mirror of
https://github.com/git/git
synced 2024-08-28 20:20:07 +00:00
![Elijah Newren](/assets/img/avatar_default.png)
The vast majority of files including object-store.h did not need dir.h nor khash.h. Split the header into two files, and let most just depend upon object-store-ll.h, while letting the two callers that need it depend on the full object-store.h. After this patch: $ git grep -h include..object-store | sort | uniq -c 2 #include "object-store.h" 129 #include "object-store-ll.h" Diff best viewed with `--color-moved`. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
321 lines
7.1 KiB
C
321 lines
7.1 KiB
C
#include "git-compat-util.h"
|
|
#include "tmp-objdir.h"
|
|
#include "abspath.h"
|
|
#include "chdir-notify.h"
|
|
#include "dir.h"
|
|
#include "environment.h"
|
|
#include "object-file.h"
|
|
#include "path.h"
|
|
#include "sigchain.h"
|
|
#include "string-list.h"
|
|
#include "strbuf.h"
|
|
#include "strvec.h"
|
|
#include "quote.h"
|
|
#include "object-store-ll.h"
|
|
|
|
struct tmp_objdir {
|
|
struct strbuf path;
|
|
struct strvec env;
|
|
struct object_directory *prev_odb;
|
|
int will_destroy;
|
|
};
|
|
|
|
/*
|
|
* Allow only one tmp_objdir at a time in a running process, which simplifies
|
|
* our atexit cleanup routines. It's doubtful callers will ever need
|
|
* more than one, and we can expand later if so. You can have many such
|
|
* tmp_objdirs simultaneously in many processes, of course.
|
|
*/
|
|
static struct tmp_objdir *the_tmp_objdir;
|
|
|
|
static void tmp_objdir_free(struct tmp_objdir *t)
|
|
{
|
|
strbuf_release(&t->path);
|
|
strvec_clear(&t->env);
|
|
free(t);
|
|
}
|
|
|
|
int tmp_objdir_destroy(struct tmp_objdir *t)
|
|
{
|
|
int err;
|
|
|
|
if (!t)
|
|
return 0;
|
|
|
|
if (t == the_tmp_objdir)
|
|
the_tmp_objdir = NULL;
|
|
|
|
if (t->prev_odb)
|
|
restore_primary_odb(t->prev_odb, t->path.buf);
|
|
|
|
err = remove_dir_recursively(&t->path, 0);
|
|
|
|
tmp_objdir_free(t);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void remove_tmp_objdir(void)
|
|
{
|
|
tmp_objdir_destroy(the_tmp_objdir);
|
|
}
|
|
|
|
void tmp_objdir_discard_objects(struct tmp_objdir *t)
|
|
{
|
|
remove_dir_recursively(&t->path, REMOVE_DIR_KEEP_TOPLEVEL);
|
|
}
|
|
|
|
/*
|
|
* These env_* functions are for setting up the child environment; the
|
|
* "replace" variant overrides the value of any existing variable with that
|
|
* "key". The "append" variant puts our new value at the end of a list,
|
|
* separated by PATH_SEP (which is what separate values in
|
|
* GIT_ALTERNATE_OBJECT_DIRECTORIES).
|
|
*/
|
|
static void env_append(struct strvec *env, const char *key, const char *val)
|
|
{
|
|
struct strbuf quoted = STRBUF_INIT;
|
|
const char *old;
|
|
|
|
/*
|
|
* Avoid quoting if it's not necessary, for maximum compatibility
|
|
* with older parsers which don't understand the quoting.
