build.zig (3853B)
1 const std = @import("std"); 2 3 // Although this function looks imperative, note that its job is to 4 // declaratively construct a build graph that will be executed by an external 5 // runner. 6 pub fn build(b: *std.Build) void { 7 // Standard target options allows the person running `zig build` to choose 8 // what target to build for. Here we do not override the defaults, which 9 // means any target is allowed, and the default is native. Other options 10 // for restricting supported target set are available. 11 const target = b.standardTargetOptions(.{}); 12 13 // Standard optimization options allow the person running `zig build` to select 14 // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not 15 // set a preferred release mode, allowing the user to decide how to optimize. 16 const optimize = b.standardOptimizeOption(.{}); 17 18 const lib = b.addStaticLibrary(.{ 19 .name = "do-dyn", 20 // In this case the main source file is merely a path, however, in more 21 // complicated build scripts, this could be a generated file. 22 .root_source_file = .{ .path = "src/root.zig" }, 23 .target = target, 24 .optimize = optimize, 25 }); 26 27 // This declares intent for the library to be installed into the standard 28 // location when the user invokes the "install" step (the default step when 29 // running `zig build`). 30 b.installArtifact(lib); 31 32 const exe = b.addExecutable(.{ 33 .name = "do-dyn", 34 .root_source_file = .{ .path = "src/main.zig" }, 35 .target = target, 36 .optimize = optimize, 37 }); 38 39 // This declares intent for the executable to be installed into the 40 // standard location when the user invokes the "install" step (the default 41 // step when running `zig build`). 42 b.installArtifact(exe); 43 44 // This *creates* a Run step in the build graph, to be executed when another 45 // step is evaluated that depends on it. The next line below will establish 46 // such a dependency. 47 const run_cmd = b.addRunArtifact(exe); 48 49 // By making the run step depend on the install step, it will be run from the 50 // installation directory rather than directly from within the cache directory. 51 // This is not necessary, however, if the application depends on other installed 52 // files, this ensures they will be present and in the expected location. 53 run_cmd.step.dependOn(b.getInstallStep()); 54 55 // This allows the user to pass arguments to the application in the build 56 // command itself, like this: `zig build run -- arg1 arg2 etc` 57 if (b.args) |args| { 58 run_cmd.addArgs(args); 59 } 60 61 // This creates a build step. It will be visible in the `zig build --help` menu, 62 // and can be selected like this: `zig build run` 63 // This will evaluate the `run` step rather than the default, which is "install". 64 const run_step = b.step("run", "Run the app"); 65 run_step.dependOn(&run_cmd.step); 66 67 // Creates a step for unit testing. This only builds the test executable 68 // but does not run it. 69 const lib_unit_tests = b.addTest(.{ 70 .root_source_file = .{ .path = "src/root.zig" }, 71 .target = target, 72 .optimize = optimize, 73 }); 74 75 const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests); 76 77 const exe_unit_tests = b.addTest(.{ 78 .root_source_file = .{ .path = "src/main.zig" }, 79 .target = target, 80 .optimize = optimize, 81 }); 82 83 const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests); 84 85 // Similar to creating the run step earlier, this exposes a `test` step to 86 // the `zig build --help` menu, providing a way for the user to request 87 // running the unit tests. 88 const test_step = b.step("test", "Run unit tests"); 89 test_step.dependOn(&run_lib_unit_tests.step); 90 test_step.dependOn(&run_exe_unit_tests.step); 91 }