Colin Cross | 8e0c511 | 2015-01-23 14:15:10 -0800 | [diff] [blame] | 1 | // Copyright 2014 Google Inc. All rights reserved. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 15 | package blueprint |
| 16 | |
| 17 | import ( |
Colin Cross | 6134a5c | 2015-02-10 11:26:26 -0800 | [diff] [blame] | 18 | "bytes" |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 19 | "fmt" |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 20 | "io" |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 21 | "strings" |
| 22 | ) |
| 23 | |
Jamie Gennis | 04f106f | 2014-06-12 19:41:57 -0700 | [diff] [blame] | 24 | const eof = -1 |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 25 | |
| 26 | var ( |
| 27 | defaultEscaper = strings.NewReplacer( |
| 28 | "\n", "$\n") |
| 29 | inputEscaper = strings.NewReplacer( |
| 30 | "\n", "$\n", |
| 31 | " ", "$ ") |
| 32 | outputEscaper = strings.NewReplacer( |
| 33 | "\n", "$\n", |
| 34 | " ", "$ ", |
| 35 | ":", "$:") |
| 36 | ) |
| 37 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 38 | type ninjaString interface { |
| 39 | Value(pkgNames map[*packageContext]string) string |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 40 | ValueWithEscaper(w io.StringWriter, pkgNames map[*packageContext]string, escaper *strings.Replacer) |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 41 | Eval(variables map[Variable]ninjaString) (string, error) |
| 42 | Variables() []Variable |
| 43 | } |
| 44 | |
| 45 | type varNinjaString struct { |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 46 | strings []string |
| 47 | variables []Variable |
| 48 | } |
| 49 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 50 | type literalNinjaString string |
| 51 | |
Jamie Gennis | 48aed8c | 2014-06-13 18:25:54 -0700 | [diff] [blame] | 52 | type scope interface { |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 53 | LookupVariable(name string) (Variable, error) |
Jamie Gennis | 48aed8c | 2014-06-13 18:25:54 -0700 | [diff] [blame] | 54 | IsRuleVisible(rule Rule) bool |
| 55 | IsPoolVisible(pool Pool) bool |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 56 | } |
| 57 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 58 | func simpleNinjaString(str string) ninjaString { |
| 59 | return literalNinjaString(str) |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 60 | } |
| 61 | |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 62 | type parseState struct { |
| 63 | scope scope |
| 64 | str string |
Colin Cross | 8de48af | 2017-05-09 10:03:00 -0700 | [diff] [blame] | 65 | pendingStr string |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 66 | stringStart int |
| 67 | varStart int |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 68 | result *varNinjaString |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 69 | } |
| 70 | |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 71 | func (ps *parseState) pushVariable(v Variable) { |
| 72 | if len(ps.result.variables) == len(ps.result.strings) { |
| 73 | // Last push was a variable, we need a blank string separator |
| 74 | ps.result.strings = append(ps.result.strings, "") |
| 75 | } |
Colin Cross | 8de48af | 2017-05-09 10:03:00 -0700 | [diff] [blame] | 76 | if ps.pendingStr != "" { |
| 77 | panic("oops, pushed variable with pending string") |
| 78 | } |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 79 | ps.result.variables = append(ps.result.variables, v) |
| 80 | } |
| 81 | |
| 82 | func (ps *parseState) pushString(s string) { |
| 83 | if len(ps.result.strings) != len(ps.result.variables) { |
| 84 | panic("oops, pushed string after string") |
| 85 | } |
Colin Cross | 8de48af | 2017-05-09 10:03:00 -0700 | [diff] [blame] | 86 | ps.result.strings = append(ps.result.strings, ps.pendingStr+s) |
| 87 | ps.pendingStr = "" |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 88 | } |
| 89 | |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 90 | type stateFunc func(*parseState, int, rune) (stateFunc, error) |
| 91 | |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 92 | // parseNinjaString parses an unescaped ninja string (i.e. all $<something> |
| 93 | // occurrences are expected to be variables or $$) and returns a list of the |
| 94 | // variable names that the string references. |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 95 | func parseNinjaString(scope scope, str string) (ninjaString, error) { |
Colin Cross | 8c1c6c0 | 2015-04-14 16:28:51 -0700 | [diff] [blame] | 96 | // naively pre-allocate slices by counting $ signs |
| 97 | n := strings.Count(str, "$") |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 98 | if n == 0 { |
| 99 | if strings.HasPrefix(str, " ") { |
| 100 | str = "$" + str |
| 101 | } |
| 102 | return literalNinjaString(str), nil |
