зеркало из https://github.com/microsoft/git.git
Merge branch 'jc/lockfile'
* jc/lockfile: ref-log: style fixes. refs.c: convert it to use lockfile interface. Make index file locking code reusable to others.
This commit is contained in:
Junio C Hamano
Коммит
9941afc051
2
Makefile
2
Makefile
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|
@ -210,7 +210,7 @@ DIFF_OBJS = \
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LIB_OBJS = \
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blob.o commit.o connect.o csum-file.o cache-tree.o base85.o \
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date.o diff-delta.o entry.o exec_cmd.o ident.o index.o \
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date.o diff-delta.o entry.o exec_cmd.o ident.o lockfile.o \
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object.o pack-check.o patch-delta.o path.o pkt-line.o \
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quote.o read-cache.o refs.o run-command.o dir.o \
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server-info.o setup.o sha1_file.o sha1_name.o strbuf.o \
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@ -122,7 +122,7 @@ static int add_file_to_index(const char *path, int verbose)
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return 0;
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}
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static struct cache_file cache_file;
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static struct lock_file lock_file;
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int cmd_add(int argc, const char **argv, char **envp)
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{
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@ -134,9 +134,9 @@ int cmd_add(int argc, const char **argv, char **envp)
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git_config(git_default_config);
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newfd = hold_index_file_for_update(&cache_file, get_index_file());
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newfd = hold_lock_file_for_update(&lock_file, get_index_file());
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if (newfd < 0)
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die("unable to create new cachefile");
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die("unable to create new index file");
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if (read_cache() < 0)
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die("index file corrupt");
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@ -181,7 +181,7 @@ int cmd_add(int argc, const char **argv, char **envp)
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if (active_cache_changed) {
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if (write_cache(newfd, active_cache, active_nr) ||
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commit_index_file(&cache_file))
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commit_lock_file(&lock_file))
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die("Unable to write new index file");
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}
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@ -2072,7 +2072,7 @@ static void write_out_results(struct patch *list, int skipped_patch)
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}
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}
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static struct cache_file cache_file;
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static struct lock_file lock_file;
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static struct excludes {
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struct excludes *next;
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@ -2133,8 +2133,12 @@ static int apply_patch(int fd, const char *filename)
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apply = 0;
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write_index = check_index && apply;
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if (write_index && newfd < 0)
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newfd = hold_index_file_for_update(&cache_file, get_index_file());
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if (write_index && newfd < 0) {
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newfd = hold_lock_file_for_update(&lock_file,
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get_index_file());
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if (newfd < 0)
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die("unable to create new index file");
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}
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if (check_index) {
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if (read_cache() < 0)
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die("unable to read index file");
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@ -2312,8 +2316,8 @@ int cmd_apply(int argc, const char **argv, char **envp)
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if (write_index) {
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if (write_cache(newfd, active_cache, active_nr) ||
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commit_index_file(&cache_file))
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die("Unable to write new cachefile");
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commit_lock_file(&lock_file))
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die("Unable to write new index file");
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}
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return 0;
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@ -853,7 +853,7 @@ static void prime_cache_tree(void)
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static const char read_tree_usage[] = "git-read-tree (<sha> | -m [--aggressive] [-u | -i] <sha1> [<sha2> [<sha3>]])";
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static struct cache_file cache_file;
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static struct lock_file lock_file;
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int cmd_read_tree(int argc, const char **argv, char **envp)
