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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 | ||
12 | const struct archiver archivers[] = { | |
13 | { "tar", write_tar_archive }, | |
14 | { "zip", write_zip_archive, USES_ZLIB_COMPRESSION }, | |
15 | }; | |
16 | ||
18125644 LH |
17 | static void format_subst(const struct commit *commit, |
18 | const char *src, size_t len, | |
19 | struct strbuf *buf) | |
20 | { | |
21 | char *to_free = NULL; | |
22 | struct strbuf fmt; | |
23 | ||
24 | if (src == buf->buf) | |
25 | to_free = strbuf_detach(buf, NULL); | |
26 | strbuf_init(&fmt, 0); | |
27 | for (;;) { | |
28 | const char *b, *c; | |
29 | ||
30 | b = memmem(src, len, "$Format:", 8); | |
75b7dfbd | 31 | if (!b) |
18125644 | 32 | break; |
75b7dfbd | 33 | c = memchr(b + 8, '$', (src + len) - b - 8); |
18125644 LH |
34 | if (!c) |
35 | break; | |
36 | ||
37 | strbuf_reset(&fmt); | |
38 | strbuf_add(&fmt, b + 8, c - b - 8); | |
39 | ||
40 | strbuf_add(buf, src, b - src); | |
41 | format_commit_message(commit, fmt.buf, buf); | |
42 | len -= c + 1 - src; | |
43 | src = c + 1; | |
44 | } | |
45 | strbuf_add(buf, src, len); | |
46 | strbuf_release(&fmt); | |
47 | free(to_free); | |
48 | } | |
49 | ||
1d11d5bb RS |
50 | static void *sha1_file_to_archive(const char *path, const unsigned char *sha1, |
51 | unsigned int mode, enum object_type *type, | |
52 | unsigned long *sizep, const struct commit *commit) | |
18125644 LH |
53 | { |
54 | void *buffer; | |
55 | ||
56 | buffer = read_sha1_file(sha1, type, sizep); | |
57 | if (buffer && S_ISREG(mode)) { | |
58 | struct strbuf buf; | |
59 | size_t size = 0; | |
60 | ||
61 | strbuf_init(&buf, 0); | |
62 | strbuf_attach(&buf, buffer, *sizep, *sizep + 1); | |
63 | convert_to_working_tree(path, buf.buf, buf.len, &buf); | |
1d11d5bb RS |
64 | if (commit) |
65 | format_subst(commit, buf.buf, buf.len, &buf); | |
18125644 LH |
66 | buffer = strbuf_detach(&buf, &size); |
67 | *sizep = size; | |
68 | } | |
69 | ||
70 | return buffer; | |
71 | } | |
72 | ||
1d11d5bb | 73 | static void setup_archive_check(struct git_attr_check *check) |
008d896d RS |
74 | { |
75 | static struct git_attr *attr_export_ignore; | |
1d11d5bb | 76 | static struct git_attr *attr_export_subst; |
008d896d | 77 | |
1d11d5bb | 78 | if (!attr_export_ignore) { |
008d896d | 79 | attr_export_ignore = git_attr("export-ignore", 13); |
1d11d5bb RS |
80 | attr_export_subst = git_attr("export-subst", 12); |
81 | } | |
008d896d | 82 | check[0].attr = attr_export_ignore; |
1d11d5bb | 83 | check[1].attr = attr_export_subst; |
008d896d | 84 | } |
562e25ab RS |
85 | |
86 | struct archiver_context { | |
87 | struct archiver_args *args; | |
88 | write_archive_entry_fn_t write_entry; | |
89 | }; | |
90 | ||
91 | static int write_archive_entry(const unsigned char *sha1, const char *base, | |
92 | int baselen, const char *filename, unsigned mode, int stage, | |
93 | void *context) | |
94 | { | |
95 | static struct strbuf path = STRBUF_INIT; | |
96 | struct archiver_context *c = context; | |
97 | struct archiver_args *args = c->args; | |
98 | write_archive_entry_fn_t write_entry = c->write_entry; | |
1d11d5bb RS |
99 | struct git_attr_check check[2]; |
100 | const char *path_without_prefix; | |
101 | int convert = 0; | |
562e25ab RS |
102 | int err; |
103 | enum object_type type; | |
104 | unsigned long size; | |
