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const std = @import("std");

pub fn build(b: *std.build.Builder) 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 release options allow the person running `zig build` to select
    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
    const mode = b.standardReleaseOptions();

    const exe = b.addExecutable("zigfunge98", "src/main.zig");
    exe.setTarget(target);
    exe.setBuildMode(mode);
    exe.install();

    const run_cmd = exe.run();
    run_cmd.step.dependOn(b.getInstallStep());
    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    const tui = b.addExecutable("zigfunge98-tui", "src/tui.zig");
    tui.addPackagePath("spoon", "lib/spoon/import.zig");
    tui.setTarget(target);
    tui.setBuildMode(mode);
    tui.install();

    const coverage = b.option(bool, "test-coverage", "Generate test coverage") orelse false;

    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);

    const exe_tests = b.addTest("src/main.zig");
    exe_tests.setTarget(target);
    exe_tests.setBuildMode(mode);

    // Code coverage with kcov, we need an allocator for the setup
    var general_purpose_allocator = std.heap.GeneralPurposeAllocator(.{}){};
    defer _ = general_purpose_allocator.deinit();
    const gpa = general_purpose_allocator.allocator();
    // We want to exclude the $HOME/.zig path
    const home = std.process.getEnvVarOwned(gpa, "HOME") catch "";
    defer gpa.free(home);
    const exclude = std.fmt.allocPrint(gpa, "--exclude-path={s}/.zig/", .{home}) catch "";
    defer gpa.free(exclude);
    if (coverage) {
        exe_tests.setExecCmd(&[_]?[]const u8{
            "kcov",
            exclude,
            //"--path-strip-level=3", // any kcov flags can be specified here
            "kcov-output", // output dir for kcov
            null, // to get zig to use the --test-cmd-bin flag
        });
    }

    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&exe_tests.step);
}