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{
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@ -864,9 +864,9 @@ int cmd_read_tree(int argc, const char **argv, char **envp)
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setup_git_directory();
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git_config(git_default_config);
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newfd = hold_index_file_for_update(&cache_file, get_index_file());
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newfd = hold_lock_file_for_update(&lock_file, get_index_file());
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if (newfd < 0)
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die("unable to create new cachefile");
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die("unable to create new index file");
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git_config(git_default_config);
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@ -981,7 +981,7 @@ int cmd_read_tree(int argc, const char **argv, char **envp)
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}
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if (write_cache(newfd, active_cache, active_nr) ||
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commit_index_file(&cache_file))
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commit_lock_file(&lock_file))
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die("unable to write new index file");
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return 0;
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}
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@ -41,7 +41,7 @@ static int remove_file(const char *name)
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return ret;
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}
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static struct cache_file cache_file;
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static struct lock_file lock_file;
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int cmd_rm(int argc, const char **argv, char **envp)
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{
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@ -53,7 +53,7 @@ int cmd_rm(int argc, const char **argv, char **envp)
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git_config(git_default_config);
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newfd = hold_index_file_for_update(&cache_file, get_index_file());
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newfd = hold_lock_file_for_update(&lock_file, get_index_file());
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if (newfd < 0)
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die("unable to create new index file");
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@ -144,7 +144,7 @@ int cmd_rm(int argc, const char **argv, char **envp)
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if (active_cache_changed) {
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if (write_cache(newfd, active_cache, active_nr) ||
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commit_index_file(&cache_file))
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commit_lock_file(&lock_file))
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die("Unable to write new index file");
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}
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12
cache.h
12
cache.h
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@ -167,13 +167,13 @@ extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
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#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
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extern int refresh_cache(unsigned int flags);
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struct cache_file {
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struct cache_file *next;
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char lockfile[PATH_MAX];
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struct lock_file {
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struct lock_file *next;
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char filename[PATH_MAX];
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};
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extern int hold_index_file_for_update(struct cache_file *, const char *path);
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extern int commit_index_file(struct cache_file *);
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extern void rollback_index_file(struct cache_file *);
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extern int hold_lock_file_for_update(struct lock_file *, const char *path);
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extern int commit_lock_file(struct lock_file *);
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extern void rollback_lock_file(struct lock_file *);
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/* Environment bits from configuration mechanism */
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extern int trust_executable_bit;
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@ -168,7 +168,7 @@ static int checkout_all(void)
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static const char checkout_cache_usage[] =
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"git-checkout-index [-u] [-q] [-a] [-f] [-n] [--stage=[123]|all] [--prefix=<string>] [--temp] [--] <file>...";
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static struct cache_file cache_file;
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static struct lock_file lock_file;
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int main(int argc, char **argv)
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{
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@ -211,9 +211,8 @@ int main(int argc, char **argv)
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if (!strcmp(arg, "-u") || !strcmp(arg, "--index")) {
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state.refresh_cache = 1;
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if (newfd < 0)
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newfd = hold_index_file_for_update
