webui/build.zig

const std = @import("std");
const builtin = @import("builtin");

const Build = std.Build;
const OptimizeMode = std.builtin.OptimizeMode;
const CrossTarget = std.zig.CrossTarget;
const Compile = Build.Step.Compile;
const Module = Build.Module;

const min_zig_string = "0.11.0";

const default_isStatic = true;
const default_enableTLS = false;

const current_zig = builtin.zig_version;

comptime {
    const min_zig = std.SemanticVersion.parse(min_zig_string) catch unreachable;
    if (current_zig.order(min_zig) == .lt) {
        @compileError(std.fmt.comptimePrint("Your Zig version v{} does not meet the minimum build requirement of v{}", .{ current_zig, min_zig }));
    }
}

pub fn build(b: *std.Build) void {
    const isStatic = b.option(bool, "is_static", "whether lib is static") orelse default_isStatic;
    const enableTLS = b.option(bool, "enable_tls", "whether lib enable tls") orelse default_enableTLS;
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    if (enableTLS) {
        std.log.info("enable TLS support", .{});
        if (!target.isNative()) {
            std.log.info("when enable tls, not support cross compile", .{});
            std.os.exit(1);
        }
    }

    const webui = build_webui(b, optimize, target, isStatic, enableTLS);
    webui.linkLibrary(build_civetweb(b, optimize, target, isStatic, enableTLS));

    webui.installHeader("include/webui.h", "webui.h");

    b.installArtifact(webui);
}

fn build_webui(b: *Build, optimize: OptimizeMode, target: CrossTarget, is_static: bool, enable_tls: bool) *Compile {
    const name = "webui";
    const webui = if (is_static) b.addStaticLibrary(.{
        .name = name,
        .target = target,
        .optimize = optimize,
    }) else b.addSharedLibrary(.{
        .name = name,
        .target = target,
        .optimize = optimize,
    });

    webui.addCSourceFile(.{
        .file = .{
            .path = "src/webui.c",
        },
        .flags = if (enable_tls)
            &[_][]const u8{
                "-DNO_SSL",
                "-DWEBUI_TLS",
                "-DNO_SSL_DL",
                "-DOPENSSL_API_1_1",
            }
        else
            &[_][]const u8{
                "-DNO_SSL",
            },
    });

    webui.linkLibC();

    webui.addIncludePath(.{
        .path = "include",
    });

    return webui;
}

fn build_civetweb(b: *Build, optimize: OptimizeMode, target: CrossTarget, is_static: bool, enable_tls: bool) *Compile {
    const name = "civetweb";
    const civetweb = if (is_static) b.addStaticLibrary(.{
        .name = name,
        .target = target,
        .optimize = optimize,
    }) else b.addSharedLibrary(.{
        .name = name,
        .target = target,
        .optimize = optimize,
    });

    civetweb.addIncludePath(.{
        .path = "include",
    });

    const cflags = if (target.os_tag == .windows and !enable_tls) &[_][]const u8{
        "-DNO_SSL",
        "-DNDEBUG",
        "-DNO_CACHING",
        "-DNO_CGI",
        "-DUSE_WEBSOCKET",
        "-DMUST_IMPLEMENT_CLOCK_GETTIME",
    } else if (target.os_tag == .windows and enable_tls) &[_][]const u8{
        "-DNDEBUG",
        "-DNO_CACHING",
        "-DNO_CGI",
        "-DUSE_WEBSOCKET",
        "-DWEBUI_TLS",
        "-DNO_SSL_DL",
        "-DOPENSSL_API_1_1",
        "-DMUST_IMPLEMENT_CLOCK_GETTIME",
    } else if (target.os_tag != .windows and enable_tls)
        &[_][]const u8{
            "-DNDEBUG",
            "-DNO_CACHING",
            "-DNO_CGI",
            "-DUSE_WEBSOCKET",
            "-DWEBUI_TLS",
            "-DNO_SSL_DL",
            "-DOPENSSL_API_1_1",
        }
    else
        &[_][]const u8{
            "-DNO_SSL",
            "-DNDEBUG",
            "-DNO_CACHING",
            "-DNO_CGI",
            "-DUSE_WEBSOCKET",
        };

    civetweb.addCSourceFile(.{
        .file = .{
            .path = "src/civetweb/civetweb.c",
        },
        .flags = cflags,
    });

    civetweb.linkLibC();

    if (target.os_tag == .windows) {
        civetweb.linkSystemLibrary("ws2_32");
        if (enable_tls) {
            civetweb.linkSystemLibrary("bcrypt");
        }
    }
    if (enable_tls) {
        civetweb.linkSystemLibrary("ssl");
        civetweb.linkSystemLibrary("crypto");
    }

    return civetweb;
}