X-Git-Url: https://git.octo.it/?p=git.git;a=blobdiff_plain;f=receive-pack.c;h=93929b5371bc0b9578ee5d3cb21c8ae6ade8cd1b;hp=9026f1bf828abdceb907054bf54ecfb7311df5e1;hb=HEAD;hpb=b30245c8e92ecaf8fb877189d7620a5a9a205120

diff --git a/receive-pack.c b/receive-pack.c
index 9026f1bf..93929b53 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -6,25 +6,38 @@
 
 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;
-	unsigned char updated;
+	const char *error_string;
 	unsigned char old_sha1[20];
 	unsigned char new_sha1[20];
-	char ref_name[0];
+	char ref_name[FLEX_ARRAY]; /* more */
 };
 
 static struct command *commands = NULL;
@@ -71,30 +84,38 @@ static int run_update_hook(const char *refname,
 	case 0:
 		return 0;
 	case -ERR_RUN_COMMAND_FORK:
-		die("hook fork failed");
+		return error("hook fork failed");
 	case -ERR_RUN_COMMAND_EXEC:
-		die("hook execute failed");
+		return error("hook execute failed");
 	case -ERR_RUN_COMMAND_WAITPID:
-		die("waitpid failed");
+		return error("waitpid failed");
 	case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
-		die("waitpid is confused");
+		return error("waitpid is confused");
 	case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
-		fprintf(stderr, "%s died of signal", update_hook);
-		return -1;
+		return error("%s died of signal", update_hook);
 	case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
-		die("%s died strangely", update_hook);
+		return error("%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)
+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);
@@ -102,16 +123,19 @@ static int update(const char *name,
 
 	strcpy(new_hex, sha1_to_hex(new_sha1));
 	old_hex = sha1_to_hex(old_sha1);
-	if (!has_sha1_file(new_sha1))
+	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, 0666);
-	if (newfd < 0)
+	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';
@@ -123,18 +147,22 @@ static int update(const char *name,
 	close(newfd);
 	if (written != 41) {
 		unlink(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);
+		cmd->error_string = "raced";
 		return error("%s changed during push", name);
 	}
 	if (run_update_hook(name, old_hex, new_hex)) {
 		unlink(lock_name);
-		return error("hook declined to update %s\n", 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 {
@@ -149,12 +177,12 @@ static void run_update_post_hook(struct command *cmd)
 {
 	struct command *cmd_p;
 	int argc;
-	char **argv;
+	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->updated)
+		if (cmd_p->error_string)
 			continue;
 		argc++;
 	}
@@ -162,14 +190,16 @@ static void run_update_post_hook(struct command *cmd)
 	argv[0] = update_post_hook;
 
 	for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
-		if (!cmd_p->updated)
+		char *p;
+		if (cmd_p->error_string)
 			continue;
-		argv[argc] = xmalloc(strlen(cmd_p->ref_name) + 1);
-		strcpy(argv[argc], cmd_p->ref_name);
+		p = xmalloc(strlen(cmd_p->ref_name) + 1);
+		strcpy(p, cmd_p->ref_name);
+		argv[argc] = p;
 		argc++;
 	}
 	argv[argc] = NULL;
-	run_command_v(argc, argv);
+	run_command_v_opt(argc, argv, RUN_COMMAND_NO_STDIO);
 }
 
 /*
@@ -181,8 +211,7 @@ static void execute_commands(void)
 	struct command *cmd = commands;
 
 	while (cmd) {
-		cmd->updated = !update(cmd->ref_name,
-				       cmd->old_sha1, cmd->new_sha1);
+		update(cmd);
 		cmd = cmd->next;
 	}
 	run_update_post_hook(commands);
@@ -195,7 +224,8 @@ 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)
@@ -207,48 +237,76 @@ static void read_head_info(void)
 		    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)
 {
-	int code = run_command(unpacker, NULL);
+	int code = run_command_v_opt(1, unpacker, RUN_GIT_CMD);
+
+	*error_code = 0;
 	switch (code) {
 	case 0:
-		return;
+		return NULL;
 	case -ERR_RUN_COMMAND_FORK:
-		die("unpack fork failed");
+		return "unpack fork failed";
 	case -ERR_RUN_COMMAND_EXEC:
-		die("unpack execute failed");
+		return "unpack execute failed";
 	case -ERR_RUN_COMMAND_WAITPID:
-		die("waitpid failed");
+		return "waitpid failed";
 	case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
-		die("waitpid is confused");
+		return "waitpid is confused";
 	case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
-		die("%s died of signal", unpacker);
+		return "unpacker died of signal";
 	case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
-		die("%s died strangely", unpacker);
+		return "unpacker died strangely";
 	default:
-		die("%s exited with error code %d", unpacker, -code);
+		*error_code = -code;
+		return "unpacker exited with error code";
 	}
 }
 
+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 */
@@ -261,18 +319,9 @@ int main(int argc, char **argv)
 	if (!dir)
 		usage(receive_pack_usage);
 
-	/* chdir to the directory. If that fails, try appending ".git" */
-	if (chdir(dir) < 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);
+	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 */
@@ -280,8 +329,12 @@ int main(int argc, char **argv)
 
 	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;
 }