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a1bbc6c0 SB |
1 | #include "builtin.h" |
2 | #include "cache.h" | |
3 | #include "dir.h" | |
4 | #include "parse-options.h" | |
5 | #include "run-command.h" | |
6 | #include "sigchain.h" | |
7 | #include "strbuf.h" | |
8 | #include "string-list.h" | |
9 | #include "argv-array.h" | |
10 | ||
11 | static int delta_base_offset = 1; | |
12 | static char *packdir, *packtmp; | |
13 | ||
14 | static const char *const git_repack_usage[] = { | |
15 | N_("git repack [options]"), | |
16 | NULL | |
17 | }; | |
18 | ||
19 | static int repack_config(const char *var, const char *value, void *cb) | |
20 | { | |
21 | if (!strcmp(var, "repack.usedeltabaseoffset")) { | |
22 | delta_base_offset = git_config_bool(var, value); | |
23 | return 0; | |
24 | } | |
25 | return git_default_config(var, value, cb); | |
26 | } | |
27 | ||
28 | /* | |
29 | * Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files. | |
30 | */ | |
31 | static void remove_temporary_files(void) | |
32 | { | |
33 | struct strbuf buf = STRBUF_INIT; | |
34 | size_t dirlen, prefixlen; | |
35 | DIR *dir; | |
36 | struct dirent *e; | |
37 | ||
38 | dir = opendir(packdir); | |
39 | if (!dir) | |
40 | return; | |
41 | ||
42 | /* Point at the slash at the end of ".../objects/pack/" */ | |
43 | dirlen = strlen(packdir) + 1; | |
44 | strbuf_addstr(&buf, packtmp); | |
45 | /* Hold the length of ".tmp-%d-pack-" */ | |
46 | prefixlen = buf.len - dirlen; | |
47 | ||
48 | while ((e = readdir(dir))) { | |
49 | if (strncmp(e->d_name, buf.buf + dirlen, prefixlen)) | |
50 | continue; | |
51 | strbuf_setlen(&buf, dirlen); | |
52 | strbuf_addstr(&buf, e->d_name); | |
53 | unlink(buf.buf); | |
54 | } | |
55 | closedir(dir); | |
56 | strbuf_release(&buf); | |
57 | } | |
58 | ||
59 | static void remove_pack_on_signal(int signo) | |
60 | { | |
61 | remove_temporary_files(); | |
62 | sigchain_pop(signo); | |
63 | raise(signo); | |
64 | } | |
65 | ||
66 | /* | |
67 | * Adds all packs hex strings to the fname list, which do not | |
68 | * have a corresponding .keep file. | |
69 | */ | |
70 | static void get_non_kept_pack_filenames(struct string_list *fname_list) | |
71 | { | |
72 | DIR *dir; | |
73 | struct dirent *e; | |
74 | char *fname; | |
75 | size_t len; | |
76 | ||
77 | if (!(dir = opendir(packdir))) | |
78 | return; | |
79 | ||
80 | while ((e = readdir(dir)) != NULL) { | |
59556548 | 81 | if (!ends_with(e->d_name, ".pack")) |
a1bbc6c0 SB |
82 | continue; |
83 | ||
84 | len = strlen(e->d_name) - strlen(".pack"); | |
85 | fname = xmemdupz(e->d_name, len); | |
86 | ||
87 | if (!file_exists(mkpath("%s/%s.keep", packdir, fname))) | |
88 | string_list_append_nodup(fname_list, fname); | |
89 | else | |
90 | free(fname); | |
91 | } | |
92 | closedir(dir); | |
93 | } | |
94 | ||
95 | static void remove_redundant_pack(const char *dir_name, const char *base_name) | |
96 | { | |
97 | const char *exts[] = {".pack", ".idx", ".keep"}; | |
98 | int i; | |
99 | struct strbuf buf = STRBUF_INIT; | |
100 | size_t plen; | |
101 | ||
102 | strbuf_addf(&buf, "%s/%s", dir_name, base_name); | |
103 | plen = buf.len; | |
104 | ||
105 | for (i = 0; i < ARRAY_SIZE(exts); i++) { | |
106 | strbuf_setlen(&buf, plen); | |
107 | strbuf_addstr(&buf, exts[i]); | |
108 | unlink(buf.buf); | |
109 | } | |
110 | strbuf_release(&buf); | |
111 | } | |
112 | ||
113 | #define ALL_INTO_ONE 1 | |
114 | #define LOOSEN_UNREACHABLE 2 | |
