123 lines
2.9 KiB
Go
123 lines
2.9 KiB
Go
package config
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import (
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"errors"
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"fmt"
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"os"
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)
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type Environment int
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const (
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EnvDevelopment Environment = iota
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EnvProduction
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)
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type FileStore int
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const (
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FileSystemStore = iota
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S3Store
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)
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type Config struct {
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Environment Environment
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BindAddr string
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TLSCertFile string
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TLSKeyFile string
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DatabaseURL string
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FileStore FileStore
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FileStoreHTTPRoot string
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AWSAccessKeyID string
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AWSSecretAccessKey string
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AWSRegion string
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S3Bucket string
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AssetsHTTPRoot string
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}
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func NewFromEnv() (Config, error) {
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envString := os.Getenv("ENV")
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var env Environment
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switch envString {
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case "production":
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env = EnvProduction
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case "development":
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env = EnvDevelopment
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case "":
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return Config{}, errors.New("ENV not set")
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default:
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return Config{}, fmt.Errorf("invalid ENV value: %s", envString)
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}
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bindAddr := os.Getenv("BIND_ADDR")
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if bindAddr == "" {
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bindAddr = "localhost:8888"
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}
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tlsCertFile := os.Getenv("TLS_CERT_FILE")
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tlsKeyFile := os.Getenv("TLS_KEY_FILE")
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if (tlsCertFile == "" && tlsKeyFile != "") || (tlsCertFile != "" && tlsKeyFile == "") {
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return Config{}, errors.New("both TLS_CERT_FILE and TLS_KEY_FILE must be set")
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}
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databaseURL := os.Getenv("DATABASE_URL")
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if databaseURL == "" {
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return Config{}, errors.New("DATABASE_URL not set")
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}
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fileStoreString := os.Getenv("FILE_STORE")
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var fileStore FileStore
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switch os.Getenv("FILE_STORE") {
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case "s3":
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fileStore = S3Store
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case "filesystem", "":
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fileStore = FileSystemStore
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default:
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return Config{}, fmt.Errorf("invalid FILE_STORE value: %s", fileStoreString)
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}
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var awsAccessKeyID, awsSecretAccessKey, awsRegion, s3Bucket, fileStoreHTTPRoot string
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if fileStore == S3Store {
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awsAccessKeyID = os.Getenv("AWS_ACCESS_KEY_ID")
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if awsAccessKeyID == "" {
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return Config{}, errors.New("AWS_ACCESS_KEY_ID not set")
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}
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awsSecretAccessKey = os.Getenv("AWS_SECRET_ACCESS_KEY")
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if awsSecretAccessKey == "" {
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return Config{}, errors.New("AWS_SECRET_ACCESS_KEY not set")
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}
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awsRegion = os.Getenv("AWS_REGION")
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if awsRegion == "" {
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return Config{}, errors.New("AWS_REGION not set")
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}
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s3Bucket = os.Getenv("S3_BUCKET")
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if s3Bucket == "" {
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return Config{}, errors.New("S3_BUCKET not set")
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}
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} else {
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if fileStoreHTTPRoot = os.Getenv("FILE_STORE_HTTP_ROOT"); fileStoreHTTPRoot == "" {
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return Config{}, errors.New("FILE_STORE_HTTP_ROOT not set")
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}
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}
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assetsHTTPRoot := os.Getenv("ASSETS_HTTP_ROOT")
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return Config{
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Environment: env,
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BindAddr: bindAddr,
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TLSCertFile: tlsCertFile,
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TLSKeyFile: tlsKeyFile,
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DatabaseURL: databaseURL,
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FileStore: fileStore,
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AWSAccessKeyID: awsAccessKeyID,
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AWSSecretAccessKey: awsSecretAccessKey,
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AWSRegion: awsRegion,
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S3Bucket: s3Bucket,
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AssetsHTTPRoot: assetsHTTPRoot,
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FileStoreHTTPRoot: fileStoreHTTPRoot,
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}, nil
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}
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