Merge branch 'ye/doc-http-proto' into maint
[git.git] / builtin / repack.c
blob36c1cf9c2544d579e2b12116e731c0f6cb7dfb71
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"
11 static int delta_base_offset = 1;
12 static int pack_kept_objects = -1;
13 static int write_bitmaps = -1;
14 static char *packdir, *packtmp;
16 static const char *const git_repack_usage[] = {
17 N_("git repack [options]"),
18 NULL
21 static int repack_config(const char *var, const char *value, void *cb)
23 if (!strcmp(var, "repack.usedeltabaseoffset")) {
24 delta_base_offset = git_config_bool(var, value);
25 return 0;
27 if (!strcmp(var, "repack.packkeptobjects")) {
28 pack_kept_objects = git_config_bool(var, value);
29 return 0;
31 if (!strcmp(var, "pack.writebitmaps")) {
32 write_bitmaps = git_config_bool(var, value);
33 return 0;
35 return git_default_config(var, value, cb);
39 * Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
41 static void remove_temporary_files(void)
43 struct strbuf buf = STRBUF_INIT;
44 size_t dirlen, prefixlen;
45 DIR *dir;
46 struct dirent *e;
48 dir = opendir(packdir);
49 if (!dir)
50 return;
52 /* Point at the slash at the end of ".../objects/pack/" */
53 dirlen = strlen(packdir) + 1;
54 strbuf_addstr(&buf, packtmp);
55 /* Hold the length of ".tmp-%d-pack-" */
56 prefixlen = buf.len - dirlen;
58 while ((e = readdir(dir))) {
59 if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
60 continue;
61 strbuf_setlen(&buf, dirlen);
62 strbuf_addstr(&buf, e->d_name);
63 unlink(buf.buf);
65 closedir(dir);
66 strbuf_release(&buf);
69 static void remove_pack_on_signal(int signo)
71 remove_temporary_files();
72 sigchain_pop(signo);
73 raise(signo);
77 * Adds all packs hex strings to the fname list, which do not
78 * have a corresponding .keep file.
80 static void get_non_kept_pack_filenames(struct string_list *fname_list)
82 DIR *dir;
83 struct dirent *e;
84 char *fname;
85 size_t len;
87 if (!(dir = opendir(packdir)))
88 return;
90 while ((e = readdir(dir)) != NULL) {
91 if (!ends_with(e->d_name, ".pack"))
92 continue;
94 len = strlen(e->d_name) - strlen(".pack");
95 fname = xmemdupz(e->d_name, len);
97 if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
98 string_list_append_nodup(fname_list, fname);
99 else
100 free(fname);
102 closedir(dir);
105 static void remove_redundant_pack(const char *dir_name, const char *base_name)
107 const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
108 int i;
109 struct strbuf buf = STRBUF_INIT;
110 size_t plen;
112 strbuf_addf(&buf, "%s/%s", dir_name, base_name);
113 plen = buf.len;
115 for (i = 0; i < ARRAY_SIZE(exts); i++) {
116 strbuf_setlen(&buf, plen);
117 strbuf_addstr(&buf, exts[i]);
118 unlink(buf.buf);
120 strbuf_release(&buf);
123 #define ALL_INTO_ONE 1
124 #define LOOSEN_UNREACHABLE 2
126 int cmd_repack(int argc, const char **argv, const char *prefix)
128 struct {
129 const char *name;
130 unsigned optional:1;
131 } exts[] = {
132 {".pack"},
133 {".idx"},
134 {".bitmap", 1},
136 struct child_process cmd;
137 struct string_list_item *item;
138 struct argv_array cmd_args = ARGV_ARRAY_INIT;
139 struct string_list names = STRING_LIST_INIT_DUP;
140 struct string_list rollback = STRING_LIST_INIT_NODUP;
141 struct string_list existing_packs = STRING_LIST_INIT_DUP;
142 struct strbuf line = STRBUF_INIT;
143 int ext, ret, failed;
144 FILE *out;
146 /* variables to be filled by option parsing */
147 int pack_everything = 0;
148 int delete_redundant = 0;
149 const char *unpack_unreachable = NULL;
150 const char *window = NULL, *window_memory = NULL;
151 const char *depth = NULL;
152 const char *max_pack_size = NULL;
153 int no_reuse_delta = 0, no_reuse_object = 0;
154 int no_update_server_info = 0;
155 int quiet = 0;
156 int local = 0;
158 struct option builtin_repack_options[] = {
159 OPT_BIT('a', NULL, &pack_everything,
160 N_("pack everything in a single pack"), ALL_INTO_ONE),
161 OPT_BIT('A', NULL, &pack_everything,
162 N_("same as -a, and turn unreachable objects loose"),