115 | ||
116 | int cmd_repack(int argc, const char **argv, const char *prefix) | |
117 | { | |
118 | const char *exts[2] = {".pack", ".idx"}; | |
119 | struct child_process cmd; | |
120 | struct string_list_item *item; | |
121 | struct argv_array cmd_args = ARGV_ARRAY_INIT; | |
122 | struct string_list names = STRING_LIST_INIT_DUP; | |
123 | struct string_list rollback = STRING_LIST_INIT_NODUP; | |
124 | struct string_list existing_packs = STRING_LIST_INIT_DUP; | |
125 | struct strbuf line = STRBUF_INIT; | |
3e7b066e | 126 | int ext, ret, failed; |
a1bbc6c0 SB |
127 | FILE *out; |
128 | ||
129 | /* variables to be filled by option parsing */ | |
130 | int pack_everything = 0; | |
131 | int delete_redundant = 0; | |
132 | char *unpack_unreachable = NULL; | |
133 | int window = 0, window_memory = 0; | |
134 | int depth = 0; | |
135 | int max_pack_size = 0; | |
136 | int no_reuse_delta = 0, no_reuse_object = 0; | |
137 | int no_update_server_info = 0; | |
138 | int quiet = 0; | |
139 | int local = 0; | |
140 | ||
141 | struct option builtin_repack_options[] = { | |
142 | OPT_BIT('a', NULL, &pack_everything, | |
143 | N_("pack everything in a single pack"), ALL_INTO_ONE), | |
144 | OPT_BIT('A', NULL, &pack_everything, | |
145 | N_("same as -a, and turn unreachable objects loose"), | |
146 | LOOSEN_UNREACHABLE | ALL_INTO_ONE), | |
147 | OPT_BOOL('d', NULL, &delete_redundant, | |
148 | N_("remove redundant packs, and run git-prune-packed")), | |
149 | OPT_BOOL('f', NULL, &no_reuse_delta, | |
150 | N_("pass --no-reuse-delta to git-pack-objects")), | |
151 | OPT_BOOL('F', NULL, &no_reuse_object, | |
152 | N_("pass --no-reuse-object to git-pack-objects")), | |
153 | OPT_BOOL('n', NULL, &no_update_server_info, | |
154 | N_("do not run git-update-server-info")), | |
155 | OPT__QUIET(&quiet, N_("be quiet")), | |
156 | OPT_BOOL('l', "local", &local, | |
157 | N_("pass --local to git-pack-objects")), | |
158 | OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"), | |
159 | N_("with -A, do not loosen objects older than this")), | |
160 | OPT_INTEGER(0, "window", &window, | |
161 | N_("size of the window used for delta compression")), | |
162 | OPT_INTEGER(0, "window-memory", &window_memory, | |
163 | N_("same as the above, but limit memory size instead of entries count")), | |
164 | OPT_INTEGER(0, "depth", &depth, | |
165 | N_("limits the maximum delta depth")), | |
166 | OPT_INTEGER(0, "max-pack-size", &max_pack_size, | |
167 | N_("maximum size of each packfile")), | |
168 | OPT_END() | |
169 | }; | |
170 | ||
171 | git_config(repack_config, NULL); | |
172 | ||
173 | argc = parse_options(argc, argv, prefix, builtin_repack_options, | |
174 | git_repack_usage, 0); | |
175 | ||
176 | packdir = mkpathdup("%s/pack", get_object_directory()); | |
177 | packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid()); | |
178 | ||
179 | sigchain_push_common(remove_pack_on_signal); | |
180 | ||
181 | argv_array_push(&cmd_args, "pack-objects"); | |
182 | argv_array_push(&cmd_args, "--keep-true-parents"); | |
183 | argv_array_push(&cmd_args, "--honor-pack-keep"); | |
184 | argv_array_push(&cmd_args, "--non-empty"); | |
185 | argv_array_push(&cmd_args, "--all"); | |
186 | argv_array_push(&cmd_args, "--reflog"); | |
187 | if (window) | |
188 | argv_array_pushf(&cmd_args, "--window=%u", window); | |
189 | if (window_memory) | |
190 | argv_array_pushf(&cmd_args, "--window-memory=%u", window_memory); | |
