clerk/internal/settings/settings.go (view raw)
| 1 | package settings |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "fmt" |
| 6 | "io/fs" |
| 7 | "os" |
| 8 | "strings" |
| 9 | |
| 10 | "github.com/pelletier/go-toml/v2" |
| 11 | |
| 12 | "olexsmir.xyz/clerk/internal/linter" |
| 13 | "olexsmir.xyz/clerk/journal/printer" |
| 14 | ) |
| 15 | |
| 16 | type Settings struct { |
| 17 | // SemanticHighlighting enables LSP semantic tokens. |
| 18 | SemanticHighlighting bool |
| 19 | |
| 20 | // LatinToCyrillicCompletion matches Latin input against Cyrillic labels. |
| 21 | LatinToCyrillicCompletion bool |
| 22 | |
| 23 | Linter linter.Config |
| 24 | Format printer.Config |
| 25 | } |
| 26 | |
| 27 | var DefaultConfig = Settings{ |
| 28 | SemanticHighlighting: true, |
| 29 | LatinToCyrillicCompletion: false, |
| 30 | Linter: linter.DefaultConfig, |
| 31 | Format: printer.DefaultConfig, |
| 32 | } |
| 33 | |
| 34 | // Load reads and parses the TOML config file at path. |
| 35 | // A missing file yields defaults without error. |
| 36 | func Load(fpath string) (Settings, []string, error) { |
| 37 | data, err := os.ReadFile(fpath) |
| 38 | if err != nil { |
| 39 | if errors.Is(err, fs.ErrNotExist) { |
| 40 | return DefaultConfig, nil, nil |
| 41 | } |
| 42 | return DefaultConfig, nil, err |
| 43 | } |
| 44 | var raw map[string]any |
| 45 | if err := toml.Unmarshal(data, &raw); err != nil { |
| 46 | return DefaultConfig, nil, err |
| 47 | } |
| 48 | return parse(raw) |
| 49 | } |
| 50 | |
| 51 | func parse(raw map[string]any) (settings Settings, warns []string, err error) { |
| 52 | s := DefaultConfig |
| 53 | warns, err = s.Apply(raw) |
| 54 | return s, warns, err |
| 55 | } |
| 56 | |
| 57 | // Apply merges settings from a config file into s. |
| 58 | func (s *Settings) Apply(raw map[string]any) ([]string, error) { |
| 59 | return applyMap(raw, s.applyFileField) |
| 60 | } |
| 61 | |
| 62 | func (s *Settings) applyFileField(name string, val any) ([]string, error) { |
| 63 | switch normalizeKey(name) { |
| 64 | case "lint": |
| 65 | return s.setLint(val) |
| 66 | case "format": |
| 67 | return s.setFormat(val) |
| 68 | default: |
| 69 | return []string{fmt.Sprintf("unknown setting %q", name)}, nil |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | // ApplyLSP merges settings from the LSP server configuration into s. |
| 74 | func (s *Settings) ApplyLSP(raw map[string]any) ([]string, error) { |
| 75 | return applyMap(raw, s.applyLSPField) |
| 76 | } |
| 77 | |
| 78 | func (s *Settings) applyLSPField(name string, val any) ([]string, error) { |
| 79 | switch normalizeKey(name) { |
| 80 | case "semantic_highlighting": |
| 81 | return nil, setBool(&s.SemanticHighlighting, val) |
| 82 | case "latin_to_cyrillic_completion": |
| 83 | return nil, setBool(&s.LatinToCyrillicCompletion, val) |
| 84 | default: |
| 85 | return s.applyFileField(name, val) |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | func applyMap(m map[string]any, fn func(k string, val any) ([]string, error)) ([]string, error) { |
| 90 | count := make(map[string]int, len(m)) |
| 91 | for k := range m { |
| 92 | count[normalizeKey(k)]++ |
| 93 | } |
| 94 | var ( |
| 95 | warns []string |
| 96 | errs []error |
| 97 | ) |
| 98 | for k, val := range m { |
| 99 | norm := normalizeKey(k) |
| 100 | if count[norm] > 1 { |
| 101 | errs = append(errs, fmt.Errorf("%s: duplicate setting %q not applied", k, norm)) |
| 102 | continue |
| 103 | } |
| 104 | ws, err := fn(k, val) |
| 105 | warns = append(warns, ws...) |
| 106 | if err != nil { |
| 107 | errs = append(errs, prefixLines(k, err)) |
| 108 | } |
| 109 | } |
| 110 | return warns, errors.Join(errs...) |
| 111 | } |
| 112 | |
| 113 | func applyTable(v any, fn func(k string, val any) ([]string, error)) ([]string, error) { |
| 114 | m, ok := v.(map[string]any) |
| 115 | if !ok { |
| 116 | return nil, fmt.Errorf("invalid value %v (want table)", v) |
| 117 | } |
| 118 | return applyMap(m, fn) |
| 119 | } |
| 120 | |
| 121 | func normalizeKey(s string) string { |
| 122 | // already canonical(lowercase, digits, underscores) |
| 123 | canonical := true |
| 124 | for i := 0; i < len(s); i++ { |
| 125 | c := s[i] |
| 126 | if c != '_' && (c < 'a' || c > 'z') && (c < '0' || c > '9') { |
| 127 | canonical = false |
| 128 | break |
| 129 | } |
| 130 | } |
| 131 | if canonical { |
| 132 | return s |
| 133 | } |
| 134 | |
| 135 | var b strings.Builder |
| 136 | b.Grow(len(s)) |
| 137 | prevLower := false |
| 138 | for i := 0; i < len(s); i++ { |
| 139 | c := s[i] |
| 140 | switch { |
| 141 | case c == '-' || c == '_': |
| 142 | b.WriteByte('_') |
| 143 | prevLower = false |
| 144 | case c >= 'A' && c <= 'Z': |
| 145 | if prevLower { |
| 146 | b.WriteByte('_') |
| 147 | } |
| 148 | b.WriteByte(c + 'a' - 'A') |
| 149 | prevLower = false |
| 150 | case c >= 'a' && c <= 'z': |
| 151 | b.WriteByte(c) |
| 152 | prevLower = true |
| 153 | default: |
| 154 | b.WriteByte(c) |
| 155 | prevLower = false |
| 156 | } |
| 157 | } |
| 158 | return b.String() |
| 159 | } |
| 160 | |
| 161 | func prefixLines(prefix string, err error) error { |
| 162 | lines := strings.Split(err.Error(), "\n") |
| 163 | for i, line := range lines { |
| 164 | if line != "" { |
| 165 | lines[i] = prefix + ": " + line |
| 166 | } |
| 167 | } |
| 168 | return errors.New(strings.Join(lines, "\n")) |
| 169 | } |