zig setup stuff

src/main.zig

@@ -0,0 +1,27 @@
+const std = @import("std");
+const aoc25 = @import("aoc25");
+
+pub fn main() !void {
+    // Prints to stderr, ignoring potential errors.
+    std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
+    try aoc25.bufferedPrint();
+}
+
+test "simple test" {
+    const gpa = std.testing.allocator;
+    var list: std.ArrayList(i32) = .empty;
+    defer list.deinit(gpa); // Try commenting this out and see if zig detects the memory leak!
+    try list.append(gpa, 42);
+    try std.testing.expectEqual(@as(i32, 42), list.pop());
+}
+
+test "fuzz example" {
+    const Context = struct {
+        fn testOne(context: @This(), input: []const u8) anyerror!void {
+            _ = context;
+            // Try passing `--fuzz` to `zig build test` and see if it manages to fail this test case!
+            try std.testing.expect(!std.mem.eql(u8, "canyoufindme", input));
+        }
+    };
+    try std.testing.fuzz(Context{}, Context.testOne, .{});
+}

src/root.zig

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+//! By convention, root.zig is the root source file when making a library.
+const std = @import("std");
+
+pub fn bufferedPrint() !void {
+    // Stdout is for the actual output of your application, for example if you
+    // are implementing gzip, then only the compressed bytes should be sent to
+    // stdout, not any debugging messages.
+    var stdout_buffer: [1024]u8 = undefined;
+    var stdout_writer = std.fs.File.stdout().writer(&stdout_buffer);
+    const stdout = &stdout_writer.interface;
+
+    try stdout.print("Run `zig build test` to run the tests.\n", .{});
+
+    try stdout.flush(); // Don't forget to flush!
+}
+
+pub fn add(a: i32, b: i32) i32 {
+    return a + b;
+}
+
+test "basic add functionality" {
+    try std.testing.expect(add(3, 7) == 10);
+}