refactor(ci): deduplicate dmg init

Author: eliandoran

.github/workflows/main.yml

@@ -37,9 +37,10 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 20
-      - name: Set up Python for appdmg to be installed
-        if: ${{ matrix.os.name == 'macos' }}
-        run: brew install python-setuptools
+      - name: Run the build
+        uses: ./.github/actions/build
+        with:
+          os: ${{ matrix.os.name }}
       - name: Install dependencies
         run: npm ci
       - name: Update build info

.github/workflows/nightly.yml

@@ -34,9 +34,10 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 20
-      - name: Set up Python for appdmg to be installed
-        if: ${{ matrix.os.name == 'macos' }}
-        run: brew install python-setuptools
+      - name: Run the build
+        uses: ./.github/actions/build
+        with:
+          os: ${{ matrix.os.name }}
       - name: Install dependencies
         run: npm ci
       - name: Update build info

.github/workflows/release.yml

@@ -34,9 +34,10 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 20
-      - name: Set up Python for appdmg to be installed
-        if: ${{ matrix.os.name == 'macos' }}
-        run: brew install python-setuptools
+      - name: Run the build
+        uses: ./.github/actions/build
+        with:
+          os: ${{ matrix.os.name }}
       - name: Install dependencies
         run: npm ci
       - name: Update build info