Drop support for .NET Standard 2.0 and Mono

See: https://devblogs.microsoft.com/dotnet/the-future-of-net-standard/

.github/workflows/ci.yml

@@ -17,10 +17,6 @@ jobs:
           - os: ubuntu-22.04
             container: mcr.microsoft.com/dotnet/sdk:8.0-alpine3.18
             script: ./build.sh
-          # TODO(kleisauke): Re-enable Mono CI when C# 9 features are supported.
-          # - os: ubuntu-22.04
-          #   script: ./build/test-mono.sh
-          #   allow_failures: true
           - os: macos-12
             script: ./build.sh
           - os: windows-2022
@@ -45,5 +41,4 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Test
-        continue-on-error: ${{ matrix.allow_failures == true }}
         run: ${{ matrix.script }}

CHANGELOG.md

@@ -3,6 +3,11 @@ All notable changes to NetVips will be documented in this file. See [here](CHANG
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.0.0] - TBD
+### Removed
+- Drop support for .NET Standard 2.0 and Mono. NetVips now targets .NET 6 (`net6.0`) and .NET Framework 4.5.2 (`net452`) moving forward.
+  See https://devblogs.microsoft.com/dotnet/the-future-of-net-standard/ for more information.
+
 ## [2.4.2] - 2024-10-13
 ### Fixed
 - Fix incorrect progress reporting on Linux ([#237](https://github.com/kleisauke/net-vips/issues/237)).
@@ -31,7 +36,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Changed
 - Update methods/enums for libvips 8.14.
-- The [NetVips.Extensions](https://www.nuget.org/packages/NetVips.Extensions/) package is now only supported on Windows when targeting .NET 6.0 or higher. See https://aka.ms/systemdrawingnonwindows for more information.
+- The [NetVips.Extensions](https://www.nuget.org/packages/NetVips.Extensions/) package is now only supported on Windows when targeting .NET 6.0 or higher.
+  See https://aka.ms/systemdrawingnonwindows for more information.
 
 ### Fixed
 - Ensure compatibility with FreeBSD and variants.
@@ -45,13 +51,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Changed
 - Update methods/enums for libvips 8.13.
-- Remove internal `VipsSaveable` enum.
 - Avoid throwing general exceptions.
 - Ensure debug and unit tests functions are internal.
 
 ### Fixed
 - Use the correct type for signal handler IDs.
 
+### Removed
+- Remove internal `VipsSaveable` enum.
+
 ## [2.1.0] - 2021-12-02
 ### Added
 - Add `image.SignalHandlerDisconnect()` for disconnecting a signal handler.
@@ -61,7 +69,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Drop internal `ModuleInit.Fody` dependency in favor of the `[ModuleInitializer]` attribute.
 - `image.WriteToBuffer()` tries to use the new target API first.
 - Bump minimum required .NET Framework version to v4.5.2.
-- The [NetVips.Extensions](https://www.nuget.org/packages/NetVips.Extensions/) package is now attributed as a Windows-specific library when targeting .NET 6.0 or higher. See https://aka.ms/systemdrawingnonwindows for more information.
+- The [NetVips.Extensions](https://www.nuget.org/packages/NetVips.Extensions/) package is now attributed as a Windows-specific library when targeting .NET 6.0 or higher.
+  See https://aka.ms/systemdrawingnonwindows for more information.
 
 ### Fixed
 - Ensure recorded delegates are not released too early ([#141](https://github.com/kleisauke/net-vips/issues/141)).
@@ -228,6 +237,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Added
 - First release!
 
+[3.0.0]: https://github.com/kleisauke/net-vips/compare/v2.4.2...v3.0.0
 [2.4.2]: https://github.com/kleisauke/net-vips/compare/v2.4.1...v2.4.2
 [2.4.1]: https://github.com/kleisauke/net-vips/compare/v2.4.0...v2.4.1
 [2.4.0]: https://github.com/kleisauke/net-vips/compare/v2.3.1...v2.4.0

README.md

@@ -37,8 +37,7 @@ which gives some more background.
 ## Supported platforms
 
 - .NET Framework 4.5.2 and higher
-- .NET Standard 2.0 and higher
-- Mono
+- .NET 6.0 and higher
 
