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417//! LLM driver implementations.
//!
//! Contains drivers for Anthropic Claude, Google Gemini, OpenAI-compatible APIs, and more.
//! Supports: Anthropic, Gemini, OpenAI, Groq, OpenRouter, DeepSeek, Together,
//! Mistral, Fireworks, Ollama, vLLM, and any OpenAI-compatible endpoint.
pub mod anthropic;
pub mod copilot;
pub mod fallback;
pub mod gemini;
pub mod openai;
use crate::llm_driver::{DriverConfig, LlmDriver, LlmError};
use openfang_types::model_catalog::{
AI21_BASE_URL, ANTHROPIC_BASE_URL, CEREBRAS_BASE_URL, COHERE_BASE_URL, DEEPSEEK_BASE_URL,
FIREWORKS_BASE_URL, GEMINI_BASE_URL, GROQ_BASE_URL, HUGGINGFACE_BASE_URL, LMSTUDIO_BASE_URL,
MISTRAL_BASE_URL, OLLAMA_BASE_URL, OPENAI_BASE_URL, OPENROUTER_BASE_URL, PERPLEXITY_BASE_URL,
REPLICATE_BASE_URL, SAMBANOVA_BASE_URL, TOGETHER_BASE_URL, VLLM_BASE_URL, XAI_BASE_URL,
};
use std::sync::Arc;
/// Provider metadata: base URL and env var name for the API key.
struct ProviderDefaults {
base_url: &'static str,
api_key_env: &'static str,
/// If true, the API key is required (error if missing).
key_required: bool,
}
/// Get defaults for known providers.
fn provider_defaults(provider: &str) -> Option<ProviderDefaults> {
match provider {
"groq" => Some(ProviderDefaults {
base_url: GROQ_BASE_URL,
api_key_env: "GROQ_API_KEY",
key_required: true,
}),
"openrouter" => Some(ProviderDefaults {
base_url: OPENROUTER_BASE_URL,
api_key_env: "OPENROUTER_API_KEY",
key_required: true,
}),
"deepseek" => Some(ProviderDefaults {
base_url: DEEPSEEK_BASE_URL,
api_key_env: "DEEPSEEK_API_KEY",
key_required: true,
}),
"together" => Some(ProviderDefaults {
base_url: TOGETHER_BASE_URL,
api_key_env: "TOGETHER_API_KEY",
key_required: true,
}),
"mistral" => Some(ProviderDefaults {
base_url: MISTRAL_BASE_URL,
api_key_env: "MISTRAL_API_KEY",
key_required: true,
}),
"fireworks" => Some(ProviderDefaults {
base_url: FIREWORKS_BASE_URL,
api_key_env: "FIREWORKS_API_KEY",
key_required: true,
}),
"openai" => Some(ProviderDefaults {
base_url: OPENAI_BASE_URL,
api_key_env: "OPENAI_API_KEY",
key_required: true,
}),
"gemini" | "google" => Some(ProviderDefaults {
base_url: GEMINI_BASE_URL,
api_key_env: "GEMINI_API_KEY",
key_required: true,
}),
"ollama" => Some(ProviderDefaults {
base_url: OLLAMA_BASE_URL,
api_key_env: "OLLAMA_API_KEY",
key_required: false,
}),
"vllm" => Some(ProviderDefaults {
base_url: VLLM_BASE_URL,
api_key_env: "VLLM_API_KEY",
key_required: false,
}),
"lmstudio" => Some(ProviderDefaults {
base_url: LMSTUDIO_BASE_URL,
api_key_env: "LMSTUDIO_API_KEY",
key_required: false,
}),
"perplexity" => Some(ProviderDefaults {
base_url: PERPLEXITY_BASE_URL,
api_key_env: "PERPLEXITY_API_KEY",
key_required: true,
}),
"cohere" => Some(ProviderDefaults {
base_url: COHERE_BASE_URL,
api_key_env: "COHERE_API_KEY",
key_required: true,
}),
"ai21" => Some(ProviderDefaults {
base_url: AI21_BASE_URL,
api_key_env: "AI21_API_KEY",
key_required: true,
}),
"cerebras" => Some(ProviderDefaults {
base_url: CEREBRAS_BASE_URL,
api_key_env: "CEREBRAS_API_KEY",
key_required: true,
}),
"sambanova" => Some(ProviderDefaults {
base_url: SAMBANOVA_BASE_URL,
api_key_env: "SAMBANOVA_API_KEY",
key_required: true,
}),
"huggingface" => Some(ProviderDefaults {
base_url: HUGGINGFACE_BASE_URL,
api_key_env: "HF_API_KEY",
key_required: true,
}),
"xai" => Some(ProviderDefaults {
base_url: XAI_BASE_URL,
api_key_env: "XAI_API_KEY",
key_required: true,
}),
"replicate" => Some(ProviderDefaults {
base_url: REPLICATE_BASE_URL,
api_key_env: "REPLICATE_API_TOKEN",
key_required: true,
}),
"github-copilot" | "copilot" => Some(ProviderDefaults {
base_url: copilot::GITHUB_COPILOT_BASE_URL,
api_key_env: "GITHUB_TOKEN",
key_required: true,
}),
_ => None,
}
}
/// Create an LLM driver based on provider name and configuration.
