fix other things related to reading scri file on repl

src/lang.zig

@@ -140,6 +140,7 @@ pub const ArgList = std.ArrayList([]const u8);
 
 pub const KeywordMap = std.StringHashMap(CommandType);
 
+/// A parser.
 pub const Lang = struct {
     allocator: *std.mem.Allocator,
     keywords: KeywordMap,

src/main.zig

@@ -25,45 +25,49 @@ fn wrapInCmdList(allocator: *std.mem.Allocator, cmd: langs.Command) !langs.Comma
 pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
     var stdout_file = try std.io.getStdOut();
     const stdout = &stdout_file.outStream().stream;
-
     const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
 
+    var file_read = try std.fs.File.openRead(scri_path);
+    const total_bytes = try file_read.getEndPos();
+
     // 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 loadargs = langs.ArgList.init(allocator);
+    // TODO load should -1 the index if its on repl
-    defer loadargs.deinit();
-    try loadargs.append(":1");
-
-    var cmds = try wrapInCmdList(allocator, langs.Command{
-        .command = .Load,
-        .args = loadargs,
-    });
 
+    var cmds = langs.CommandList.init(allocator);
     defer cmds.deinit();
 
-    // if the scri file already had commands, we add them up on the cmd list
+    var lang = langs.Lang.init(allocator);
-    var file_read = try std.fs.openReead(scri_path);
+    defer lang.deinit();
-    const total_bytes = try file_read.getEndPos();
 
     if (total_bytes > 0) {
+        // those MUST BE long lived, we can't defer them here
         var scri_existing = try allocator.alloc(u8, total_bytes);
-        defer allocator.free(scri_existing);
+        _ = try file_read.read(scri_existing);
-
-        _ = try file.read(slice);
-        file_read.close();
-
         var existing_cmds = try lang.parse(scri_existing);
-        defer existing_cmds.deinit();
 
         // copy the existing command list into the repl's command list
         var it = existing_cmds.iterator();
         while (it.next()) |existing_cmd| {
             try cmds.append(existing_cmd);
         }
+    } else {
+        // if there isn't any commands on the file, we load our default
+        // 'load :1' command
+        var loadargs = langs.ArgList.init(allocator);
+        // defer loadargs.deinit();
+        try loadargs.append(":1");
+
+        try cmds.append(langs.Command{
+            .command = .Load,
+            .args = loadargs,
+        });
     }
 
+    file_read.close();
+
     var file = try std.fs.File.openWrite(scri_path);
     defer file.close();
 
@@ -72,6 +76,7 @@ pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
 
     // since we opened the file for writing, it becomes empty, so, to ensure
     // we don't fuck up later on, we print cmds before starting the repl
+    try printer.printList(cmds, stdout);
     try printer.printList(cmds, stream);
 
     // we keep
@@ -83,9 +88,6 @@ pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
     //  - one runner that gets copied from the original on every new
     //    command the user issues
 
-    var lang = langs.Lang.init(allocator);
-    defer lang.deinit();
-
     var current: langs.Command = undefined;
 
     var runner = runners.Runner.init(allocator);