|
|
*/
|
|
if (*val == '"' || strchr(val, PATH_SEP)) {
|
|
strbuf_addch("ed, '"');
|
|
quote_c_style(val, "ed, NULL, 1);
|
|
strbuf_addch("ed, '"');
|
|
val = quoted.buf;
|
|
}
|
|
|
|
old = getenv(key);
|
|
if (!old)
|
|
strvec_pushf(env, "%s=%s", key, val);
|
|
else
|
|
strvec_pushf(env, "%s=%s%c%s", key, old, PATH_SEP, val);
|
|
|
|
strbuf_release("ed);
|
|
}
|
|
|
|
static void env_replace(struct strvec *env, const char *key, const char *val)
|
|
{
|
|
strvec_pushf(env, "%s=%s", key, val);
|
|
}
|
|
|
|
static int setup_tmp_objdir(const char *root)
|
|
{
|
|
char *path;
|
|
int ret = 0;
|
|
|
|
path = xstrfmt("%s/pack", root);
|
|
ret = mkdir(path, 0777);
|
|
free(path);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct tmp_objdir *tmp_objdir_create(const char *prefix)
|
|
{
|
|
static int installed_handlers;
|
|
struct tmp_objdir *t;
|
|
|
|
if (the_tmp_objdir)
|
|
BUG("only one tmp_objdir can be used at a time");
|
|
|
|
t = xcalloc(1, sizeof(*t));
|
|
strbuf_init(&t->path, 0);
|
|
strvec_init(&t->env);
|
|
|
|
/*
|
|
* Use a string starting with tmp_ so that the builtin/prune.c code
|
|
* can recognize any stale objdirs left behind by a crash and delete
|
|
* them.
|
|
*/
|
|
strbuf_addf(&t->path, "%s/tmp_objdir-%s-XXXXXX", get_object_directory(), prefix);
|
|
|
|
if (!mkdtemp(t->path.buf)) {
|
|
/* free, not destroy, as we never touched the filesystem */
|
|
tmp_objdir_free(t);
|
|
return NULL;
|
|
}
|
|
|
|
the_tmp_objdir = t;
|
|
if (!installed_handlers) {
|
|
atexit(remove_tmp_objdir);
|
|
installed_handlers++;
|
|
}
|
|
|
|
if (setup_tmp_objdir(t->path.buf)) {
|
|
tmp_objdir_destroy(t);
|
|
return NULL;
|
|
}
|
|
|
|
env_append(&t->env, ALTERNATE_DB_ENVIRONMENT,
|
|
absolute_path(get_object_directory()));
|
|
env_replace(&t->env, DB_ENVIRONMENT, absolute_path(t->path.buf));
|
|
env_replace(&t->env, GIT_QUARANTINE_ENVIRONMENT,
|
|
absolute_path(t->path.buf));
|
|
|
|
return t;
|
|
}
|
|
|
|
/*
|
|
* Make sure we copy packfiles and their associated metafiles in the correct
|
|
* order. All of these ends_with checks are slightly expensive to do in
|
|
* the midst of a sorting routine, but in practice it shouldn't matter.
|
|
* We will have a relatively small number of packfiles to order, and loose
|
|
* objects exit early in the first line.
|
|
*/
|
|
static int pack_copy_priority(const char *name)
|
|
{
|
|
if (!starts_with(name, "pack"))
|
|
return 0;
|
|
if (ends_with(name, ".keep"))
|
|
return 1;
|
|
if (ends_with(name, ".pack"))
|
|
return 2;
|
|
if (ends_with(name, ".rev"))
|
|
return 3;
|
|
if (ends_with(name, ".idx"))
|
|
return 4;
|
|
return 5;
|
|
}
|
|
|
|
static int pack_copy_cmp(const char *a, const char *b)
|
|
{
|
|
return pack_copy_priority(a) - pack_copy_priority(b);
|
|
}
|
|
|
|
static int read_dir_paths(struct string_list *out, const char *path)
|
|
{
|
|
DIR *dh;
|
|
struct dirent *de;
|
|
|
|
dh = opendir(path);
|
|
if (!dh)
|
|
return -1;
|
|
|
|
while ((de = readdir(dh)))
|
|
if (de->d_name[0] != '.')
