feature: supports to read OpenAI API key from env (#1748)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Models/OpenAI.cs

@@ -117,6 +117,12 @@ public string ApiKey
             set => SetProperty(ref _apiKey, value);
         }
 
+        public bool ReadApiKeyFromEnv
+        {
+            get => _readApiKeyFromEnv;
+            set => SetProperty(ref _readApiKeyFromEnv, value);
+        }
+
         public string Model
         {
             get => _model;
@@ -176,8 +182,9 @@ Your only goal is to retrieve a single commit message.
 
         public async Task ChatAsync(string prompt, string question, CancellationToken cancellation, Action<string> onUpdate)
         {
+            var finalKey = _readApiKeyFromEnv ? Environment.GetEnvironmentVariable(_apiKey) : _apiKey;
             var server = new Uri(_server);
-            var key = new ApiKeyCredential(_apiKey);
+            var key = new ApiKeyCredential(finalKey);
             var oaiClient = _server.Contains("openai.azure.com/", StringComparison.Ordinal)
                 ? new AzureOpenAIClient(server, key)
                 : new OpenAIClient(key, new() { Endpoint = server });
@@ -220,6 +227,7 @@ public async Task ChatAsync(string prompt, string question, CancellationToken ca
         private string _name;
         private string _server;
         private string _apiKey;
+        private bool _readApiKeyFromEnv = false;
         private string _model;
         private bool _streaming = true;
         private string _analyzeDiffPrompt;

src/Resources/Locales/en_US.axaml

@@ -530,6 +530,7 @@
   <x:String x:Key="Text.Preferences.AI.GenerateSubjectPrompt" xml:space="preserve">Generate Subject Prompt</x:String>
   <x:String x:Key="Text.Preferences.AI.Model" xml:space="preserve">Model</x:String>
   <x:String x:Key="Text.Preferences.AI.Name" xml:space="preserve">Name</x:String>
+  <x:String x:Key="Text.Preferences.AI.ReadApiKeyFromEnv" xml:space="preserve">Entered value is the name to load API key from ENV</x:String>
   <x:String x:Key="Text.Preferences.AI.Server" xml:space="preserve">Server</x:String>
   <x:String x:Key="Text.Preferences.AI.Streaming" xml:space="preserve">Enable Streaming</x:String>
   <x:String x:Key="Text.Preferences.Appearance" xml:space="preserve">APPEARANCE</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -534,6 +534,7 @@
   <x:String x:Key="Text.Preferences.AI.GenerateSubjectPrompt" xml:space="preserve">Generate Subject Prompt</x:String>
   <x:String x:Key="Text.Preferences.AI.Model" xml:space="preserve">模型</x:String>
   <x:String x:Key="Text.Preferences.AI.Name" xml:space="preserve">配置名称</x:String>
+  <x:String x:Key="Text.Preferences.AI.ReadApiKeyFromEnv" xml:space="preserve">从环境变量（填写环境变量名）中读取API密钥</x:String>
   <x:String x:Key="Text.Preferences.AI.Server" xml:space="preserve">服务地址</x:String>
   <x:String x:Key="Text.Preferences.AI.Streaming" xml:space="preserve">启用流式输出</x:String>
   <x:String x:Key="Text.Preferences.Appearance" xml:space="preserve">外观配置</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -534,6 +534,7 @@
   <x:String x:Key="Text.Preferences.AI.GenerateSubjectPrompt" xml:space="preserve">產生提交訊息提示詞</x:String>
   <x:String x:Key="Text.Preferences.AI.Model" xml:space="preserve">模型</x:String>
   <x:String x:Key="Text.Preferences.AI.Name" xml:space="preserve">名稱</x:String>
+  <x:String x:Key="Text.Preferences.AI.ReadApiKeyFromEnv" xml:space="preserve">從環境變數中（輸入為環境變數名稱）載入金鑰</x:String>
   <x:String x:Key="Text.Preferences.AI.Server" xml:space="preserve">伺服器</x:String>
   <x:String x:Key="Text.Preferences.AI.Streaming" xml:space="preserve">啟用串流輸出</x:String>
   <x:String x:Key="Text.Preferences.Appearance" xml:space="preserve">外觀設定</x:String>

src/Views/Preferences.axaml

@@ -788,7 +788,10 @@
                     <TextBox Margin="0,4,0,0" CornerRadius="3" Height="28" Text="{Binding Model, Mode=TwoWay}"/>
 
                     <TextBlock Margin="0,12,0,0" Text="{DynamicResource Text.Preferences.AI.ApiKey}"/>
-                    <TextBox Margin="0,4,0,0" CornerRadius="3" Height="28" Text="{Binding ApiKey, Mode=TwoWay}" PasswordChar="*"/>
+                    <TextBox Margin="0,4,0,0" CornerRadius="3" Height="28" Text="{Binding ApiKey, Mode=TwoWay}" PasswordChar="*" RevealPassword="{Binding ReadApiKeyFromEnv, Mode=OneWay}"/>
+                    <CheckBox Margin="0,4,0,0"
+                              Content="{DynamicResource Text.Preferences.AI.ReadApiKeyFromEnv}"
+                              IsChecked="{Binding ReadApiKeyFromEnv, Mode=TwoWay}"/>
 
                     <TextBlock Margin="0,12,0,0" Text="{DynamicResource Text.Preferences.AI.AnalyzeDiffPrompt}"/>
                     <TextBox Height="120"