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const std = @import("std");
// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) void {
// 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 generate_main = b.addExecutable(.{
.name = "generate_main",
.root_source_file = b.path("tools/generate_main.zig"),
.target = b.host,
});
const download_input = b.addExecutable(.{
.name = "download_input",
.root_source_file = b.path("tools/download_input.zig"),
.target = b.host,
});
for (1..26) |day| {
const run_download_input = b.addRunArtifact(download_input);
run_download_input.addArg(b.fmt("{}", .{day}));
const input_path = run_download_input.addOutputFileArg(b.fmt("{}.txt", .{day}));
const path = b.path(b.fmt("src/day{}.zig", .{day}));
for ([_]usize{ 1, 2 }) |part| {
const name = b.fmt("day{}p{}", .{ day, part });
const run_generate_main = b.addRunArtifact(generate_main);
run_generate_main.addArg(b.fmt("{}", .{part}));
const main_path = run_generate_main.addOutputFileArg(b.fmt("{s}_main.zig", .{name}));
const exe = b.addExecutable(.{
.name = b.fmt("{s}", .{name}),
.root_source_file = main_path,
.target = target,
.optimize = optimize,
});
exe.root_module.addAnonymousImport("solution", .{
.root_source_file = path,
.target = target,
.optimize = optimize,
});
exe.root_module.addAnonymousImport("input", .{
.root_source_file = input_path,
.target = target,
.optimize = optimize,
});
// This declares intent for the executable to be installed into the
// standard location when the user invokes the "install" step (the default
// step when running `zig build`).
b.installArtifact(exe);
// This *creates* a Run step in the build graph, to be executed when another
// step is evaluated that depends on it. The next line below will establish
// such a dependency.
const run_cmd = b.addRunArtifact(exe);
// This allows the user to pass arguments to the application in the build
// command itself, like this: `zig build run -- arg1 arg2 etc`
if (b.args) |args| {
run_cmd.addArgs(args);
}
// This creates a build step. It will be visible in the `zig build --help` menu,
// and can be selected like this: `zig build run`
// This will evaluate the `run` step rather than the default, which is "install".
const run_step = b.step(name, b.fmt("Run {s}", .{name}));
run_step.dependOn(&run_cmd.step);
const exe_unit_tests = b.addTest(.{
.root_source_file = path,
.target = target,
.optimize = optimize,
.filters = &.{b.fmt("part{}", .{part})},
});
const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
// Similar to creating the run step earlier, this exposes a `test` step to
// the `zig build --help` menu, providing a way for the user to request
// running the unit tests.
const test_step = b.step(b.fmt("{s}-test", .{name}), b.fmt("Test {s}", .{name}));
test_step.dependOn(&run_exe_unit_tests.step);
}
}
}
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