191 | if (depth) | |
192 | argv_array_pushf(&cmd_args, "--depth=%u", depth); | |
193 | if (max_pack_size) | |
194 | argv_array_pushf(&cmd_args, "--max_pack_size=%u", max_pack_size); | |
195 | if (no_reuse_delta) | |
196 | argv_array_pushf(&cmd_args, "--no-reuse-delta"); | |
197 | if (no_reuse_object) | |
198 | argv_array_pushf(&cmd_args, "--no-reuse-object"); | |
199 | ||
200 | if (pack_everything & ALL_INTO_ONE) { | |
201 | get_non_kept_pack_filenames(&existing_packs); | |
202 | ||
203 | if (existing_packs.nr && delete_redundant) { | |
204 | if (unpack_unreachable) | |
205 | argv_array_pushf(&cmd_args, | |
206 | "--unpack-unreachable=%s", | |
207 | unpack_unreachable); | |
208 | else if (pack_everything & LOOSEN_UNREACHABLE) | |
209 | argv_array_push(&cmd_args, | |
210 | "--unpack-unreachable"); | |
211 | } | |
212 | } else { | |
213 | argv_array_push(&cmd_args, "--unpacked"); | |
214 | argv_array_push(&cmd_args, "--incremental"); | |
215 | } | |
216 | ||
217 | if (local) | |
218 | argv_array_push(&cmd_args, "--local"); | |
219 | if (quiet) | |
220 | argv_array_push(&cmd_args, "--quiet"); | |
221 | if (delta_base_offset) | |
222 | argv_array_push(&cmd_args, "--delta-base-offset"); | |
223 | ||
224 | argv_array_push(&cmd_args, packtmp); | |
225 | ||
226 | memset(&cmd, 0, sizeof(cmd)); | |
227 | cmd.argv = cmd_args.argv; | |
228 | cmd.git_cmd = 1; | |
229 | cmd.out = -1; | |
230 | cmd.no_stdin = 1; | |
231 | ||
232 | ret = start_command(&cmd); | |
233 | if (ret) | |
ffc9329f | 234 | return ret; |
a1bbc6c0 | 235 | |
a1bbc6c0 SB |
236 | out = xfdopen(cmd.out, "r"); |
237 | while (strbuf_getline(&line, out, '\n') != EOF) { | |
238 | if (line.len != 40) | |
239 | die("repack: Expecting 40 character sha1 lines only from pack-objects."); | |
240 | string_list_append(&names, line.buf); | |
a1bbc6c0 SB |
241 | } |
242 | fclose(out); | |
243 | ret = finish_command(&cmd); | |
244 | if (ret) | |
ffc9329f | 245 | return ret; |
a1bbc6c0 SB |
246 | argv_array_clear(&cmd_args); |
247 | ||
3e7b066e | 248 | if (!names.nr && !quiet) |
a1bbc6c0 SB |
249 | printf("Nothing new to pack.\n"); |
250 | ||
251 | /* | |
252 | * Ok we have prepared all new packfiles. | |
253 | * First see if there are packs of the same name and if so | |
254 | * if we can move them out of the way (this can happen if we | |
255 | * repacked immediately after packing fully. | |
256 | */ | |
257 | failed = 0; | |
258 | for_each_string_list_item(item, &names) { | |
259 | for (ext = 0; ext < 2; ext++) { | |
260 | char *fname, *fname_old; | |
261 | fname = mkpathdup("%s/%s%s", packdir, | |
262 | item->string, exts[ext]); | |
263 | if (!file_exists(fname)) { | |
264 | free(fname); | |
265 | continue; | |
266 | } | |
267 | ||
268 | fname_old = mkpath("%s/old-%s%s", packdir, | |
269 | item->string, exts[ext]); | |
270 | if (file_exists(fname_old)) | |
271 | if (unlink(fname_old)) | |
272 | failed = 1; | |
273 | ||
274 | if (!failed && rename(fname, fname_old)) { | |
275 | free(fname); | |
276 | failed = 1; | |
277 | break; | |
278 | } else { | |
279 | string_list_append(&rollback, fname); | |
280 | } | |
281 | } | |
282 | if (failed) | |
283 | break; | |
284 | } | |
285 | if (failed) { | |
286 | struct string_list rollback_failure = STRING_LIST_INIT_DUP; | |
287 | for_each_string_list_item(item, &rollback) { | |
288 | char *fname, *fname_old; | |
289 | fname = mkpathdup("%s/%s", packdir, item->string); | |
