add doRepl func

src/main.zig

@@ -7,6 +7,29 @@ test "scritcher" {
     _ = @import("runner.zig");
 }
 
+pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
+    const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
+
+    // the thing here is that 'load :0' would load the scri_path, since we
+    // now have a 'repl' argument right before it. to counteract that, the
+    // initial repl buffer contains 'load :1' instead.
+
+    var buf = langs.CommandList.init(allocator);
+    defer buf.deinit();
+
+    var loadargs = langs.ArgList.init(allocator);
+    defer loadargs.deinit();
+
+    try loadargs.append(":1");
+
+    try buf.append(langs.Command{
+        .command = .Load,
+        .args = loadargs,
+    });
+
+    // TODO the rest
+}
+
 pub fn main() !void {
     const allocator = std.heap.direct_allocator;
 
@@ -18,9 +41,15 @@ pub fn main() !void {
 
     var args_it = std.process.args();
 
+    // TODO print help
+
     _ = try (args_it.next(allocator) orelse @panic("expected exe name"));
     const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
 
+    if (std.mem.eql(u8, scri_path, "repl")) {
+        return try doRepl(allocator, &args_it);
+    }
+
     var file = try std.fs.File.openRead(scri_path);
     defer file.close();