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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; |
dd2e794a TR |
34 | struct pretty_print_context ctx = {0}; |
35 | ctx.date_mode = DATE_NORMAL; | |
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 | ||
1d11d5bb RS |
62 | static void *sha1_file_to_archive(const char *path, const unsigned char *sha1, |
63 | unsigned int mode, enum object_type *type, | |
64 | unsigned long *sizep, const struct commit *commit) | |
18125644 LH |
65 | { |
66 | void *buffer; | |
67 | ||
68 | buffer = read_sha1_file(sha1, type, sizep); | |
69 | if (buffer && S_ISREG(mode)) { | |
f285a2d7 | 70 | struct strbuf buf = STRBUF_INIT; |
18125644 LH |
71 | size_t size = 0; |
72 | ||
18125644 LH |
73 | strbuf_attach(&buf, buffer, *sizep, *sizep + 1); |
74 | convert_to_working_tree(path, buf.buf, buf.len, &buf); | |
1d11d5bb RS |
75 | if (commit) |
76 | format_subst(commit, buf.buf, buf.len, &buf); | |
18125644 LH |
77 | buffer = strbuf_detach(&buf, &size); |
78 | *sizep = size; | |
79 | } | |
80 | ||
81 | return buffer; | |
82 | } | |
83 | ||
1d11d5bb | 84 | static void setup_archive_check(struct git_attr_check *check) |
008d896d RS |
85 | { |
86 | static struct git_attr *attr_export_ignore; | |
1d11d5bb | 87 | static struct git_attr *attr_export_subst; |
008d896d | 88 | |
1d11d5bb | 89 | if (!attr_export_ignore) { |
008d896d | 90 | attr_export_ignore = git_attr("export-ignore", 13); |
1d11d5bb RS |
91 | attr_export_subst = git_attr("export-subst", 12); |
92 | } | |
008d896d | 93 | check[0].attr = attr_export_ignore; |
1d11d5bb | 94 | check[1].attr = attr_export_subst; |
008d896d | 95 | } |
562e25ab RS |
96 | |
97 | struct archiver_context { | |
98 | struct archiver_args *args; | |
99 | write_archive_entry_fn_t write_entry; | |
100 | }; | |
101 | ||
102 | static int write_archive_entry(const unsigned char *sha1, const char *base, | |
103 | int baselen, const char *filename, unsigned mode, int stage, | |
104 | void *context) | |
105 | { | |
106 | static struct strbuf path = STRBUF_INIT; | |
107 | struct archiver_context *c = context; | |
108 | struct archiver_args *args = c->args; | |
109 | write_archive_entry_fn_t write_entry = c->write_entry; | |
1d11d5bb RS |
110 | struct git_attr_check check[2]; |
111 | const char *path_without_prefix; | |
112 | int convert = 0; | |
562e25ab RS |
113 | int err; |
114 | enum object_type type; | |
115 | unsigned long size; | |
116 | void *buffer; | |
117 | ||
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 RS |
125 | setup_archive_check(check); |
126 | if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) { | |
127 | if (ATTR_TRUE(check[0].value)) | |
128 | return 0; | |
129 | convert = ATTR_TRUE(check[1].value); | |
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); | |
136 | err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0); | |
137 | if (err) | |
138 | return err; | |
d3bee161 | 139 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
562e25ab RS |
140 | } |
141 | ||
1d11d5bb RS |
142 | buffer = sha1_file_to_archive(path_without_prefix, sha1, mode, |
143 | &type, &size, convert ? args->commit : NULL); | |
562e25ab RS |
144 | if (!buffer) |
145 | return error("cannot read %s", sha1_to_hex(sha1)); | |
146 | if (args->verbose) | |
147 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
148 | err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size); | |
149 | free(buffer); | |
150 | return err; | |
151 | } | |
152 | ||
153 | int write_archive_entries(struct archiver_args *args, | |
154 | write_archive_entry_fn_t write_entry) | |
155 | { | |
156 | struct archiver_context context; | |
ba053ea9 NTND |
157 | struct unpack_trees_options opts; |
158 | struct tree_desc t; | |
562e25ab RS |
159 | int err; |
160 | ||
161 | if (args->baselen > 0 && args->base[args->baselen - 1] == '/') { | |
162 | size_t len = args->baselen; | |
163 | ||
