From 750cc3187fa66c207d8dc9f10389f4f7ef958ad7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Fri, 3 Mar 2017 11:11:03 +0100
Subject: vis-lua: add vis:exit function

---
 vis-lua.c | 21 +++++++++++++++++++++
 vis.c     |  3 +++
 2 files changed, 24 insertions(+)

diff --git a/vis-lua.c b/vis-lua.c
index a818a6a..726f098 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -1100,6 +1100,26 @@ static int replace(lua_State *L) {
 	return 0;
 }
 
+/***
+ * Terminate editor process.
+ *
+ * Termination happens upon the next iteration of the main event loop.
+ * This means the calling Lua code will be executed further until it
+ * eventually hands over control to the editor core. The exit status
+ * of the most recent call is used.
+ *
+ * All unsaved chanes will be lost!
+ *
+ * @function exit
+ * @tparam int code the exit status returned to the operating system
+ */
+static int exit_func(lua_State *L) {
+	Vis *vis = obj_ref_check(L, 1, "vis");
+	int code = luaL_checkint(L, 2);
+	vis_exit(vis, code);
+	return 0;
+}
+
 /***
  * Currently active window.
  * @tfield Window win
@@ -1204,6 +1224,7 @@ static const struct luaL_Reg vis_lua[] = {
 	{ "insert", insert },
 	{ "replace", replace },
 	{ "action_register", action_register },
+	{ "exit", exit_func },
 	{ "__index", vis_index },
 	{ "__newindex", vis_newindex },
 	{ NULL, NULL },
diff --git a/vis.c b/vis.c
index 1595d1e..51ab041 100644
--- a/vis.c
+++ b/vis.c
@@ -529,6 +529,7 @@ Vis *vis_new(Ui *ui, VisEvent *event) {
 	Vis *vis = calloc(1, sizeof(Vis));
 	if (!vis)
 		return NULL;
+	vis->exit_status = -1;
 	vis->ui = ui;
 	vis->tabwidth = 8;
 	vis->expandtab = false;
@@ -1149,6 +1150,8 @@ bool vis_signal_handler(Vis *vis, int signum, const siginfo_t *siginfo, const vo
 int vis_run(Vis *vis, int argc, char *argv[]) {
 	if (!vis->windows)
 		return EXIT_SUCCESS;
+	if (vis->exit_status != -1)
+		return vis->exit_status;
 	vis->running = true;
 
 	vis_event_emit(vis, VIS_EVENT_START);
-- 
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