Merge pull request #187 from cisagov/improvement/use_setup_packer_action

Use an Action to install Packer in our GitHub Actions workflows

.github/workflows/build.yml

@@ -20,7 +20,6 @@ defaults:
     shell: bash -Eueo pipefail -x {0}
 
 env:
-  CURL_CACHE_DIR: ~/.cache/curl
   PIP_CACHE_DIR: ~/.cache/pip
   PRE_COMMIT_CACHE_DIR: ~/.cache/pre-commit
   RUN_TMATE: ${{ secrets.RUN_TMATE }}
@@ -97,25 +96,12 @@ jobs:
           path: |
             ${{ env.PIP_CACHE_DIR }}
             ${{ env.PRE_COMMIT_CACHE_DIR }}
-            ${{ env.CURL_CACHE_DIR }}
             ${{ steps.go-cache.outputs.dir }}
           restore-keys: |
             ${{ env.BASE_CACHE_KEY }}
-      - name: Setup curl cache
-        run: mkdir -p ${{ env.CURL_CACHE_DIR }}
-      - name: Install Packer
-        env:
-          PACKER_VERSION: ${{ steps.setup-env.outputs.packer-version }}
-        run: |
-          PACKER_ZIP="packer_${PACKER_VERSION}_linux_amd64.zip"
-          curl --output ${{ env.CURL_CACHE_DIR }}/"${PACKER_ZIP}" \
-            --time-cond ${{ env.CURL_CACHE_DIR }}/"${PACKER_ZIP}" \
-            --location \
-            "https://releases.hashicorp.com/packer/${PACKER_VERSION}/${PACKER_ZIP}"
-          sudo unzip -d /opt/packer \
-            ${{ env.CURL_CACHE_DIR }}/"${PACKER_ZIP}"
-          sudo mv /usr/local/bin/packer /usr/local/bin/packer-default
-          sudo ln -s /opt/packer/packer /usr/local/bin/packer
+      - uses: hashicorp/setup-packer@v3
+        with:
+          version: ${{ steps.setup-env.outputs.packer-version }}
       - uses: hashicorp/setup-terraform@v3
         with:
           terraform_version: ${{ steps.setup-env.outputs.terraform-version }}