Add a command queue to standardize and simplify commands that call other

commands and allow a command to block execution of subsequent
commands. This allows run-shell and if-shell to be synchronous which has
been much requested.

Each client has a default command queue and commands are consumed one at
a time from it. A command may suspend execution from the queue by
returning CMD_RETURN_WAIT and then resume it by calling cmd_continue() -
for example run-shell does this from the callback that is fired after
the job is freed.

When the command queue becomes empty, command clients are automatically
exited (unless attaching). A callback is also fired - this is used for
nested commands in, for example, if-shell which can block execution of
the client's cmdq until a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the
old curclient/cmdclient distinction - a cmdq is bound to one client (or
none if in the configuration file), this is a command client if
c->session is NULL otherwise an attached client.
This commit is contained in:
Nicholas Marriott
2013-03-24 09:54:10 +00:00
parent 66edb3392b
commit 20636d956d
84 changed files with 1240 additions and 1187 deletions

View File

@ -28,7 +28,7 @@
* Respawn a pane (restart the command). Kill existing if -k given.
*/
enum cmd_retval cmd_respawn_pane_exec(struct cmd *, struct cmd_ctx *);
enum cmd_retval cmd_respawn_pane_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_respawn_pane_entry = {
"respawn-pane", "respawnp",
@ -41,7 +41,7 @@ const struct cmd_entry cmd_respawn_pane_entry = {
};
enum cmd_retval
cmd_respawn_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
cmd_respawn_pane_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct winlink *wl;
@ -53,14 +53,14 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
char *cause;
u_int idx;
if ((wl = cmd_find_pane(ctx, args_get(args, 't'), &s, &wp)) == NULL)
if ((wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp)) == NULL)
return (CMD_RETURN_ERROR);
w = wl->window;
if (!args_has(self->args, 'k') && wp->fd != -1) {
if (window_pane_index(wp, &idx) != 0)
fatalx("index not found");
ctx->error(ctx, "pane still active: %s:%u.%u",
cmdq_error(cmdq, "pane still active: %s:%u.%u",
s->name, wl->idx, idx);
return (CMD_RETURN_ERROR);
}
@ -79,7 +79,7 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
else
cmd = NULL;
if (window_pane_spawn(wp, cmd, NULL, NULL, &env, s->tio, &cause) != 0) {
ctx->error(ctx, "respawn pane failed: %s", cause);
cmdq_error(cmdq, "respawn pane failed: %s", cause);
free(cause);
environ_free(&env);
return (CMD_RETURN_ERROR);