Module: Legion::LLM::Call::Providers

Extended by:
Legion::Logging::Helper
Defined in:
lib/legion/llm/call/providers.rb

Constant Summary collapse

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

Class Method Summary collapse

Class Method Details

.apply_credential_to_config(provider, config, creds) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 370

def apply_credential_to_config(provider, config, creds)
  case provider
  when :bedrock
    config[:bearer_token] = creds[:bearer_token] if creds[:bearer_token]
    config[:api_key]      = creds[:api_key]      if creds[:api_key]
    config[:secret_key]   = creds[:secret_key]   if creds[:secret_key]
  when :anthropic, :openai, :gemini
    config[:api_key] = creds[:api_key]
  end
end

.apply_credential_to_rubyllm(provider, creds, config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 344

def apply_credential_to_rubyllm(provider, creds, config)
  case provider
  when :bedrock
    region = config[:region] || 'us-east-2'
    if creds[:bearer_token]
      require 'legion/llm/call/bedrock_auth'
      RubyLLM.configure do |c|
        c.bedrock_bearer_token = creds[:bearer_token]
        c.bedrock_region = region
      end
    else
      RubyLLM.configure do |c|
        c.bedrock_api_key    = creds[:api_key]
        c.bedrock_secret_key = creds[:secret_key]
        c.bedrock_region     = region
      end
    end
  when :anthropic
    RubyLLM.configure { |c| c.anthropic_api_key = creds[:api_key] }
  when :openai
    RubyLLM.configure { |c| c.openai_api_key = creds[:api_key] }
  when :gemini
    RubyLLM.configure { |c| c.gemini_api_key = creds[:api_key] }
  end
end

.apply_provider_config(provider, config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 131

def apply_provider_config(provider, config)
  case provider
  when :bedrock   then configure_bedrock(config)
  when :anthropic then configure_anthropic(config)
  when :openai    then configure_openai(config)
  when :gemini    then configure_gemini(config)
  when :azure     then configure_azure(config)
  when :ollama    then configure_ollama(config)
  when :vllm then configure_vllm(config)
  else
    log.warn "[llm][providers] unknown provider=#{provider}"
  end
end

.attempt_provider_call(provider, model) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 381

def attempt_provider_call(provider, model)
  start_time = Time.now
  result = probe_via_model_list(provider, model)
  elapsed = ((Time.now - start_time) * 1000).round

  case result
  when :auth_error
    log.warn "[llm][providers] health_check auth_failed provider=#{provider}"
    false
  when :model_missing
    log.warn "[llm][providers] health_check model_missing provider=#{provider} model=#{model} — provider ok, model unavailable"
    false
  else
    log.info "[llm][providers] health_check ok provider=#{provider} model=#{model} elapsed_ms=#{elapsed}"
    true
  end
rescue StandardError => e
  log.warn "[llm][providers] health_check failed provider=#{provider} error=#{e.class}"
  handle_exception(e, level: :warn, operation: 'llm.providers.attempt_provider_call', provider: provider, model: model)
  false
end

.auto_enable_from_resolved_credentials ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 47

def auto_enable_from_resolved_credentials
  log.debug '[llm][providers] auto_enable_from_resolved_credentials.enter'
  Legion::LLM.settings[:providers].each do |provider, config|
    next if config[:enabled]

    has_creds = credential_available_for?(provider, config)
    has_creds ||= broker_has_credential?(provider) unless has_creds

    next unless has_creds

    config[:enabled] = true
    log.info "[llm][providers] auto-enabled provider=#{provider} reason=credentials_found"
  end
end

.auto_register_providers ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 458

def auto_register_providers
  log.debug '[llm][providers] auto_register_providers.enter'
  try_register_native_provider(:claude, 'Legion::Extensions::Claude', 'Legion::Extensions::Claude::Runners::Messages') do |klass|
    Call::Registry.register(:claude, klass)
    Call::Registry.register(:anthropic, klass)
  end
  try_register_native_provider(:bedrock, 'Legion::Extensions::Bedrock', 'Legion::Extensions::Bedrock::Runners::Converse') do |klass|
    Call::Registry.register(:bedrock, klass)
  end
  try_register_native_provider(:openai, 'Legion::Extensions::Openai', 'Legion::Extensions::Openai::Runners::Chat') do |klass|
    Call::Registry.register(:openai, klass)
  end
  try_register_native_provider(:gemini, 'Legion::Extensions::Gemini', 'Legion::Extensions::Gemini::Runners::Generate') do |klass|
    Call::Registry.register(:gemini, klass)
  end

  registered = Call::Registry.available
  if registered.any?
    log.info "[llm][providers] native registry registered=#{registered.join(', ')}"
  else
    log.debug '[llm][providers] no native lex-* providers registered (ruby_llm mode)'
  end
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.auto_register')
end