164 | while (len > 1 && args->base[len - 2] == '/') | |
165 | len--; | |
166 | if (args->verbose) | |
167 | fprintf(stderr, "%.*s\n", (int)len, args->base); | |
168 | err = write_entry(args, args->tree->object.sha1, args->base, | |
169 | len, 040777, NULL, 0); | |
170 | if (err) | |
171 | return err; | |
172 | } | |
173 | ||
174 | context.args = args; | |
175 | context.write_entry = write_entry; | |
176 | ||
ba053ea9 NTND |
177 | /* |
178 | * Setup index and instruct attr to read index only | |
179 | */ | |
180 | if (!args->worktree_attributes) { | |
181 | memset(&opts, 0, sizeof(opts)); | |
182 | opts.index_only = 1; | |
183 | opts.head_idx = -1; | |
184 | opts.src_index = &the_index; | |
185 | opts.dst_index = &the_index; | |
186 | opts.fn = oneway_merge; | |
187 | init_tree_desc(&t, args->tree->buffer, args->tree->size); | |
188 | if (unpack_trees(1, &t, &opts)) | |
189 | return -1; | |
190 | git_attr_set_direction(GIT_ATTR_INDEX, &the_index); | |
191 | } | |
192 | ||
ebfbdb34 RS |
193 | err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec, |
194 | write_archive_entry, &context); | |
562e25ab RS |
195 | if (err == READ_TREE_RECURSIVE) |
196 | err = 0; | |
197 | return err; | |
198 | } | |
6e94e683 | 199 | |
c0885435 RS |
200 | static const struct archiver *lookup_archiver(const char *name) |
201 | { | |
202 | int i; | |
203 | ||
4fac1d3a RS |
204 | if (!name) |
205 | return NULL; | |
206 | ||
c0885435 RS |
207 | for (i = 0; i < ARRAY_SIZE(archivers); i++) { |
208 | if (!strcmp(name, archivers[i].name)) | |
209 | return &archivers[i]; | |
210 | } | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | static void parse_pathspec_arg(const char **pathspec, | |
215 | struct archiver_args *ar_args) | |
216 | { | |
ebfbdb34 | 217 | ar_args->pathspec = get_pathspec("", pathspec); |
c0885435 RS |
218 | } |
219 | ||
220 | static void parse_treeish_arg(const char **argv, | |
221 | struct archiver_args *ar_args, const char *prefix) | |
222 | { | |
223 | const char *name = argv[0]; | |
224 | const unsigned char *commit_sha1; | |
225 | time_t archive_time; | |
226 | struct tree *tree; | |
227 | const struct commit *commit; | |
228 | unsigned char sha1[20]; | |
229 | ||
230 | if (get_sha1(name, sha1)) | |
231 | die("Not a valid object name"); | |
232 | ||
233 | commit = lookup_commit_reference_gently(sha1, 1); | |
234 | if (commit) { | |
235 | commit_sha1 = commit->object.sha1; | |
236 | archive_time = commit->date; | |
237 | } else { | |
238 | commit_sha1 = NULL; | |
239 | archive_time = time(NULL); | |
240 | } | |
241 | ||
242 | tree = parse_tree_indirect(sha1); | |
243 | if (tree == NULL) | |
244 | die("not a tree object"); | |
245 | ||
246 | if (prefix) { | |
247 | unsigned char tree_sha1[20]; | |
248 | unsigned int mode; | |
249 | int err; | |
250 | ||
251 | err = get_tree_entry(tree->object.sha1, prefix, | |
252 | tree_sha1, &mode); | |
253 | if (err || !S_ISDIR(mode)) | |
254 | die("current working directory is untracked"); | |
255 | ||
256 | tree = parse_tree_indirect(tree_sha1); | |
257 | } | |
258 | ar_args->tree = tree; | |
259 | ar_args->commit_sha1 = commit_sha1; | |
260 | ar_args->commit = commit; | |
261 | ar_args->time = archive_time; | |
262 | } | |
263 | ||
4fac1d3a RS |
264 | #define OPT__COMPR(s, v, h, p) \ |
265 | { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \ | |
266 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) } | |
267 | #define OPT__COMPR_HIDDEN(s, v, p) \ | |
268 | { OPTION_SET_INT, (s), NULL, (v), NULL, "", \ | |
269 | PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) } | |
270 | ||
c0885435 RS |
271 | static int parse_archive_args(int argc, const char **argv, |
272 | const struct archiver **ar, struct archiver_args *args) | |
273 | { | |
274 | const char *format = "tar"; | |
4fac1d3a RS |
275 | const char *base = NULL; |
276 | const char *remote = NULL; | |
277 | const char *exec = NULL; | |
