Directory.Build.targets

<Project>

  <!--
    Pack each packable library's own README.md as the NuGet package readme so it
    is shown on nuget.org. Applied here (rather than in every .csproj) so every
    current and future packable project that ships a README.md picks it up
    automatically. Imported after the SDK default items, so the existing
    README.md None item is updated rather than re-included (avoiding NETSDK1022).
  -->
  <PropertyGroup Condition="'$(IsPackable)' != 'false' And Exists('$(MSBuildProjectDirectory)/README.md')">
    <PackageReadmeFile>README.md</PackageReadmeFile>
  </PropertyGroup>

  <ItemGroup Condition="'$(IsPackable)' != 'false' And Exists('$(MSBuildProjectDirectory)/README.md')">
    <None Update="README.md" Pack="true" PackagePath="/" />
  </ItemGroup>

  <!--
    Ship the repository's third-party notices (Apache-2.0 Open Sans / Droid Sans
    fonts redistributed by EncDotNet.S100.Renderers.Skia and
    EncDotNet.S100.Specifications) inside every package, so binary consumers
    receive the required license text + attribution (Apache-2.0 §4). The file is
    self-contained (attributions + full licence text).
  -->
  <ItemGroup Condition="'$(IsPackable)' != 'false' And Exists('$(MSBuildThisFileDirectory)THIRD-PARTY-NOTICES.md')">
    <None Include="$(MSBuildThisFileDirectory)THIRD-PARTY-NOTICES.md" Pack="true" PackagePath="/" Visible="false" />
  </ItemGroup>

  <!--
    SkiaSharp Linux native selection (issue #23).

    The regular `SkiaSharp.NativeAssets.Linux` native `libSkiaSharp.so` (pulled in
    transitively via Mapsui, Avalonia.Skia and Topten.RichTextKit) declares
    undefined `uuid_*` and `FT_Get_BDF_Property` symbols that it expects the host
    to satisfy from system libuuid / libfreetype. On arm64 those are not
    resolvable from the (local-scope) dlopen that fontconfig/freetype use, so any
    Skia render path aborts at runtime with `undefined symbol: …` once those
    system libraries load — which breaks both the viewer and the `s100` CLI on
    arm64 Linux desktops (and the arm64 CI test runner, which has fontconfig).

    Projects that emit or load Skia on Linux (the viewer, the CLI, and the Skia /
    visual-regression test projects) opt in by setting
    `<UseSkiaSharpLinuxNoDependencies>true</UseSkiaSharpLinuxNoDependencies>`. That
    excludes the regular native and ships the self-contained `…NoDependencies`
    build instead, whose `libSkiaSharp.so` statically bundles those dependencies
    and renders on both x64 and arm64 regardless of the host's fontconfig/freetype.
    The package version is unchanged (kept in lockstep in Directory.Packages.props),
    so the swap is ABI-neutral for the managed SkiaSharp binding.
  -->
  <ItemGroup Condition="'$(UseSkiaSharpLinuxNoDependencies)' == 'true'">
    <PackageReference Include="SkiaSharp.NativeAssets.Linux" ExcludeAssets="all" PrivateAssets="all" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" />
  </ItemGroup>

</Project>