///
/// Supported providers:
/// - `anthropic` — Anthropic Claude (Messages API)
/// - `openai` — OpenAI GPT models
/// - `groq` — Groq (ultra-fast inference)
/// - `openrouter` — OpenRouter (multi-model gateway)
/// - `deepseek` — DeepSeek
/// - `together` — Together AI
/// - `mistral` — Mistral AI
/// - `fireworks` — Fireworks AI
/// - `ollama` — Ollama (local)
/// - `vllm` — vLLM (local)
/// - `lmstudio` — LM Studio (local)
/// - `perplexity` — Perplexity AI (search-augmented)
/// - `cohere` — Cohere (Command R)
/// - `ai21` — AI21 Labs (Jamba)
/// - `cerebras` — Cerebras (ultra-fast inference)
/// - `sambanova` — SambaNova
/// - `huggingface` — Hugging Face Inference API
/// - `xai` — xAI (Grok)
/// - `replicate` — Replicate
/// - Any custom provider with `base_url` set uses OpenAI-compatible format
pub fn create_driver(config: &DriverConfig) -> Result<Arc<dyn LlmDriver>, LlmError> {
let provider = config.provider.as_str();
// Anthropic uses a different API format — special case
if provider == "anthropic" {
let api_key = config
.api_key
.clone()
.or_else(|| std::env::var("ANTHROPIC_API_KEY").ok())
.ok_or_else(|| {
LlmError::MissingApiKey("Set ANTHROPIC_API_KEY environment variable".to_string())
})?;
let base_url = config
.base_url
.clone()
.unwrap_or_else(|| ANTHROPIC_BASE_URL.to_string());
return Ok(Arc::new(anthropic::AnthropicDriver::new(api_key, base_url)));
}
// Gemini uses a different API format — special case
if provider == "gemini" || provider == "google" {
let api_key = config
.api_key
.clone()
.or_else(|| std::env::var("GEMINI_API_KEY").ok())
.or_else(|| std::env::var("GOOGLE_API_KEY").ok())
.ok_or_else(|| {
LlmError::MissingApiKey(
"Set GEMINI_API_KEY or GOOGLE_API_KEY environment variable".to_string(),
)
})?;
let base_url = config
.base_url
.clone()
.unwrap_or_else(|| GEMINI_BASE_URL.to_string());
return Ok(Arc::new(gemini::GeminiDriver::new(api_key, base_url)));
}
// GitHub Copilot — wraps OpenAI-compatible driver with automatic token exchange.
// The CopilotDriver exchanges the GitHub PAT for a Copilot API token on demand,
// caches it, and refreshes when expired.
if provider == "github-copilot" || provider == "copilot" {
let github_token = config
.api_key
.clone()
.or_else(|| std::env::var("GITHUB_TOKEN").ok())
.ok_or_else(|| {
LlmError::MissingApiKey(
"Set GITHUB_TOKEN environment variable for GitHub Copilot".to_string(),
)
})?;
let base_url = config
.base_url
.clone()
.unwrap_or_else(|| copilot::GITHUB_COPILOT_BASE_URL.to_string());
return Ok(Arc::new(copilot::CopilotDriver::new(
github_token,
base_url,
)));
}
// All other providers use OpenAI-compatible format
if let Some(defaults) = provider_defaults(provider) {
let api_key = config
.api_key
.clone()
.or_else(|| std::env::var(defaults.api_key_env).ok())
.unwrap_or_default();
if defaults.key_required && api_key.is_empty() {
return Err(LlmError::MissingApiKey(format!(
"Set {} environment variable for provider '{}'",
defaults.api_key_env, provider
)));
}
let base_url = config
.base_url
.clone()
.unwrap_or_else(|| defaults.base_url.to_string());
return Ok(Arc::new(openai::OpenAIDriver::new(api_key, base_url)));
}
// Unknown provider — if base_url is set, treat as custom OpenAI-compatible
if let Some(ref base_url) = config.base_url {
let api_key = config.api_key.clone().unwrap_or_default();
return Ok(Arc::new(openai::OpenAIDriver::new(
api_key,
base_url.clone(),
)));
}
Err(LlmError::Api {
status: 0,
message: format!(
"Unknown provider '{}'. Supported: anthropic, gemini, openai, groq, openrouter, \
deepseek, together, mistral, fireworks, ollama, vllm, lmstudio, perplexity, \
cohere, ai21, cerebras, sambanova, huggingface, xai, replicate, github-copilot. \
Or set base_url for a custom OpenAI-compatible endpoint.",
provider
),
})
}
/// List all known provider names.
