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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" |
18125644 | 6 | |
c0885435 RS |
7 | static const char archive_usage[] = \ |
8 | "git archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]"; | |
9 | ||
10 | #define USES_ZLIB_COMPRESSION 1 | |
11 | ||
f15f736d RS |
12 | const struct archiver { |
13 | const char *name; | |
14 | write_archive_fn_t write_archive; | |
15 | unsigned int flags; | |
16 | } archivers[] = { | |
c0885435 RS |
17 | { "tar", write_tar_archive }, |
18 | { "zip", write_zip_archive, USES_ZLIB_COMPRESSION }, | |
19 | }; | |
20 | ||
18125644 LH |
21 | static void format_subst(const struct commit *commit, |
22 | const char *src, size_t len, | |
23 | struct strbuf *buf) | |
24 | { | |
25 | char *to_free = NULL; | |
26 | struct strbuf fmt; | |
27 | ||
28 | if (src == buf->buf) | |
29 | to_free = strbuf_detach(buf, NULL); | |
30 | strbuf_init(&fmt, 0); | |
31 | for (;;) { | |
32 | const char *b, *c; | |
33 | ||
34 | b = memmem(src, len, "$Format:", 8); | |
75b7dfbd | 35 | if (!b) |
18125644 | 36 | break; |
75b7dfbd | 37 | c = memchr(b + 8, '$', (src + len) - b - 8); |
18125644 LH |
38 | if (!c) |
39 | break; | |
40 | ||
41 | strbuf_reset(&fmt); | |
42 | strbuf_add(&fmt, b + 8, c - b - 8); | |
43 | ||
44 | strbuf_add(buf, src, b - src); | |
45 | format_commit_message(commit, fmt.buf, buf); | |
46 | len -= c + 1 - src; | |
47 | src = c + 1; | |
48 | } | |
49 | strbuf_add(buf, src, len); | |
50 | strbuf_release(&fmt); | |
51 | free(to_free); | |
52 | } | |
53 | ||
1d11d5bb RS |
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) | |
18125644 LH |
57 | { |
58 | void *buffer; | |
59 | ||
60 | buffer = read_sha1_file(sha1, type, sizep); | |
61 | if (buffer && S_ISREG(mode)) { | |
62 | struct strbuf buf; | |
63 | size_t size = 0; | |
64 | ||
65 | strbuf_init(&buf, 0); | |
66 | strbuf_attach(&buf, buffer, *sizep, *sizep + 1); | |
67 | convert_to_working_tree(path, buf.buf, buf.len, &buf); | |
1d11d5bb RS |
68 | if (commit) |
69 | format_subst(commit, buf.buf, buf.len, &buf); | |
18125644 LH |
70 | buffer = strbuf_detach(&buf, &size); |
71 | *sizep = size; | |
72 | } | |
73 | ||
74 | return buffer; | |
75 | } | |
76 | ||
1d11d5bb | 77 | static void setup_archive_check(struct git_attr_check *check) |
008d896d RS |
78 | { |
79 | static struct git_attr *attr_export_ignore; | |
1d11d5bb | 80 | static struct git_attr *attr_export_subst; |
008d896d | 81 | |
1d11d5bb | 82 | if (!attr_export_ignore) { |
008d896d | 83 | attr_export_ignore = git_attr("export-ignore", 13); |
1d11d5bb RS |
84 | attr_export_subst = git_attr("export-subst", 12); |
85 | } | |
008d896d | 86 | check[0].attr = attr_export_ignore; |
1d11d5bb | 87 | check[1].attr = attr_export_subst; |
008d896d | 88 | } |
562e25ab RS |
89 | |
90 | struct archiver_context { | |
91 | struct archiver_args *args; | |
92 | write_archive_entry_fn_t write_entry; | |
93 | }; | |
94 | ||
95 | static int write_archive_entry(const unsigned char *sha1, const char *base, | |
96 | int baselen, const char *filename, unsigned mode, int stage, | |
97 | void *context) | |
98 | { | |
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; | |
1d11d5bb RS |
103 | struct git_attr_check check[2]; |
104 | const char *path_without_prefix; | |