| 103 | } |
| 104 | result := &varNinjaString{ |
Colin Cross | 8c1c6c0 | 2015-04-14 16:28:51 -0700 | [diff] [blame] | 105 | strings: make([]string, 0, n+1), |
| 106 | variables: make([]Variable, 0, n), |
| 107 | } |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 108 | |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 109 | parseState := &parseState{ |
| 110 | scope: scope, |
| 111 | str: str, |
| 112 | result: result, |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 113 | } |
| 114 | |
Colin Cross | 8de48af | 2017-05-09 10:03:00 -0700 | [diff] [blame] | 115 | state := parseFirstRuneState |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 116 | var err error |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 117 | for i := 0; i < len(str); i++ { |
| 118 | r := rune(str[i]) |
| 119 | state, err = state(parseState, i, r) |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 120 | if err != nil { |
| 121 | return nil, err |
| 122 | } |
| 123 | } |
| 124 | |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 125 | _, err = state(parseState, len(parseState.str), eof) |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 126 | if err != nil { |
| 127 | return nil, err |
| 128 | } |
| 129 | |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 130 | return result, nil |
| 131 | } |
| 132 | |
Colin Cross | 8de48af | 2017-05-09 10:03:00 -0700 | [diff] [blame] | 133 | func parseFirstRuneState(state *parseState, i int, r rune) (stateFunc, error) { |
| 134 | if r == ' ' { |
| 135 | state.pendingStr += "$" |
| 136 | } |
| 137 | return parseStringState(state, i, r) |
| 138 | } |
| 139 | |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 140 | func parseStringState(state *parseState, i int, r rune) (stateFunc, error) { |
| 141 | switch { |
| 142 | case r == '$': |
| 143 | state.varStart = i + 1 |
| 144 | return parseDollarStartState, nil |
| 145 | |
| 146 | case r == eof: |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 147 | state.pushString(state.str[state.stringStart:i]) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 148 | return nil, nil |
| 149 | |
| 150 | default: |
| 151 | return parseStringState, nil |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | func parseDollarStartState(state *parseState, i int, r rune) (stateFunc, error) { |
| 156 | switch { |
| 157 | case r >= 'a' && r <= 'z', r >= 'A' && r <= 'Z', |
| 158 | r >= '0' && r <= '9', r == '_', r == '-': |
| 159 | // The beginning of a of the variable name. Output the string and |
| 160 | // keep going. |
Colin Cross | 63d5d4d | 2015-04-20 16:41:55 -0700 | [diff] [blame] | 161 | state.pushString(state.str[state.stringStart : i-1]) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 162 | return parseDollarState, nil |
| 163 | |
| 164 | case r == '$': |
| 165 | // Just a "$$". Go back to parseStringState without changing |
| 166 | // state.stringStart. |
| 167 | return parseStringState, nil |
| 168 | |
| 169 | case r == '{': |
| 170 | // This is a bracketted variable name (e.g. "${blah.blah}"). Output |
| 171 | // the string and keep going. |
Colin Cross | 63d5d4d | 2015-04-20 16:41:55 -0700 | [diff] [blame] | 172 | state.pushString(state.str[state.stringStart : i-1]) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 173 | state.varStart = i + 1 |
| 174 | return parseBracketsState, nil |
| 175 | |
| 176 | case r == eof: |
| 177 | return nil, fmt.Errorf("unexpected end of string after '$'") |
| 178 | |
| 179 | default: |
| 180 | // This was some arbitrary character following a dollar sign, |
| 181 | // which is not allowed. |
| 182 | return nil, fmt.Errorf("invalid character after '$' at byte "+ |
| 183 | "offset %d", i) |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | func parseDollarState(state *parseState, i int, r rune) (stateFunc, error) { |
| 188 | switch { |
| 189 | case r >= 'a' && r <= 'z', r >= 'A' && r <= 'Z', |
| 190 | r >= '0' && r <= '9', r == '_', r == '-': |
| 191 | // A part of the variable name. Keep going. |
| 192 | return parseDollarState, nil |
| 193 | |
| 194 | case r == '$': |
| 195 | // A dollar after the variable name (e.g. "$blah$"). Output the |
| 196 | // variable we have and start a new one. |
| 197 | v, err := state.scope.LookupVariable(state.str[state.varStart:i]) |
| 198 | if err != nil { |
| 199 | return nil, err |
| 200 | } |
| 201 | |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 202 | state.pushVariable(v) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 203 | state.varStart = i + 1 |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 204 | state.stringStart = i |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 205 | |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 206 | return parseDollarStartState, nil |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 207 | |
