Piper static build

build.zig

// Build Piper-TTS into a static binary

const std = @import("std");
const ArrayListu8 = std.ArrayList([]const u8);

/// Non-recursively iterate over a directory and add its *.c paths to paths.
/// This isn't used anywhere, but I'm putting it here in case anyone finds it useful.
/// If you want it to be recursive, you basically change dir.iterate() to dir.walk().
pub fn glob_sources(allocator: std.mem.Allocator, base: []const u8, ext: []const u8, paths: *ArrayListu8) !void {
    var dir = try std.fs.cwd().openDir(base, .{ .iterate = true });
    var iterator = dir.iterate();

    while (try iterator.next()) |entry| {
        const path_ext = std.fs.path.extension(entry.name);
        if (std.mem.eql(u8, path_ext, ext)) {
            const path = try std.fs.path.join(allocator, &.{ base, entry.name });
            try paths.append(path);
        }
    }
}

pub fn build(b: *std.Build) !void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    // ----------------------------------------------------
    // Espeak-ng (todo, the espeak-ng data needs to be installed prior to this)
    // ----------------------------------------------------

    const espeakg_ng = b.addStaticLibrary(.{
        .name = "espeak_ng",
        .target = target,
        .optimize = optimize,
    });

    espeakg_ng.addIncludePath(.{ .path = "espeak-ng/src/include" });
    espeakg_ng.addIncludePath(.{ .path = "espeak-ng/src/ucd-tools/src/include" });
    espeakg_ng.addIncludePath(.{ .path = "espeak-ng/src/speechPlayer/include" });

    espeakg_ng.addCSourceFiles(.{ .files = &.{
        "espeak-ng/src/libespeak-ng/common.c",
        "espeak-ng/src/libespeak-ng/mnemonics.c",
        "espeak-ng/src/libespeak-ng/error.c",
        "espeak-ng/src/libespeak-ng/ieee80.c",
        "espeak-ng/src/libespeak-ng/compiledata.c",
        "espeak-ng/src/libespeak-ng/compiledict.c",
        "espeak-ng/src/libespeak-ng/dictionary.c",
        "espeak-ng/src/libespeak-ng/encoding.c",
        "espeak-ng/src/libespeak-ng/intonation.c",
        "espeak-ng/src/libespeak-ng/langopts.c",
        "espeak-ng/src/libespeak-ng/numbers.c",
        "espeak-ng/src/libespeak-ng/phoneme.c",
        "espeak-ng/src/libespeak-ng/phonemelist.c",
        "espeak-ng/src/libespeak-ng/readclause.c",
        "espeak-ng/src/libespeak-ng/setlengths.c",
        "espeak-ng/src/libespeak-ng/soundicon.c",
        "espeak-ng/src/libespeak-ng/spect.c",
        "espeak-ng/src/libespeak-ng/ssml.c",
        "espeak-ng/src/libespeak-ng/synthdata.c",
        "espeak-ng/src/libespeak-ng/synthesize.c",
        "espeak-ng/src/libespeak-ng/tr_languages.c",
        "espeak-ng/src/libespeak-ng/translate.c",
        "espeak-ng/src/libespeak-ng/translateword.c",
        "espeak-ng/src/libespeak-ng/voices.c",
        "espeak-ng/src/libespeak-ng/wavegen.c",
        "espeak-ng/src/libespeak-ng/speech.c",
        "espeak-ng/src/libespeak-ng/espeak_api.c",
    } });
    espeakg_ng.addCSourceFiles(.{ .files = &.{
        "espeak-ng/src/ucd-tools/src/case.c",
        "espeak-ng/src/ucd-tools/src/categories.c",
        "espeak-ng/src/ucd-tools/src/ctype.c",
        "espeak-ng/src/ucd-tools/src/proplist.c",
        "espeak-ng/src/ucd-tools/src/scripts.c",
        "espeak-ng/src/ucd-tools/src/tostring.c",
    } });

    espeakg_ng.installHeadersDirectory(b.path("espeak-ng/src/include/espeak"), "espeak", .{});
    espeakg_ng.installHeadersDirectory(b.path("espeak-ng/src/include/espeak-ng"), "espeak-ng", .{});
    espeakg_ng.linkSystemLibrary("c");
    espeakg_ng.linkSystemLibrary("c++");

    // Install the artifact, because certain include headers need to be present
    b.installArtifact(espeakg_ng);

    // ----------------------------------------------------
    // Piper-phonemize
    // ----------------------------------------------------

    const piper_phonemize = b.addStaticLibrary(.{ .name = "piper_phonemize", .target = target, .optimize = optimize });

    piper_phonemize.addCSourceFiles(.{ .files = &.{
        "piper-phonemize/src/phonemize.cpp",
        "piper-phonemize/src/phoneme_ids.cpp",
        "piper-phonemize/src/tashkeel.cpp",
        "piper-phonemize/src/shared.cpp",
    } });

    piper_phonemize.addIncludePath(.{ .path = "piper-phonemize/src" });

    piper_phonemize.installHeader(b.path("piper-phonemize/src/phonemize.hpp"), "piper-phonemize/phonemize.hpp");
    piper_phonemize.installHeader(b.path("piper-phonemize/src/shared.hpp"), "piper-phonemize/shared.hpp");
    piper_phonemize.installHeader(b.path("piper-phonemize/src/phoneme_ids.hpp"), "piper-phonemize/phoneme_ids.hpp");
    piper_phonemize.installHeader(b.path("piper-phonemize/src/tashkeel.hpp"), "piper-phonemize/tashkeel.hpp");
    piper_phonemize.installHeader(b.path("piper-phonemize/src/json.hpp"), "piper-phonemize/json.hpp");

    piper_phonemize.linkSystemLibrary("c++");
    piper_phonemize.linkLibrary(espeakg_ng);

    b.installArtifact(piper_phonemize);

    // ----------------------------------------------------
    // Main piper executable
    // ----------------------------------------------------

    const piper = b.addExecutable(.{
        .name = "piper",
        .target = target,
        .optimize = optimize,
    });

    piper.addCSourceFiles(.{ .files = &.{
        "piper/src/cpp/main.cpp",
        "piper/src/cpp/piper.cpp",
    } });

    // Add spdlog to piper directly
    piper.addCSourceFiles(.{ .files = &.{
        "spdlog/src/spdlog.cpp",
        "spdlog/src/stdout_sinks.cpp",
        "spdlog/src/color_sinks.cpp",
        "spdlog/src/file_sinks.cpp",
        "spdlog/src/async.cpp",
        "spdlog/src/cfg.cpp",
        "spdlog/src/bundled_fmtlib_format.cpp",
    }, .flags = &.{"-DSPDLOG_COMPILED_LIB"} });

    piper.addIncludePath(.{ .path = "spdlog/include" });

    piper.linkLibrary(piper_phonemize);

    piper.linkSystemLibrary("c++");
    piper.linkSystemLibrary("onnxruntime");

    b.installArtifact(piper);
}