Add Windows ARM64 support [initial]

.github/workflows/build.yml

@@ -29,6 +29,20 @@ jobs:
             platform: windows
             qt_version: "6.10"
 
+          # ─── Windows (ARM) ─────────────────────────────────────────
+          - os: windows-11-arm
+            platform: windows
+            qt_version: "6.8"
+            qt_arch: win64_msvc2022_arm64
+            vs_arch: arm64
+            artifact_suffix: -arm64
+          - os: windows-11-arm
+            platform: windows
+            qt_version: "6.10"
+            qt_arch: win64_msvc2022_arm64
+            vs_arch: arm64
+            artifact_suffix: -arm64
+
           # ─── Linux ─────────────────────────────────────────────────
           - os: ubuntu-24.04
             platform: linux
@@ -100,6 +114,7 @@ jobs:
           version: ${{ matrix.qt_version }}
           modules: 'qt5compat'
           cache: true
+          arch: ${{ matrix.qt_arch }}
 
       # ─── Install Qt (macOS via jdpurcell for arch support) ─────
       - name: Install Qt (mac)
@@ -117,7 +132,7 @@ jobs:
         if: matrix.platform == 'windows'
         uses: egor-tensin/vs-shell@v2
         with:
-          arch: x64
+          arch: ${{ matrix.vs_arch || 'x64' }}
 
       - name: Install NSIS
         if: matrix.platform == 'windows'
@@ -171,14 +186,14 @@ jobs:
         uses: actions/upload-artifact@v7
         if: matrix.platform == 'windows'
         with:
-          name: NotepadNext-Windows-Qt${{ matrix.qt_version }}-Zip
+          name: NotepadNext-Windows-Qt${{ matrix.qt_version }}${{ matrix.artifact_suffix }}-Zip
           path: ${{ github.workspace }}/build/package/
 
       - name: Upload Windows Installer
         uses: actions/upload-artifact@v7
         if: matrix.platform == 'windows'
         with:
-          name: NotepadNext-Windows-Qt${{ matrix.qt_version }}-Installer
+          name: NotepadNext-Windows-Qt${{ matrix.qt_version }}${{ matrix.artifact_suffix }}-Installer
           path: ${{ github.workspace }}/installer/NotepadNext*.exe
 
       - name: Upload MacOS dmg
@@ -202,6 +217,7 @@ jobs:
     if: github.repository == 'dail8859/NotepadNext' && github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      QT_ARM64_RELEASE_VER: 6.8
 
     steps:
       - name: Checkout Repository
@@ -225,6 +241,18 @@ jobs:
           cd ..
           gh release upload ${{ github.ref_name }} NotepadNext-${{ github.ref_name }}-win64.zip
 
+      - name: Upload Windows arm64 Installer
+        run: |
+          mv NotepadNext-Windows-Qt$QT_ARM64_RELEASE_VER-arm64-Installer/NotepadNext-${{ github.ref_name }}-Installer.exe NotepadNext-${{ github.ref_name }}-Installer-arm64.exe
+          gh release upload ${{ github.ref_name }} NotepadNext-${{ github.ref_name }}-Installer-arm64.exe
+
+      - name: Upload Windows arm64 Zip
+        run: |
+          cd NotepadNext-Windows-Qt$QT_ARM64_RELEASE_VER-arm64-Zip/
+          zip -r ../NotepadNext-${{ github.ref_name }}-win64-arm64.zip .
+          cd ..
+          gh release upload ${{ github.ref_name }} NotepadNext-${{ github.ref_name }}-win64-arm64.zip
+
       - name: Upload Linux AppImage
         run: |
           gh release upload ${{ github.ref_name }} NotepadNext-Linux-Qt$QT_RELEASE_VER-AppImage/NotepadNext-${{ github.ref_name }}-x86_64.AppImage

cmake/PackagingWindows.cmake

@@ -24,6 +24,28 @@ list(APPEND WINDEPLOYQT_ARGS "${PACKAGE_DIR}/NotepadNext.exe")
 
 file(GLOB EXTRA_DLLS "${EXTRA_DLL_DIR}/*.dll")
 
