Adds custom url support for Open AI models (Azure)

Refs: #2743

package.json

@@ -2878,6 +2878,16 @@
 						"scope": "window",
 						"order": 101
 					},
+					"gitlens.ai.experimental.openai.url": {
+						"type": [
+							"string",
+							"null"
+						],
+						"default": null,
+						"markdownDescription": "Specifies a custom URL to use for access to an OpenAI model via Azure. Azure URLs should be in the following format: https://{your-resource-name}.openai.azure.com/openai/deployments/{deployment-id}/chat/completions?api-version={api-version}",
+						"scope": "window",
+						"order": 102
+					},
 					"gitlens.ai.experimental.anthropic.model": {
 						"type": "string",
 						"default": "claude-v1",

src/ai/openaiProvider.ts

@@ -19,6 +19,10 @@ export class OpenAIProvider implements AIProvider {
 
 	dispose() {}
 
+	private get url(): string {
+		return configuration.get('ai.experimental.openai.url') ?? 'https://api.openai.com/v1/chat/completions';
+	}
+
 	async generateCommitMessage(diff: string, options?: { context?: string }): Promise<string | undefined> {
 		const apiKey = await getApiKey(this.container.storage);
 		if (apiKey == null) return undefined;
@@ -64,7 +68,7 @@ export class OpenAIProvider implements AIProvider {
 			content: `Write a meaningful commit message for the following code changes:\n\n${code}`,
 		});
 
-		const rsp = await fetch('https://api.openai.com/v1/chat/completions', {
+		const rsp = await fetch(this.url, {
 			headers: {
 				Accept: 'application/json',
 				Authorization: `Bearer ${apiKey}`,
@@ -126,7 +130,7 @@ export class OpenAIProvider implements AIProvider {
 			],
 		};
 
-		const rsp = await fetch('https://api.openai.com/v1/chat/completions', {
+		const rsp = await fetch(this.url, {
 			headers: {
 				Accept: 'application/json',
 				Authorization: `Bearer ${apiKey}`,

src/config.ts

@@ -9,6 +9,7 @@ export interface Config {
 			provider: 'openai' | 'anthropic';
 			openai: {
 				model?: OpenAIModels;
+				url?: string | null;
 			};
 			anthropic: {
 				model?: AnthropicModels;