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(&cache_file,
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get_index_file());
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newfd = hold_lock_file_for_update
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(&lock_file, get_index_file());
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if (newfd < 0)
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die("cannot open index.lock file.");
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continue;
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@ -262,7 +261,7 @@ int main(int argc, char **argv)
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*/
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if (state.refresh_cache) {
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close(newfd); newfd = -1;
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rollback_index_file(&cache_file);
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rollback_lock_file(&lock_file);
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}
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state.refresh_cache = 0;
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}
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@ -312,7 +311,7 @@ int main(int argc, char **argv)
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if (0 <= newfd &&
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(write_cache(newfd, active_cache, active_nr) ||
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commit_index_file(&cache_file)))
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die("Unable to write new cachefile");
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commit_lock_file(&lock_file)))
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die("Unable to write new index file");
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return 0;
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}
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6
fetch.c
6
fetch.c
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@ -150,7 +150,8 @@ static int process(struct object *obj)
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if (has_sha1_file(obj->sha1)) {
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/* We already have it, so we should scan it now. */
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obj->flags |= TO_SCAN;
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} else {
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}
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else {
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if (obj->flags & COMPLETE)
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return 0;
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prefetch(obj->sha1);
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@ -255,7 +256,8 @@ int pull(char *target)
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if (write_ref_log_details) {
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msg = xmalloc(strlen(write_ref_log_details) + 12);
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sprintf(msg, "fetch from %s", write_ref_log_details);
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} else
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}
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else
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msg = NULL;
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ret = write_ref_sha1(lock, sha1, msg ? msg : "fetch (unknown)");
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if (msg)
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57
index.c
57
index.c
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@ -1,57 +0,0 @@
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/*
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* Copyright (c) 2005, Junio C Hamano
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*/
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#include <signal.h>
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#include "cache.h"
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static struct cache_file *cache_file_list;
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static void remove_lock_file(void)
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{
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while (cache_file_list) {
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if (cache_file_list->lockfile[0])
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unlink(cache_file_list->lockfile);
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cache_file_list = cache_file_list->next;
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}
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}
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static void remove_lock_file_on_signal(int signo)
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{
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remove_lock_file();
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signal(SIGINT, SIG_DFL);
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raise(signo);
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}
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int hold_index_file_for_update(struct cache_file *cf, const char *path)
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{
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int fd;
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sprintf(cf->lockfile, "%s.lock", path);
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fd = open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666);
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if (fd >=0 && !cf->next) {
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cf->next = cache_file_list;
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cache_file_list = cf;
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signal(SIGINT, remove_lock_file_on_signal);
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atexit(remove_lock_file);
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}
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return fd;
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}
