Module: Legion::LLM::Providers

Includes:
Legion::Logging::Helper
Included in:
Legion::LLM
Defined in:
lib/legion/llm/providers.rb

Constant Summary collapse

SAAS_PROVIDERS = 
%i[bedrock anthropic openai gemini azure].freeze

Instance Method Summary collapse

Instance Method Details

#apply_provider_config(provider, config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 54

def apply_provider_config(provider, config)
  case provider
  when :bedrock
    configure_bedrock(config)
  when :anthropic
    configure_anthropic(config)
  when :openai
    configure_openai(config)
  when :gemini
    configure_gemini(config)
  when :azure
    configure_azure(config)
  when :ollama
    configure_ollama(config)
  else
    log.warn "Unknown LLM provider: #{provider}"
  end
end

#auto_enable_from_resolved_credentials ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 17

def auto_enable_from_resolved_credentials
  settings[:providers].each do |provider, config|
    next if config[:enabled]

    has_creds = case provider
                when :bedrock
                  config[:bearer_token] || (config[:api_key] && config[:secret_key])
                when :azure
                  config[:api_base] && (config[:api_key] || config[:auth_token])
                when :ollama
                  ollama_running?(config)
                else
                  config[:api_key]
                end

    has_creds ||= broker_has_credential?(provider) unless has_creds

    next unless has_creds

    config[:enabled] = true
    log.info "Auto-enabled #{provider} provider (credentials found)"
  end
end

#broker_has_credential?(provider) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/providers.rb', line 241

def broker_has_credential?(provider)
  return false unless defined?(Legion::Identity::Broker)

  case provider
  when :bedrock
    renewer = Legion::Identity::Broker.renewer_for(:aws)
    renewer&.provider.respond_to?(:current_credentials) && !renewer.provider.current_credentials.nil?
  else
    !Legion::Identity::Broker.token_for(provider).nil?
  end
rescue StandardError => e
  handle_exception(e, level: :debug, operation: 'llm.providers.broker_credential_available', provider: provider)
  false
end

#configure_anthropic(config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 108

def configure_anthropic(config)
  api_key = resolve_broker_credential(:anthropic) || config[:api_key]
  return unless api_key

  RubyLLM.configure do |c|
    c.anthropic_api_key = api_key
  end
  log.info 'Configured Anthropic provider'
end

#configure_azure(config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 138

def configure_azure(config)
  api_base = config[:api_base]
  api_key = resolve_broker_credential(:azure) || config[:api_key]
  auth_token = config[:auth_token]
  return unless api_base && (api_key || auth_token)

  RubyLLM.configure do |c|
    c.azure_api_base = api_base
    c.azure_api_key = api_key if api_key
    c.azure_ai_auth_token = auth_token if auth_token
  end
  log.info "Configured Azure AI Foundry provider (#{api_base})"
end

#configure_bedrock(config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 73

def configure_bedrock(config)
  has_sigv4 = config[:api_key] && config[:secret_key]
  has_bearer = config[:bearer_token]

  unless has_sigv4 || has_bearer
    broker_creds = resolve_broker_aws_credentials
    if broker_creds
      has_sigv4 = true
      config = config.merge(
        api_key:       broker_creds.access_key_id,
        secret_key:    broker_creds.secret_access_key,
        session_token: (broker_creds.session_token if broker_creds.respond_to?(:session_token))
      )
    end
  end

  return unless has_sigv4 || has_bearer

  require 'legion/llm/bedrock_bearer_auth' if has_bearer

  RubyLLM.configure do |c|
    if has_bearer
      c.bedrock_bearer_token = config[:bearer_token]
    else
      c.bedrock_api_key = config[:api_key]
      c.bedrock_secret_key = config[:secret_key]
      c.bedrock_session_token = config[:session_token] if config[:session_token]
    end
    c.bedrock_region = config[:region] || 'us-east-2'
  end

  auth_mode = has_bearer ? 'bearer token' : 'SigV4'
  log.info "Configured Bedrock provider (#{config[:region]}, #{auth_mode})"
end

#configure_gemini(config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 128

def configure_gemini(config)
  api_key = resolve_broker_credential(:gemini) || config[:api_key]
  return unless api_key

  RubyLLM.configure do |c|
    c.gemini_api_key = api_key
  end
  log.info 'Configured Gemini provider'
end