105 | int convert = 0; | |
562e25ab RS |
106 | int err; |
107 | enum object_type type; | |
108 | unsigned long size; | |
109 | void *buffer; | |
110 | ||
111 | strbuf_reset(&path); | |
112 | strbuf_grow(&path, PATH_MAX); | |
113 | strbuf_add(&path, base, baselen); | |
114 | strbuf_addstr(&path, filename); | |
1d11d5bb | 115 | path_without_prefix = path.buf + args->baselen; |
562e25ab | 116 | |
1d11d5bb RS |
117 | setup_archive_check(check); |
118 | if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) { | |
119 | if (ATTR_TRUE(check[0].value)) | |
120 | return 0; | |
121 | convert = ATTR_TRUE(check[1].value); | |
122 | } | |
562e25ab RS |
123 | |
124 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
125 | strbuf_addch(&path, '/'); | |
126 | if (args->verbose) | |
127 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
128 | err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0); | |
129 | if (err) | |
130 | return err; | |
131 | return READ_TREE_RECURSIVE; | |
132 | } | |
133 | ||
1d11d5bb RS |
134 | buffer = sha1_file_to_archive(path_without_prefix, sha1, mode, |
135 | &type, &size, convert ? args->commit : NULL); | |
562e25ab RS |
136 | if (!buffer) |
137 | return error("cannot read %s", sha1_to_hex(sha1)); | |
138 | if (args->verbose) | |
139 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
140 | err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size); | |
141 | free(buffer); | |
142 | return err; | |
143 | } | |
144 | ||
145 | int write_archive_entries(struct archiver_args *args, | |
146 | write_archive_entry_fn_t write_entry) | |
147 | { | |
148 | struct archiver_context context; | |
149 | int err; | |
150 | ||
151 | if (args->baselen > 0 && args->base[args->baselen - 1] == '/') { | |
152 | size_t len = args->baselen; | |
153 | ||
154 | while (len > 1 && args->base[len - 2] == '/') | |
155 | len--; | |
156 | if (args->verbose) | |
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); | |
160 | if (err) | |
161 | return err; | |
162 | } | |
163 | ||
164 | context.args = args; | |
165 | context.write_entry = write_entry; | |
166 | ||
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) | |
170 | err = 0; | |
171 | return err; | |
172 | } | |
6e94e683 | 173 | |
c0885435 RS |
174 | static const struct archiver *lookup_archiver(const char *name) |
175 | { | |
176 | int i; | |
177 | ||
178 | for (i = 0; i < ARRAY_SIZE(archivers); i++) { | |
179 | if (!strcmp(name, archivers[i].name)) | |
180 | return &archivers[i]; | |
181 | } | |
182 | return NULL; | |
183 | } | |
184 | ||
185 | static void parse_pathspec_arg(const char **pathspec, | |
186 | struct archiver_args *ar_args) | |
187 | { | |
188 | ar_args->pathspec = get_pathspec(ar_args->base, pathspec); | |
189 | } | |
190 | ||
191 | static void parse_treeish_arg(const char **argv, | |
192 | struct archiver_args *ar_args, const char *prefix) | |
193 | { | |
194 | const char *name = argv[0]; | |
195 | const unsigned char *commit_sha1; | |
196 | time_t archive_time; | |
197 | struct tree *tree; | |
198 | const struct commit *commit; | |
199 | unsigned char sha1[20]; | |
200 | ||
201 | if (get_sha1(name, sha1)) | |
202 | die("Not a valid object name"); | |
203 | ||
204 | commit = lookup_commit_reference_gently(sha1, 1); | |
205 | if (commit) { | |
