X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=receive-pack.c;h=93929b5371bc0b9578ee5d3cb21c8ae6ade8cd1b;hb=HEAD;hp=1768c875311d43a35636bab37d547c199a12b6e1;hpb=f312de018b48853d166040908b0ba2bf666e26c1;p=git.git

diff --git a/receive-pack.c b/receive-pack.c
index 1768c875..93929b53 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -1,28 +1,43 @@
 #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 */
 };
 
 static struct command *commands = NULL;
@@ -55,11 +70,52 @@ static int verify_old_ref(const char *name, char *hex_contents)
 	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);
@@ -67,12 +123,19 @@ static void update(const char *name, unsigned char *old_sha1, unsigned char *new
 
 	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, 0666);
-	if (newfd < 0)
-		die("unable to create %s (%s)", lock_name, strerror(errno));
+	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';
@@ -84,19 +147,60 @@ static void update(const char *name, unsigned char *old_sha1, unsigned char *new
 	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
@@ -107,9 +211,10 @@ static void execute_commands(void)
 	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)
@@ -119,7 +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)
@@ -131,58 +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)
 {
-	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 */
@@ -195,20 +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) {
-		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 */
@@ -216,8 +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;
 }