|
|
string_list_append(out, de->d_name);
|
|
|
|
closedir(dh);
|
|
return 0;
|
|
}
|
|
|
|
static int migrate_paths(struct strbuf *src, struct strbuf *dst);
|
|
|
|
static int migrate_one(struct strbuf *src, struct strbuf *dst)
|
|
{
|
|
struct stat st;
|
|
|
|
if (stat(src->buf, &st) < 0)
|
|
return -1;
|
|
if (S_ISDIR(st.st_mode)) {
|
|
if (!mkdir(dst->buf, 0777)) {
|
|
if (adjust_shared_perm(dst->buf))
|
|
return -1;
|
|
} else if (errno != EEXIST)
|
|
return -1;
|
|
return migrate_paths(src, dst);
|
|
}
|
|
return finalize_object_file(src->buf, dst->buf);
|
|
}
|
|
|
|
static int migrate_paths(struct strbuf *src, struct strbuf *dst)
|
|
{
|
|
size_t src_len = src->len, dst_len = dst->len;
|
|
struct string_list paths = STRING_LIST_INIT_DUP;
|
|
int i;
|
|
int ret = 0;
|
|
|
|
if (read_dir_paths(&paths, src->buf) < 0)
|
|
return -1;
|
|
paths.cmp = pack_copy_cmp;
|
|
string_list_sort(&paths);
|
|
|
|
for (i = 0; i < paths.nr; i++) {
|
|
const char *name = paths.items[i].string;
|
|
|
|
strbuf_addf(src, "/%s", name);
|
|
strbuf_addf(dst, "/%s", name);
|
|
|
|
ret |= migrate_one(src, dst);
|
|
|
|
strbuf_setlen(src, src_len);
|
|
strbuf_setlen(dst, dst_len);
|
|
}
|
|
|
|
string_list_clear(&paths, 0);
|
|
return ret;
|
|
}
|
|
|
|
int tmp_objdir_migrate(struct tmp_objdir *t)
|
|
{
|
|
struct strbuf src = STRBUF_INIT, dst = STRBUF_INIT;
|
|
int ret;
|
|
|
|
if (!t)
|
|
return 0;
|
|
|
|
if (t->prev_odb) {
|
|
if (the_repository->objects->odb->will_destroy)
|
|
BUG("migrating an ODB that was marked for destruction");
|
|
restore_primary_odb(t->prev_odb, t->path.buf);
|
|
t->prev_odb = NULL;
|
|
}
|
|
|
|
strbuf_addbuf(&src, &t->path);
|
|
strbuf_addstr(&dst, get_object_directory());
|
|
|
|
ret = migrate_paths(&src, &dst);
|
|
|
|
strbuf_release(&src);
|
|
strbuf_release(&dst);
|
|
|
|
tmp_objdir_destroy(t);
|
|
return ret;
|
|
}
|
|
|
|
const char **tmp_objdir_env(const struct tmp_objdir *t)
|
|
{
|
|
if (!t)
|
|
return NULL;
|
|
return t->env.v;
|
|
}
|
|
|
|
void tmp_objdir_add_as_alternate(const struct tmp_objdir *t)
|
|
{
|
|
add_to_alternates_memory(t->path.buf);
|
|
}
|
|
|
|
void tmp_objdir_replace_primary_odb(struct tmp_objdir *t, int will_destroy)
|
|
{
|
|
if (t->prev_odb)
|
|
BUG("the primary object database is already replaced");
|
|
t->prev_odb = set_temporary_primary_odb(t->path.buf, will_destroy);
|
|
t->will_destroy = will_destroy;
|
|
}
|
|
|
|
struct tmp_objdir *tmp_objdir_unapply_primary_odb(void)
|
|
{
|
|
if (!the_tmp_objdir || !the_tmp_objdir->prev_odb)
|
|
return NULL;
|
|
|
|
restore_primary_odb(the_tmp_objdir->prev_odb, the_tmp_objdir->path.buf);
|
|
the_tmp_objdir->prev_odb = NULL;
|
|
return the_tmp_objdir;
|
|
}
|
|
|
|
void tmp_objdir_reapply_primary_odb(struct tmp_objdir *t, const char *old_cwd,
|
|
const char *new_cwd)
|
|
{
|
|
char *path;
|
|
|
|
path = reparent_relative_path(old_cwd, new_cwd, t->path.buf);
|
|
strbuf_reset(&t->path);
|
|
strbuf_addstr(&t->path, path);
|
|
free(path);
|
|
tmp_objdir_replace_primary_odb(t, t->will_destroy);
|
|
}
|