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// Build recipe
// Copyright (C) 2021-2022  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 Builder = std.build.Builder;
const LibExeObjStep = std.build.LibExeObjStep;
const Mode = std.builtin.Mode;

fn addExampleStep(comptime name: []const u8, description: []const u8,
                  b: *Builder, lib: *LibExeObjStep, mode: Mode) void {
    const bin = b.addExecutable(name, "examples/" ++ name ++ ".zig");
    bin.addPackagePath("zeal", "src/zeal.zig");
    bin.linkLibrary(lib);
    bin.setBuildMode(mode);

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

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

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

    const lib = b.addStaticLibrary("zeal", "src/zeal.zig");
    link(lib);
    lib.setBuildMode(mode);
    lib.install();

    var main_tests = b.addTest("src/zeal.zig");
    main_tests.linkLibrary(lib);
    main_tests.setBuildMode(mode);
    b.step("test", "Run library tests").dependOn(&main_tests.step);

    addExampleStep("play", "Play audio", b, lib, mode);
    addExampleStep("hrtf", "Play audio with HRTF", b, lib, mode);
}