#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[] = { "unpack-objects", NULL };
+
+static int report_status = 0;
+
+static char capabilities[] = "report-status";
+static int capabilities_sent = 0;
static int show_ref(const char *path, const unsigned char *sha1)
{
- packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
+ if (capabilities_sent)
+ packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
+ else
+ packet_write(1, "%s %s%c%s\n",
+ sha1_to_hex(sha1), path, 0, capabilities);
+ capabilities_sent = 1;
return 0;
}
static void write_head_info(void)
{
for_each_ref(show_ref);
+ if (!capabilities_sent)
+ show_ref("capabilities^{}", null_sha1);
+
}
struct command {
struct command *next;
+ const char *error_string;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
- char ref_name[0];
+ char ref_name[FLEX_ARRAY]; /* more */
};
-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:
+ return error("hook fork failed");
+ case -ERR_RUN_COMMAND_EXEC:
+ return error("hook execute failed");
+ case -ERR_RUN_COMMAND_WAITPID:
+ return error("waitpid failed");
+ case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
+ return error("waitpid is confused");
+ case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
+ return error("%s died of signal", update_hook);
+ case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
+ return error("%s died strangely", update_hook);
+ default:
+ error("%s exited with error code %d", update_hook, -code);
+ return -code;
+ }
+}
+
+static int update(struct command *cmd)
+{
+ const char *name = cmd->ref_name;
+ unsigned char *old_sha1 = cmd->old_sha1;
+ unsigned char *new_sha1 = cmd->new_sha1;
char new_hex[60], *old_hex, *lock_name;
int newfd, namelen, written;
+ cmd->error_string = NULL;
+ if (!strncmp(name, "refs/", 5) && check_ref_format(name + 5)) {
+ cmd->error_string = "funny refname";
+ 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);
+ if (!has_sha1_file(new_sha1)) {
+ cmd->error_string = "bad pack";
+ return error("unpack should have generated %s, "
+ "but I can't find it!", new_hex);
+ }
+ safe_create_leading_directories(lock_name);
- newfd = open(lock_name, O_CREAT | O_EXCL | O_WRONLY, 0644);
- if (newfd < 0)
- die("unable to create %s (%s)", lock_name, strerror(errno));
+ newfd = open(lock_name, O_CREAT | O_EXCL | O_WRONLY, 0666);
+ if (newfd < 0) {
+ cmd->error_string = "can't lock";
+ 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);
+ cmd->error_string = "can't write";
+ 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);
+ cmd->error_string = "raced";
+ 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);
+ cmd->error_string = "hook declined";
+ return error("hook declined to update %s", name);
+ }
+ else if (rename(lock_name, name) < 0) {
+ unlink(lock_name);
+ cmd->error_string = "can't rename";
+ 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;
+ const 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->error_string)
+ 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) {
+ char *p;
+ if (cmd_p->error_string)
+ continue;
+ p = xmalloc(strlen(cmd_p->ref_name) + 1);
+ strcpy(p, cmd_p->ref_name);
+ argv[argc] = p;
+ argc++;
+ }
+ argv[argc] = NULL;
+ run_command_v_opt(argc, argv, RUN_COMMAND_NO_STDIO);
+}
/*
* This gets called after(if) we've successfully
struct command *cmd = commands;
while (cmd) {
- update(cmd->ref_name, cmd->old_sha1, cmd->new_sha1);
+ update(cmd);
cmd = cmd->next;
}
+ run_update_post_hook(commands);
}
static void read_head_info(void)
static char line[1000];
unsigned char old_sha1[20], new_sha1[20];
struct command *cmd;
- int len;
+ char *refname;
+ int len, reflen;
len = packet_read_line(0, line, sizeof(line));
if (!len)
line[81] != ' ' ||
get_sha1_hex(line, old_sha1) ||
get_sha1_hex(line + 41, new_sha1))
- die("protocol error: expected old/new/ref, got '%s'", line);
+ die("protocol error: expected old/new/ref, got '%s'",
+ line);
+
+ refname = line + 82;
+ reflen = strlen(refname);
+ if (reflen + 82 < len) {
+ if (strstr(refname + reflen + 1, "report-status"))
+ report_status = 1;
+ }
cmd = xmalloc(sizeof(struct command) + len - 80);
memcpy(cmd->old_sha1, old_sha1, 20);
memcpy(cmd->new_sha1, new_sha1, 20);
memcpy(cmd->ref_name, line + 82, len - 81);
+ cmd->error_string = "n/a (unpacker error)";
cmd->next = NULL;
*p = cmd;
p = &cmd->next;
}
}
-static void unpack(void)
+static const char *unpack(int *error_code)
{
- pid_t pid = fork();
-
- if (pid < 0)
- die("unpack fork failed");
- if (!pid) {
- execlp(unpacker, unpacker, NULL);
- die("unpack execute failed");
+ int code = run_command_v_opt(1, unpacker, RUN_GIT_CMD);
+
+ *error_code = 0;
+ switch (code) {
+ case 0:
+ return NULL;
+ case -ERR_RUN_COMMAND_FORK:
+ return "unpack fork failed";
+ case -ERR_RUN_COMMAND_EXEC:
+ return "unpack execute failed";
+ case -ERR_RUN_COMMAND_WAITPID:
+ return "waitpid failed";
+ case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
+ return "waitpid is confused";
+ case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
+ return "unpacker died of signal";
+ case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
+ return "unpacker died strangely";
+ default:
+ *error_code = -code;
+ return "unpacker exited with error code";
}
+}
- 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;
+static void report(const char *unpack_status)
+{
+ struct command *cmd;
+ packet_write(1, "unpack %s\n",
+ unpack_status ? unpack_status : "ok");
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ if (!cmd->error_string)
+ packet_write(1, "ok %s\n",
+ cmd->ref_name);
+ else
+ packet_write(1, "ng %s %s\n",
+ cmd->ref_name, cmd->error_string);
}
+ packet_flush(1);
}
int main(int argc, char **argv)
{
int i;
- const char *dir = NULL;
+ char *dir = NULL;
argv++;
for (i = 1; i < argc; i++) {
- const char *arg = *argv++;
+ char *arg = *argv++;
if (*arg == '-') {
/* Do flag handling here */
if (!dir)
usage(receive_pack_usage);
- /* 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)
- die("unable to cd to %s", dir);
- }
-
- /* If we have a ".git" directory, chdir to it */
- chdir(".git");
- setenv("GIT_DIR", ".", 1);
+ if(!enter_repo(dir, 0))
+ die("'%s': unable to chdir or not a git archive", 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();
/* EOF */
read_head_info();
if (commands) {
- unpack();
- execute_commands();
+ int code;
+ const char *unpack_status = unpack(&code);
+ if (!unpack_status)
+ execute_commands();
+ if (report_status)
+ report(unpack_status);
}
return 0;
}