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int commit_index_file(struct cache_file *cf)
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{
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char indexfile[PATH_MAX];
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int i;
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strcpy(indexfile, cf->lockfile);
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i = strlen(indexfile) - 5; /* .lock */
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indexfile[i] = 0;
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i = rename(cf->lockfile, indexfile);
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cf->lockfile[0] = 0;
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return i;
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}
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void rollback_index_file(struct cache_file *cf)
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{
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if (cf->lockfile[0])
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unlink(cf->lockfile);
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cf->lockfile[0] = 0;
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}
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@ -0,0 +1,57 @@
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/*
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* Copyright (c) 2005, Junio C Hamano
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*/
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#include <signal.h>
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#include "cache.h"
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static struct lock_file *lock_file_list;
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static void remove_lock_file(void)
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{
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while (lock_file_list) {
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if (lock_file_list->filename[0])
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unlink(lock_file_list->filename);
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lock_file_list = lock_file_list->next;
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}
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}
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static void remove_lock_file_on_signal(int signo)
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{
|
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remove_lock_file();
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signal(SIGINT, SIG_DFL);
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raise(signo);
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}
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int hold_lock_file_for_update(struct lock_file *lk, const char *path)
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{
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int fd;
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sprintf(lk->filename, "%s.lock", path);
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fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
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if (fd >=0 && !lk->next) {
|
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lk->next = lock_file_list;
|
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lock_file_list = lk;
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signal(SIGINT, remove_lock_file_on_signal);
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atexit(remove_lock_file);
|
||||
}
|
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return fd;
|
||||
}
|
||||
|
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int commit_lock_file(struct lock_file *lk)
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||||
{
|
||||
char result_file[PATH_MAX];
|
||||
int i;
|
||||
strcpy(result_file, lk->filename);
|
||||
i = strlen(result_file) - 5; /* .lock */
|
||||
result_file[i] = 0;
|
||||
i = rename(lk->filename, result_file);
|
||||
lk->filename[0] = 0;
|
||||
return i;
|
||||
}
|
||||
|
||||
void rollback_lock_file(struct lock_file *lk)
|
||||
{
|
||||
if (lk->filename[0])
|
||||
unlink(lk->filename);
|
||||
lk->filename[0] = 0;
|
||||
}
|
||||
|
||||
40
refs.c
40
refs.c
|
|
@ -259,7 +259,7 @@ int check_ref_format(const char *ref)
|
|||
}
|
||||
}
|
||||
|
||||
static struct ref_lock* verify_lock(struct ref_lock *lock,
|
||||
static struct ref_lock *verify_lock(struct ref_lock *lock,
|
||||
const unsigned char *old_sha1, int mustexist)
|
||||
{
|
||||
char buf[40];
|
||||
|
|
@ -285,7 +285,7 @@ static struct ref_lock* verify_lock(struct ref_lock *lock,
|
|||
return lock;
|
||||
}
|
||||
|
||||
static struct ref_lock* lock_ref_sha1_basic(const char *path,
|
||||
static struct ref_lock *lock_ref_sha1_basic(const char *path,
|
||||
int plen,
|
||||
const unsigned char *old_sha1, int mustexist)
|
||||
{
|
||||
|
|
@ -301,19 +301,18 @@ static struct ref_lock* lock_ref_sha1_basic(const char *path,
|
|||
unlock_ref(lock);
|
||||
return NULL;
|
||||
}
|
||||
lock->lk = xcalloc(1, sizeof(struct lock_file));
|
||||
|
||||
lock->ref_file = strdup(path);
|
||||
lock->lock_file = strdup(mkpath("%s.lock", lock->ref_file));
|
||||
lock->log_file = strdup(git_path("logs/%s", lock->ref_file + plen));
|
||||
lock->force_write = lstat(lock->ref_file, &st) && errno == ENOENT;
|
||||
|
||||
if (safe_create_leading_directories(lock->lock_file))
|
||||
die("unable to create directory for %s", lock->lock_file);
|
||||
lock->lock_fd = open(lock->lock_file,
|
||||
O_WRONLY | O_CREAT | O_EXCL, 0666);
|
||||
if (safe_create_leading_directories(lock->ref_file))
|
||||
die("unable to create directory for %s", lock->ref_file);
|
||||
lock->lock_fd = hold_lock_file_for_update(lock->lk, lock->ref_file);
|
||||
if (lock->lock_fd < 0) {
|
||||
error("Couldn't open lock file %s: %s",
|
||||
lock->lock_file, strerror(errno));
|
||||
lock->lk->filename, strerror(errno));
|
||||
unlock_ref(lock);
|
||||
return NULL;
|
||||
}
|
||||
|
|
@ -321,7 +320,7 @@ static struct ref_lock* lock_ref_sha1_basic(const char *path,
|
|||
return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
|
||||
