universal-lambda-zig/build.zig

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const std = @import("std");
const test_targets = [_]std.zig.CrossTarget{
.{}, // native
.{
.cpu_arch = .x86_64,
.os_tag = .linux,
},
.{
.cpu_arch = .aarch64,
.os_tag = .linux,
},
.{
.cpu_arch = .arm,
.os_tag = .linux,
},
// Windows needs to avoid std.os.getenv - we'll wait until this is needed
// .{
// .cpu_arch = .x86_64,
// .os_tag = .windows,
// },
// I don't have a good way to test these
// .{
// .cpu_arch = .aarch64,
// .os_tag = .macos,
// },
// .{
// .cpu_arch = .x86_64,
// .os_tag = .macos,
// },
.{
.cpu_arch = .wasm32,
.os_tag = .wasi,
},
};
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// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
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pub fn build(b: *std.Build) !void {
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// 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(.{});
const lib = b.addStaticLibrary(.{
.name = "universal-lambda-zig",
// In this case the main source file is merely a path, however, in more
// complicated build scripts, this could be a generated file.
.root_source_file = .{ .path = "src/universal_lambda_build.zig" },
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.target = target,
.optimize = optimize,
});
const universal_lambda = @import("src/universal_lambda_build.zig");
universal_lambda.module_root = b.build_root.path;
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// re-expose flexilib-interface and aws_lambda modules downstream
const flexilib_dep = b.dependency("flexilib", .{
.target = target,
.optimize = optimize,
});
const flexilib_module = flexilib_dep.module("flexilib-interface");
_ = b.addModule("flexilib-interface", .{
.root_source_file = flexilib_module.root_source_file,
.target = target,
.optimize = optimize,
});
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const aws_lambda_dep = b.dependency("lambda-zig", .{
.target = target,
.optimize = optimize,
});
const aws_lambda_module = aws_lambda_dep.module("lambda_runtime");
_ = b.addModule("aws_lambda_runtime", .{
.root_source_file = aws_lambda_module.root_source_file,
.target = target,
.optimize = optimize,
});
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// Expose our own modules downstream
_ = b.addModule("universal_lambda_interface", .{
.root_source_file = b.path("src/interface.zig"),
.target = target,
.optimize = optimize,
});
_ = b.addModule("universal_lambda_handler", .{
.root_source_file = b.path("src/universal_lambda.zig"),
.target = target,
.optimize = optimize,
});
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universal_lambda.addImports(b, lib, null);
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// This declares intent for the library to be installed into the standard
// location when the user invokes the "install" step (the default step when
// running `zig build`).
b.installArtifact(lib);
const test_step = b.step("test", "Run tests (all architectures)");
const native_test_step = b.step("test-native", "Run tests (native only)");
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for (test_targets) |t| {
// Creates steps for unit testing. This only builds the test executable
// but does not run it.
const exe_tests = b.addTest(.{
.name = "test: as executable",
.root_source_file = .{ .path = "src/test.zig" },
.target = b.resolveTargetQuery(t),
.optimize = optimize,
});
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universal_lambda.addImports(b, exe_tests, null);
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var run_exe_tests = b.addRunArtifact(exe_tests);
run_exe_tests.skip_foreign_checks = true;
test_step.dependOn(&run_exe_tests.step);
if (t.cpu_arch == null) native_test_step.dependOn(&run_exe_tests.step);
// Universal lambda can end up as an exe or a lib. When it is a library,
// we end up changing the root source file away from downstream so we can
// control exports and such. This is just flexilib for now, but we could
// end up in a situation where we need to create an array of libraries
// with various roots that all meet the rest of the build DAG at test_step
// in the future. Scaleway, for instance, is another system that works
// via shared library
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const lib_tests = b.addTest(.{
.name = "test: as library",
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.root_source_file = .{ .path = "src/flexilib.zig" },
.target = b.resolveTargetQuery(t),
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.optimize = optimize,
});
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universal_lambda.addImports(b, lib_tests, null);
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var run_lib_tests = b.addRunArtifact(lib_tests);
run_lib_tests.skip_foreign_checks = true;
test_step.dependOn(&run_lib_tests.step);
if (t.cpu_arch == null) native_test_step.dependOn(&run_lib_tests.step);
}
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}
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pub fn configureBuild(b: *std.Build, cs: *std.Build.Step.Compile, universal_lambda_zig_dep: *std.Build.Dependency) !void {
try @import("src/universal_lambda_build.zig").configureBuild(b, cs, universal_lambda_zig_dep);
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}
pub fn addImports(b: *std.Build, cs: *std.Build.Step.Compile, universal_lambda_zig_dep: *std.Build.Dependency) void {
// The underlying call has an optional dependency here, but we do not.
// Downstream must provide the dependency, which will ensure that the
// modules we have exposed above do, in fact, get exposed
return @import("src/universal_lambda_build.zig").addImports(b, cs, universal_lambda_zig_dep);
}