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fix(ai): cache vertex adc credentials file check

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Anton Kuzmenko 2026-01-04 17:16:40 -08:00
parent a3f30e085a
commit 63093bf7e4
2 changed files with 13 additions and 3 deletions
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2
packages/ai/CHANGELOG.md
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@ -4,7 +4,7 @@
### Fixed ### Fixed
- Vertex AI dummy value for `getEnvApiKey()`: Returns `"<authenticated>"` when Application Default Credentials are configured (`~/.config/gcloud/application_default_credentials.json` exists) and both `GOOGLE_CLOUD_PROJECT` (or `GCLOUD_PROJECT`) and `GOOGLE_CLOUD_LOCATION` are set. This allows `streamSimple()` to work with Vertex AI without explicit `apiKey` option. - Vertex AI dummy value for `getEnvApiKey()`: Returns `"<authenticated>"` when Application Default Credentials are configured (`~/.config/gcloud/application_default_credentials.json` exists) and both `GOOGLE_CLOUD_PROJECT` (or `GCLOUD_PROJECT`) and `GOOGLE_CLOUD_LOCATION` are set. This allows `streamSimple()` to work with Vertex AI without explicit `apiKey` option. The ADC credentials file existence check is cached per-process to avoid repeated filesystem access.
## [0.34.2] - 2026-01-04 ## [0.34.2] - 2026-01-04

14
packages/ai/src/stream.ts
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@ -24,6 +24,17 @@ import type {
SimpleStreamOptions, SimpleStreamOptions,
} from "./types.js"; } from "./types.js";
const VERTEX_ADC_CREDENTIALS_PATH = join(homedir(), ".config", "gcloud", "application_default_credentials.json");
let cachedVertexAdcCredentialsExists: boolean | null = null;
function hasVertexAdcCredentials(): boolean {
if (cachedVertexAdcCredentialsExists === null) {
cachedVertexAdcCredentialsExists = existsSync(VERTEX_ADC_CREDENTIALS_PATH);
}
return cachedVertexAdcCredentialsExists;
}
/** /**
* Get API key for provider from known environment variables, e.g. OPENAI_API_KEY. * Get API key for provider from known environment variables, e.g. OPENAI_API_KEY.
* *
@ -45,8 +56,7 @@ export function getEnvApiKey(provider: any): string | undefined {
// Vertex AI uses Application Default Credentials, not API keys. // Vertex AI uses Application Default Credentials, not API keys.
// Auth is configured via `gcloud auth application-default login`. // Auth is configured via `gcloud auth application-default login`.
if (provider === "google-vertex") { if (provider === "google-vertex") {
const credentialsPath = join(homedir(), ".config", "gcloud", "application_default_credentials.json"); const hasCredentials = hasVertexAdcCredentials();
const hasCredentials = existsSync(credentialsPath);
const hasProject = !!(process.env.GOOGLE_CLOUD_PROJECT || process.env.GCLOUD_PROJECT); const hasProject = !!(process.env.GOOGLE_CLOUD_PROJECT || process.env.GCLOUD_PROJECT);
const hasLocation = !!process.env.GOOGLE_CLOUD_LOCATION; const hasLocation = !!process.env.GOOGLE_CLOUD_LOCATION;