 88 | attr_export_ignore = git_attr("export-ignore", 13); |
1d11d5bb RS |
89 | attr_export_subst = git_attr("export-subst", 12); |
90 | } | |
008d896d | 91 | check[0].attr = attr_export_ignore; |
1d11d5bb | 92 | check[1].attr = attr_export_subst; |
008d896d | 93 | } |
562e25ab RS |
94 | |
95 | struct archiver_context { | |
96 | struct archiver_args *args; | |
97 | write_archive_entry_fn_t write_entry; | |
98 | }; | |
99 | ||
100 | static int write_archive_entry(const unsigned char *sha1, const char *base, | |
101 | int baselen, const char *filename, unsigned mode, int stage, | |
102 | void *context) | |
103 | { | |
104 | static struct strbuf path = STRBUF_INIT; | |
105 | struct archiver_context *c = context; | |
106 | struct archiver_args *args = c->args; | |
107 | write_archive_entry_fn_t write_entry = c->write_entry; | |
1d11d5bb RS |
108 | struct git_attr_check check[2]; |
109 | const char *path_without_prefix; | |
110 | int convert = 0; | |
562e25ab RS |
111 | int err; |
112 | enum object_type type; | |
113 | unsigned long size; | |
114 | void *buffer; | |
115 | ||
116 | strbuf_reset(&path); | |
117 | strbuf_grow(&path, PATH_MAX); | |
ebfbdb34 | 118 | strbuf_add(&path, args->base, args->baselen); |
562e25ab RS |
119 | strbuf_add(&path, base, baselen); |
120 | strbuf_addstr(&path, filename); | |
1d11d5bb | 121 | path_without_prefix = path.buf + args->baselen; |
562e25ab | 122 | |
1d11d5bb RS |
123 | setup_archive_check(check); |
124 | if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) { | |
125 | if (ATTR_TRUE(check[0].value)) | |
126 | return 0; | |
127 | convert = ATTR_TRUE(check[1].value); | |
128 | } | |
562e25ab RS |
129 | |
130 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
131 | strbuf_addch(&path, '/'); | |
132 | if (args->verbose) | |
133 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
134 | err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0); | |
135 | if (err) | |
136 | return err; | |
d3bee161 | 137 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
562e25ab RS |
138 | } |
139 | ||
1d11d5bb RS |
140 | buffer = sha1_file_to_archive(path_without_prefix, sha1, mode, |
141 | &type, &size, convert ? args->commit : NULL); | |
562e25ab RS |
142 | if (!buffer) |
143 | return error("cannot read %s", sha1_to_hex(sha1)); | |
144 | if (args->verbose) | |
145 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
146 | err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size); | |
147 | free(buffer); | |
148 | return err; | |
149 | } | |
150 | ||
151 | int write_archive_entries(struct archiver_args *args, | |
152 | write_archive_entry_fn_t write_entry) | |
153 | { | |
154 | struct archiver_context context; | |
ba053ea9 NTND |
155 | struct unpack_trees_options opts; |
156 | struct tree_desc t; | |
562e25ab RS |
157 | int err; |
158 | ||
159 | if (args->baselen > 0 && args->base[args->baselen - 1] == '/') { | |
160 | size_t len = args->baselen; | |
161 | ||
162 | while (len > 1 && args->base[len - 2] == '/') | |
163 | len--; | |
164 | if (args->verbose) | |
165 | fprintf(stderr, "%.*s\n", (int)len, args->base); | |
166 | err = write_entry(args, args->tree->object.sha1, args->base, | |
167 | len, 040777, NULL, 0); | |
168 | if (err) | |
169 | return err; | |
170 | } | |
171 | ||
172 | context.args = args; | |
173 | context.write_entry = write_entry; | |
174 | ||
ba053ea9 NTND |
175 | /* |
176 | * Setup index and instruct attr to read index only | |
177 | */ | |
178 | if (!args->worktree_attributes) { | |
179 | memset(&opts, 0, sizeof(opts)); | |
180 | opts.index_only = 1; | |
