73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
package config
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import (
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"fmt"
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"os"
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"gopkg.in/yaml.v3"
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)
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// Config describes the full gateway configuration file.
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type Config struct {
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Server ServerConfig `yaml:"server"`
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Providers ProvidersConfig `yaml:"providers"`
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Auth AuthConfig `yaml:"auth"`
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}
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// AuthConfig holds OIDC authentication settings.
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type AuthConfig struct {
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Enabled bool `yaml:"enabled"`
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Issuer string `yaml:"issuer"`
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Audience string `yaml:"audience"`
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}
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// ServerConfig controls HTTP server values.
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type ServerConfig struct {
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Address string `yaml:"address"`
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}
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// ProvidersConfig wraps supported provider settings.
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type ProvidersConfig struct {
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Google ProviderConfig `yaml:"google"`
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Anthropic ProviderConfig `yaml:"anthropic"`
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OpenAI ProviderConfig `yaml:"openai"`
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}
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// ProviderConfig contains shared provider configuration fields.
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type ProviderConfig struct {
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APIKey string `yaml:"api_key"`
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Model string `yaml:"model"`
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Endpoint string `yaml:"endpoint"`
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}
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// Load reads and parses a YAML configuration file and applies env overrides.
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func Load(path string) (*Config, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("read config: %w", err)
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}
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var cfg Config
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if err := yaml.Unmarshal(data, &cfg); err != nil {
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return nil, fmt.Errorf("parse config: %w", err)
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}
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cfg.applyEnvOverrides()
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return &cfg, nil
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}
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func (cfg *Config) applyEnvOverrides() {
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overrideAPIKey(&cfg.Providers.Google, "GOOGLE_API_KEY")
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overrideAPIKey(&cfg.Providers.Anthropic, "ANTHROPIC_API_KEY")
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overrideAPIKey(&cfg.Providers.OpenAI, "OPENAI_API_KEY")
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}
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func overrideAPIKey(cfg *ProviderConfig, envKey string) {
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if cfg == nil {
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return
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}
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if v := os.Getenv(envKey); v != "" {
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cfg.APIKey = v
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}
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}
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