ci: merge per-OS build steps into single bash branch

Author: janicduplessis

.github/workflows/android.yml

@@ -50,16 +50,15 @@ jobs:
         run: yarn install
         working-directory: example
       - name: Build android example app with new arch disabled
-        if: runner.os != 'Windows'
-        run: ./gradlew assembleDebug -PnewArchEnabled=false
-        working-directory: example/android
-      - name: Build android example app with new arch disabled (Windows)
-        if: runner.os == 'Windows'
-        shell: cmd
         run: |
-          subst W: "%GITHUB_WORKSPACE%"
-          cd /D W:\example\android
-          call gradlew.bat assembleDebug -PnewArchEnabled=false
+          if [[ "$RUNNER_OS" == "Windows" ]]; then
+            # subst the workspace to a short drive to avoid Windows MAX_PATH
+            # in CMake-generated object file names from autolinked codegen.
+            MSYS_NO_PATHCONV=1 cmd /c 'subst W: "%GITHUB_WORKSPACE%" && cd /D W:\example\android && call gradlew.bat assembleDebug -PnewArchEnabled=false'
+          else
+            cd example/android
+            ./gradlew assembleDebug -PnewArchEnabled=false
+          fi
   android-build-fabric:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -93,13 +92,12 @@ jobs:
         run: yarn install
         working-directory: example
       - name: Build android example app with new arch enabled
-        if: runner.os != 'Windows'
-        run: ./gradlew assembleDebug -PnewArchEnabled=true
-        working-directory: example/android
-      - name: Build android example app with new arch enabled (Windows)
-        if: runner.os == 'Windows'
-        shell: cmd
         run: |
-          subst W: "%GITHUB_WORKSPACE%"
-          cd /D W:\example\android
-          call gradlew.bat assembleDebug -PnewArchEnabled=true
+          if [[ "$RUNNER_OS" == "Windows" ]]; then
+            # subst the workspace to a short drive to avoid Windows MAX_PATH
+            # in CMake-generated object file names from autolinked codegen.
+            MSYS_NO_PATHCONV=1 cmd /c 'subst W: "%GITHUB_WORKSPACE%" && cd /D W:\example\android && call gradlew.bat assembleDebug -PnewArchEnabled=true'
+          else
+            cd example/android
+            ./gradlew assembleDebug -PnewArchEnabled=true
+          fi