105 | void *buffer; | |
106 | ||
107 | strbuf_reset(&path); | |
108 | strbuf_grow(&path, PATH_MAX); | |
109 | strbuf_add(&path, base, baselen); | |
110 | strbuf_addstr(&path, filename); | |
1d11d5bb | 111 | path_without_prefix = path.buf + args->baselen; |
562e25ab | 112 | |
1d11d5bb RS |
113 | setup_archive_check(check); |
114 | if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) { | |
115 | if (ATTR_TRUE(check[0].value)) | |
116 | return 0; | |
117 | convert = ATTR_TRUE(check[1].value); | |
118 | } | |
562e25ab RS |
119 | |
120 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { | |
121 | strbuf_addch(&path, '/'); | |
122 | if (args->verbose) | |
123 | fprintf(stderr, "%.*s\n", (int)path.len, path.buf); | |
124 | err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0); | |
125 | if (err) | |
126 | return err; | |
127 | return READ_TREE_RECURSIVE; | |
128 | } | |
129 | ||
1d11d5bb RS |
130 | buffer = sha1_file_to_archive(path_without_prefix, sha1, mode, |
131 | &type, &size, convert ? args->commit : NULL); | |
562e25ab RS |
132 | if (!buffer) |
133 | return error("cannot read %s", sha1_to_hex(sha1)); | |
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, buffer, size); | |
137 | free(buffer); | |
138 | return err; | |
139 | } | |
140 | ||
141 | int write_archive_entries(struct archiver_args *args, | |
142 | write_archive_entry_fn_t write_entry) | |
143 | { | |
144 | struct archiver_context context; | |
145 | int err; | |
146 | ||
147 | if (args->baselen > 0 && args->base[args->baselen - 1] == '/') { | |
148 | size_t len = args->baselen; | |
149 | ||
150 | while (len > 1 && args->base[len - 2] == '/') | |
151 | len--; | |
152 | if (args->verbose) | |
153 | fprintf(stderr, "%.*s\n", (int)len, args->base); | |
154 | err = write_entry(args, args->tree->object.sha1, args->base, | |
155 | len, 040777, NULL, 0); | |
156 | if (err) | |
157 | return err; | |
158 | } | |
159 | ||
160 | context.args = args; | |
161 | context.write_entry = write_entry; | |
162 | ||
163 | err = read_tree_recursive(args->tree, args->base, args->baselen, 0, | |
164 | args->pathspec, write_archive_entry, &context); | |
165 | if (err == READ_TREE_RECURSIVE) | |
166 | err = 0; | |
167 | return err; | |
168 | } | |
6e94e683 | 169 | |
c0885435 RS |
170 | static const struct archiver *lookup_archiver(const char *name) |
171 | { | |
172 | int i; | |
173 | ||
174 | for (i = 0; i < ARRAY_SIZE(archivers); i++) { | |
175 | if (!strcmp(name, archivers[i].name)) | |
176 | return &archivers[i]; | |
177 | } | |
178 | return NULL; | |
179 | } | |
180 | ||
181 | static void parse_pathspec_arg(const char **pathspec, | |
182 | struct archiver_args *ar_args) | |
183 | { | |
184 | ar_args->pathspec = get_pathspec(ar_args->base, pathspec); | |
185 | } | |
186 | ||
187 | static void parse_treeish_arg(const char **argv, | |
188 | struct archiver_args *ar_args, const char *prefix) | |
189 | { | |
190 | const char *name = argv[0]; | |
191 | const unsigned char *commit_sha1; | |
192 | time_t archive_time; | |
193 | struct tree *tree; | |
194 | const struct commit *commit; | |
195 | unsigned char sha1[20]; | |
196 | ||
197 | if (get_sha1(name, sha1)) | |
198 | die("Not a valid object name"); | |
199 | ||
200 | commit = lookup_commit_reference_gently(sha1, 1); | |
201 | if (commit) { | |
202 | commit_sha1 = commit->object.sha1; | |
203 | archive_time = commit->date; | |
