Lazy loading test, readme and changelog

Author: JoeDupuis

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## [Unreleased]
 
+- Allow lazy loading the signer
+
 ## [0.5.4] 2024-11-18
 
 - Allow creating public container

README.md

@@ -95,6 +95,19 @@ client.delete_blob(path)
 
 For the full list of methods: https://www.rubydoc.info/gems/azure-blob/AzureBlob/Client
 
+## options
+
+### Lazy loading
+
+The client is configured to raise an error early for missing credentials, causing it to crash before becoming healthy. This behavior can sometimes be undesirable, such as during assets precompilation.
+
+To enable lazy loading and ignore missing credentials, set the `lazy` option:
+
+`AzureBlob::Client.new(account_name: nil, access_key: nil, container: nil, lazy: true)`
+
+or add `lazy: true` to your `config/storage.yml` for Active Storage.
+
+
 ## Contributing
 
 ### Dev environment

lib/azure_blob/client.rb

@@ -23,6 +23,7 @@ def initialize(account_name:, access_key: nil, principal_id: nil, container:, ho
       @access_key = access_key
       @principal_id = principal_id
       @use_managed_identities = options[:use_managed_identities]
+      signer unless options[:lazy]
     end
 
     # Create a blob of type block. Will automatically split the the blob in multiple block and send the blob in pieces (blocks) if the blob is too big.

test/client/test_client.rb

@@ -66,6 +66,18 @@ def test_without_credentials
     )
   end
 
+  def test_lazy_loading_doesnt_raise_before_querying
+    client = AzureBlob::Client.new(
+      account_name: @account_name,
+      container: @container,
+      lazy: true,
+    )
+
+    assert_raises(AzureBlob::Error) do
+      client.create_block_blob(key, content)
+    end
+  end
+
   def test_single_block_upload
     client.create_block_blob(key, content)