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// Build recipe
// Copyright (C) 2021-2023  Nguyễn Gia Phong
//
// This file is part of zeal.
//
// Zeal is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Zeal is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with zeal.  If not, see <https://www.gnu.org/licenses/>.

const std = @import("std");
const Build = std.Build;
const Compile = Build.Step.Compile;
const CrossTarget = std.zig.CrossTarget;
const Module = Build.Module;
const OptimizeMode = std.builtin.OptimizeMode;

/// Link given library, executable, or object with shared libraries.
pub fn link(compile: *Compile) void {
    compile.linkSystemLibrary("openal");
    compile.linkSystemLibrary("sndfile");
    compile.linkSystemLibrary("c");
}

fn addExampleStep(comptime name: []const u8, description: []const u8,
                  b: *Build, module: *Module,
                  target: CrossTarget, optimize: OptimizeMode) void {
    const bin = b.addExecutable(.{
        .name = name,
        .root_source_file = .{ .path = "examples/" ++ name ++ ".zig" },
        .target = target,
        .optimize = optimize,
    });
    bin.addModule("zeal", module);
    link(bin);

    const cmd = b.addRunArtifact(bin);
    cmd.step.dependOn(b.getInstallStep());
    if (b.args) |args|
        cmd.addArgs(args);
    b.step(name, description).dependOn(&cmd.step);
}

pub fn build(b: *Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});
    const lib = b.addStaticLibrary(.{
        .name = "zeal",
        .root_source_file = .{ .path = "src/zeal.zig" },
        .target = target,
        .optimize = optimize,
    });
    link(lib);

    var main_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/zeal.zig" },
        .target = target,
        .optimize = optimize,
    });
    main_tests.linkLibrary(lib);
    b.step("test", "Run library tests").dependOn(&main_tests.step);

    const module = b.createModule(.{
        .source_file = .{ .path = "src/zeal.zig" },
    });
    addExampleStep("play", "Play audio", b, module, target, optimize);
    addExampleStep("hrtf", "Play audio with HRTF", b, module, target, optimize);
}