| 1 | package config |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "os" |
| 6 | "slices" |
| 7 | "sort" |
| 8 | "strconv" |
| 9 | "strings" |
| 10 | |
| 11 | "github.com/BurntSushi/toml" |
| 12 | |
| 13 | "reasonix/internal/fileutil" |
| 14 | fileencoding "reasonix/internal/fileutil/encoding" |
| 15 | ) |
| 16 | |
| 17 | // repairProviderEndpointContractsFileLocked performs a narrow lexical edit for |
| 18 | // a caller that already owns LockConfigFileEdits. It preserves comments, |
| 19 | // unknown provider fields, inline tables, encoding and file permissions. |
| 20 | func repairProviderEndpointContractsFileLocked(path string) ([]ProviderEndpointRepair, error) { |
| 21 | resolved, exists, err := statConfigPath(path) |
| 22 | if err != nil || !exists { |
| 23 | return nil, err |
| 24 | } |
| 25 | info, err := os.Stat(resolved) |
| 26 | if err != nil { |
| 27 | return nil, err |
| 28 | } |
| 29 | rawBytes, err := os.ReadFile(resolved) |
| 30 | if err != nil { |
| 31 | return nil, err |
| 32 | } |
| 33 | encoding, detected := fileencoding.Detect(rawBytes) |
| 34 | raw := fileencoding.Decode(detected, encoding) |
| 35 | next, repairs, err := rewriteProviderEndpointContracts(string(raw)) |
| 36 | if err != nil || len(repairs) == 0 { |
| 37 | return repairs, err |
| 38 | } |
| 39 | encoded, err := fileencoding.Encode(next, encoding) |
| 40 | if err != nil { |
| 41 | return nil, err |
| 42 | } |
| 43 | if err := fileutil.AtomicWriteFile(resolved, encoded, info.Mode().Perm()); err != nil { |
| 44 | return nil, err |
| 45 | } |
| 46 | return repairs, nil |
| 47 | } |
| 48 | |
| 49 | func rewriteProviderEndpointContracts(raw string) (string, []ProviderEndpointRepair, error) { |
| 50 | var decoded struct { |
| 51 | Providers []ProviderEntry `toml:"providers"` |
| 52 | } |
| 53 | if _, err := toml.Decode(raw, &decoded); err != nil { |
| 54 | return raw, nil, err |
| 55 | } |
| 56 | repairs := make([]ProviderEndpointRepair, 0) |
| 57 | repaired := make([]bool, len(decoded.Providers)) |
| 58 | for i := range decoded.Providers { |
| 59 | if repair, changed := RepairProviderEndpointContract(&decoded.Providers[i]); changed { |
| 60 | repairs = append(repairs, *repair) |
| 61 | repaired[i] = true |
| 62 | } |
| 63 | } |
| 64 | if len(repairs) == 0 { |
| 65 | return raw, nil, nil |
| 66 | } |
| 67 | |
| 68 | lines := strings.Split(raw, "\n") |
| 69 | blocks := providerTOMLBlocks(lines) |
| 70 | if len(blocks) == len(decoded.Providers) { |
| 71 | var err error |
| 72 | for i := range slices.Backward(decoded.Providers) { |
| 73 | if !repaired[i] { |
| 74 | continue |
| 75 | } |
| 76 | lines, err = rewriteProviderEndpointBlock(lines, blocks[i], decoded.Providers[i]) |
| 77 | if err != nil { |
| 78 | return raw, nil, err |
| 79 | } |
| 80 | } |
| 81 | return strings.Join(lines, "\n"), repairs, nil |
| 82 | } |
| 83 | |
| 84 | inlineBlocks, err := providerTOMLInlineBlocks(raw) |
| 85 | if err != nil || len(inlineBlocks) != len(decoded.Providers) { |
| 86 | return raw, nil, fmt.Errorf("repair provider endpoint: could not map provider tables safely") |
| 87 | } |
| 88 | replacements := make([]tomlReplacement, 0, len(repairs)*7) |
| 89 | for i := range decoded.Providers { |
| 90 | if !repaired[i] { |
| 91 | continue |
| 92 | } |
| 93 | blockReplacements, err := providerEndpointInlineReplacements(raw, inlineBlocks[i], decoded.Providers[i]) |
| 94 | if err != nil { |
| 95 | return raw, nil, err |
| 96 | } |
| 97 | replacements = append(replacements, blockReplacements...) |
| 98 | } |
| 99 | return applyTOMLReplacements(raw, replacements), repairs, nil |
| 100 | } |
| 101 | |