}
|
||||
|
||||
struct ref_lock* lock_ref_sha1(const char *ref,
|
||||
struct ref_lock *lock_ref_sha1(const char *ref,
|
||||
const unsigned char *old_sha1, int mustexist)
|
||||
{
|
||||
if (check_ref_format(ref))
|
||||
|
|
@ -330,23 +329,23 @@ struct ref_lock* lock_ref_sha1(const char *ref,
|
|||
5 + strlen(ref), old_sha1, mustexist);
|
||||
}
|
||||
|
||||
struct ref_lock* lock_any_ref_for_update(const char *ref,
|
||||
struct ref_lock *lock_any_ref_for_update(const char *ref,
|
||||
const unsigned char *old_sha1, int mustexist)
|
||||
{
|
||||
return lock_ref_sha1_basic(git_path("%s", ref),
|
||||
strlen(ref), old_sha1, mustexist);
|
||||
}
|
||||
|
||||
void unlock_ref (struct ref_lock *lock)
|
||||
void unlock_ref(struct ref_lock *lock)
|
||||
{
|
||||
if (lock->lock_fd >= 0) {
|
||||
close(lock->lock_fd);
|
||||
unlink(lock->lock_file);
|
||||
/* Do not free lock->lk -- atexit() still looks at them */
|
||||
if (lock->lk)
|
||||
rollback_lock_file(lock->lk);
|
||||
}
|
||||
if (lock->ref_file)
|
||||
free(lock->ref_file);
|
||||
if (lock->lock_file)
|
||||
free(lock->lock_file);
|
||||
if (lock->log_file)
|
||||
free(lock->log_file);
|
||||
free(lock);
|
||||
|
|
@ -385,7 +384,8 @@ static int log_ref_write(struct ref_lock *lock,
|
|||
sha1_to_hex(sha1),
|
||||
comitter,
|
||||
msg);
|
||||
} else {
|
||||
}
|
||||
else {
|
||||
maxlen = strlen(comitter) + 2*40 + 4;
|
||||
logrec = xmalloc(maxlen);
|
||||
len = snprintf(logrec, maxlen, "%s %s %s\n",
|
||||
|
|
@ -415,7 +415,7 @@ int write_ref_sha1(struct ref_lock *lock,
|
|||
if (write(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
|
||||
write(lock->lock_fd, &term, 1) != 1
|
||||
|| close(lock->lock_fd) < 0) {
|
||||
error("Couldn't write %s", lock->lock_file);
|
||||
error("Couldn't write %s", lock->lk->filename);
|
||||
unlock_ref(lock);
|
||||
return -1;
|
||||
}
|
||||
|
|
@ -423,7 +423,7 @@ int write_ref_sha1(struct ref_lock *lock,
|
|||
unlock_ref(lock);
|
||||
return -1;
|
||||
}
|
||||
if (rename(lock->lock_file, lock->ref_file) < 0) {
|
||||
if (commit_lock_file(lock->lk)) {
|
||||
error("Couldn't set %s", lock->ref_file);
|
||||
unlock_ref(lock);
|
||||
return -1;
|
||||
|
|
@ -478,10 +478,12 @@ int read_ref_at(const char *ref, unsigned long at_time, unsigned char *sha1)
|
|||
"warning: Log %s has gap after %s.\n",
|
||||
logfile, show_rfc2822_date(date, tz));
|
||||
}
|
||||
} else if (date == at_time) {
|
||||
}
|
||||
else if (date == at_time) {
|
||||
if (get_sha1_hex(rec + 41, sha1))
|
||||
die("Log %s is corrupt.", logfile);
|
||||
} else {
|
||||
}
|
||||
else {
|
||||
if (get_sha1_hex(rec + 41, logged_sha1))
|
||||
die("Log %s is corrupt.", logfile);
|
||||
if (memcmp(logged_sha1, sha1, 20)) {
|
||||
|
|
|
|||
8
refs.h
8
refs.h
|
|
@ -3,8 +3,8 @@
|
|||
|
||||
struct ref_lock {
|
||||
char *ref_file;
|
||||
char *lock_file;
|
||||
char *log_file;
|
||||
struct lock_file *lk;
|
||||
unsigned char old_sha1[20];
|
||||
int lock_fd;
|
||||
int force_write;
|
||||
|
|
@ -24,13 +24,13 @@ extern int for_each_remote_ref(int (*fn)(const char *path, const unsigned char *
|
|||
extern int get_ref_sha1(const char *ref, unsigned char *sha1);
|
||||
|
||||
/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
|
||||
extern struct ref_lock* lock_ref_sha1(const char *ref, const unsigned char *old_sha1, int mustexist);
|
||||
extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1, int mustexist);
|
||||
|
||||
/** Locks any ref (for 'HEAD' type refs). */
|
||||
extern struct ref_lock* lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int mustexist);
|
||||
extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int mustexist);
|
||||
|
||||
/** Release any lock taken but not written. **/
|
||||
extern void unlock_ref (struct ref_lock *lock);
|
||||
extern void unlock_ref(struct ref_lock *lock);
|
||||
|
||||
/** Writes sha1 into the ref specified by the lock. **/
|
||||
extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
|
||||
|
|
|
|||
|
|
@ -186,7 +186,7 @@ static void chmod_path(int flip, const char *path)
|
|||
die("git-update-index: cannot chmod %cx '%s'", flip, path);
|
||||
}
|
||||
|
||||
static struct cache_file cache_file;
|
||||
static struct lock_file lock_file;
|
||||
|
||||
static void update_one(const char *path, const char *prefix, int prefix_length)
|
||||
{
|
||||
|
|
@ -489,9 +489,9 @@ int main(int argc, const char **argv)
|
|||
|
||||
git_config(git_default_config);
|
||||
|
||||
newfd = hold_index_file_for_update(&cache_file, get_index_file());
|
||||
newfd = hold_lock_file_for_update(&lock_file, get_index_file());
|
||||
if (newfd < 0)
|
||||
die("unable to create new cachefile");
|
||||
die("unable to create new index file");
|
||||
|
||||
entries = read_cache();
|
||||
if (entries < 0)
|
||||
|
|
@ -645,8 +645,8 @@ int main(int argc, const char **argv)
|
|||
finish:
|
||||
if (active_cache_changed) {
|
||||
if (write_cache(newfd, active_cache, active_nr) ||
|
||||
commit_index_file(&cache_file))
|
||||
die("Unable to write new cachefile");
|
||||
commit_lock_file(&lock_file))
|
||||
die("Unable to write new index file");
|
||||
}
|
||||
|
||||
return has_errors ? 1 : 0;
|
||||
|
|
|
|||
|
|
@ -11,7 +11,7 @@ static int missing_ok = 0;
|
|||
|
||||
static const char write_tree_usage[] = "git-write-tree [--missing-ok]";
|
||||
|
||||
static struct cache_file cache_file;
|
||||
static struct lock_file lock_file;
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
|
|
@ -19,7 +19,7 @@ int main(int argc, char **argv)
|
|||
|
||||
setup_git_directory();
|
||||
|
||||
newfd = hold_index_file_for_update(&cache_file, get_index_file());
|
||||
newfd = hold_lock_file_for_update(&lock_file, get_index_file());
|
||||
entries = read_cache();
|
||||
if (argc == 2) {
|
||||
if (!strcmp(argv[1], "--missing-ok"))
|
||||
|
|
@ -45,7 +45,7 @@ int main(int argc, char **argv)
|
|||
die("git-write-tree: error building trees");
|
||||
if (0 <= newfd) {
|
||||
if (!write_cache(newfd, active_cache, active_nr))
|
||||
commit_index_file(&cache_file);
|
||||
commit_lock_file(&lock_file);
|
||||
}
|
||||
/* Not being able to write is fine -- we are only interested
|
||||
* in updating the cache-tree part, and if the next caller
|
||||
|
|
|
|||
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