Add Github action for building EXE

.github/workflows/ant.yml

@@ -0,0 +1,45 @@
+name: Make self-contained Windows EXE
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+    - v*
+
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup Java runtime
+      uses: actions/setup-java@v3
+      with:
+        distribution: zulu
+        java-version: 17
+        java-package: jdk+fx
+    - name: Build with Ant
+      run: ant -noinput -buildfile build.xml compile jar
+    - name: Fetch 7-zip SFX
+      run: |
+        curl -LO https://www.7-zip.org/a/lzma2201.7z
+        7z e '-i!bin/7zSD.sfx' lzma2201.7z
+    - name: Download Java runtime for executable
+      uses: actions/setup-java@v3
+      with:
+        distribution: zulu
+        java-version: 17
+        java-package: jre+fx
+    - name: Create archive
+      run: |
+        mkdir pattypan-exe
+        cp -r ${{ env.JAVA_HOME }} pattypan-exe/java
+        cp pattypan.jar pattypan-exe
+        cp bundle/run.bat pattypan-exe
+        cd pattypan-exe
+        7z a -mx1 ../pattypan.7z *
+    - name: Create executable
+      run: cmd /c copy /b 7zSD.sfx + bundle\7z-sfx.cfg + pattypan.7z pattypan.exe
+    - name: Make release
+      uses: softprops/action-gh-release@v1
+      with:
+        files: pattypan.exe

README.md

@@ -4,9 +4,13 @@ Tool that simplifies [Wikimedia Commons](https://commons.wikimedia.org/) batch f
 
 For more information on usage, see [Commons:Pattypan](https://commons.wikimedia.org/wiki/Commons:Pattypan).
 
-__[:arrow_down: Download](https://github.com/yarl/pattypan/releases)__
+__[:arrow_down: Download](https://github.com/Wikimedia-Sverige/pattypan/releases)__
 
-----
+* Download the EXE file from downloads linked above.
+* Launch the EXE file.
+  * You may see a popup saying "Windows protected your PC" and a text about the file not being recognised. Select "More info" ([image](readme-images/windows-protected-your-pc-more-info.png)) and then "Run anyway".
+* You will see a popup from User Account Control asking if you want to run. Select "Yes".
+* After closing Pattypan the first time you may see a popup saying "This program might not have installed correctly". Select "This program installed correctly" to not see it again.
 
 ### Build and run
 [Apache Ant](https://ant.apache.org/) is used for building Pattypan. You need to have JDK 11 or later installed as well as [a download of OpenJFX](https://gluonhq.com/products/javafx/) for each platform you want to support. In order to download and build source code, do the following:

bundle/7z-sfx.cfg

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+;!@Install@!UTF-8!
+Title="Pattypan"
+RunProgram="run.bat"
+;!@InstallEnd@!

bundle/run.bat

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+java\bin\java.exe -jar pattypan.jar