| 102 | func rewriteProviderEndpointBlock(lines []string, block providerTOMLBlock, entry ProviderEntry) ([]string, error) { |
| 103 | foundKind, foundBase := false, false |
| 104 | foundAuth, foundMode := false, false |
| 105 | state := tomlOutside |
| 106 | for i := block.start + 1; i < block.end; i++ { |
| 107 | if state != tomlOutside { |
| 108 | state = advanceTOMLStringState(state, lines[i]) |
| 109 | continue |
| 110 | } |
| 111 | nextState := advanceTOMLStringState(tomlOutside, lines[i]) |
| 112 | if nextState != tomlOutside { |
| 113 | state = nextState |
| 114 | continue |
| 115 | } |
| 116 | key, _, ok := tomlKeyValue(lines[i]) |
| 117 | if !ok { |
| 118 | state = nextState |
| 119 | continue |
| 120 | } |
| 121 | switch strings.Trim(key, `"'`) { |
| 122 | case "kind": |
| 123 | lines[i] = replaceTOMLStringAssignment(lines[i], entry.Kind) |
| 124 | foundKind = true |
| 125 | case "base_url": |
| 126 | lines[i] = replaceTOMLStringAssignment(lines[i], entry.BaseURL) |
| 127 | foundBase = true |
| 128 | case "request_url", "chat_url": |
| 129 | lines[i] = replaceTOMLStringAssignment(lines[i], "") |
| 130 | case "auth_header": |
| 131 | lines[i] = replaceTOMLScalarAssignment(lines[i], strconv.FormatBool(entry.AuthHeader)) |
| 132 | foundAuth = true |
| 133 | case "responses_mode": |
| 134 | foundMode = true |
| 135 | if entry.Kind == "responses" && entry.ResponsesMode != "" { |
| 136 | lines[i] = replaceTOMLStringAssignment(lines[i], entry.ResponsesMode) |
| 137 | } else { |
| 138 | lines[i] = preservedTOMLLineComment(lines[i]) |
| 139 | } |
| 140 | case "responses_stateful": |
| 141 | lines[i] = preservedTOMLLineComment(lines[i]) |
| 142 | } |
| 143 | state = nextState |
| 144 | } |
| 145 | insert := make([]string, 0, 4) |
| 146 | if !foundKind { |
| 147 | insert = append(insert, "kind = "+strconv.Quote(entry.Kind)) |
| 148 | } |
| 149 | if !foundBase { |
| 150 | insert = append(insert, "base_url = "+strconv.Quote(entry.BaseURL)) |
| 151 | } |
| 152 | if entry.AuthHeader && !foundAuth { |
| 153 | insert = append(insert, "auth_header = true") |
| 154 | } |
| 155 | if entry.Kind == "responses" && entry.ResponsesMode != "" && !foundMode { |
| 156 | insert = append(insert, "responses_mode = "+strconv.Quote(entry.ResponsesMode)) |
| 157 | } |
| 158 | if len(insert) == 0 { |
| 159 | return lines, nil |
| 160 | } |
| 161 | if block.end > 0 && strings.HasSuffix(lines[block.end-1], "\r") { |
| 162 | for i := range insert { |
| 163 | insert[i] += "\r" |
| 164 | } |
| 165 | } |
| 166 | lines = append(lines, make([]string, len(insert))...) |
| 167 | copy(lines[block.end+len(insert):], lines[block.end:len(lines)-len(insert)]) |
| 168 | copy(lines[block.end:], insert) |
| 169 | return lines, nil |
| 170 | } |
| 171 | |
| 172 | func preservedTOMLLineComment(line string) string { |
| 173 | carriageReturn := strings.HasSuffix(line, "\r") |
| 174 | line = strings.TrimSuffix(line, "\r") |
| 175 | comment := tomlInlineCommentIndex(line) |
| 176 | if comment < 0 { |
| 177 | if carriageReturn { |
| 178 | return "\r" |
| 179 | } |
| 180 | return "" |
| 181 | } |
| 182 | indentLen := len(line) - len(strings.TrimLeft(line, " \t")) |
| 183 | next := line[:indentLen] + strings.TrimLeft(line[comment:], " \t") |
| 184 | if carriageReturn { |
| 185 | next += "\r" |
| 186 | } |
| 187 | return next |
| 188 | } |
| 189 | |
| 190 | func providerEndpointInlineReplacements(raw string, block providerTOMLInlineBlock, entry ProviderEntry) ([]tomlReplacement, error) { |
| 191 | removeKeys := map[string]bool{"responses_stateful": true} |
| 192 | if entry.Kind != "responses" || entry.ResponsesMode == "" { |
| 193 | removeKeys["responses_mode"] = true |
| 194 | } |
