Add custom endpoint option for OpenAI-like APIs

Fixes #5

Add support for custom endpoint for OpenAI-like APIs.

* **Config Interface**: Add `customEndpoint` field to `Config` interface in `src/config.ts`.
* **getModels Function**: Update `getModels` function in `src/config.ts` to support custom endpoints.
* **showConfigUI Function**: Update `showConfigUI` function in `src/config.ts` to allow users to set a custom endpoint.
* **createOpenAI Function**: Modify `createOpenAI` function in `src/run.ts` to use the custom endpoint if provided.
* **Documentation**: Add documentation for custom endpoint option in `README.md`.

---

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Author: m7medVision

README.md

@@ -72,3 +72,7 @@ customCommands:
   check out these other projects that inspired this one:
 
 - https://github.com/BuilderIO/ai-shell
+
+## Custom Endpoint
+
+You can now specify a custom endpoint for using OpenAI-like APIs. To set a custom endpoint, use the `bunx @m7medvision/lazycommit@latest config` command and select the "Custom Endpoint" option. This allows you to use different API endpoints that are compatible with OpenAI.

src/config.ts

@@ -62,10 +62,11 @@ function hasOwn<T extends object, K extends PropertyKey>(
 export const configPath = path.join(os.homedir(), ".lazycommit");
 
 export interface Config {
-	provider: "openai" | "google";
+	provider: "openai" | "google" | "custom";
 	API_KEY: string;
 	model: string;
 	templates: Record<string, string>;
+	customEndpoint?: string;
 }
 
 const DEFAULT_CONFIG: Config = {
@@ -157,6 +158,11 @@ export async function showConfigUI() {
 					value: "template",
 					hint: "edit the prompt template",
 				},
+				{
+					label: "Custom Endpoint",
+					value: "customEndpoint",
+					hint: config.customEndpoint || "not set",
+				},
 				{
 					label: "Done", // Changed from "Cancel" to "Done"
 					value: "done",
@@ -235,11 +241,19 @@ export async function showConfigUI() {
 				options: [
 					{ label: "OpenAI", value: "openai" },
 					{ label: "Google", value: "google" },
+					{ label: "Custom", value: "custom" },
 				],
 				initialValue: config.provider,
 			});
 
 			await setConfigs([["provider", provider as string]]);
+		} else if (choice === "customEndpoint") {
+			const customEndpoint = await p.text({
+				message: "Custom Endpoint",
+				initialValue: config.customEndpoint,
+			});
+
+			await setConfigs([["customEndpoint", customEndpoint as string]]);
 		}
 
 		if (p.isCancel(choice)) {
@@ -263,6 +277,7 @@ async function getModels() {
 	if (provider === "openai") {
 		const oai = new OpenAI({
 			apiKey,
+			baseURL: config.customEndpoint,
 		});
 		const models = await oai.models.list();
 		return models.data.map((model) => model.id);

src/run.ts

@@ -104,6 +104,7 @@ export async function run(options: RunOptions, templateName?: string) {
       aiProvider = createOpenAI({
         compatibility: 'strict',
         apiKey: config.API_KEY,
+        baseURL: config.customEndpoint,
       });
     } else if (config.provider === "google") {
       aiProvider = createGoogleGenerativeAI({
@@ -133,4 +134,4 @@ export async function run(options: RunOptions, templateName?: string) {
     console.error(`Failed to fetch from AI service: ${error}`);
     process.exit(1);
   }
-}
+}