290 | fname_old = mkpath("%s/old-%s", packdir, item->string); | |
291 | if (rename(fname_old, fname)) | |
292 | string_list_append(&rollback_failure, fname); | |
293 | free(fname); | |
294 | } | |
295 | ||
296 | if (rollback_failure.nr) { | |
297 | int i; | |
298 | fprintf(stderr, | |
299 | "WARNING: Some packs in use have been renamed by\n" | |
300 | "WARNING: prefixing old- to their name, in order to\n" | |
301 | "WARNING: replace them with the new version of the\n" | |
302 | "WARNING: file. But the operation failed, and the\n" | |
303 | "WARNING: attempt to rename them back to their\n" | |
304 | "WARNING: original names also failed.\n" | |
305 | "WARNING: Please rename them in %s manually:\n", packdir); | |
306 | for (i = 0; i < rollback_failure.nr; i++) | |
307 | fprintf(stderr, "WARNING: old-%s -> %s\n", | |
308 | rollback_failure.items[i].string, | |
309 | rollback_failure.items[i].string); | |
310 | } | |
311 | exit(1); | |
312 | } | |
313 | ||
314 | /* Now the ones with the same name are out of the way... */ | |
315 | for_each_string_list_item(item, &names) { | |
316 | for (ext = 0; ext < 2; ext++) { | |
317 | char *fname, *fname_old; | |
318 | struct stat statbuffer; | |
319 | fname = mkpathdup("%s/pack-%s%s", | |
320 | packdir, item->string, exts[ext]); | |
321 | fname_old = mkpathdup("%s-%s%s", | |
322 | packtmp, item->string, exts[ext]); | |
323 | if (!stat(fname_old, &statbuffer)) { | |
324 | statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); | |
325 | chmod(fname_old, statbuffer.st_mode); | |
326 | } | |
327 | if (rename(fname_old, fname)) | |
0b63c6a5 | 328 | die_errno(_("renaming '%s' failed"), fname_old); |
a1bbc6c0 SB |
329 | free(fname); |
330 | free(fname_old); | |
331 | } | |
332 | } | |
333 | ||
334 | /* Remove the "old-" files */ | |
335 | for_each_string_list_item(item, &names) { | |
336 | for (ext = 0; ext < 2; ext++) { | |
337 | char *fname; | |
338 | fname = mkpath("%s/old-pack-%s%s", | |
339 | packdir, | |
340 | item->string, | |
341 | exts[ext]); | |
0b63c6a5 SB |
342 | if (remove_path(fname)) |
343 | warning(_("removing '%s' failed"), fname); | |
a1bbc6c0 SB |
344 | } |
345 | } | |
346 | ||
347 | /* End of pack replacement. */ | |
348 | ||
349 | if (delete_redundant) { | |
350 | sort_string_list(&names); | |
351 | for_each_string_list_item(item, &existing_packs) { | |
352 | char *sha1; | |
353 | size_t len = strlen(item->string); | |
354 | if (len < 40) | |
355 | continue; | |
356 | sha1 = item->string + len - 40; | |
357 | if (!string_list_has_string(&names, sha1)) | |
358 | remove_redundant_pack(packdir, item->string); | |
359 | } | |
360 | argv_array_push(&cmd_args, "prune-packed"); | |
361 | if (quiet) | |
362 | argv_array_push(&cmd_args, "--quiet"); | |
363 | ||
364 | memset(&cmd, 0, sizeof(cmd)); | |
365 | cmd.argv = cmd_args.argv; | |
366 | cmd.git_cmd = 1; | |
367 | run_command(&cmd); | |
368 | argv_array_clear(&cmd_args); | |
369 | } | |
370 | ||
371 | if (!no_update_server_info) { | |
372 | argv_array_push(&cmd_args, "update-server-info"); | |
373 | memset(&cmd, 0, sizeof(cmd)); | |
374 | cmd.argv = cmd_args.argv; | |
375 | cmd.git_cmd = 1; | |
376 | run_command(&cmd); | |
377 | argv_array_clear(&cmd_args); | |
378 | } | |
379 | remove_temporary_files(); | |
380 | string_list_clear(&names, 0); | |
381 | string_list_clear(&rollback, 0); | |
382 | string_list_clear(&existing_packs, 0); | |
383 | strbuf_release(&line); | |
384 | ||
385 | return 0; | |
386 | } |