| 195 | replacements := make([]tomlReplacement, 0, 8) |
| 196 | if kind, ok := block.fields["kind"]; ok { |
| 197 | replacements = append(replacements, tomlReplacement{start: kind.valueStart, end: kind.valueEnd, value: strconv.Quote(entry.Kind)}) |
| 198 | } |
| 199 | if base, ok := block.fields["base_url"]; ok { |
| 200 | replacements = append(replacements, tomlReplacement{start: base.valueStart, end: base.valueEnd, value: strconv.Quote(entry.BaseURL)}) |
| 201 | } |
| 202 | for _, key := range []string{"request_url", "chat_url"} { |
| 203 | if field, ok := block.fields[key]; ok { |
| 204 | replacements = append(replacements, tomlReplacement{start: field.valueStart, end: field.valueEnd, value: strconv.Quote("")}) |
| 205 | } |
| 206 | } |
| 207 | if field, ok := block.fields["auth_header"]; ok { |
| 208 | replacements = append(replacements, tomlReplacement{start: field.valueStart, end: field.valueEnd, value: strconv.FormatBool(entry.AuthHeader)}) |
| 209 | } |
| 210 | if field, ok := block.fields["responses_mode"]; ok && !removeKeys["responses_mode"] { |
| 211 | replacements = append(replacements, tomlReplacement{start: field.valueStart, end: field.valueEnd, value: strconv.Quote(entry.ResponsesMode)}) |
| 212 | } |
| 213 | replacements = append(replacements, inlineProviderFieldRemovals(block, removeKeys)...) |
| 214 | |
| 215 | var additions []string |
| 216 | if _, ok := block.fields["kind"]; !ok { |
| 217 | additions = append(additions, "kind = "+strconv.Quote(entry.Kind)) |
| 218 | } |
| 219 | if _, ok := block.fields["base_url"]; !ok { |
| 220 | additions = append(additions, "base_url = "+strconv.Quote(entry.BaseURL)) |
| 221 | } |
| 222 | if entry.AuthHeader { |
| 223 | if _, ok := block.fields["auth_header"]; !ok { |
| 224 | additions = append(additions, "auth_header = true") |
| 225 | } |
| 226 | } |
| 227 | if entry.Kind == "responses" && entry.ResponsesMode != "" { |
| 228 | if _, ok := block.fields["responses_mode"]; !ok { |
| 229 | additions = append(additions, "responses_mode = "+strconv.Quote(entry.ResponsesMode)) |
| 230 | } |
| 231 | } |
| 232 | if len(additions) > 0 { |
| 233 | replacements = append(replacements, tomlReplacement{ |
| 234 | start: block.end, |
| 235 | end: block.end, |
| 236 | value: ", " + strings.Join(additions, ", "), |
| 237 | }) |
| 238 | } |
| 239 | return replacements, nil |
| 240 | } |
| 241 | |
| 242 | func inlineProviderFieldRemovals(block providerTOMLInlineBlock, removeKeys map[string]bool) []tomlReplacement { |
| 243 | indexSet := make(map[int]bool) |
| 244 | for key := range removeKeys { |
| 245 | if field, ok := block.fields[key]; ok { |
| 246 | indexSet[field.segment] = true |
| 247 | } |
| 248 | } |
| 249 | if len(indexSet) == 0 { |
| 250 | return nil |
| 251 | } |
| 252 | indexes := make([]int, 0, len(indexSet)) |
| 253 | for index := range indexSet { |
| 254 | indexes = append(indexes, index) |
| 255 | } |
| 256 | sort.Ints(indexes) |
| 257 | var replacements []tomlReplacement |
| 258 | for pos := 0; pos < len(indexes); { |
| 259 | first, last := indexes[pos], indexes[pos] |
| 260 | for pos+1 < len(indexes) && indexes[pos+1] == last+1 { |
| 261 | pos++ |
| 262 | last = indexes[pos] |
| 263 | } |
| 264 | var start, end int |
| 265 | if last < len(block.segments)-1 { |
| 266 | start = block.segments[first][0] |
| 267 | end = block.segments[last+1][0] |
| 268 | } else if first > 0 { |
| 269 | start = block.segments[first-1][1] |
| 270 | end = block.segments[last][1] |
| 271 | } |
| 272 | if end > start { |
| 273 | replacements = append(replacements, tomlReplacement{start: start, end: end}) |
| 274 | } |
| 275 | pos++ |
| 276 | } |
| 277 | return replacements |
| 278 | } |
| 279 |