74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
package config
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import (
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"bufio"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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)
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func LoadEnvDefaults() error {
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if explicit := strings.TrimSpace(os.Getenv("APP_ENV_FILE")); explicit != "" {
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if err := loadEnvFile(explicit); err != nil {
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return fmt.Errorf("load APP_ENV_FILE %s: %w", explicit, err)
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}
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return nil
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}
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for _, candidate := range []string{
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filepath.Join("config", "service.env"),
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filepath.Join("..", "..", "config", "service.env"),
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} {
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if _, err := os.Stat(candidate); err == nil {
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if err := loadEnvFile(candidate); err != nil {
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return fmt.Errorf("load env file %s: %w", candidate, err)
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}
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return nil
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}
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}
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return nil
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}
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func loadEnvFile(path string) error {
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file, err := os.Open(path)
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if err != nil {
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return err
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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lineNo := 0
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for scanner.Scan() {
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lineNo++
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line := strings.TrimSpace(scanner.Text())
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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if strings.HasPrefix(line, "export ") {
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line = strings.TrimSpace(strings.TrimPrefix(line, "export "))
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}
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key, value, found := strings.Cut(line, "=")
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if !found {
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return fmt.Errorf("line %d: missing '='", lineNo)
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}
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key = strings.TrimSpace(key)
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value = strings.TrimSpace(value)
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value = strings.Trim(value, `"'`)
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if key == "" {
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return fmt.Errorf("line %d: empty key", lineNo)
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}
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if _, exists := os.LookupEnv(key); exists {
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continue
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}
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if err := os.Setenv(key, value); err != nil {
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return fmt.Errorf("line %d: set %s: %w", lineNo, key, err)
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}
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}
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if err := scanner.Err(); err != nil {
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return err
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}
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return nil
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}
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