Initial commit

src/config/env.ts

@@ -0,0 +1,56 @@
+import { existsSync, readFileSync } from "node:fs";
+import path from "node:path";
+
+export type LlmConfig = {
+  baseUrl: string;
+  apiKey: string;
+  model: string;
+};
+
+export function loadLlmConfig(): LlmConfig {
+  const baseUrl =
+    process.env.OPENAI_BASE_URL ?? "https://api.deepseek.com";
+  const apiKey = process.env.OPENAI_API_KEY ?? "";
+  const model = process.env.OPENAI_MODEL ?? "deepseek-v4-pro";
+
+  if (!apiKey) {
+    throw new Error(
+      "Missing OPENAI_API_KEY. Set it in environment or use --mock for offline demo.",
+    );
+  }
+
+  return { baseUrl, apiKey, model };
+}
+
+export function loadLlmConfigOptional(): LlmConfig | null {
+  const apiKey = process.env.OPENAI_API_KEY;
+  if (!apiKey) return null;
+  return {
+    baseUrl: process.env.OPENAI_BASE_URL ?? "https://api.deepseek.com",
+    apiKey,
+    model: process.env.OPENAI_MODEL ?? "deepseek-v4-pro",
+  };
+}
+
+export function loadDotEnv(cwd = process.cwd()): void {
+  const envPath = path.join(cwd, ".env");
+  if (!existsSync(envPath)) return;
+
+  const content = readFileSync(envPath, "utf8");
+  for (const line of content.split(/\r?\n/)) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith("#")) continue;
+    const eq = trimmed.indexOf("=");
+    if (eq <= 0) continue;
+    const key = trimmed.slice(0, eq).trim();
+    if (process.env[key] !== undefined) continue;
+    let value = trimmed.slice(eq + 1).trim();
+    if (
+      (value.startsWith('"') && value.endsWith('"')) ||
+      (value.startsWith("'") && value.endsWith("'"))
+    ) {
+      value = value.slice(1, -1);
+    }
+    process.env[key] = value;
+  }
+}