pub fn known_providers() -> &'static [&'static str] {
&[
"anthropic",
"gemini",
"openai",
"groq",
"openrouter",
"deepseek",
"together",
"mistral",
"fireworks",
"ollama",
"vllm",
"lmstudio",
"perplexity",
"cohere",
"ai21",
"cerebras",
"sambanova",
"huggingface",
"xai",
"replicate",
"github-copilot",
]
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_provider_defaults_groq() {
let d = provider_defaults("groq").unwrap();
assert_eq!(d.base_url, "https://api.groq.com/openai/v1");
assert_eq!(d.api_key_env, "GROQ_API_KEY");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_openrouter() {
let d = provider_defaults("openrouter").unwrap();
assert_eq!(d.base_url, "https://openrouter.ai/api/v1");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_ollama() {
let d = provider_defaults("ollama").unwrap();
assert!(!d.key_required);
}
#[test]
fn test_unknown_provider_returns_none() {
assert!(provider_defaults("nonexistent").is_none());
}
#[test]
fn test_custom_provider_with_base_url() {
let config = DriverConfig {
provider: "my-custom-llm".to_string(),
api_key: Some("test".to_string()),
base_url: Some("http://localhost:9999/v1".to_string()),
};
let driver = create_driver(&config);
assert!(driver.is_ok());
}
#[test]
fn test_unknown_provider_no_url_errors() {
let config = DriverConfig {
provider: "nonexistent".to_string(),
api_key: None,
base_url: None,
};
let driver = create_driver(&config);
assert!(driver.is_err());
}
#[test]
fn test_provider_defaults_gemini() {
let d = provider_defaults("gemini").unwrap();
assert_eq!(d.base_url, "https://generativelanguage.googleapis.com");
assert_eq!(d.api_key_env, "GEMINI_API_KEY");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_google_alias() {
let d = provider_defaults("google").unwrap();
assert_eq!(d.base_url, "https://generativelanguage.googleapis.com");
assert!(d.key_required);
}
#[test]
fn test_known_providers_list() {
let providers = known_providers();
assert!(providers.contains(&"groq"));
assert!(providers.contains(&"openrouter"));
assert!(providers.contains(&"anthropic"));
assert!(providers.contains(&"gemini"));
// New providers
assert!(providers.contains(&"perplexity"));
assert!(providers.contains(&"cohere"));
assert!(providers.contains(&"ai21"));
assert!(providers.contains(&"cerebras"));
assert!(providers.contains(&"sambanova"));
assert!(providers.contains(&"huggingface"));
assert!(providers.contains(&"xai"));
assert!(providers.contains(&"replicate"));
assert!(providers.contains(&"github-copilot"));
assert_eq!(providers.len(), 21);
}
#[test]
fn test_provider_defaults_perplexity() {
let d = provider_defaults("perplexity").unwrap();
assert_eq!(d.base_url, "https://api.perplexity.ai");
assert_eq!(d.api_key_env, "PERPLEXITY_API_KEY");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_xai() {
let d = provider_defaults("xai").unwrap();
assert_eq!(d.base_url, "https://api.x.ai/v1");
assert_eq!(d.api_key_env, "XAI_API_KEY");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_cohere() {
let d = provider_defaults("cohere").unwrap();
assert_eq!(d.base_url, "https://api.cohere.com/v2");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_cerebras() {
let d = provider_defaults("cerebras").unwrap();
assert_eq!(d.base_url, "https://api.cerebras.ai/v1");
assert!(d.key_required);
}
#[test]
fn test_provider_defaults_huggingface() {
let d = provider_defaults("huggingface").unwrap();
assert_eq!(d.base_url, "https://api-inference.huggingface.co/v1");
assert_eq!(d.api_key_env, "HF_API_KEY");
assert!(d.key_required);
}
}