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build: exact per-binary imports — the pre-wired default set is gone

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Every binary's build.zig now names precisely the modules its source
imports (derived by scanning each artifact's sources, transitively
through same-directory files), and its zon carries only the domains
those come from — kernel stays implicit (the root shim + link script
live there). build-support's userBinary resolves each name through one
module-to-domain table (module_homes); Domains/domains()/defaultImports
and the raw recipe entry point are deleted. An undeclared @import is a
compile error (verified: injecting @import("xkeyboard-config") into
logger fails with 'no module named ... available within module
program'), and e.g. xkeyboard-config now appears in exactly two
manifests — the two keyboard drivers. Availability never bloated the
emitted binaries (Zig compiles only what a program imports); this makes
the declared interfaces honest. Production and -Dtest-case manifests
byte-identical; all build variants and standalone package builds
green.
This commit is contained in:
Daniel Samson
2026-07-30 06:42:31 +01:00
parent c621b649f6
commit 4476208361
60 changed files with 401 additions and 450 deletions
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system/services/display/build.zig
+7 -9
View File
@@ -1,22 +1,20 @@
//! The display service 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.
//! The display service as a binary package (docs/build-packages-plan.md):
//! this file names the binary and EXACTLY the modules its source imports —
//! the shared recipe and the module-to-domain map live in build-support.
const std = @import("std");
const build_support = @import("build-support");
pub fn build(b: *std.Build) void {
const protocol = b.dependency("protocol", .{});
const exe = build_support.userBinary(b, .{
.name = "display",
.root_source_file = b.path("display.zig"),
.domains = build_support.domains(b),
.imports = &.{
"display", "display-protocol", "driver", "input", "ipc", "logging", "memory",
"scanout-protocol", "service", "thread", "time",
},
.threaded = true, // real atomics/TLS (docs/threading.md)
});
build_support.programModule(exe).addImport("display-protocol", protocol.module("display-protocol"));
build_support.programModule(exe).addImport("scanout-protocol", protocol.module("scanout-protocol"));
b.installArtifact(exe);
// Standalone `zig build test`; the root aggregate depends on this step.