| 208 | case r == eof: |
| 209 | // This is the end of the variable name. |
| 210 | v, err := state.scope.LookupVariable(state.str[state.varStart:i]) |
| 211 | if err != nil { |
| 212 | return nil, err |
| 213 | } |
| 214 | |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 215 | state.pushVariable(v) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 216 | |
| 217 | // We always end with a string, even if it's an empty one. |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 218 | state.pushString("") |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 219 | |
| 220 | return nil, nil |
| 221 | |
| 222 | default: |
| 223 | // We've just gone past the end of the variable name, so record what |
| 224 | // we have. |
| 225 | v, err := state.scope.LookupVariable(state.str[state.varStart:i]) |
| 226 | if err != nil { |
| 227 | return nil, err |
| 228 | } |
| 229 | |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 230 | state.pushVariable(v) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 231 | state.stringStart = i |
| 232 | return parseStringState, nil |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | func parseBracketsState(state *parseState, i int, r rune) (stateFunc, error) { |
| 237 | switch { |
| 238 | case r >= 'a' && r <= 'z', r >= 'A' && r <= 'Z', |
| 239 | r >= '0' && r <= '9', r == '_', r == '-', r == '.': |
| 240 | // A part of the variable name. Keep going. |
| 241 | return parseBracketsState, nil |
| 242 | |
| 243 | case r == '}': |
| 244 | if state.varStart == i { |
| 245 | // The brackets were immediately closed. That's no good. |
| 246 | return nil, fmt.Errorf("empty variable name at byte offset %d", |
| 247 | i) |
| 248 | } |
| 249 | |
| 250 | // This is the end of the variable name. |
| 251 | v, err := state.scope.LookupVariable(state.str[state.varStart:i]) |
| 252 | if err != nil { |
| 253 | return nil, err |
| 254 | } |
| 255 | |
Colin Cross | b247893 | 2015-04-14 16:10:21 -0700 | [diff] [blame] | 256 | state.pushVariable(v) |
Colin Cross | e4cfdf9 | 2014-12-12 15:13:53 -0800 | [diff] [blame] | 257 | state.stringStart = i + 1 |
| 258 | return parseStringState, nil |
| 259 | |
| 260 | case r == eof: |
| 261 | return nil, fmt.Errorf("unexpected end of string in variable name") |
| 262 | |
| 263 | default: |
| 264 | // This character isn't allowed in a variable name. |
| 265 | return nil, fmt.Errorf("invalid character in variable name at "+ |
| 266 | "byte offset %d", i) |
| 267 | } |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 270 | func parseNinjaStrings(scope scope, strs []string) ([]ninjaString, |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 271 | error) { |
| 272 | |
| 273 | if len(strs) == 0 { |
| 274 | return nil, nil |
| 275 | } |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 276 | result := make([]ninjaString, len(strs)) |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 277 | for i, str := range strs { |
| 278 | ninjaStr, err := parseNinjaString(scope, str) |
| 279 | if err != nil { |
| 280 | return nil, fmt.Errorf("error parsing element %d: %s", i, err) |
| 281 | } |
| 282 | result[i] = ninjaStr |
| 283 | } |
| 284 | return result, nil |
| 285 | } |
| 286 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 287 | func (n varNinjaString) Value(pkgNames map[*packageContext]string) string { |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 288 | if len(n.strings) == 1 { |
| 289 | return defaultEscaper.Replace(n.strings[0]) |
| 290 | } |
| 291 | str := &strings.Builder{} |
| 292 | n.ValueWithEscaper(str, pkgNames, defaultEscaper) |
| 293 | return str.String() |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 296 | func (n varNinjaString) ValueWithEscaper(w io.StringWriter, pkgNames map[*packageContext]string, |
| 297 | escaper *strings.Replacer) { |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 298 | |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 299 | w.WriteString(escaper.Replace(n.strings[0])) |
Colin Cross | 19ff727 | 2019-06-19 23:25:39 -0700 | [diff] [blame] | 300 | for i, v := range n.variables { |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 301 | w.WriteString("${") |
| 302 | w.WriteString(v.fullName(pkgNames)) |
| 303 | w.WriteString("}") |
| 304 | w.WriteString(escaper.Replace(n.strings[i+1])) |
Colin Cross | 19ff727 | 2019-06-19 23:25:39 -0700 | [diff] [blame] | 305 | } |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 308 | func (n varNinjaString) Eval(variables map[Variable]ninjaString) (string, error) { |
Jamie Gennis | df935ac | 2014-11-09 11:57:57 -0800 | [diff] [blame] | 309 | str := n.strings[0] |
| 310 | for i, v := range n.variables { |