 ## Install
 
@@ -58,7 +57,7 @@ libvips binaries for the most common platforms (see
 | **Linux ARM64v8 musl**<sup>3</sup>  | [![NetVips.Native.linux-musl-arm64-badge]][NetVips.Native.linux-musl-arm64-nuget] |
 | **Linux ARMv7**                     | [![NetVips.Native.linux-arm-badge]][NetVips.Native.linux-arm-nuget]               |
 | **macOS x64**                       | [![NetVips.Native.osx-x64-badge]][NetVips.Native.osx-x64-nuget]                   |
-| **macOS ARM64**<sup>4</sup>         | [![NetVips.Native.osx-arm64-badge]][NetVips.Native.osx-arm64-nuget]               |
+| **macOS ARM64**                     | [![NetVips.Native.osx-arm64-badge]][NetVips.Native.osx-arm64-nuget]               |
 
 [NetVips.Native.win-x64-badge]: https://img.shields.io/nuget/v/NetVips.Native.win-x64.svg
 [NetVips.Native.win-x64-nuget]: https://www.nuget.org/packages/NetVips.Native.win-x64
@@ -83,8 +82,7 @@ libvips binaries for the most common platforms (see
 
 <sup>1</sup> The version number of these NuGet packages is in sync with libvips' version number.  
 <sup>2</sup> Uses glibc as the standard C library (Ubuntu, Debian, etc).  
-<sup>3</sup> Uses musl as the standard C library (Alpine, Gentoo Linux, etc).  
-<sup>4</sup> Requires .NET 6.0 or higher.
+<sup>3</sup> Uses musl as the standard C library (Alpine, Gentoo Linux, etc).
 
 Then just install this package, perhaps:
 

build/native/NetVips.Native.linux-arm.nuspec

@@ -22,9 +22,6 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.6.1 build bits for Mono runtime -->
-    <file src="targets\NetVips.Native.linux-arm.targets" target="build/net461" />
-
     <!-- Include libvips Linux ARM64v8 binaries -->
     <file src="pack\linux-arm\*.so*" target="runtimes/linux-arm/native" />
 
@@ -35,7 +32,7 @@
     <file src="pack\linux-arm\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <file src="_._" target="lib/netstandard1.0" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.linux-arm64.nuspec

@@ -22,9 +22,6 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.6.1 build bits for Mono runtime -->
-    <file src="targets\NetVips.Native.linux-arm64.targets" target="build/net461" />
-
     <!-- Include libvips Linux ARM64v8 binaries -->
     <file src="pack\linux-arm64\*.so*" target="runtimes/linux-arm64/native" />
 
@@ -35,7 +32,7 @@
     <file src="pack\linux-arm64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <file src="_._" target="lib/netstandard1.0" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.linux-musl-arm64.nuspec

@@ -32,8 +32,7 @@
     <file src="pack\linux-musl-arm64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <!-- Note: Linux musl ARM64v8 is supported since .NET Core 3.0 (.NET Standard 2.1) -->
-    <file src="_._" target="lib/netstandard2.1" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.linux-musl-x64.nuspec

@@ -22,9 +22,6 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.6.1 build bits for Mono runtime -->
-    <file src="targets\NetVips.Native.linux-musl-x64.targets" target="build/net461" />
-
     <!-- Include libvips Linux musl x64 binaries -->
     <file src="pack\linux-musl-x64\*.so*" target="runtimes/linux-musl-x64/native" />
 
@@ -35,7 +32,7 @@
     <file src="pack\linux-musl-x64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <file src="_._" target="lib/netstandard1.0" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.linux-x64.nuspec

@@ -22,9 +22,6 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.6.1 build bits for Mono runtime -->
-    <file src="targets\NetVips.Native.linux-x64.targets" target="build/net461" />
-
     <!-- Include libvips Linux x64 binaries -->
     <file src="pack\linux-x64\*.so*" target="runtimes/linux-x64/native" />
 
@@ -35,7 +32,7 @@
     <file src="pack\linux-x64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <file src="_._" target="lib/netstandard1.0" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.nuspec

