[Build] Update artifacts only when needed (#150)

.github/workflows/ci.yml

@@ -69,16 +69,16 @@ jobs:
       - name: Ant Version
         run: ant -version
 
-      - if: matrix.os == 'ubuntu-latest'
-        name: Install MinGW-w64/GCC/G++ (Linux & Windows)
+      - name: Install MinGW-w64/GCC/G++ (Linux & Windows)
+        if: matrix.os == 'ubuntu-latest'
         run: sudo apt install mingw-w64
 
-      - if: matrix.os == 'ubuntu-latest' && matrix.type == 'linux' && matrix.freetype == true
-        name: FreeType - Install (Linux)
+      - name: FreeType - Install (Linux)
+        if: matrix.os == 'ubuntu-latest' && matrix.type == 'linux' && matrix.freetype == true
         run: sudo apt install libfreetype6-dev
 
-      - if: matrix.os == 'ubuntu-latest' && matrix.type == 'windows' && matrix.freetype == true
-        name: FreeType - Install (Windows)
+      - name: FreeType - Install (Windows)
+        if: matrix.os == 'ubuntu-latest' && matrix.type == 'windows' && matrix.freetype == true
         run: |
           sudo mkdir /freetype
           sudo tar -xzf ./vendor/freetype-2.12.1.tar.gz -C /freetype --strip-components=1
@@ -98,8 +98,8 @@ jobs:
           path: ${{ matrix.expected }}
 
   update-bin:
-    if: github.ref == 'refs/heads/main' # runs only on the main branch
     name: Update Binaries
+    if: github.ref == 'refs/heads/main' # runs only on the main branch
     runs-on: ubuntu-latest
     needs: build-natives
     steps:
@@ -111,20 +111,33 @@ jobs:
         with:
           path: /tmp/artifacts
 
+      - name: Equal Artifacts
+        id: equal-artifacts
+        continue-on-error: true
+        run: |
+          python3 buildSrc/scripts/equal_file_size.py /tmp/artifacts/native-libraries/imgui-java64.dll bin/imgui-java64.dll
+          python3 buildSrc/scripts/equal_file_size.py /tmp/artifacts/native-libraries/libimgui-java64.dylib bin/libimgui-java64.dylib
+          python3 buildSrc/scripts/equal_file_size.py /tmp/artifacts/native-libraries/libimgui-java64.so bin/libimgui-java64.so
+          python3 buildSrc/scripts/equal_file_size.py /tmp/artifacts/native-libraries-with-freetype/imgui-java64.dll bin/freetype/imgui-java64.dll
+          python3 buildSrc/scripts/equal_file_size.py /tmp/artifacts/native-libraries-with-freetype/libimgui-java64.dylib bin/freetype/libimgui-java64.dylib
+          python3 buildSrc/scripts/equal_file_size.py /tmp/artifacts/native-libraries-with-freetype/libimgui-java64.so bin/freetype/libimgui-java64.so
+
       - name: Update
+        if: steps.equal-artifacts.outcome != 'success'
         run: |
           mv /tmp/artifacts/native-libraries/* bin/
           mv /tmp/artifacts/native-libraries-with-freetype/* bin/freetype/
 
       - name: Commit
+        if: steps.equal-artifacts.outcome != 'success'
         uses: EndBug/add-and-commit@v9
         with:
           default_author: github_actions
           message: '[ci skip] update native binaries'
 
   release:
-    if: startsWith(github.ref, 'refs/tags/v') # if tag starts with "v"
     name: Release
+    if: startsWith(github.ref, 'refs/tags/v') # if tag starts with "v"
     runs-on: ubuntu-latest
     needs: [ build-java, build-natives ]
     steps:

buildSrc/scripts/equal_file_size.py

@@ -0,0 +1,8 @@
+import sys
+import os
+
+# A python script to compare file size of two files.
+# Used to compare sizes of binaries to see, if there is a difference between them.
+# Shell scripts are not used, since Python is a more portable solution.
+
+os.path.getsize(sys.argv[1]) == os.path.getsize(sys.argv[2]) if sys.exit(0) else sys.exit(1)