Christian Zander | 6e2b232 | 2014-11-21 15:12:08 -0800 | [diff] [blame] | 311 | variable, ok := variables[v] |
| 312 | if !ok { |
| 313 | return "", fmt.Errorf("no such global variable: %s", v) |
| 314 | } |
| 315 | value, err := variable.Eval(variables) |
| 316 | if err != nil { |
| 317 | return "", err |
| 318 | } |
Jamie Gennis | df935ac | 2014-11-09 11:57:57 -0800 | [diff] [blame] | 319 | str += value + n.strings[i+1] |
| 320 | } |
Christian Zander | 6e2b232 | 2014-11-21 15:12:08 -0800 | [diff] [blame] | 321 | return str, nil |
Jamie Gennis | df935ac | 2014-11-09 11:57:57 -0800 | [diff] [blame] | 322 | } |
| 323 | |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 324 | func (n varNinjaString) Variables() []Variable { |
| 325 | return n.variables |
| 326 | } |
| 327 | |
| 328 | func (l literalNinjaString) Value(pkgNames map[*packageContext]string) string { |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 329 | return defaultEscaper.Replace(string(l)) |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 330 | } |
| 331 | |
Colin Cross | 8a40148 | 2021-01-21 18:27:14 -0800 | [diff] [blame] | 332 | func (l literalNinjaString) ValueWithEscaper(w io.StringWriter, pkgNames map[*packageContext]string, |
| 333 | escaper *strings.Replacer) { |
| 334 | w.WriteString(escaper.Replace(string(l))) |
Colin Cross | 2ce594e | 2020-01-29 12:58:03 -0800 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | func (l literalNinjaString) Eval(variables map[Variable]ninjaString) (string, error) { |
| 338 | return string(l), nil |
| 339 | } |
| 340 | |
| 341 | func (l literalNinjaString) Variables() []Variable { |
| 342 | return nil |
| 343 | } |
| 344 | |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 345 | func validateNinjaName(name string) error { |
| 346 | for i, r := range name { |
| 347 | valid := (r >= 'a' && r <= 'z') || |
| 348 | (r >= 'A' && r <= 'Z') || |
| 349 | (r >= '0' && r <= '9') || |
| 350 | (r == '_') || |
| 351 | (r == '-') || |
| 352 | (r == '.') |
| 353 | if !valid { |
Jamie Gennis | 6736ec3 | 2014-10-05 07:40:16 -0700 | [diff] [blame] | 354 | |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 355 | return fmt.Errorf("%q contains an invalid Ninja name character "+ |
Jamie Gennis | 6736ec3 | 2014-10-05 07:40:16 -0700 | [diff] [blame] | 356 | "%q at byte offset %d", name, r, i) |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 357 | } |
| 358 | } |
| 359 | return nil |
| 360 | } |
| 361 | |
Colin Cross | 6134a5c | 2015-02-10 11:26:26 -0800 | [diff] [blame] | 362 | func toNinjaName(name string) string { |
| 363 | ret := bytes.Buffer{} |
| 364 | ret.Grow(len(name)) |
| 365 | for _, r := range name { |
| 366 | valid := (r >= 'a' && r <= 'z') || |
| 367 | (r >= 'A' && r <= 'Z') || |
| 368 | (r >= '0' && r <= '9') || |
| 369 | (r == '_') || |
| 370 | (r == '-') || |
| 371 | (r == '.') |
| 372 | if valid { |
| 373 | ret.WriteRune(r) |
| 374 | } else { |
Jeff Gaston | 0e90759 | 2017-12-01 17:10:52 -0800 | [diff] [blame] | 375 | // TODO(jeffrygaston): do escaping so that toNinjaName won't ever output duplicate |
| 376 | // names for two different input names |
Colin Cross | 6134a5c | 2015-02-10 11:26:26 -0800 | [diff] [blame] | 377 | ret.WriteRune('_') |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | return ret.String() |
| 382 | } |
| 383 | |
Jamie Gennis | 1bc967e | 2014-05-27 16:34:41 -0700 | [diff] [blame] | 384 | var builtinRuleArgs = []string{"out", "in"} |
| 385 | |
| 386 | func validateArgName(argName string) error { |
| 387 | err := validateNinjaName(argName) |
| 388 | if err != nil { |
| 389 | return err |
| 390 | } |
| 391 | |
| 392 | // We only allow globals within the rule's package to be used as rule |
| 393 | // arguments. A global in another package can always be mirrored into |
| 394 | // the rule's package by defining a new variable, so this doesn't limit |
| 395 | // what's possible. This limitation prevents situations where a Build |
| 396 | // invocation in another package must use the rule-defining package's |
| 397 | // import name for a 3rd package in order to set the rule's arguments. |
| 398 | if strings.ContainsRune(argName, '.') { |
| 399 | return fmt.Errorf("%q contains a '.' character", argName) |
| 400 | } |
| 401 | |
| 402 | for _, builtin := range builtinRuleArgs { |
| 403 | if argName == builtin { |
| 404 | return fmt.Errorf("%q conflicts with Ninja built-in", argName) |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | return nil |
| 409 | } |
| 410 | |
| 411 | func validateArgNames(argNames []string) error { |
| 412 | for _, argName := range argNames { |
| 413 | err := validateArgName(argName) |
| 414 | if err != nil { |
| 415 | return err |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | return nil |
| 420 | } |