#configure_ollama(config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 152

def configure_ollama(config)
  RubyLLM.configure do |c|
    c.ollama_api_base = config[:base_url] if config[:base_url]
  end
  log.info "Configured Ollama provider (#{config[:base_url]})"
end

#configure_openai(config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 118

def configure_openai(config)
  api_key = resolve_broker_credential(:openai) || config[:api_key]
  return unless api_key

  RubyLLM.configure do |c|
    c.openai_api_key = api_key
  end
  log.info 'Configured OpenAI provider'
end

#configure_providers ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 8

def configure_providers
  auto_enable_from_resolved_credentials
  settings[:providers].each do |provider, config|
    next unless config[:enabled]

    apply_provider_config(provider, config)
  end
end

#ollama_running?(config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/providers.rb', line 41

def ollama_running?(config)
  require 'socket'
  url = config[:base_url] || 'http://localhost:11434'
  host_part = url.gsub(%r{^https?://}, '').split(':')
  addr = host_part[0]
  port = (host_part[1] || '11434').to_i
  Socket.tcp(addr, port, connect_timeout: 1).close
  true
rescue StandardError => e
  handle_exception(e, level: :debug, operation: 'llm.providers.ollama_running', base_url: url)
  false
end

#recover_openai_with_codex ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 189

def recover_openai_with_codex
  openai_config = settings.dig(:providers, :openai)
  return unless openai_config.is_a?(Hash) && !openai_config[:enabled]

  token = CodexConfigLoader.read_token
  return unless token

  log.info 'OpenAI disabled — trying Codex auth token as fallback'
  openai_config[:api_key] = token
  configure_openai(openai_config)
  openai_config[:enabled] = true
  verify_single_provider(:openai, openai_config[:default_model], openai_config)
rescue StandardError => e
  handle_exception(e, level: :debug, operation: 'llm.providers.recover_openai_with_codex')
end

#recover_with_alternative_credentials ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 185

def recover_with_alternative_credentials
  recover_openai_with_codex
end

#resolve_broker_aws_credentials ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 229

def resolve_broker_aws_credentials
  return nil unless defined?(Legion::Identity::Broker)

  renewer = Legion::Identity::Broker.renewer_for(:aws)
  return renewer.provider.current_credentials if renewer&.provider.respond_to?(:current_credentials)

  nil
rescue StandardError => e
  handle_exception(e, level: :debug, operation: 'llm.providers.broker_resolve.aws')
  nil
end

#resolve_broker_credential(provider_name) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 220

def resolve_broker_credential(provider_name)
  return nil unless defined?(Legion::Identity::Broker)

  Legion::Identity::Broker.token_for(provider_name)
rescue StandardError => e
  handle_exception(e, level: :debug, operation: "llm.providers.broker_resolve.#{provider_name}")
  nil
end

#verify_providers ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 161

def verify_providers
  settings[:providers].each do |provider, config|
    next unless config[:enabled]
    next unless SAAS_PROVIDERS.include?(provider)

    model = config[:default_model]
    next unless model

    verify_single_provider(provider, model, config)
  end

  recover_with_alternative_credentials

  enabled = settings[:providers].select { |_, c| c.is_a?(Hash) && c[:enabled] }
  if enabled.empty?
    log.error 'No LLM providers available — all providers failed health checks or are disabled. ' \
              'LLM features (chat, inference, embeddings) will not work. ' \
              'Check API keys, network connectivity, and provider configuration.'
  else
    names = enabled.map { |name, c| "#{name}/#{c[:default_model] || 'auto'}" }
    log.info "LLM providers available: #{names.join(', ')}"
  end
end

#verify_single_provider(provider, model, _config) ⇒ Object 



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# File 'lib/legion/llm/providers.rb', line 205

def verify_single_provider(provider, model, _config)
  start_time = Time.now
  RubyLLM.chat(model: model, provider: provider).ask('Respond with only the word: pong')
  elapsed = ((Time.now - start_time) * 1000).round
  log.info "Health check #{provider}/#{model}: OK (#{elapsed}ms)"
rescue RubyLLM::ModelNotFoundError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.verify_single_provider', provider: provider, model: model)
rescue RubyLLM::ForbiddenError => e
  handle_exception(e, level: :debug, operation: 'llm.providers.verify_single_provider', provider: provider, model: model)
rescue StandardError => e
  log.warn "LLM provider (#{provider}) not available, #{e.class}"
  handle_exception(e, level: :debug, operation: 'llm.providers.verify_single_provider', provider: provider, model: model)
  # config[:enabled] = false
end