163 LOOSEN_UNREACHABLE | ALL_INTO_ONE),
164 OPT_BOOL('d', NULL, &delete_redundant,
165 N_("remove redundant packs, and run git-prune-packed")),
166 OPT_BOOL('f', NULL, &no_reuse_delta,
167 N_("pass --no-reuse-delta to git-pack-objects")),
168 OPT_BOOL('F', NULL, &no_reuse_object,
169 N_("pass --no-reuse-object to git-pack-objects")),
170 OPT_BOOL('n', NULL, &no_update_server_info,
171 N_("do not run git-update-server-info")),
172 OPT__QUIET(&quiet, N_("be quiet")),
173 OPT_BOOL('l', "local", &local,
174 N_("pass --local to git-pack-objects")),
175 OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
176 N_("write bitmap index")),
177 OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
178 N_("with -A, do not loosen objects older than this")),
179 OPT_STRING(0, "window", &window, N_("n"),
180 N_("size of the window used for delta compression")),
181 OPT_STRING(0, "window-memory", &window_memory, N_("bytes"),
182 N_("same as the above, but limit memory size instead of entries count")),
183 OPT_STRING(0, "depth", &depth, N_("n"),
184 N_("limits the maximum delta depth")),
185 OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
186 N_("maximum size of each packfile")),
187 OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
188 N_("repack objects in packs marked with .keep")),
189 OPT_END()
192 git_config(repack_config, NULL);
194 argc = parse_options(argc, argv, prefix, builtin_repack_options,
195 git_repack_usage, 0);
197 if (pack_kept_objects < 0)
198 pack_kept_objects = write_bitmaps > 0;
200 packdir = mkpathdup("%s/pack", get_object_directory());
201 packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
203 sigchain_push_common(remove_pack_on_signal);
205 argv_array_push(&cmd_args, "pack-objects");
206 argv_array_push(&cmd_args, "--keep-true-parents");
207 if (!pack_kept_objects)
208 argv_array_push(&cmd_args, "--honor-pack-keep");
209 argv_array_push(&cmd_args, "--non-empty");
210 argv_array_push(&cmd_args, "--all");
211 argv_array_push(&cmd_args, "--reflog");
212 if (window)
213 argv_array_pushf(&cmd_args, "--window=%s", window);
214 if (window_memory)
215 argv_array_pushf(&cmd_args, "--window-memory=%s", window_memory);
216 if (depth)
217 argv_array_pushf(&cmd_args, "--depth=%s", depth);
218 if (max_pack_size)
219 argv_array_pushf(&cmd_args, "--max-pack-size=%s", max_pack_size);
220 if (no_reuse_delta)
221 argv_array_pushf(&cmd_args, "--no-reuse-delta");
222 if (no_reuse_object)
223 argv_array_pushf(&cmd_args, "--no-reuse-object");
224 if (write_bitmaps >= 0)
225 argv_array_pushf(&cmd_args, "--%swrite-bitmap-index",
226 write_bitmaps ? "" : "no-");
228 if (pack_everything & ALL_INTO_ONE) {
229 get_non_kept_pack_filenames(&existing_packs);
231 if (existing_packs.nr && delete_redundant) {
232 if (unpack_unreachable)
233 argv_array_pushf(&cmd_args,
234 "--unpack-unreachable=%s",
235 unpack_unreachable);
236 else if (pack_everything & LOOSEN_UNREACHABLE)
237 argv_array_push(&cmd_args,
238 "--unpack-unreachable");
240 } else {
241 argv_array_push(&cmd_args, "--unpacked");
242 argv_array_push(&cmd_args, "--incremental");
245 if (local)
246 argv_array_push(&cmd_args, "--local");
247 if (quiet)
248 argv_array_push(&cmd_args, "--quiet");
249 if (delta_base_offset)
250 argv_array_push(&cmd_args, "--delta-base-offset");
252 argv_array_push(&cmd_args, packtmp);
254 memset(&cmd, 0, sizeof(cmd));
255 cmd.argv = cmd_args.argv;
256 cmd.git_cmd = 1;
257 cmd.out = -1;
258 cmd.no_stdin = 1;
260 ret = start_command(&cmd);
261 if (ret)
262 return ret;
264 out = xfdopen(cmd.out, "r");
265 while (strbuf_getline(&line, out, '\n') != EOF) {
266 if (line.len != 40)
267 die("repack: Expecting 40 character sha1 lines only from pack-objects.");
268 string_list_append(&names, line.buf);
270 fclose(out);
271 ret = finish_command(&cmd);
272 if (ret)
273 return ret;
274 argv_array_clear(&cmd_args);
276 if (!names.nr && !quiet)
277 printf("Nothing new to pack.\n");
280 * Ok we have prepared all new packfiles.