181 | opts.head_idx = -1; | |
182 | opts.src_index = &the_index; | |
183 | opts.dst_index = &the_index; | |
184 | opts.fn = oneway_merge; | |
185 | init_tree_desc(&t, args->tree->buffer, args->tree->size); | |
186 | if (unpack_trees(1, &t, &opts)) | |
187 | return -1; | |
188 | git_attr_set_direction(GIT_ATTR_INDEX, &the_index); | |
189 | } | |
190 | ||
ebfbdb34 RS |
191 | err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec, |
192 | write_archive_entry, &context); | |
562e25ab RS |
193 | if (err == READ_TREE_RECURSIVE) |
194 | err = 0; | |
195 | return err; | |
196 | } | |
6e94e683 | 197 | |
c0885435 RS |
198 | static const struct archiver *lookup_archiver(const char *name) |
199 | { | |
200 | int i; | |
201 | ||
4fac1d3a RS |
202 | if (!name) |
203 | return NULL; | |
204 | ||
c0885435 RS |
205 | for (i = 0; i < ARRAY_SIZE(archivers); i++) { |
206 | if (!strcmp(name, archivers[i].name)) | |
207 | return &archivers[i]; | |
208 | } | |
209 | return NULL; | |
210 | } | |
211 | ||
212 | static void parse_pathspec_arg(const char **pathspec, | |
213 | struct archiver_args *ar_args) | |
214 | { | |
ebfbdb34 | 215 | ar_args->pathspec = get_pathspec("", pathspec); |
c0885435 RS |
216 | } |
217 | ||
218 | static void parse_treeish_arg(const char **argv, | |
219 | struct archiver_args *ar_args, const char *prefix) | |
220 | { | |
221 | const char *name = argv[0]; | |
222 | const unsigned char *commit_sha1; | |
223 | time_t archive_time; | |
224 | struct tree *tree; | |
225 | const struct commit *commit; | |
226 | unsigned char sha1[20]; | |
227 | ||
228 | if (get_sha1(name, sha1)) | |
229 | die("Not a valid object name"); | |
230 | ||
231 | commit = lookup_commit_reference_gently(sha1, 1); | |
232 | if (commit) { | |
233 | commit_sha1 = commit->object.sha1; | |
234 | archive_time = commit->date; | |
235 | } else { | |
236 | commit_sha1 = NULL; | |
237 | archive_time = time(NULL); | |
238 | } | |
239 | ||
240 | tree = parse_tree_indirect(sha1); | |
241 | if (tree == NULL) | |
242 | die("not a tree object"); | |
243 | ||
244 | if (prefix) { | |
245 | unsigned char tree_sha1[20]; | |
246 | unsigned int mode; | |
247 | int err; | |
248 | ||
249 | err = get_tree_entry(tree->object.sha1, prefix, | |
250 | tree_sha1, &mode); | |
251 | if (err || !S_ISDIR(mode)) | |
252 | die("current working directory is untracked"); | |
253 | ||
254 | tree = parse_tree_indirect(tree_sha1); | |
255 | } | |
256 | ar_args->tree = tree; | |
257 | ar_args->commit_sha1 = commit_sha1; | |
258 | ar_args->commit = commit; | |
259 | ar_args->time = archive_time; | |
260 | } | |
261 | ||
4fac1d3a RS |
262 | #define OPT__COMPR(s, v, h, p) \ |
263 | { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \ | |
264 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) } | |
265 | #define OPT__COMPR_HIDDEN(s, v, p) \ | |
266 | { OPTION_SET_INT, (s), NULL, (v), NULL, "", \ | |
267 | PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) } | |
268 | ||
c0885435 RS |
269 | static int parse_archive_args(int argc, const char **argv, |
270 | const struct archiver **ar, struct archiver_args *args) | |
271 | { | |
272 | const char *format = "tar"; | |
4fac1d3a RS |
273 | const char *base = NULL; |
274 | const char *remote = NULL; | |
275 | const char *exec = NULL; | |
aec0c1bb | 276 | const char *output = NULL; |
c0885435 RS |
277 | int compression_level = -1; |
278 | int verbose = 0; | |
279 | int i; | |
4fac1d3a | 280 | int list = 0; |
ba053ea9 | 281 | int worktree_attributes = 0; |
4fac1d3a RS |
282 | struct option opts[] = { |
283 | OPT_GROUP(""), | |
