egutierrez
ebf246beb0
- dotenv_load: parser .env con no-sobreescritura y soporte de comillas - env_require: os.Getenv con error descriptivo fail-fast - env_require_all: verifica multiples vars y lista todas las faltantes - config_from_env: reflection sobre struct tags env/default/required/secret, 5 tipos soportados - config_from_file: JSON via stdlib, YAML stub con not-implemented - 25 tests unitarios, todos PASS Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
package infra
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import (
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"encoding/json"
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"fmt"
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"os"
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"strings"
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)
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// ConfigFromFile loads configuration from a file into target.
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// The target must be a non-nil pointer to a struct (same as json.Unmarshal).
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//
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// Supported formats:
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// - JSON (.json) — full support via encoding/json
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// - YAML (.yaml, .yml) — stub: returns "not implemented"
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//
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// The format is determined by the file extension (case-insensitive).
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func ConfigFromFile(path string, target any) error {
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lower := strings.ToLower(path)
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switch {
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case strings.HasSuffix(lower, ".json"):
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return loadJSON(path, target)
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case strings.HasSuffix(lower, ".yaml"), strings.HasSuffix(lower, ".yml"):
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return fmt.Errorf("config_from_file: YAML support not implemented; use a JSON file or add gopkg.in/yaml.v3")
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default:
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return fmt.Errorf("config_from_file: unsupported file extension for %q (supported: .json, .yaml, .yml)", path)
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}
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}
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func loadJSON(path string, target any) error {
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data, err := os.ReadFile(path)
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if err != nil {
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return fmt.Errorf("config_from_file: read %q: %w", path, err)
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}
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if err := json.Unmarshal(data, target); err != nil {
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return fmt.Errorf("config_from_file: parse JSON %q: %w", path, err)
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}
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return nil
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}
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