refactor into 'doRun' function

src/main.zig

@@ -237,6 +237,32 @@ fn doHelp() void {
     std.debug.warn("\tscritcher repl path_to_script.scri path_to_input_file.bmp\n", .{});
 }
 
+fn doRun(allocator: *std.mem.Allocator, args_it: anytype) !void {
+    var lang = langs.Lang.init(allocator);
+    defer lang.deinit();
+
+    var runner = runners.Runner.init(allocator, false);
+    defer runner.deinit();
+
+    const scri_path = try (args_it.next(allocator) orelse @panic("run: expected scri path"));
+    defer allocator.free(scri_path);
+
+    var file = try std.fs.cwd().openFile(scri_path, .{});
+    defer file.close();
+
+    // sadly, we read it all into memory. such is life
+    const total_bytes = try file.getEndPos();
+
+    var data = try allocator.alloc(u8, total_bytes);
+    defer allocator.free(data);
+    _ = try file.read(data);
+
+    var cmds = try lang.parse(data);
+    defer cmds.deinit();
+
+    try runner.runCommands(cmds, true);
+}
+
 pub fn main() !void {
     // const allocator = std.heap.page_allocator;
     var allocator_instance = std.heap.GeneralPurposeAllocator(.{}){};
@@ -245,12 +271,6 @@ pub fn main() !void {
     }
     const allocator = &allocator_instance.allocator;
 
-    var lang = langs.Lang.init(allocator);
-    defer lang.deinit();
-
-    var runner = runners.Runner.init(allocator, false);
-    defer runner.deinit();
-
     var args_it = std.process.args();
 
     // TODO print help
@@ -268,23 +288,7 @@ pub fn main() !void {
     } else if (std.mem.eql(u8, cli_command, "repl")) {
         return try doRepl(allocator, &args_it);
     } else if (std.mem.eql(u8, cli_command, "run")) {
-        const scri_path = try (args_it.next(allocator) orelse @panic("run: expected scri path"));
+        return try doRun(allocator, &args_it);
-        defer allocator.free(scri_path);
-
-        var file = try std.fs.cwd().openFile(scri_path, .{});
-        defer file.close();
-
-        // sadly, we read it all into memory. such is life
-        const total_bytes = try file.getEndPos();
-
-        var data = try allocator.alloc(u8, total_bytes);
-        defer allocator.free(data);
-        _ = try file.read(data);
-
-        var cmds = try lang.parse(data);
-        defer cmds.deinit();
-
-        try runner.runCommands(cmds, true);
     } else {
         std.debug.warn("unknown command: '{s}'\n", .{cli_command});
         return error.UnknownCommand;