launcher: fudge the interface a bit

We want to create a context before knowing the pid it will match with.

include/sway/desktop/launcher.h

@@ -23,6 +23,6 @@ void launcher_ctx_consume(struct launcher_ctx *ctx);
 
 void launcher_ctx_destroy(struct launcher_ctx *ctx);
 
-struct launcher_ctx *launcher_ctx_create(pid_t pid);
+struct launcher_ctx *launcher_ctx_create(void);
 
 #endif

sway/commands/exec_always.c

@@ -53,6 +53,7 @@ struct cmd_results *cmd_exec_process(int argc, char **argv) {
 	}
 
 	pid_t pid, child;
+	struct launcher_ctx *ctx = launcher_ctx_create();
 	// Fork process
 	if ((pid = fork()) == 0) {
 		// Fork child process again
@@ -92,8 +93,12 @@ struct cmd_results *cmd_exec_process(int argc, char **argv) {
 	waitpid(pid, NULL, 0);
 	if (child > 0) {
 		sway_log(SWAY_DEBUG, "Child process created with pid %d", child);
-		launcher_ctx_create(child);
+		if (ctx != NULL) {
+			sway_log(SWAY_DEBUG, "Recording workspace for process %d", child);
+			ctx->pid = child;
+		}
 	} else {
+		launcher_ctx_destroy(ctx);
 		return cmd_results_new(CMD_FAILURE, "Second fork() failed");
 	}
 

sway/desktop/launcher.c

@@ -175,13 +175,11 @@ static void token_handle_destroy(struct wl_listener *listener, void *data) {
 	launcher_ctx_destroy(ctx);
 }
 
-struct launcher_ctx *launcher_ctx_create(pid_t pid) {
-	sway_log(SWAY_DEBUG, "Recording workspace for process %d", pid);
-
+struct launcher_ctx *launcher_ctx_create() {
 	struct sway_seat *seat = input_manager_current_seat();
 	struct sway_workspace *ws = seat_get_focused_workspace(seat);
 	if (!ws) {
-		sway_log(SWAY_DEBUG, "Bailing out, no workspace");
+		sway_log(SWAY_DEBUG, "Failed to create launch context. No workspace.");
 		return NULL;
 	}
 
@@ -192,7 +190,6 @@ struct launcher_ctx *launcher_ctx_create(pid_t pid) {
 	ctx->name = strdup(ws->name);
 	ctx->token = token;
 	ctx->node = &ws->node;
-	ctx->pid = pid;
 
 	ctx->node_destroy.notify = ctx_handle_node_destroy;
 	wl_signal_add(&ctx->node->events.destroy, &ctx->node_destroy);