206 | commit_sha1 = commit->object.sha1; | |
207 | archive_time = commit->date; | |
208 | } else { | |
209 | commit_sha1 = NULL; | |
210 | archive_time = time(NULL); | |
211 | } | |
212 | ||
213 | tree = parse_tree_indirect(sha1); | |
214 | if (tree == NULL) | |
215 | die("not a tree object"); | |
216 | ||
217 | if (prefix) { | |
218 | unsigned char tree_sha1[20]; | |
219 | unsigned int mode; | |
220 | int err; | |
221 | ||
222 | err = get_tree_entry(tree->object.sha1, prefix, | |
223 | tree_sha1, &mode); | |
224 | if (err || !S_ISDIR(mode)) | |
225 | die("current working directory is untracked"); | |
226 | ||
227 | tree = parse_tree_indirect(tree_sha1); | |
228 | } | |
229 | ar_args->tree = tree; | |
230 | ar_args->commit_sha1 = commit_sha1; | |
231 | ar_args->commit = commit; | |
232 | ar_args->time = archive_time; | |
233 | } | |
234 | ||
235 | static int parse_archive_args(int argc, const char **argv, | |
236 | const struct archiver **ar, struct archiver_args *args) | |
237 | { | |
238 | const char *format = "tar"; | |
239 | const char *base = ""; | |
240 | int compression_level = -1; | |
241 | int verbose = 0; | |
242 | int i; | |
243 | ||
244 | for (i = 1; i < argc; i++) { | |
245 | const char *arg = argv[i]; | |
246 | ||
247 | if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) { | |
248 | for (i = 0; i < ARRAY_SIZE(archivers); i++) | |
249 | printf("%s\n", archivers[i].name); | |
250 | exit(0); | |
251 | } | |
252 | if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) { | |
253 | verbose = 1; | |
254 | continue; | |
255 | } | |
256 | if (!prefixcmp(arg, "--format=")) { | |
257 | format = arg + 9; | |
258 | continue; | |
259 | } | |
260 | if (!prefixcmp(arg, "--prefix=")) { | |
261 | base = arg + 9; | |
262 | continue; | |
263 | } | |
264 | if (!strcmp(arg, "--")) { | |
265 | i++; | |
266 | break; | |
267 | } | |
268 | if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0') { | |
269 | compression_level = arg[1] - '0'; | |
270 | continue; | |
271 | } | |
272 | if (arg[0] == '-') | |
273 | die("Unknown argument: %s", arg); | |
274 | break; | |
275 | } | |
276 | ||
277 | /* We need at least one parameter -- tree-ish */ | |
278 | if (argc - 1 < i) | |
279 | usage(archive_usage); | |
280 | *ar = lookup_archiver(format); | |
281 | if (!*ar) | |
282 | die("Unknown archive format '%s'", format); | |
283 | ||
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; | |
288 | else { | |
289 | die("Argument not supported for format '%s': -%d", | |
290 | format, compression_level); | |
291 | } | |
292 | } | |
293 | args->verbose = verbose; | |
294 | args->base = base; | |
295 | args->baselen = strlen(base); | |
296 | ||
297 | return i; | |
298 | } | |
299 | ||
6e94e683 RS |
300 | int write_archive(int argc, const char **argv, const char *prefix, |
301 | int setup_prefix) | |
302 | { | |
303 | const struct archiver *ar = NULL; | |
304 | struct archiver_args args; | |
305 | int tree_idx; | |
306 | ||
307 | tree_idx = parse_archive_args(argc, argv, &ar, &args); | |
308 | if (setup_prefix && prefix == NULL) | |
309 | prefix = setup_git_directory(); | |
310 | ||
311 | argv += tree_idx; | |
312 | parse_treeish_arg(argv, &args, prefix); | |
313 | parse_pathspec_arg(argv + 1, &args); | |
314 | ||
315 | return ar->write_archive(&args); | |
316 | } |