Add support for Azure AAD login. Fix some bugs.

kubernetes/lib/kubernetes.rb

@@ -15,6 +15,7 @@
 require 'kubernetes/api_error'
 require 'kubernetes/version'
 require 'kubernetes/configuration'
+require 'kubernetes/loader'
 
 # Configuration
 require 'kubernetes/config/error'

kubernetes/spec/config/kube_config_spec.rb

@@ -202,6 +202,14 @@
         expect(user['authorization']).to eq(TEST_BASIC_TOKEN)
       end
     end
+
+    context 'if azure user' do
+      it 'should return the access token' do
+        user = kube_config.find_user('user_azure')
+
+        expect(user['authorization']).to eq(TEST_AZURE_TOKEN)
+      end
+    end
   end
 
   context '#list_context_names' do

kubernetes/spec/fixtures/config/kube_config_hash.rb

@@ -25,6 +25,7 @@
 TEST_PASSWORD = 'pass'.freeze
 # token for me:pass
 TEST_BASIC_TOKEN = 'Basic bWU6cGFzcw=='.freeze
+TEST_AZURE_TOKEN = 'Bearer some-token'.freeze
 
 TEST_SSL_HOST = 'https://test-host'.freeze
 TEST_CERTIFICATE_AUTH = 'cert-auth'.freeze
@@ -146,6 +147,18 @@
   }
 }.freeze
 
+TEST_USER_AZURE = {
+  'name' => 'user_azure',
+  'user' => {
+    'auth-provider' => {
+      'name' => 'azure',
+      'config' => {
+        'access-token' => 'some-token'
+      }
+    }
+  }
+}.freeze
+
 TEST_KUBE_CONFIG = {
   'current-context' => 'no_user',
   'contexts' => [
@@ -167,6 +180,7 @@
     TEST_USER_SIMPLE_TOKEN_FILE,
     TEST_USER_USER_PASS,
     TEST_USER_CERT_DATA,
-    TEST_USER_CERT_FILE
+    TEST_USER_CERT_FILE,
+    TEST_USER_AZURE
   ]
 }.freeze

kubernetes/src/kubernetes/config/kube_config.rb

@@ -23,6 +23,7 @@
 require 'kubernetes/utils'
 
 module Kubernetes
+  # rubocop:disable ClassLength
   # The KubeConfig class represents configuration based on a YAML
   # representation.
   class KubeConfig
@@ -121,15 +122,20 @@ def load_token_file(user)
       end
     end
 
+    # rubocop:disable AbcSize
     def setup_auth(user)
       # Convert token field to http header
       if user['token']
         user['authorization'] = "Bearer #{user['token']}"
       elsif user['username'] && user['password']
         user_pass = "#{user['username']}:#{user['password']}"
         user['authorization'] = "Basic #{Base64.strict_encode64(user_pass)}"
+      elsif user['auth-provider'] && user['auth-provider']['name'] == 'azure'
+        token = user['auth-provider']['config']['access-token']
+        user['authorization'] = "Bearer #{token}"
       end
     end
+    # rubocop:enable AbcSize
 
     def list_context_names
       config['contexts'].map { |e| e['name'] }
@@ -159,4 +165,5 @@ def find_by_name(list, key, name)
       obj[key].dup
     end
   end
+  # rubocop:enable ClassLength
 end