204 | } else { | |
205 | commit_sha1 = NULL; | |
206 | archive_time = time(NULL); | |
207 | } | |
208 | ||
209 | tree = parse_tree_indirect(sha1); | |
210 | if (tree == NULL) | |
211 | die("not a tree object"); | |
212 | ||
213 | if (prefix) { | |
214 | unsigned char tree_sha1[20]; | |
215 | unsigned int mode; | |
216 | int err; | |
217 | ||
218 | err = get_tree_entry(tree->object.sha1, prefix, | |
219 | tree_sha1, &mode); | |
220 | if (err || !S_ISDIR(mode)) | |
221 | die("current working directory is untracked"); | |
222 | ||
223 | tree = parse_tree_indirect(tree_sha1); | |
224 | } | |
225 | ar_args->tree = tree; | |
226 | ar_args->commit_sha1 = commit_sha1; | |
227 | ar_args->commit = commit; | |
228 | ar_args->time = archive_time; | |
229 | } | |
230 | ||
231 | static int parse_archive_args(int argc, const char **argv, | |
232 | const struct archiver **ar, struct archiver_args *args) | |
233 | { | |
234 | const char *format = "tar"; | |
235 | const char *base = ""; | |
236 | int compression_level = -1; | |
237 | int verbose = 0; | |
238 | int i; | |
239 | ||
240 | for (i = 1; i < argc; i++) { | |
241 | const char *arg = argv[i]; | |
242 | ||
243 | if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) { | |
244 | for (i = 0; i < ARRAY_SIZE(archivers); i++) | |
245 | printf("%s\n", archivers[i].name); | |
246 | exit(0); | |
247 | } | |
248 | if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) { | |
249 | verbose = 1; | |
250 | continue; | |
251 | } | |
252 | if (!prefixcmp(arg, "--format=")) { | |
253 | format = arg + 9; | |
254 | continue; | |
255 | } | |
256 | if (!prefixcmp(arg, "--prefix=")) { | |
257 | base = arg + 9; | |
258 | continue; | |
259 | } | |
260 | if (!strcmp(arg, "--")) { | |
261 | i++; | |
262 | break; | |
263 | } | |
264 | if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0') { | |
265 | compression_level = arg[1] - '0'; | |
266 | continue; | |
267 | } | |
268 | if (arg[0] == '-') | |
269 | die("Unknown argument: %s", arg); | |
270 | break; | |
271 | } | |
272 | ||
273 | /* We need at least one parameter -- tree-ish */ | |
274 | if (argc - 1 < i) | |
275 | usage(archive_usage); | |
276 | *ar = lookup_archiver(format); | |
277 | if (!*ar) | |
278 | die("Unknown archive format '%s'", format); | |
279 | ||
280 | args->compression_level = Z_DEFAULT_COMPRESSION; | |
281 | if (compression_level != -1) { | |
282 | if ((*ar)->flags & USES_ZLIB_COMPRESSION) | |
283 | args->compression_level = compression_level; | |
284 | else { | |
285 | die("Argument not supported for format '%s': -%d", | |
286 | format, compression_level); | |
287 | } | |
288 | } | |
289 | args->verbose = verbose; | |
290 | args->base = base; | |
291 | args->baselen = strlen(base); | |
292 | ||
293 | return i; | |
294 | } | |
295 | ||
6e94e683 RS |
296 | int write_archive(int argc, const char **argv, const char *prefix, |
297 | int setup_prefix) | |
298 | { | |
299 | const struct archiver *ar = NULL; | |
300 | struct archiver_args args; | |
301 | int tree_idx; | |
302 | ||
303 | tree_idx = parse_archive_args(argc, argv, &ar, &args); | |
304 | if (setup_prefix && prefix == NULL) | |
305 | prefix = setup_git_directory(); | |
306 | ||
307 | argv += tree_idx; | |
308 | parse_treeish_arg(argv, &args, prefix); | |
309 | parse_pathspec_arg(argv + 1, &args); | |
310 | ||
311 | return ar->write_archive(&args); | |
312 | } |