move cross target testing into zig build test

.gitea/workflows/build.yaml

@@ -19,15 +19,16 @@ jobs:
       #
       # However, arm64/linux isn't quite fully tier 1 yet, so this is more of a
       # TODO: https://github.com/ziglang/zig/issues/2443
-      - run: wget -q https://ziglang.org/download/${ZIG_VERSION}/zig-linux-${ARCH}-${ZIG_VERSION}.tar.xz
-      - run: tar x -C /usr/local -f zig-linux-${ARCH}-${ZIG_VERSION}.tar.xz
-      - run: ln -s /usr/local/zig-linux-${ARCH}-${ZIG_VERSION}/zig /usr/local/bin/zig
-      - run: curl https://wasmtime.dev/install.sh -sSf | bash
-      - run: zig build test
-      - run: zig build test -Dtarget=arm-linux # we want to know we can build for 32 bit 
-      # - run: PATH=${HOME}/.wasmtime/bin:${PATH} zig build test -Dtarget=wasm32-wasi -fwasmtime # downstream needs this for CF workers
-      - run: zig build test -Dtarget=wasm32-wasi # downstream needs this for CF workers
-      # - run: zig build test -Dx86_64-windows # windows needs changes for env vars
+      - name: Install Zig
+        run: |
+          wget -q https://ziglang.org/download/${ZIG_VERSION}/zig-linux-${ARCH}-${ZIG_VERSION}.tar.xz
+          tar x -C /usr/local -f zig-linux-${ARCH}-${ZIG_VERSION}.tar.xz
+          ln -s /usr/local/zig-linux-${ARCH}-${ZIG_VERSION}/zig /usr/local/bin/zig
+      - name: Install wasmtime
+        run: curl https://wasmtime.dev/install.sh -sSf | bash
+      - name: Run tests
+        run: zig build test
+      # - run: PATH=${HOME}/.wasmtime/bin:${PATH} zig build test -fwasmtime # downstream needs this for CF workers
       - name: Notify
         uses: https://git.lerch.org/lobo/action-notify-ntfy@v2
         if: always()

build.zig

@@ -1,5 +1,38 @@
 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,
+    },
+};
 // Although this function looks imperative, note that its job is to
 // declaratively construct a build graph that will be executed by an external
 // runner.
@@ -32,40 +65,43 @@ pub fn build(b: *std.Build) !void {
     // running `zig build`).
     b.installArtifact(lib);
 
-    // Creates steps for unit testing. This only builds the test executable
-    // but does not run it.
-    const exe_tests = b.addTest(.{
-        .root_source_file = .{ .path = "src/test.zig" },
-        .target = target,
-        .optimize = optimize,
-    });
-    _ = try universal_lambda.addModules(b, exe_tests);
-
-    var run_exe_tests = b.addRunArtifact(exe_tests);
-    run_exe_tests.skip_foreign_checks = true;
-
-    // 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
-    const lib_tests = b.addTest(.{
-        .root_source_file = .{ .path = "src/flexilib.zig" },
-        .target = target,
-        .optimize = optimize,
-    });
-    _ = try universal_lambda.addModules(b, lib_tests);
-
-    var run_lib_tests = b.addRunArtifact(lib_tests);
-    run_lib_tests.skip_foreign_checks = true;
-    // This creates a build step. It will be visible in the `zig build --help` menu,
-    // and can be selected like this: `zig build test`
-    // This will evaluate the `test` step rather than the default, which is "install".
     const test_step = b.step("test", "Run library tests");
-    test_step.dependOn(&run_exe_tests.step);
-    test_step.dependOn(&run_lib_tests.step);
+
+    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(.{
+            .root_source_file = .{ .path = "src/test.zig" },
+            .target = t,
+            .optimize = optimize,
+        });
+        _ = try universal_lambda.addModules(b, exe_tests);
+
+        var run_exe_tests = b.addRunArtifact(exe_tests);
+        run_exe_tests.skip_foreign_checks = true;
+        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
+        // const lib_tests = b.addTest(.{
+        //     .root_source_file = .{ .path = "src/flexilib.zig" },
+        //     .target = t,
+        //     .optimize = optimize,
+        // });
+        // _ = try universal_lambda.addModules(b, lib_tests);
+        //
+        // var run_lib_tests = b.addRunArtifact(lib_tests);
+        // run_lib_tests.skip_foreign_checks = true;
+        // // This creates a build step. It will be visible in the `zig build --help` menu,
+        // // and can be selected like this: `zig build test`
+        // // This will evaluate the `test` step rather than the default, which is "install".
+        // test_step.dependOn(&run_lib_tests.step);
+    }
 }
 
 pub fn configureBuild(b: *std.Build, cs: *std.Build.Step.Compile) !void {