@@ -21,33 +21,20 @@
 
     <!-- dependencies -->
     <dependencies>
-	  <!-- In-sync with netstandard2.0 below except for NetVips.Native.win-arm64, NetVips.Native.linux-musl-arm64 and NetVips.Native.osx-arm64 -->
-      <group targetFramework="netstandard2.1">
+      <group targetFramework="net6.0">
         <dependency id="NetVips.Native.linux-x64" version="$version$" include="native" />
         <dependency id="NetVips.Native.linux-musl-x64" version="$version$" include="native" />
-        <!-- Linux musl ARM64v8 is supported since .NET Core 3.0 (.NET Standard 2.1) -->
         <dependency id="NetVips.Native.linux-musl-arm64" version="$version$" include="native" />
         <dependency id="NetVips.Native.linux-arm" version="$version$" include="native" />
         <dependency id="NetVips.Native.linux-arm64" version="$version$" include="native" />
         <dependency id="NetVips.Native.osx-x64" version="$version$" include="native" />
-        <!-- macOS ARM64 (Apple Silicon) is supported on .NET 6.0, but Mono has back-ported this to .NET Standard 2.1 -->
         <dependency id="NetVips.Native.osx-arm64" version="$version$" include="native" />
         <dependency id="NetVips.Native.win-x64" version="$version$" include="native" />
         <dependency id="NetVips.Native.win-x86" version="$version$" include="native" />
-        <!-- Windows ARM64 is supported since .NET 5.0 and back-ported to .NET Core 3.1 (.NET Standard 2.1) -->
         <dependency id="NetVips.Native.win-arm64" version="$version$" include="native" />
       </group>
-      <group targetFramework="netstandard2.0">
-        <dependency id="NetVips.Native.linux-x64" version="$version$" include="native" />
-        <dependency id="NetVips.Native.linux-musl-x64" version="$version$" include="native" />
-        <dependency id="NetVips.Native.linux-arm" version="$version$" include="native" />
-        <dependency id="NetVips.Native.linux-arm64" version="$version$" include="native" />
-        <dependency id="NetVips.Native.osx-x64" version="$version$" include="native" />
-        <dependency id="NetVips.Native.win-x64" version="$version$" include="native" />
-        <dependency id="NetVips.Native.win-x86" version="$version$" include="native" />
-      </group>
       <group targetFramework="net452">
-        <!-- Only .NET Framework/Mono needs to include the build directory containing the .targets file -->
+        <!-- Only .NET Framework needs to include the build directory containing the .targets file -->
         <dependency id="NetVips.Native.win-x64" version="$version$" include="native, build" />
         <dependency id="NetVips.Native.win-x86" version="$version$" include="native, build" />
       </group>

build/native/NetVips.Native.osx-arm64.nuspec

@@ -32,8 +32,7 @@
     <file src="pack\osx-arm64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <!-- Note: macOS ARM64 (Apple Silicon) is supported on .NET 6.0, but Mono has back-ported this to .NET Standard 2.1 -->
-    <file src="_._" target="lib/netstandard2.1" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.osx-x64.nuspec

@@ -22,9 +22,6 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.6.1 build bits for Mono runtime -->
-    <file src="targets\NetVips.Native.osx-x64.targets" target="build/net461" />
-
     <!-- Include libvips macOS x64 binaries -->
     <file src="pack\osx-x64\*.dylib" target="runtimes/osx-x64/native" />
 
@@ -35,7 +32,7 @@
     <file src="pack\osx-x64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <file src="_._" target="lib/netstandard1.0" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.win-arm64.nuspec

@@ -32,8 +32,7 @@
     <file src="pack\win-arm64\versions.json" />
 
     <!-- A dummy reference which prevents NuGet from adding any compilation references when this package is imported -->
-    <!-- Note: Windows ARM64 is supported since .NET 5.0 and back-ported to .NET Core 3.1 (.NET Standard 2.1) -->
-    <file src="_._" target="lib/netstandard2.1" />
+    <file src="_._" target="lib/net6.0" />
 
   </files>
 </package>

build/native/NetVips.Native.win-x64.nuspec

@@ -22,8 +22,8 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.5 build bits -->
-    <file src="targets\NetVips.Native.win-x64.targets" target="build/net45" />
+    <!-- The .NET Framework >= 4.5.2 build bits -->
+    <file src="targets\NetVips.Native.win-x64.targets" target="build/net452" />
 
     <!-- Include libvips Windows x64 binaries -->
     <file src="pack\win-x64\*.dll" target="runtimes/win-x64/native" />

build/native/NetVips.Native.win-x86.nuspec

@@ -22,8 +22,8 @@
   </metadata>
   <files>
 
-    <!-- The .NET Framework >= 4.5 build bits -->
-    <file src="targets\NetVips.Native.win-x86.targets" target="build/net45" />
+    <!-- The .NET Framework >= 4.5.2 build bits -->
+    <file src="targets\NetVips.Native.win-x86.targets" target="build/net452" />
 
     <!-- Include libvips Windows x86 binaries -->
     <file src="pack\win-x86\*.dll" target="runtimes/win-x86/native" />