Initial open-source release

packages/context/src/core/config-reference.ts

@@ -0,0 +1,36 @@
+import { readFileSync } from 'node:fs';
+import { homedir } from 'node:os';
+import { resolve } from 'node:path';
+
+export function resolveKloHomePath(path: string): string {
+  if (path === '~') {
+    return homedir();
+  }
+
+  if (path.startsWith('~/')) {
+    return resolve(homedir(), path.slice(2));
+  }
+
+  return resolve(path);
+}
+
+export function resolveKloConfigReference(value: string | undefined, env: NodeJS.ProcessEnv): string | undefined {
+  if (!value) {
+    return undefined;
+  }
+
+  if (value.startsWith('env:')) {
+    const envName = value.slice('env:'.length).trim();
+    const envValue = env[envName];
+    return envValue && envValue.trim().length > 0 ? envValue.trim() : undefined;
+  }
+
+  if (value.startsWith('file:')) {
+    const filePath = resolveKloHomePath(value.slice('file:'.length).trim());
+    const fileValue = readFileSync(filePath, 'utf8').trim();
+    return fileValue.length > 0 ? fileValue : undefined;
+  }
+
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : undefined;
+}