+# Determine the target architecture. The extra OpenSSL DLLs used by the
+# auto updater are only shipped for x64; ARM64 builds use Qt's Schannel
+# TLS backend instead, so no OpenSSL DLLs are needed.
+if(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "ARM64" OR CMAKE_SYSTEM_PROCESSOR MATCHES "ARM64|aarch64")
+	set(TARGET_ARCH "arm64")
+else()
+	set(TARGET_ARCH "x64")
+endif()
+
+set(OPENSSL_DLL_COMMANDS "")
+if(TARGET_ARCH STREQUAL "x64")
+	list(APPEND OPENSSL_DLL_COMMANDS
+		COMMAND ${CMAKE_COMMAND} -E copy_if_different
+			"${CMAKE_SOURCE_DIR}/deploy/windows/libcrypto-1_1-x64.dll"
+			"${PACKAGE_DIR}/libcrypto-1_1-x64.dll"
+
+		COMMAND ${CMAKE_COMMAND} -E copy_if_different
+			"${CMAKE_SOURCE_DIR}/deploy/windows/libssl-1_1-x64.dll"
+			"${PACKAGE_DIR}/libssl-1_1-x64.dll"
+	)
+endif()
+
 # Define the package target
 add_custom_target(package
 	COMMENT "Packaging NotepadNext for distribution"
@@ -39,14 +61,8 @@ add_custom_target(package
 		"${CMAKE_SOURCE_DIR}/LICENSE"
 		"${PACKAGE_DIR}/LICENSE"
 
-	# Copy the two extra DLLs
-	COMMAND ${CMAKE_COMMAND} -E copy_if_different
-		"${CMAKE_SOURCE_DIR}/deploy/windows/libcrypto-1_1-x64.dll"
-		"${PACKAGE_DIR}/libcrypto-1_1-x64.dll"
-
-	COMMAND ${CMAKE_COMMAND} -E copy_if_different
-		"${CMAKE_SOURCE_DIR}/deploy/windows/libssl-1_1-x64.dll"
-		"${PACKAGE_DIR}/libssl-1_1-x64.dll"
+	# Copy the two extra DLLs (x64 only, see TARGET_ARCH above)
+	${OPENSSL_DLL_COMMANDS}
 
 	# Run windeployqt with correct flags
 	COMMAND windeployqt ${WINDEPLOYQT_ARGS}

installer/installer.nsi

@@ -243,7 +243,10 @@ ${MementoSection} "Auto Updater" SEC_AUTO_UPDATER
 	SetRegView 64
 	SetOutPath $INSTDIR
 
-	File ..\build\package\libcrypto-1_1-x64.dll ..\build\package\libssl-1_1-x64.dll
+	# The OpenSSL DLLs are only shipped with x64 builds; ARM64 builds use Qt's Schannel TLS backend
+	!if /FILEEXISTS "..\build\package\libcrypto-1_1-x64.dll"
+		File ..\build\package\libcrypto-1_1-x64.dll ..\build\package\libssl-1_1-x64.dll
+	!endif
 
 	WriteRegDWORD SHCTX "Software\NotepadNext\NotepadNext\" "AutoUpdate" 1
 ${MementoSectionEnd}

src/dialogs/MainWindow.cpp

@@ -2187,6 +2187,15 @@ void MainWindow::checkForUpdates(bool silent)
     qInfo(Q_FUNC_INFO);
 
     QString url = "https://github.com/dail8859/NotepadNext/raw/master/updates.json";
+
+#if defined(_M_ARM64) || defined(__aarch64__)
+    // updates.json only points to the x64 installer, so ARM64 builds check
+    // the "windows-arm64" key instead. Until that key is added to the json,
+    // the updater will never report an available update which effectively
+    // disables the auto updater rather than downloading a useless x64 installer.
+    QSimpleUpdater::getInstance()->setPlatformKey(url, "windows-arm64");
+#endif
+
     QSimpleUpdater::getInstance()->checkForUpdates(url);
 
     if (!silent) {