97 lines
2.6 KiB
Zig
97 lines
2.6 KiB
Zig
const std = @import("std");
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const langs = @import("lang.zig");
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const runners = @import("runner.zig");
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const printer = @import("printer.zig");
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test "scritcher" {
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_ = @import("lang.zig");
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_ = @import("runner.zig");
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}
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pub fn doRepl(allocator: *std.mem.Allocator, args_it: var) !void {
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var stdout_file = try std.io.getStdOut();
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const stdout = &stdout_file.outStream().stream;
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const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
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// the thing here is that 'load :0' would load the scri_path, since we
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// now have a 'repl' argument right before it. to counteract that, the
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// initial repl buffer contains 'load :1' instead.
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var cmds = langs.CommandList.init(allocator);
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defer cmds.deinit();
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var loadargs = langs.ArgList.init(allocator);
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defer loadargs.deinit();
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try loadargs.append(":1");
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try cmds.append(langs.Command{
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.command = .Load,
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.args = loadargs,
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});
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// TODO start a runner and keep it hot
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var lang = langs.Lang.init(allocator);
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defer lang.deinit();
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while (true) {
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try stdout.print("> ");
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var buffer = try std.Buffer.init(allocator, ""[0..]);
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var line = std.io.readLine(&buffer) catch |err| {
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if (err == error.EndOfStream) return;
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return err;
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};
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var cmds_parsed = lang.parse(line) catch |err| {
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std.debug.warn("repl: error while parsing: {}\n", err);
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continue;
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};
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try cmds.append(cmds_parsed.at(0));
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// TODO save the line to scri_file? or should we have a special `push`
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// to do so?
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// note this is debug
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try printer.printList(cmds, stdout);
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}
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}
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pub fn main() !void {
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const allocator = std.heap.direct_allocator;
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var lang = langs.Lang.init(allocator);
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defer lang.deinit();
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var runner = runners.Runner.init(allocator);
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defer runner.deinit();
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var args_it = std.process.args();
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// TODO print help
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_ = try (args_it.next(allocator) orelse @panic("expected exe name"));
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const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
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if (std.mem.eql(u8, scri_path, "repl")) {
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return try doRepl(allocator, &args_it);
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}
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var file = try std.fs.File.openRead(scri_path);
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defer file.close();
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// sadly, we read it all into memory. such is life
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const total_bytes = try file.getEndPos();
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var data = try allocator.alloc(u8, total_bytes);
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defer allocator.free(data);
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_ = try file.read(data);
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var cmds = try lang.parse(data);
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defer cmds.deinit();
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try runner.runCommands(cmds, true);
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}
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