Documentation: add git-mergetool to the command list.

diff --git a/receive-pack.c b/receive-pack.c
index 675c88f4924086667deddc945011f6037ee8a8eb..7cf58782e38b0d52c104921d938163f2ba2c343c 100644 (file)
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -67,47 +67,11 @@ struct command {
 
 static struct command *commands;
 
-static const char update_hook[] = "hooks/update";
 static const char pre_receive_hook[] = "hooks/pre-receive";
 static const char post_receive_hook[] = "hooks/post-receive";
 
-static int run_hook(const char *hook_name,
-       struct command *first_cmd,
-       int single)
+static int hook_status(int code, const char *hook_name)
 {
-       struct command *cmd;
-       int argc, code;
-       const char **argv;
-
-       for (argc = 0, cmd = first_cmd; cmd; cmd = cmd->next) {
-               if (!cmd->error_string)
-                       argc += 3;
-               if (single)
-                       break;
-       }
-
-       if (!argc || access(hook_name, X_OK) < 0)
-               return 0;
-
-       argv = xmalloc(sizeof(*argv) * (2 + argc));
-       argv[0] = hook_name;
-       for (argc = 1, cmd = first_cmd; cmd; cmd = cmd->next) {
-               if (!cmd->error_string) {
-                       argv[argc++] = xstrdup(cmd->ref_name);
-                       argv[argc++] = xstrdup(sha1_to_hex(cmd->old_sha1));
-                       argv[argc++] = xstrdup(sha1_to_hex(cmd->new_sha1));
-               }
-               if (single)
-                       break;
-       }
-       argv[argc] = NULL;
-
-       code = run_command_v_opt(argv,
-               RUN_COMMAND_NO_STDIN | RUN_COMMAND_STDOUT_TO_STDERR);
-       while (--argc > 0)
-               free((char*)argv[argc]);
-       free(argv);
-
        switch (code) {
        case 0:
                return 0;
@@ -115,6 +79,8 @@ static int run_hook(const char *hook_name,
                return error("hook fork failed");
        case -ERR_RUN_COMMAND_EXEC:
                return error("hook execute failed");
+       case -ERR_RUN_COMMAND_PIPE:
+               return error("hook pipe failed");
        case -ERR_RUN_COMMAND_WAITPID:
                return error("waitpid failed");
        case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
@@ -129,6 +95,69 @@ static int run_hook(const char *hook_name,
        }
 }
 
+static int run_hook(const char *hook_name)
+{
+       static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
+       struct command *cmd;
+       struct child_process proc;
+       const char *argv[2];
+       int have_input = 0, code;
+
+       for (cmd = commands; !have_input && cmd; cmd = cmd->next) {
+               if (!cmd->error_string)
+                       have_input = 1;
+       }
+
+       if (!have_input || access(hook_name, X_OK) < 0)
+               return 0;
+
+       argv[0] = hook_name;
+       argv[1] = NULL;
+
+       memset(&proc, 0, sizeof(proc));
+       proc.argv = argv;
+       proc.in = -1;
+       proc.stdout_to_stderr = 1;
+
+       code = start_command(&proc);
+       if (code)
+               return hook_status(code, hook_name);
+       for (cmd = commands; cmd; cmd = cmd->next) {
+               if (!cmd->error_string) {
+                       size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n",
+                               sha1_to_hex(cmd->old_sha1),
+                               sha1_to_hex(cmd->new_sha1),
+                               cmd->ref_name);
+                       if (write_in_full(proc.in, buf, n) != n)
+                               break;
+               }
+       }
+       return hook_status(finish_command(&proc), hook_name);
+}
+
+static int run_update_hook(struct command *cmd)
+{
+       static const char update_hook[] = "hooks/update";
+       struct child_process proc;
+       const char *argv[5];
+
+       if (access(update_hook, X_OK) < 0)
+               return 0;
+
+       argv[0] = update_hook;
+       argv[1] = cmd->ref_name;
+       argv[2] = sha1_to_hex(cmd->old_sha1);
+       argv[3] = sha1_to_hex(cmd->new_sha1);
+       argv[4] = NULL;
+
+       memset(&proc, 0, sizeof(proc));
+       proc.argv = argv;
+       proc.no_stdin = 1;
+       proc.stdout_to_stderr = 1;
+
+       return hook_status(run_command(&proc), update_hook);
+}
+
 static const char *update(struct command *cmd)
 {
        const char *name = cmd->ref_name;
@@ -165,7 +194,7 @@ static const char *update(struct command *cmd)
                        return "non-fast forward";
                }
        }
-       if (run_hook(update_hook, cmd, 1)) {
+       if (run_update_hook(cmd)) {
                error("hook declined to update %s", name);
                return "hook declined";
        }
@@ -238,7 +267,7 @@ static void execute_commands(const char *unpacker_error)
                return;
        }
 
-       if (run_hook(pre_receive_hook, commands, 0)) {
+       if (run_hook(pre_receive_hook)) {
                while (cmd) {
                        cmd->error_string = "pre-receive hook declined";
                        cmd = cmd->next;
@@ -493,7 +522,7 @@ int main(int argc, char **argv)
                        unlink(pack_lockfile);
                if (report_status)
                        report(unpack_status);
-               run_hook(post_receive_hook, commands, 0);
+               run_hook(post_receive_hook);
                run_update_post_hook(commands);
        }
        return 0;