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