LoadConfig loads the named config file or reports an error. JSON and YAML formatted files are supported, as determined by the file extension ("json" or "yaml" -- "yml" is not supported). If a directory suffixed with ".d" exists (e.g. a file "config.json" and a directory "config.json.d"), then all f
(cfg *config.Config, name string, strict bool)
| 38 | // error, or runs the full routine and returns all accumulated errors at the |
| 39 | // end. |
| 40 | func LoadConfig(cfg *config.Config, name string, strict bool) error { |
| 41 | // This function would probably benefit from some logging, but the logging |
| 42 | // configuration is specified _inside_ the configuration, so it's hard to |
| 43 | // say what should be done here. |
| 44 | name = filepath.Clean(name) |
| 45 | ext := filepath.Ext(name) |
| 46 | switch ext { |
| 47 | case ".yaml": // OK |
| 48 | case ".json": // OK |
| 49 | default: |
| 50 | return fmt.Errorf("unknown config kind %q", ext) |
| 51 | } |
| 52 | var errs []error |
| 53 | |
| 54 | b, err := loadAsJSON(name) |
| 55 | if err != nil { |
| 56 | if strict { |
| 57 | return err |
| 58 | } |
| 59 | errs = append(errs, err) |
| 60 | } |
| 61 | dropinDir := name + ".d" |
| 62 | err = filepath.WalkDir(dropinDir, func(path string, d fs.DirEntry, err error) error { |
| 63 | switch { |
| 64 | case path == dropinDir: |
| 65 | return nil |
| 66 | case !errors.Is(err, nil): |
| 67 | return fmt.Errorf("error walking filesystem: %w", err) |
| 68 | case d.IsDir(): |
| 69 | return fs.SkipDir |
| 70 | } |
| 71 | // After this, make sure everything assigns errors to "err" so that the |
| 72 | // non-strict behavior works. |
| 73 | |
| 74 | var doc []byte |
| 75 | switch dext := filepath.Ext(path); { |
| 76 | case dext == ext: |
| 77 | doc, err = loadAsJSON(path) |
| 78 | if err != nil { |
| 79 | break |
| 80 | } |
| 81 | b, err = jsonpatch.MergePatch(b, doc) |
| 82 | if err != nil { |
| 83 | err = fmt.Errorf("error merging drop-in %q: %w", path, err) |
| 84 | break |
| 85 | } |
| 86 | case dext == ext+"-patch": |
| 87 | doc, err = loadAsJSON(path) |
| 88 | if err != nil { |
| 89 | break |
| 90 | } |
| 91 | var p jsonpatch.Patch |
| 92 | p, err = jsonpatch.DecodePatch(doc) |
| 93 | if err != nil { |
| 94 | err = fmt.Errorf("bad patch %q: %w", path, err) |
| 95 | break |
| 96 | } |
| 97 | b, err = p.Apply(b) |