build.zig

const std = @import("std");

const app_bundle = "MacDirStat.app";
const macos_dir = app_bundle ++ "/Contents/MacOS";
const resources_dir = app_bundle ++ "/Contents/Resources";

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{});
    // ReleaseSafe by default: the scanner does a lot of index arithmetic over a
    // hand-managed node array, and the bounds checks cost far less than the
    // syscalls they sit between. Spelled out rather than via
    // `standardOptimizeOption`, which swaps `-Doptimize` for a `-Drelease`
    // boolean as soon as a preferred mode is given.
    const optimize = b.option(
        std.builtin.OptimizeMode,
        "optimize",
        "Optimization mode (default: ReleaseSafe)",
    ) orelse .ReleaseSafe;

    const mod = b.createModule(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
        .link_libc = true,
    });
    // Zig ships only libSystem for Darwin; AppKit and friends live in Apple's
    // SDK, and it only auto-detects that for the *native* target. Building the
    // other macOS architecture — which a universal release needs — therefore
    // has to be pointed at the SDK explicitly.
    if (target.result.os.tag.isDarwin() and !target.query.isNative()) {
        const sdk = std.mem.trim(u8, b.run(&.{ "xcrun", "--show-sdk-path" }), " \r\n");
        mod.addSystemFrameworkPath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "System/Library/Frameworks" }) });
        mod.addSystemIncludePath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "usr/include" }) });
        mod.addLibraryPath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "usr/lib" }) });
    }

    mod.linkFramework("Foundation", .{});
    mod.linkFramework("AppKit", .{});
    mod.linkFramework("CoreGraphics", .{});
    mod.linkFramework("UniformTypeIdentifiers", .{});

    const exe = b.addExecutable(.{
        .name = "macdirstat",
        .root_module = mod,
    });

    const install_exe = b.addInstallArtifact(exe, .{
        .dest_dir = .{ .override = .{ .custom = macos_dir } },
    });
    b.getInstallStep().dependOn(&install_exe.step);

    // Generated by `macdirstat --make-icon`, then `iconutil -c icns`.
    const install_icon = b.addInstallFile(
        b.path("resources/MacDirStat.icns"),
        resources_dir ++ "/MacDirStat.icns",
    );
    b.getInstallStep().dependOn(&install_icon.step);

    const plist = b.addWriteFiles();
    const plist_file = plist.add("Info.plist", info_plist);
    const install_plist = b.addInstallFile(plist_file, app_bundle ++ "/Contents/Info.plist");
    b.getInstallStep().dependOn(&install_plist.step);

    // Ad-hoc sign the finished bundle. Without a stable signature macOS treats
    // each rebuild as a different program, so a Full Disk Access grant — which
    // this needs to measure ~/Library at all — would have to be given again
    // every time.
    const sign = b.addSystemCommand(&.{
        "codesign", "--force", "--sign", "-",
        b.pathJoin(&.{ b.install_prefix, app_bundle }),
    });
    sign.step.dependOn(&install_exe.step);
    sign.step.dependOn(&install_plist.step);
    sign.step.dependOn(&install_icon.step);
    b.getInstallStep().dependOn(&sign.step);

    // The binary must run from inside the bundle so AppKit finds Info.plist and
    // the process gets a proper activation policy and TCC identity.
    const run = b.addSystemCommand(&.{
        b.pathJoin(&.{ b.install_prefix, macos_dir, "macdirstat" }),
    });
    run.step.dependOn(b.getInstallStep());
    if (b.args) |args| run.addArgs(args);
    b.step("run", "Build and run MacDirStat.app").dependOn(&run.step);

    const test_mod = b.createModule(.{
        .root_source_file = b.path("src/test_all.zig"),
        .target = target,
        .optimize = optimize,
        .link_libc = true,
    });
    test_mod.linkFramework("Foundation", .{});
    test_mod.linkFramework("AppKit", .{});
    test_mod.linkFramework("CoreGraphics", .{});
    const unit_tests = b.addTest(.{ .root_module = test_mod });
    const run_tests = b.addRunArtifact(unit_tests);
    b.step("test", "Run unit tests").dependOn(&run_tests.step);
}

const info_plist =
    \\<?xml version="1.0" encoding="UTF-8"?>
    \\<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    \\<plist version="1.0">
    \\<dict>
    \\  <key>CFBundleDevelopmentRegion</key>
    \\  <string>en</string>
    \\  <key>CFBundleExecutable</key>
    \\  <string>macdirstat</string>
    \\  <key>CFBundleIconFile</key>
    \\  <string>MacDirStat</string>
    \\  <key>CFBundleIdentifier</key>
    \\  <string>nl.typeguru.macdirstat</string>
    \\  <key>CFBundleInfoDictionaryVersion</key>
    \\  <string>6.0</string>
    \\  <key>CFBundleName</key>
    \\  <string>MacDirStat</string>
    \\  <key>CFBundleDisplayName</key>
    \\  <string>MacDirStat</string>
    \\  <key>CFBundlePackageType</key>
    \\  <string>APPL</string>
    \\  <key>CFBundleShortVersionString</key>
    \\  <string>0.1.0</string>
    \\  <key>CFBundleVersion</key>
    \\  <string>1</string>
    \\  <key>NSHumanReadableCopyright</key>
    \\  <string>Disk usage as a treemap. After WinDirStat.</string>
    \\  <key>LSApplicationCategoryType</key>
    \\  <string>public.app-category.utilities</string>
    \\  <key>LSMinimumSystemVersion</key>
    \\  <string>12.0</string>
    \\  <key>NSHighResolutionCapable</key>
    \\  <true/>
    \\  <key>NSSupportsAutomaticGraphicsSwitching</key>
    \\  <true/>
    \\  <key>NSDesktopFolderUsageDescription</key>
    \\  <string>MacDirStat needs access to measure the size of your Desktop.</string>
    \\  <key>NSDocumentsFolderUsageDescription</key>
    \\  <string>MacDirStat needs access to measure the size of your Documents.</string>
    \\  <key>NSDownloadsFolderUsageDescription</key>
    \\  <string>MacDirStat needs access to measure the size of your Downloads.</string>
    \\  <key>NSRemovableVolumesUsageDescription</key>
    \\  <string>MacDirStat needs access to measure the size of external volumes.</string>
    \\</dict>
    \\</plist>
    \\
;