56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package config
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import (
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"flag"
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"log/slog"
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"os"
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"strconv"
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)
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type Config struct {
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Environment string
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Port int
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OTLPEndpoint string
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DatabaseURL string
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}
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func Load() *Config {
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envFlag := flag.String("env", "development", "environment to use")
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portFlag := flag.Int("port", 8080, "port to listen on")
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otlpEndpointFlag := flag.String("otlp-endpoint", "localhost:4317", "otlp endpoint")
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databaseUrlFlag := flag.String("database-url", "postgres://postgres:postgres@localhost:5432/postgres?sslmode=disable&timezone=utc", "database connection string")
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flag.Parse()
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cfg := &Config{
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Environment: *envFlag,
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Port: *portFlag,
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OTLPEndpoint: *otlpEndpointFlag,
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DatabaseURL: *databaseUrlFlag,
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}
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assignStringFromEnv("DTTMR_ENVIRONMENT", &cfg.Environment)
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assignIntFromEnv("DTTMR_PORT", &cfg.Port)
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assignStringFromEnv("DTTMR_OTLP_ENDPOINT", &cfg.OTLPEndpoint)
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assignStringFromEnv("DTTMR_DATABASE_URL", &cfg.DatabaseURL)
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return cfg
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}
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func assignStringFromEnv(key string, target *string) {
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if val, exists := os.LookupEnv(key); exists {
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*target = val
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}
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}
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func assignIntFromEnv(key string, target *int) {
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if val, exists := os.LookupEnv(key); exists {
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parsed, err := strconv.Atoi(val)
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if err != nil {
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slog.Error("failed to parse environment variable", slog.String("var", key), slog.Any("error", err))
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} else {
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*target = parsed
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}
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}
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}
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