Implement configuration HEAD main

2 files changed, 43 insertions, 2 deletions

diff --git a/src/Config.zig b/src/Config.zig
new file mode 100644
index 0000000..51fc885
--- /dev/null
+++ b/src/Config.zig
@@ -0,0 +1,34 @@
+// Configuration
+// SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+const Allocator = std.mem.Allocator;
+const cwd = std.fs.cwd;
+const maxInt = std.math.maxInt;
+const joinPath = std.fs.path.joinZ;
+const std = @import("std");
+
+const folders = @import("known-folders");
+const zsanett = @import("zsanett");
+
+const Config = @This();
+tab_width: u8 = 8,
+
+pub fn parse(allocator: Allocator, env: *zsanett.Table) !Config {
+    if (try folders.getPath(allocator, .local_configuration)) |local_conf| {
+        defer allocator.free(local_conf);
+        const path = try joinPath(allocator, &.{
+            local_conf,
+            "kay",
+            "config.janet"
+        });
+        defer allocator.free(path);
+        if (cwd().readFileAlloc(allocator, path, maxInt(u32))) |content| {
+            defer allocator.free(content);
+            return try zsanett.eval(Config, env, content, path.ptr);
+        } else |err| switch (err) {
+            error.FileNotFound => return .{},
+            else => return err,
+        }
+    } else return .{};
+}
diff --git a/src/main.zig b/src/main.zig
index cf99cad..5e91719 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -17,7 +17,9 @@ const Unicode = vaxis.Unicode;
 const Winsize = vaxis.Winsize;
 const gwidth = vaxis.gwidth.gwidth;
 const vaxis = @import("vaxis");
+const zsanett = @import("zsanett");
 
+const Config = @import("Config.zig");
 const Token = @import("Token.zig");
 const languages = @import("languages");
 
@@ -34,6 +36,11 @@ pub fn main() !void {
         .ReleaseFast, .ReleaseSmall => smp_allocator,
     };
 
+    zsanett.init();
+    defer zsanett.deinit();
+    const janet_env = zsanett.coreEnv(null);
+    const config = try Config.parse(allocator, janet_env);
+
     var tty = try Tty.init();
     defer tty.deinit();
     var vx = try vaxis.init(allocator, .{});
@@ -77,10 +84,10 @@ pub fn main() !void {
                     continue;
                 }
                 const width: u8 = if (eql(u8, bytes, "\t"))
-                    8 // TODO: make configurable
+                    config.tab_width
                 else
                     @intCast(gwidth(bytes, vx.caps.unicode,
-                             &vx.unicode.width_data));
+                                    &vx.unicode.width_data));
                 defer col += width;
                 window.writeCell(col, row, .{
                     .char = .{ .grapheme = bytes, .width = width },