#include "cache.h"
+#include "refs.h"
#include "pkt-line.h"
+#include "run-command.h"
#include <sys/wait.h>
static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
-static const char *unpacker = "git-unpack-objects";
+static const char unpacker[] = "git-unpack-objects";
-static void show_ref(const char *path, unsigned char *sha1)
+static int show_ref(const char *path, const unsigned char *sha1)
{
packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
+ return 0;
}
-static int read_ref(const char *path, unsigned char *sha1)
-{
- int ret = -1;
- int fd = open(path, O_RDONLY);
-
- if (fd >= 0) {
- char buffer[60];
- if (read(fd, buffer, sizeof(buffer)) >= 40)
- ret = get_sha1_hex(buffer, sha1);
- close(fd);
- }
- return ret;
-}
-
-static void write_head_info(const char *base)
+static void write_head_info(void)
{
- DIR *dir = opendir(base);
-
- if (dir) {
- struct dirent *de;
- int baselen = strlen(base);
- char *path = xmalloc(baselen + 257);
- memcpy(path, base, baselen);
-
- while ((de = readdir(dir)) != NULL) {
- char sha1[20];
- struct stat st;
- int namelen;
-
- if (de->d_name[0] == '.')
- continue;
- namelen = strlen(de->d_name);
- if (namelen > 255)
- continue;
- memcpy(path + baselen, de->d_name, namelen+1);
- if (lstat(path, &st) < 0)
- continue;
- if (S_ISDIR(st.st_mode)) {
- path[baselen + namelen] = '/';
- path[baselen + namelen + 1] = 0;
- write_head_info(path);
- continue;
- }
- if (read_ref(path, sha1) < 0)
- continue;
- if (!has_sha1_file(sha1))
- continue;
- show_ref(path, sha1);
- }
- free(path);
- closedir(dir);
- }
+ for_each_ref(show_ref);
}
struct command {
struct command *next;
+ unsigned char updated;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
char ref_name[0];
};
-struct command *commands = NULL;
+static struct command *commands = NULL;
static int is_all_zeroes(const char *hex)
{
return 0;
}
-static void update(const char *name, unsigned char *old_sha1, unsigned char *new_sha1)
+static char update_hook[] = "hooks/update";
+
+static int run_update_hook(const char *refname,
+ char *old_hex, char *new_hex)
+{
+ int code;
+
+ if (access(update_hook, X_OK) < 0)
+ return 0;
+ code = run_command(update_hook, refname, old_hex, new_hex, NULL);
+ switch (code) {
+ case 0:
+ return 0;
+ case -ERR_RUN_COMMAND_FORK:
+ die("hook fork failed");
+ case -ERR_RUN_COMMAND_EXEC:
+ die("hook execute failed");
+ case -ERR_RUN_COMMAND_WAITPID:
+ die("waitpid failed");
+ case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
+ die("waitpid is confused");
+ case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
+ fprintf(stderr, "%s died of signal", update_hook);
+ return -1;
+ case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
+ die("%s died strangely", update_hook);
+ default:
+ error("%s exited with error code %d", update_hook, -code);
+ return -code;
+ }
+}
+
+static int update(const char *name,
+ unsigned char *old_sha1, unsigned char *new_sha1)
{
char new_hex[60], *old_hex, *lock_name;
int newfd, namelen, written;
+ if (!strncmp(name, "refs/", 5) && check_ref_format(name + 5))
+ return error("refusing to create funny ref '%s' locally",
+ name);
+
namelen = strlen(name);
lock_name = xmalloc(namelen + 10);
memcpy(lock_name, name, namelen);
strcpy(new_hex, sha1_to_hex(new_sha1));
old_hex = sha1_to_hex(old_sha1);
if (!has_sha1_file(new_sha1))
- die("unpack should have generated %s, but I can't find it!", new_hex);
+ return error("unpack should have generated %s, "
+ "but I can't find it!", new_hex);
- newfd = open(lock_name, O_CREAT | O_EXCL | O_WRONLY, 0644);
+ safe_create_leading_directories(lock_name);
+
+ newfd = open(lock_name, O_CREAT | O_EXCL | O_WRONLY, 0666);
if (newfd < 0)
- die("unable to create %s (%s)", lock_name, strerror(errno));