284 | OPT_STRING(0, "format", &format, "fmt", "archive format"), | |
285 | OPT_STRING(0, "prefix", &base, "prefix", | |
286 | "prepend prefix to each pathname in the archive"), | |
05d3951e | 287 | OPT_STRING('o', "output", &output, "file", |
aec0c1bb | 288 | "write the archive to this file"), |
ba053ea9 NTND |
289 | OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes, |
290 | "read .gitattributes in working directory"), | |
4fac1d3a RS |
291 | OPT__VERBOSE(&verbose), |
292 | OPT__COMPR('0', &compression_level, "store only", 0), | |
293 | OPT__COMPR('1', &compression_level, "compress faster", 1), | |
294 | OPT__COMPR_HIDDEN('2', &compression_level, 2), | |
295 | OPT__COMPR_HIDDEN('3', &compression_level, 3), | |
296 | OPT__COMPR_HIDDEN('4', &compression_level, 4), | |
297 | OPT__COMPR_HIDDEN('5', &compression_level, 5), | |
298 | OPT__COMPR_HIDDEN('6', &compression_level, 6), | |
299 | OPT__COMPR_HIDDEN('7', &compression_level, 7), | |
300 | OPT__COMPR_HIDDEN('8', &compression_level, 8), | |
301 | OPT__COMPR('9', &compression_level, "compress better", 9), | |
302 | OPT_GROUP(""), | |
303 | OPT_BOOLEAN('l', "list", &list, | |
304 | "list supported archive formats"), | |
305 | OPT_GROUP(""), | |
306 | OPT_STRING(0, "remote", &remote, "repo", | |
307 | "retrieve the archive from remote repository <repo>"), | |
308 | OPT_STRING(0, "exec", &exec, "cmd", | |
309 | "path to the remote git-upload-archive command"), | |
310 | OPT_END() | |
311 | }; | |
312 | ||
37782920 | 313 | argc = parse_options(argc, argv, NULL, opts, archive_usage, 0); |
4fac1d3a RS |
314 | |
315 | if (remote) | |
316 | die("Unexpected option --remote"); | |
317 | if (exec) | |
318 | die("Option --exec can only be used together with --remote"); | |
52e77876 RS |
319 | if (output) |
320 | die("Unexpected option --output"); | |
4fac1d3a RS |
321 | |
322 | if (!base) | |
323 | base = ""; | |
324 | ||
325 | if (list) { | |
326 | for (i = 0; i < ARRAY_SIZE(archivers); i++) | |
327 | printf("%s\n", archivers[i].name); | |
328 | exit(0); | |
c0885435 RS |
329 | } |
330 | ||
331 | /* We need at least one parameter -- tree-ish */ | |
4fac1d3a RS |
332 | if (argc < 1) |
333 | usage_with_options(archive_usage, opts); | |
c0885435 RS |
334 | *ar = lookup_archiver(format); |
335 | if (!*ar) | |
336 | die("Unknown archive format '%s'", format); | |
337 | ||
338 | args->compression_level = Z_DEFAULT_COMPRESSION; | |
339 | if (compression_level != -1) { | |
340 | if ((*ar)->flags & USES_ZLIB_COMPRESSION) | |
341 | args->compression_level = compression_level; | |
342 | else { | |
343 | die("Argument not supported for format '%s': -%d", | |
344 | format, compression_level); | |
345 | } | |
346 | } | |
347 | args->verbose = verbose; | |
348 | args->base = base; | |
349 | args->baselen = strlen(base); | |
ba053ea9 | 350 | args->worktree_attributes = worktree_attributes; |
c0885435 | 351 | |
4fac1d3a | 352 | return argc; |
c0885435 RS |
353 | } |
354 | ||
6e94e683 RS |
355 | int write_archive(int argc, const char **argv, const char *prefix, |
356 | int setup_prefix) | |
357 | { | |
358 | const struct archiver *ar = NULL; | |
359 | struct archiver_args args; | |
6e94e683 | 360 | |
4fac1d3a | 361 | argc = parse_archive_args(argc, argv, &ar, &args); |
6e94e683 RS |
362 | if (setup_prefix && prefix == NULL) |
363 | prefix = setup_git_directory(); | |
364 | ||
6e94e683 RS |
365 | parse_treeish_arg(argv, &args, prefix); |
366 | parse_pathspec_arg(argv + 1, &args); | |
367 | ||
ddff8563 CB |
368 | git_config(git_default_config, NULL); |
369 | ||
6e94e683 RS |
370 | return ar->write_archive(&args); |
371 | } |