.broker_has_credential?(provider) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/call/providers.rb', line 523

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: :warn, operation: 'llm.providers.broker_credential_available', provider: provider)
  false
end

.collect_credential_candidates(provider, config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 306

def collect_credential_candidates(provider, config)
  case provider
  when :bedrock
    candidates = []
    resolved_bearer = resolve_credential_value(config[:bearer_token])
    bearer_env = ENV.fetch('AWS_BEARER_TOKEN_BEDROCK', nil)
    claude_bearer = Call::ClaudeConfigLoader.bedrock_bearer_token
    candidates += [resolved_bearer, bearer_env, claude_bearer].compact.uniq.map { |t| { bearer_token: t } }
    api_key = resolve_credential_value(config[:api_key])
    secret = resolve_credential_value(config[:secret_key])
    candidates << { api_key: api_key, secret_key: secret } if api_key && secret
    candidates
  when :anthropic
    [
      resolve_credential_value(config[:api_key]),
      ENV.fetch('ANTHROPIC_API_KEY', nil)
    ].compact.uniq.map { |k| { api_key: k } }
  when :openai
    keys = [
      resolve_credential_value(config[:api_key]),
      ENV.fetch('OPENAI_API_KEY', nil),
      ENV.fetch('CODEX_API_KEY', nil),
      Call::CodexConfigLoader.read_token
    ].compact.uniq
    keys.map { |k| { api_key: k } }
  when :gemini
    [
      resolve_credential_value(config[:api_key]),
      ENV.fetch('GEMINI_API_KEY', nil)
    ].compact.uniq.map { |k| { api_key: k } }
  else
    []
  end
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.collect_credential_candidates', provider: provider)
  []
end

.configure_anthropic(config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 187

def configure_anthropic(config)
  api_key = resolve_broker_credential(:anthropic) ||
            resolve_credential_value(config[:api_key]) ||
            ENV.fetch('ANTHROPIC_API_KEY', nil)
  return unless api_key

  RubyLLM.configure do |c|
    c.anthropic_api_key = api_key
    c.anthropic_api_base = config[:base_url] if config[:base_url]
  end
  log.info "[llm][providers] configured anthropic base_url=#{config[:base_url].inspect}"
end

.configure_azure(config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 227

def configure_azure(config)
  api_base = config[:api_base]
  api_key = resolve_broker_credential(:azure) || resolve_credential_value(config[:api_key])
  auth_token = resolve_credential_value(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 "[llm][providers] configured azure api_base=#{api_base}"
end

.configure_bedrock(config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 145

def configure_bedrock(config)
  resolved_api_key = resolve_credential_value(config[:api_key])
  resolved_secret_key = resolve_credential_value(config[:secret_key])
  resolved_session_token = resolve_credential_value(config[:session_token])
  has_sigv4 = resolved_api_key && resolved_secret_key
  has_bearer = resolve_credential_value(config[:bearer_token])
  config[:bearer_token] = has_bearer if has_bearer
  config[:api_key] = resolved_api_key if resolved_api_key
  config[:secret_key] = resolved_secret_key if resolved_secret_key
  config[:session_token] = resolved_session_token if resolved_session_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/call/bedrock_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 "[llm][providers] configured bedrock region=#{config[:region]} auth=#{auth_mode}"
end

.configure_gemini(config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 214

def configure_gemini(config)
  api_key = resolve_broker_credential(:gemini) ||
            resolve_credential_value(config[:api_key]) ||
            ENV.fetch('GEMINI_API_KEY', nil)
  return unless api_key

  RubyLLM.configure do |c|
    c.gemini_api_key = api_key
    c.gemini_api_base = config[:base_url] if config[:base_url]
  end
  log.info "[llm][providers] configured gemini base_url=#{config[:base_url].inspect}"
end

.configure_ollama(config) ⇒ Object 



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

def configure_ollama(config)
  RubyLLM.configure do |c|
    c.ollama_api_base = config[:base_url] if config[:base_url]
  end
  log.info "[llm][providers] configured ollama base_url=#{config[:base_url].inspect}"
end

.configure_openai(config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 200

def configure_openai(config)
  api_key = resolve_broker_credential(:openai) ||
            resolve_credential_value(config[:api_key]) ||
            ENV.fetch('OPENAI_API_KEY', nil) ||
            ENV.fetch('CODEX_API_KEY', nil)
  return unless api_key

  RubyLLM.configure do |c|
    c.openai_api_key = api_key
    c.openai_api_base = config[:base_url] if config[:base_url]
  end
  log.info "[llm][providers] configured openai base_url=#{config[:base_url].inspect}"
end