+ return error("unable to create %s (%s)",
+ lock_name, strerror(errno));
/* Write the ref with an ending '\n' */
new_hex[40] = '\n';
close(newfd);
if (written != 41) {
unlink(lock_name);
- die("unable to write %s", lock_name);
+ return error("unable to write %s", lock_name);
}
if (verify_old_ref(name, old_hex) < 0) {
unlink(lock_name);
- die("%s changed during push", name);
+ return error("%s changed during push", name);
}
- if (rename(lock_name, name) < 0) {
+ if (run_update_hook(name, old_hex, new_hex)) {
unlink(lock_name);
- die("unable to replace %s", name);
+ return error("hook declined to update %s\n", name);
+ }
+ else if (rename(lock_name, name) < 0) {
+ unlink(lock_name);
+ return error("unable to replace %s", name);
+ }
+ else {
+ fprintf(stderr, "%s: %s -> %s\n", name, old_hex, new_hex);
+ return 0;
}
- fprintf(stderr, "%s: %s -> %s\n", name, old_hex, new_hex);
}
+static char update_post_hook[] = "hooks/post-update";
+
+static void run_update_post_hook(struct command *cmd)
+{
+ struct command *cmd_p;
+ int argc;
+ char **argv;
+
+ if (access(update_post_hook, X_OK) < 0)
+ return;
+ for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
+ if (!cmd_p->updated)
+ continue;
+ argc++;
+ }
+ argv = xmalloc(sizeof(*argv) * (1 + argc));
+ argv[0] = update_post_hook;
+
+ for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
+ if (!cmd_p->updated)
+ continue;
+ argv[argc] = xmalloc(strlen(cmd_p->ref_name) + 1);
+ strcpy(argv[argc], cmd_p->ref_name);
+ argc++;
+ }
+ argv[argc] = NULL;
+ run_command_v(argc, argv);
+}
/*
* This gets called after(if) we've successfully
struct command *cmd = commands;
while (cmd) {
- update(cmd->ref_name, cmd->old_sha1, cmd->new_sha1);
+ cmd->updated = !update(cmd->ref_name,
+ cmd->old_sha1, cmd->new_sha1);
cmd = cmd->next;
}
+ run_update_post_hook(commands);
}
static void read_head_info(void)
static void unpack(void)
{
- pid_t pid = fork();
-
- if (pid < 0)
+ int code = run_command(unpacker, NULL);
+ switch (code) {
+ case 0:
+ return;
+ case -ERR_RUN_COMMAND_FORK:
die("unpack fork failed");
- if (!pid) {
- execlp(unpacker, unpacker, NULL);
+ case -ERR_RUN_COMMAND_EXEC:
die("unpack execute failed");
- }
-
- for (;;) {
- int status, code;
- int retval = waitpid(pid, &status, 0);
-
- if (retval < 0) {
- if (errno == EINTR)
- continue;
- die("waitpid failed (%s)", strerror(retval));
- }
- if (retval != pid)
- die("waitpid is confused");
- if (WIFSIGNALED(status))
- die("%s died of signal %d", unpacker, WTERMSIG(status));
- if (!WIFEXITED(status))
- die("%s died out of really strange complications", unpacker);
- code = WEXITSTATUS(status);
- if (code)
- die("%s exited with error code %d", unpacker, code);
- return;
+ case -ERR_RUN_COMMAND_WAITPID:
+ die("waitpid failed");
+ case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
+ die("waitpid is confused");
+ case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
+ die("%s died of signal", unpacker);
+ case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
+ die("%s died strangely", unpacker);
+ default:
+ die("%s exited with error code %d", unpacker, -code);
}
}
/* chdir to the directory. If that fails, try appending ".git" */
if (chdir(dir) < 0) {
- static char path[PATH_MAX];
- snprintf(path, sizeof(path), "%s.git", dir);
- if (chdir(path) < 0)
+ if (chdir(mkpath("%s.git", dir)) < 0)
die("unable to cd to %s", dir);
}
/* If we have a ".git" directory, chdir to it */
chdir(".git");
- setenv("GIT_DIR", ".", 1);
+ putenv("GIT_DIR=.");
if (access("objects", X_OK) < 0 || access("refs/heads", X_OK) < 0)
die("%s doesn't appear to be a git directory", dir);
- write_head_info("refs/");
+ write_head_info();
/* EOF */
packet_flush(1);