281 * First see if there are packs of the same name and if so
282 * if we can move them out of the way (this can happen if we
283 * repacked immediately after packing fully.
285 failed = 0;
286 for_each_string_list_item(item, &names) {
287 for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
288 char *fname, *fname_old;
289 fname = mkpathdup("%s/pack-%s%s", packdir,
290 item->string, exts[ext].name);
291 if (!file_exists(fname)) {
292 free(fname);
293 continue;
296 fname_old = mkpath("%s/old-%s%s", packdir,
297 item->string, exts[ext].name);
298 if (file_exists(fname_old))
299 if (unlink(fname_old))
300 failed = 1;
302 if (!failed && rename(fname, fname_old)) {
303 free(fname);
304 failed = 1;
305 break;
306 } else {
307 string_list_append(&rollback, fname);
310 if (failed)
311 break;
313 if (failed) {
314 struct string_list rollback_failure = STRING_LIST_INIT_DUP;
315 for_each_string_list_item(item, &rollback) {
316 char *fname, *fname_old;
317 fname = mkpathdup("%s/%s", packdir, item->string);
318 fname_old = mkpath("%s/old-%s", packdir, item->string);
319 if (rename(fname_old, fname))
320 string_list_append(&rollback_failure, fname);
321 free(fname);
324 if (rollback_failure.nr) {
325 int i;
326 fprintf(stderr,
327 "WARNING: Some packs in use have been renamed by\n"
328 "WARNING: prefixing old- to their name, in order to\n"
329 "WARNING: replace them with the new version of the\n"
330 "WARNING: file. But the operation failed, and the\n"
331 "WARNING: attempt to rename them back to their\n"
332 "WARNING: original names also failed.\n"
333 "WARNING: Please rename them in %s manually:\n", packdir);
334 for (i = 0; i < rollback_failure.nr; i++)
335 fprintf(stderr, "WARNING: old-%s -> %s\n",
336 rollback_failure.items[i].string,
337 rollback_failure.items[i].string);
339 exit(1);
342 /* Now the ones with the same name are out of the way... */
343 for_each_string_list_item(item, &names) {
344 for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
345 char *fname, *fname_old;
346 struct stat statbuffer;
347 int exists = 0;
348 fname = mkpathdup("%s/pack-%s%s",
349 packdir, item->string, exts[ext].name);
350 fname_old = mkpathdup("%s-%s%s",
351 packtmp, item->string, exts[ext].name);
352 if (!stat(fname_old, &statbuffer)) {
353 statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
354 chmod(fname_old, statbuffer.st_mode);
355 exists = 1;
357 if (exists || !exts[ext].optional) {
358 if (rename(fname_old, fname))
359 die_errno(_("renaming '%s' failed"), fname_old);
361 free(fname);
362 free(fname_old);
366 /* Remove the "old-" files */
367 for_each_string_list_item(item, &names) {
368 for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
369 char *fname;
370 fname = mkpath("%s/old-%s%s",
371 packdir,
372 item->string,
373 exts[ext].name);
374 if (remove_path(fname))
375 warning(_("removing '%s' failed"), fname);
379 /* End of pack replacement. */
381 if (delete_redundant) {
382 sort_string_list(&names);
383 for_each_string_list_item(item, &existing_packs) {
384 char *sha1;
385 size_t len = strlen(item->string);
386 if (len < 40)
387 continue;
388 sha1 = item->string + len - 40;
389 if (!string_list_has_string(&names, sha1))
390 remove_redundant_pack(packdir, item->string);
392 argv_array_push(&cmd_args, "prune-packed");
393 if (quiet)
394 argv_array_push(&cmd_args, "--quiet");
396 memset(&cmd, 0, sizeof(cmd));
397 cmd.argv = cmd_args.argv;
398 cmd.git_cmd = 1;
399 run_command(&cmd);
400 argv_array_clear(&cmd_args);
403 if (!no_update_server_info) {
404 argv_array_push(&cmd_args, "update-server-info");
405 memset(&cmd, 0, sizeof(cmd));
406 cmd.argv = cmd_args.argv;
407 cmd.git_cmd = 1;
408 run_command(&cmd);
409 argv_array_clear(&cmd_args);
411 remove_temporary_files();
412 string_list_clear(&names, 0);
413 string_list_clear(&rollback, 0);
414 string_list_clear(&existing_packs, 0);
415 strbuf_release(&line);
417 return 0;