.configure_providers ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 35

def configure_providers
  log.debug '[llm][providers] configure_providers.enter'
  auto_enable_from_resolved_credentials
  Legion::LLM.settings[:providers].each do |provider, config|
    next unless config[:enabled]

    log.debug "[llm][providers] configure_providers applying provider=#{provider}"
    apply_provider_config(provider, config)
  end
  log.debug '[llm][providers] configure_providers.exit'
end

.configure_vllm(config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 248

def configure_vllm(config)
  base_url = config[:base_url] || 'http://localhost:8000/v1'
  api_key = resolve_credential_value(config[:api_key])
  RubyLLM.configure do |c|
    c.vllm_api_base = base_url
    c.vllm_api_key = api_key if api_key
  end
  log.info "[llm][providers] configured vllm base_url=#{base_url.inspect}"
end

.credential_available_for?(provider, config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/call/providers.rb', line 62

def credential_available_for?(provider, config)
  case provider
  when :bedrock
    usable_setting?(config[:bearer_token]) ||
      env_present?('AWS_BEARER_TOKEN_BEDROCK') ||
      (usable_setting?(config[:api_key]) && usable_setting?(config[:secret_key]))
  when :anthropic
    usable_setting?(config[:api_key]) || env_present?('ANTHROPIC_API_KEY')
  when :openai
    usable_setting?(config[:api_key]) ||
      env_present?('OPENAI_API_KEY') ||
      env_present?('CODEX_API_KEY') ||
      !Call::CodexConfigLoader.read_token.nil?
  when :azure
    config[:api_base] && (usable_setting?(config[:api_key]) || usable_setting?(config[:auth_token]))
  when :ollama
    ollama_running?(config)
  when :vllm
    vllm_running?(config)
  else
    usable_setting?(config[:api_key])
  end
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.credential_available_for', provider: provider)
  false
end

.env_present?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/call/providers.rb', line 97

def env_present?(key)
  ENV.fetch(key, nil).to_s.strip != ''
end

.inject_anthropic_cache_control!(opts, provider) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 484

def inject_anthropic_cache_control!(opts, provider)
  resolved_provider = (provider || Legion::LLM.settings[:default_provider])&.to_sym
  return unless resolved_provider == :anthropic

  caching_settings = Legion::LLM.settings[:prompt_caching] || {}
  return unless caching_settings[:enabled] != false

  min_tokens = caching_settings[:min_tokens] || 1024
  instructions = opts[:instructions]
  return unless instructions.is_a?(String) && instructions.length > min_tokens

  log.debug "[llm][providers] inject_anthropic_cache_control provider=#{resolved_provider} length=#{instructions.length}"
  opts[:instructions] = {
    content:       instructions,
    cache_control: { type: 'ephemeral' }
  }
end

.ollama_running?(config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/call/providers.rb', line 101

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
  log.debug "[llm][providers] ollama_running? addr=#{addr} port=#{port}"
  Socket.tcp(addr, port, connect_timeout: 1).close
  true
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.ollama_running', base_url: url)
  false
end

.probe_provider_credentials(provider, model, config) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 283

def probe_provider_credentials(provider, model, config)
  candidates = collect_credential_candidates(provider, config)

  if candidates.size <= 1
    ok = attempt_provider_call(provider, model)
    config[:enabled] = false unless ok
    return
  end

  working = candidates.find do |creds|
    apply_credential_to_rubyllm(provider, creds, config)
    attempt_provider_call(provider, model)
  end

  if working
    apply_credential_to_config(provider, config, working)
    log.info "[llm][providers] health_check ok provider=#{provider} model=#{model} credential=#{working.keys.join(',')}"
  else
    config[:enabled] = false
    log.warn "[llm][providers] disabled provider=#{provider} reason=all_credentials_failed"
  end
end

.probe_via_chat(provider, model) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 423

def probe_via_chat(provider, model)
  RubyLLM.chat(model: model, provider: provider).ask('Respond with only the word: pong')
  :ok
rescue RubyLLM::ModelNotFoundError => e
  handle_exception(e, level: :warn, handled: true,
                      operation: 'llm.providers.probe_via_chat.model_missing', provider: provider, model: model)
  :model_missing
rescue RubyLLM::UnauthorizedError, RubyLLM::ForbiddenError => e
  handle_exception(e, level: :warn, handled: true,
                      operation: 'llm.providers.probe_via_chat.auth', provider: provider, model: model)
  :auth_error
end

