build: phase 2 wave A — services build as packages

init, fat, display, display-demo, device-manager, input, logger, and the two discovery fillers (acpi, fdt — each exporting an artifact named "discovery"; the root -Ddiscovery picks which ships) convert to binary packages on the pci-bus template. init's serial heartbeat flag rides the dependency options (the root forwards its -Dserial). fat's and display's unit tests move into their packages and the root aggregate delegates to them. Boot-image file list unchanged.
2026-07-30 04:02:49 +01:00
parent 902e4a0a9e
commit 3b23b11b0e
56 changed files with 1064 additions and 60 deletions
@@ -0,0 +1,49 @@
+//! The ps2-bus driver as a binary package (docs/build-packages-plan.md,
+//! phase 2): this file names only what is specific to this binary — the shared
+//! recipe and the default-import wiring live in build-support. The root build
+//! consumes the artifact(s) for the boot image.
+
+const std = @import("std");
+const build_support = @import("build-support");
+
+pub fn build(b: *std.Build) void {
+    const protocol = b.dependency("protocol", .{});
+
+    const ps2_bus_exe = build_support.userBinary(b, .{
+        .name = "ps2-bus",
+        .root_source_file = b.path("ps2-bus.zig"),
+        .domains = build_support.domains(b),
+    });
+    b.installArtifact(ps2_bus_exe);
+
+    const ps2_keyboard_exe = build_support.userBinary(b, .{
+        .name = "ps2-keyboard",
+        .root_source_file = b.path("keyboard.zig"),
+        .domains = build_support.domains(b),
+    });
+    build_support.programModule(ps2_keyboard_exe).addImport("input-protocol", protocol.module("input-protocol"));
+    b.installArtifact(ps2_keyboard_exe);
+
+    const ps2_mouse_exe = build_support.userBinary(b, .{
+        .name = "ps2-mouse",
+        .root_source_file = b.path("mouse.zig"),
+        .domains = build_support.domains(b),
+    });
+    build_support.programModule(ps2_mouse_exe).addImport("input-protocol", protocol.module("input-protocol"));
+    b.installArtifact(ps2_mouse_exe);
+
+    // Standalone `zig build test`; the root aggregate depends on this step.
+    const test_step = b.step("test", "Run the ps2-bus unit tests");
+    for ([_][]const u8{
+        "scancode.zig", // set-2 decode + keyboard state machine
+        "mouse-packet.zig", // 3-byte mouse packet assembly
+    }) |test_root| {
+        const unit_tests = b.addTest(.{
+            .root_module = b.createModule(.{
+                .root_source_file = b.path(test_root),
+                .target = b.resolveTargetQuery(.{}),
+            }),
+        });
+        test_step.dependOn(&b.addRunArtifact(unit_tests).step);
+    }
+}