1 files changed, 64 insertions, 0 deletions
diff --git a/aoc24/build.zig b/aoc24/build.zig
new file mode 100644
index 0000000..2d5946f
--- /dev/null
+++ b/aoc24/build.zig
@@ -0,0 +1,64 @@
+const std = @import("std");
+
+// Although this function looks imperative, note that its job is to
+// declaratively construct a build graph that will be executed by an external
+// runner.
+pub fn build(b: *std.Build) void {
+    // Standard target options allows the person running `zig build` to choose
+    // what target to build for. Here we do not override the defaults, which
+    // means any target is allowed, and the default is native. Other options
+    // for restricting supported target set are available.
+    const target = b.standardTargetOptions(.{});
+
+    // Standard optimization options allow the person running `zig build` to select
+    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
+    // set a preferred release mode, allowing the user to decide how to optimize.
+    const optimize = b.standardOptimizeOption(.{});
+
+    for (1..26) |day| for ([_]usize{ 1, 2 }) |part| {
+        const name = b.fmt("day{}p{}", .{ day, part });
+        const path = b.path(b.fmt("src/{s}.zig", .{name}));
+        const exe = b.addExecutable(.{
+            .name = name,
+            .root_source_file = path,
+            .target = target,
+            .optimize = optimize,
+        });
+
+        // This declares intent for the executable to be installed into the
+        // standard location when the user invokes the "install" step (the default
+        // step when running `zig build`).
+        b.installArtifact(exe);
+
+        // This *creates* a Run step in the build graph, to be executed when another
+        // step is evaluated that depends on it. The next line below will establish
+        // such a dependency.
+        const run_cmd = b.addRunArtifact(exe);
+
+        // This allows the user to pass arguments to the application in the build
+        // command itself, like this: `zig build run -- arg1 arg2 etc`
+        if (b.args) |args| {
+            run_cmd.addArgs(args);
+        }
+
+        // This creates a build step. It will be visible in the `zig build --help` menu,
+        // and can be selected like this: `zig build run`
+        // This will evaluate the `run` step rather than the default, which is "install".
+        const run_step = b.step(name, b.fmt("Run {s}", .{name}));
+        run_step.dependOn(&run_cmd.step);
+
+        const exe_unit_tests = b.addTest(.{
+            .root_source_file = path,
+            .target = target,
+            .optimize = optimize,
+        });
+
+        const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
+
+        // Similar to creating the run step earlier, this exposes a `test` step to
+        // the `zig build --help` menu, providing a way for the user to request
+        // running the unit tests.
+        const test_step = b.step(b.fmt("test-{s}", .{name}), b.fmt("Test {s}", .{name}));
+        test_step.dependOn(&run_exe_unit_tests.step);
+    };
+}