runner: ignore one arg when its in repl

closes #8

src/main.zig

@@ -54,11 +54,9 @@ pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
         }
     } else {
         // if there isn't any commands on the file, we load our default
-        // 'load :1' command
-
-        // TODO load should +1 the index if its on repl
+        // 'load :0' command
         var loadargs = langs.ArgList.init(allocator);
-        try loadargs.append(":1");
+        try loadargs.append(":0");
 
         try cmds.append(langs.Command{
             .command = .Load,
@@ -90,7 +88,7 @@ pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
 
     var current: langs.Command = undefined;
 
-    var runner = runners.Runner.init(allocator);
+    var runner = runners.Runner.init(allocator, true);
     defer runner.deinit();
 
     // run the load command
@@ -164,7 +162,7 @@ pub fn main() !void {
     var lang = langs.Lang.init(allocator);
     defer lang.deinit();
 
-    var runner = runners.Runner.init(allocator);
+    var runner = runners.Runner.init(allocator, false);
     defer runner.deinit();
 
     var args_it = std.process.args();

src/runner.zig

@@ -19,11 +19,17 @@ pub const RunError = error{
 
 pub const Runner = struct {
     allocator: *std.mem.Allocator,
+
+    /// The currently opened image in the runner
     image: ?*Image = null,
 
-    pub fn init(allocator: *std.mem.Allocator) Runner {
+    /// If the runner is in REPL mode
+    repl: bool = false,
+
+    pub fn init(allocator: *std.mem.Allocator, repl: bool) Runner {
         return Runner{
             .allocator = allocator,
+            .repl = repl,
         };
     }
 
@@ -41,7 +47,11 @@ pub const Runner = struct {
     fn resolveArg(self: *Runner, load_path: []const u8) ![]const u8 {
         if (load_path[0] == ':') {
             // parse the index from 1 to end
-            const index = try std.fmt.parseInt(usize, load_path[1..], 10);
+            var index = try std.fmt.parseInt(usize, load_path[1..], 10);
+
+            // don't care about the 'repl' being prepended when we're in repl
+            if (self.repl) index += 1;
+
             var args_it = std.process.args();
             _ = args_it.skip();