aec0c1bb | 278 | const char *output = NULL; |
c0885435 RS |
279 | int compression_level = -1; |
280 | int verbose = 0; | |
281 | int i; | |
4fac1d3a | 282 | int list = 0; |
ba053ea9 | 283 | int worktree_attributes = 0; |
4fac1d3a RS |
284 | struct option opts[] = { |
285 | OPT_GROUP(""), | |
286 | OPT_STRING(0, "format", &format, "fmt", "archive format"), | |
287 | OPT_STRING(0, "prefix", &base, "prefix", | |
288 | "prepend prefix to each pathname in the archive"), | |
05d3951e | 289 | OPT_STRING('o', "output", &output, "file", |
aec0c1bb | 290 | "write the archive to this file"), |
ba053ea9 NTND |
291 | OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes, |
292 | "read .gitattributes in working directory"), | |
4fac1d3a RS |
293 | OPT__VERBOSE(&verbose), |
294 | OPT__COMPR('0', &compression_level, "store only", 0), | |
295 | OPT__COMPR('1', &compression_level, "compress faster", 1), | |
296 | OPT__COMPR_HIDDEN('2', &compression_level, 2), | |
297 | OPT__COMPR_HIDDEN('3', &compression_level, 3), | |
298 | OPT__COMPR_HIDDEN('4', &compression_level, 4), | |
299 | OPT__COMPR_HIDDEN('5', &compression_level, 5), | |
300 | OPT__COMPR_HIDDEN('6', &compression_level, 6), | |
301 | OPT__COMPR_HIDDEN('7', &compression_level, 7), | |
302 | OPT__COMPR_HIDDEN('8', &compression_level, 8), | |
303 | OPT__COMPR('9', &compression_level, "compress better", 9), | |
304 | OPT_GROUP(""), | |
305 | OPT_BOOLEAN('l', "list", &list, | |
306 | "list supported archive formats"), | |
307 | OPT_GROUP(""), | |
308 | OPT_STRING(0, "remote", &remote, "repo", | |
309 | "retrieve the archive from remote repository <repo>"), | |
310 | OPT_STRING(0, "exec", &exec, "cmd", | |
311 | "path to the remote git-upload-archive command"), | |
312 | OPT_END() | |
313 | }; | |
314 | ||
37782920 | 315 | argc = parse_options(argc, argv, NULL, opts, archive_usage, 0); |
4fac1d3a RS |
316 | |
317 | if (remote) | |
318 | die("Unexpected option --remote"); | |
319 | if (exec) | |
320 | die("Option --exec can only be used together with --remote"); | |
52e77876 RS |
321 | if (output) |
322 | die("Unexpected option --output"); | |
4fac1d3a RS |
323 | |
324 | if (!base) | |
325 | base = ""; | |
326 | ||
327 | if (list) { | |
328 | for (i = 0; i < ARRAY_SIZE(archivers); i++) | |
329 | printf("%s\n", archivers[i].name); | |
330 | exit(0); | |
c0885435 RS |
331 | } |
332 | ||
333 | /* We need at least one parameter -- tree-ish */ | |
4fac1d3a RS |
334 | if (argc < 1) |
335 | usage_with_options(archive_usage, opts); | |
c0885435 RS |
336 | *ar = lookup_archiver(format); |
337 | if (!*ar) | |
338 | die("Unknown archive format '%s'", format); | |
339 | ||
340 | args->compression_level = Z_DEFAULT_COMPRESSION; | |
341 | if (compression_level != -1) { | |
342 | if ((*ar)->flags & USES_ZLIB_COMPRESSION) | |
343 | args->compression_level = compression_level; | |
344 | else { | |
345 | die("Argument not supported for format '%s': -%d", | |
346 | format, compression_level); | |
347 | } | |
348 | } | |
349 | args->verbose = verbose; | |
350 | args->base = base; | |
351 | args->baselen = strlen(base); | |
ba053ea9 | 352 | args->worktree_attributes = worktree_attributes; |
c0885435 | 353 | |
4fac1d3a | 354 | return argc; |
c0885435 RS |
355 | } |
356 | ||
6e94e683 RS |
357 | int write_archive(int argc, const char **argv, const char *prefix, |
358 | int setup_prefix) | |
359 | { | |
360 | const struct archiver *ar = NULL; | |
361 | struct archiver_args args; | |
6e94e683 | 362 | |
4fac1d3a | 363 | argc = parse_archive_args(argc, argv, &ar, &args); |
6e94e683 RS |
364 | if (setup_prefix && prefix == NULL) |
365 | prefix = setup_git_directory(); | |
366 | ||
6e94e683 RS |
367 | parse_treeish_arg(argv, &args, prefix); |
368 | parse_pathspec_arg(argv + 1, &args); | |
369 | ||
ddff8563 CB |
370 | git_config(git_default_config, NULL); |
371 | ||
6e94e683 RS |
372 | return ar->write_archive(&args); |
373 | } |