add runqs command

src/lang.zig

@@ -12,6 +12,7 @@ pub const CommandType = enum {
     Noop,
     Load,
     Quicksave,
+    RunQS,
 
     Amp,
     RFlanger,
@@ -125,6 +126,7 @@ pub const Lang = struct {
         _ = try self.keywords.put("noop", .Noop);
         _ = try self.keywords.put("load", .Load);
         _ = try self.keywords.put("quicksave", .Quicksave);
+        _ = try self.keywords.put("runqs", .RunQS);
 
         _ = try self.keywords.put("amp", .Amp);
         _ = try self.keywords.put("rflanger", .RFlanger);

src/runner.zig

@@ -91,7 +91,7 @@ pub const Runner = struct {
         }
     }
 
-    fn quicksaveCmd(self: *Runner) !void {
+    fn makeGlitchedPath(self: *Runner) ![]const u8 {
         // we want to transform basename, if it is "x.bmp" to "x_gN.bmp", where
         // N is the maximum non-used integer.
         var image = try self.getImage();
@@ -149,9 +149,30 @@ pub const Runner = struct {
             extension,
         );
 
+        return out_path;
+    }
+
+    fn quicksaveCmd(self: *Runner) !void {
+        var image = try self.getImage();
+        const out_path = try self.makeGlitchedPath();
         try image.saveTo(out_path);
     }
 
+    fn runQSCmd(self: *Runner, program: []const u8) !void {
+        var image = try self.getImage();
+        const out_path = try self.makeGlitchedPath();
+        try image.saveTo(out_path);
+
+        var proc = try std.ChildProcess.init(
+            [_][]const u8{ program, out_path },
+            self.allocator,
+        );
+        defer proc.deinit();
+
+        std.debug.warn("running '{} {}'", program, out_path);
+        _ = try proc.spawnAndWait();
+    }
+
     /// Run the http://lv2plug.in/plugins/eg-amp plugin over the file.
     fn ampCmd(self: *Runner, pos: Position, params: ParamList) !void {
         var image = try self.getImage();
@@ -221,6 +242,7 @@ pub const Runner = struct {
                 break :blk;
             },
             .Quicksave => try self.quicksaveCmd(),
+            .RunQS => try self.runQSCmd(cmd.args.at(0)),
 
             .Amp => blk: {
                 const pos = try cmd.consumePosition();