try caching

Author: hernandev

.github/workflows/build.yml

@@ -20,6 +20,10 @@ jobs:
       ALPINE_VERSION: ${{ matrix.alpine }}
       PHP_VERSION: ${{ matrix.php }}
       PHP_MINOR_VERSION: ${{ matrix.release }}
+      ALPINE_VERSION_SLUG: v${{ matrix.alpine }}
+      PHP_VERSION_SLUG: php-${{ env.PHP_VERSION }}
+      PA_BUILD_SLUG: alpine-v${{ matrix.alpine }}_php-${{ matrix.php }}
+      PA_BUILD_PATH: v${{ matrix.alpine }}/php-${{ matrix.php }}
 
     strategy:
       matrix:
@@ -63,23 +67,22 @@ jobs:
       - name: git-checkout
         uses: actions/checkout@v2
 
+      # cache packages.
+      - name: cache
+        uses: actions/cache@v2
+        with:
+          path: repo/${{ env.PA_BUILD_PATH }}/
+          key: ${{ env.PA_BUILD_SLUG }}
+
       # debug info.
       - name: debug-info
         run: |
           echo -e "Job strategy: "
           echo -e "Alpine Linux: v${{ env.ALPINE_VERSION }}"
           echo -e "PHP Version: ${{ env.PHP_VERSION }}"
           echo -e "PHP Release: ${{ env.PHP_MINOR_VERSION }}"
-
-      # download previously built artifacts.
-      - uses: actions/download-artifact@v2
-        with:
-          name: alpine-v${{ env.ALPINE_VERSION }}-php-${{ env.PHP_VERSION }}
-          path: repo/v${{ env.ALPINE_VERSION }}/php-${{ env.PHP_VERSION }}
-
-      # debug files.
-      - name: Display structure of downloaded files
-        run: ls -lhart repo/v${{ env.ALPINE_VERSION }}/php-${{ env.PHP_VERSION }}
+          echo -e "Current repository files:"
+          ls -lhart repo/${{ env.ALPINE_VERSION_SLUG }}/${{ env.PHP_VERSION_SLUG }}/x86_64
 
       # build packages.
       - name: build
@@ -89,15 +92,15 @@ jobs:
           echo -e "${{ secrets.PHP_ALPINE_RSA_PUB }}" > .abuild/php-alpine.rsa.pub
           docker-compose run sandbox builder.sh --build --extra --main --extensions
 
+      # upload artifacts.
+      - name: upload
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ env.PA_BUILD_SLUG }}
+          path: repo/${{ env.PA_BUILD_PATH }}
+
       # publish to bintray.
       - name: bintray
         run: |
           echo -e "Publishing to Bintray"
           ./publish-zip.sh
-
-      # upload artifacts.
-      - name: upload
-        uses: actions/upload-artifact@v2
-        with:
-          name: alpine-v${{ env.ALPINE_VERSION }}-php-${{ env.PHP_VERSION }}
-          path: repo/*${{ env.ALPINE_VERSION }}/php-${{ env.PHP_VERSION }}