Bazel remote cache with Azure Storage

bazel-azure-storage-remote-cache.sh

# Interactive read the storage account name
read -p "Storage account name: " STORAGE_ACCOUNT
# Or set variable directly here
# STORAGE_ACCOUNT=azurestorageaccountname
STORAGE_CONTAINER=bazel-cpp-tutorial

ACCESS_TOKEN=$(az account get-access-token \
  --resource="https://${STORAGE_ACCOUNT}.blob.core.windows.net/" \
  --query accessToken --output tsv)

bazel build //... \
  --remote_cache="https://${STORAGE_ACCOUNT}.blob.core.windows.net/${STORAGE_CONTAINER}" \
  --remote_header="Authorization=Bearer ${ACCESS_TOKEN}" \
  --remote_header='x-ms-version=2021-06-08' \
  --remote_header='x-ms-blob-type=BlockBlob' \
  --verbose_failures 

# Can also use the below flag which might make sense for PR or local builds
# --remote_upload_local_results=false

create-storage-account-with-lifecycle-policy.sh

# Use if creating storage account and want to automatically delete old cache data after 30 days of no access

az storage account create \
  --name <storage-account> \
  --location <location> \
  --resource-group <resource-group> \
  --access-tier Hot \
  --https-only true \
  --kind StorageV2 \
  --sku Standard_LRS \
  --min-tls-version TLS1_2 \
  --public-network-access Disabled
  
 az storage account blob-service-properties update \
    --resource-group <resource-group> \
    --account-name <storage-account> \
    --enable-last-access-tracking true
    
az storage account management-policy create \
    --account-name <storage-account> \
    --policy @policy.json \
    --resource-group <resource-group>

policy.json

{
  "rules": [
    {
      "name": "deleteAfterAgingAccess",
      "enabled": true,
      "type": "Lifecycle",
      "definition": {
        "filters": {
          "blobTypes": [
            "blockBlob"
          ],
          "prefixMatch": [
            "sample-container"
          ]
        },
        "actions": {
          "baseBlob": {
            "delete": {
              "daysAfterLastAccessTimeGreaterThan": 30
            }
          }
        }
      }
    }
  ]
}