.probe_via_model_list(provider, target_model) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 403

def probe_via_model_list(provider, target_model)
  provider_class = RubyLLM::Provider.providers[provider.to_sym]
  return probe_via_chat(provider, target_model) unless provider_class

  models = provider_class.new(RubyLLM.config).list_models
  model_ids = models.map { |m| m.is_a?(Hash) ? (m[:id] || m['id']).to_s : m.id.to_s }

  return :ok if target_model.nil?
  return :ok if model_ids.any? { |id| id.include?(target_model) || target_model.include?(id) }

  :model_missing
rescue RubyLLM::UnauthorizedError, RubyLLM::ForbiddenError => e
  handle_exception(e, level: :warn, handled: true,
                      operation: 'llm.providers.probe_via_model_list.auth', provider: provider)
  :auth_error
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.probe_via_model_list', provider: provider)
  probe_via_chat(provider, target_model)
end

.recover_openai_with_codex ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 441

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

  token = Call::CodexConfigLoader.read_token
  return unless token

  log.info '[llm][providers] openai disabled — retrying with codex auth token'
  openai_config[:api_key] = token
  configure_openai(openai_config)
  openai_config[:enabled] = true
  ok = attempt_provider_call(:openai, openai_config[:default_model])
  openai_config[:enabled] = false unless ok
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.recover_openai_with_codex')
end

.recover_with_alternative_credentials ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 436

def recover_with_alternative_credentials
  log.debug '[llm][providers] recover_with_alternative_credentials.enter'
  recover_openai_with_codex
end

.resolve_broker_aws_credentials ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 511

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: :warn, operation: 'llm.providers.broker_resolve.aws')
  nil
end

.resolve_broker_credential(provider_name) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 502

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: :warn, operation: "llm.providers.broker_resolve.#{provider_name}")
  nil
end

.resolve_credential_value(value) ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 93

def resolve_credential_value(value)
  Call::ClaudeConfigLoader.resolve_setting_reference(value)
end

.resolve_llm_secrets ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 25

def resolve_llm_secrets
  log.debug '[llm][providers] resolve_llm_secrets.enter'
  return unless defined?(Legion::Settings::Resolver)

  Legion::Settings::Resolver.resolve_secrets!(Legion::LLM.settings)
  log.debug '[llm][providers] resolve_llm_secrets.exit'
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.resolve_llm_secrets')
end

.setup ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 13

def setup
  log.debug '[llm][providers] setup.enter'
  resolve_llm_secrets
  configure_providers
  verify_providers
  auto_register_providers
  log.debug '[llm][providers] setup.exit'
rescue StandardError => e
  handle_exception(e, level: :error, operation: 'llm.providers.setup')
  raise
end

.try_register_native_provider(name, ext_const, runner_const) {|klass| ... } ⇒ Object

Yields:

  • (klass) 


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# File 'lib/legion/llm/call/providers.rb', line 538

def try_register_native_provider(name, ext_const, runner_const)
  log.debug "[llm][providers] try_register_native_provider name=#{name} ext=#{ext_const}"
  return unless Object.const_defined?(ext_const, false) && Object.const_defined?(runner_const, false)

  klass = Object.const_get(runner_const)
  yield klass
  log.debug "[llm][providers] registered native provider name=#{name}"
end

.usable_setting?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/call/providers.rb', line 89

def usable_setting?(value)
  !resolve_credential_value(value).nil?
end

.verify_providers ⇒ Object 



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# File 'lib/legion/llm/call/providers.rb', line 260

def verify_providers
  log.debug '[llm][providers] verify_providers.enter'
  Legion::LLM.settings[:providers].each do |provider, config|
    next unless config[:enabled]
    next unless SAAS_PROVIDERS.include?(provider)

    model = config[:default_model]
    next unless model

    probe_provider_credentials(provider, model, config)
  end

  recover_with_alternative_credentials

  enabled = Legion::LLM.settings[:providers].select { |_, c| c.is_a?(Hash) && c[:enabled] }
  if enabled.empty?
    log.error '[llm][providers] no providers available — all failed health checks or disabled'
  else
    names = enabled.map { |name, c| "#{name}/#{c[:default_model] || 'auto'}" }
    log.info "[llm][providers] available providers=#{names.join(', ')}"
  end
end

.vllm_running?(config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/llm/call/providers.rb', line 115

def vllm_running?(config)
  require 'faraday'
  url = config[:base_url] || 'http://localhost:8000/v1'
  base = url.sub(%r{/+\z}, '').sub(%r{/v1\z}, '')
  log.debug "[llm][providers] vllm_running? url=#{base}/health"
  response = Faraday.new(url: base) do |f|
    f.options.timeout = 2
    f.options.open_timeout = 2
    f.adapter Faraday.default_adapter
  end.get('/health')
  response.success?
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'llm.providers.vllm_running', base_url: url)
  false
end