Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "bufio" |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 5 | "bytes" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 6 | "errors" |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 7 | "fmt" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 8 | "io" |
| 9 | "os" |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 10 | "strings" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 11 | ) |
| 12 | |
| 13 | type Makefile struct { |
| 14 | stmts []AST |
| 15 | } |
| 16 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 17 | type ifState struct { |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 18 | ast *IfAST |
| 19 | inElse bool |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 20 | } |
| 21 | |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 22 | type parser struct { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 23 | rd *bufio.Reader |
| 24 | mk Makefile |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 25 | filename string |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 26 | lineno int |
| 27 | elineno int // lineno == elineno unless there is trailing '\'. |
| 28 | unBuf []byte |
| 29 | hasUnBuf bool |
| 30 | done bool |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 31 | outStmts *[]AST |
| 32 | ifStack []ifState |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 33 | } |
| 34 | |
| 35 | func exists(filename string) bool { |
| 36 | f, err := os.Open(filename) |
| 37 | if err != nil { |
| 38 | return false |
| 39 | } |
| 40 | f.Close() |
| 41 | return true |
| 42 | } |
| 43 | |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 44 | func newParser(rd io.Reader, filename string) *parser { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 45 | p := &parser{ |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 46 | rd: bufio.NewReader(rd), |
| 47 | filename: filename, |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 48 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 49 | p.outStmts = &p.mk.stmts |
| 50 | return p |
| 51 | } |
| 52 | |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 53 | func (p *parser) addStatement(ast AST) { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 54 | *p.outStmts = append(*p.outStmts, ast) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 55 | } |
| 56 | |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 57 | func (p *parser) readLine() []byte { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 58 | if p.hasUnBuf { |
| 59 | p.hasUnBuf = false |
| 60 | return p.unBuf |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | p.lineno = p.elineno |
| 64 | line, err := p.rd.ReadBytes('\n') |
| 65 | p.lineno++ |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 66 | p.elineno = p.lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 67 | if err == io.EOF { |
| 68 | p.done = true |
| 69 | } else if err != nil { |
| 70 | panic(err) |
| 71 | } |
| 72 | |
| 73 | if len(line) > 0 { |
| 74 | line = line[0 : len(line)-1] |
| 75 | } |
| 76 | |
| 77 | // TODO: Handle \\ at the end of the line? |
| 78 | for len(line) > 0 && line[len(line)-1] == '\\' { |
| 79 | line = line[:len(line)-1] |
| 80 | nline := p.readLine() |
| 81 | p.elineno++ |
| 82 | line = append(line, nline...) |
| 83 | } |
| 84 | |
| 85 | index := bytes.IndexByte(line, '#') |
| 86 | if index >= 0 { |
| 87 | line = line[:index] |
| 88 | } |
| 89 | |
| 90 | return line |
| 91 | } |
| 92 | |
| 93 | func (p *parser) unreadLine(line []byte) { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 94 | if p.hasUnBuf { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 95 | panic("unreadLine twice!") |
| 96 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 97 | p.unBuf = line |
| 98 | p.hasUnBuf = true |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 99 | } |
| 100 | |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 101 | func (p *parser) parseAssign(line []byte, sep, esep int) AST { |
| 102 | Log("parseAssign %s %s", line, line[sep:esep]) |
| 103 | ast := &AssignAST{ |
| 104 | lhs: string(bytes.TrimSpace(line[:sep])), |
| 105 | rhs: string(bytes.TrimLeft(line[esep:], " \t")), |
| 106 | op: string(line[sep:esep]), |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 107 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 108 | ast.filename = p.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 109 | ast.lineno = p.lineno |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 110 | return ast |
| 111 | } |
| 112 | |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 113 | func (p *parser) parseMaybeRule(line string) AST { |
| 114 | if len(strings.TrimSpace(line)) == 0 { |
| 115 | return nil |
| 116 | } |
| 117 | if line[0] == '\t' { |
| 118 | Error(p.filename, p.lineno, "*** commands commence before first target.") |
| 119 | } |
| 120 | |
| 121 | ast := &MaybeRuleAST{ |
| 122 | expr: line, |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 123 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 124 | ast.filename = p.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 125 | ast.lineno = p.lineno |
Shinichiro Hamaji | 7c4e325 | 2015-03-30 23:04:25 +0900 | [diff] [blame] | 126 | ast.cmdLineno = p.elineno + 1 |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 127 | for { |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 128 | line := p.readLine() |
| 129 | if len(line) == 0 { |
| 130 | break |
| 131 | } else if line[0] == '\t' { |
| 132 | ast.cmds = append(ast.cmds, string(bytes.TrimSpace(line))) |
| 133 | } else { |
| 134 | p.unreadLine(line) |
| 135 | break |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 136 | } |
| 137 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 138 | return ast |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 139 | } |
| 140 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 141 | func (p *parser) parseInclude(line string, oplen int) AST { |
| 142 | ast := &IncludeAST{ |
| 143 | expr: line[oplen+1:], |
| 144 | op: line[:oplen], |
| 145 | } |
| 146 | ast.filename = p.filename |
| 147 | ast.lineno = p.lineno |
| 148 | return ast |
| 149 | } |
| 150 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 151 | func (p *parser) parseIfdef(line string, oplen int) AST { |
| 152 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 153 | op: line[:oplen], |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 154 | lhs: strings.TrimSpace(line[oplen+1:]), |
| 155 | } |
| 156 | ast.filename = p.filename |
| 157 | ast.lineno = p.lineno |
| 158 | p.addStatement(ast) |
| 159 | p.ifStack = append(p.ifStack, ifState{ast: ast}) |
| 160 | p.outStmts = &ast.trueStmts |
| 161 | return ast |
| 162 | } |
| 163 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 164 | func closeParen(ch byte) (byte, error) { |
| 165 | switch ch { |
| 166 | case '(': |
| 167 | return ')', nil |
| 168 | case '{': |
| 169 | return '}', nil |
| 170 | default: |
| 171 | return 0, fmt.Errorf("unexpected paren %c", ch) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 172 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 173 | } |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 174 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 175 | // parseExpr parses s as expr. |
| 176 | // The expr should starts with '(' or '{' and returns strings |
| 177 | // separeted by ',' before ')' or '}' respectively, and an index for the rest. |
| 178 | func parseExpr(s string) ([]string, int, error) { |
| 179 | if len(s) == 0 { |
| 180 | return nil, 0, errors.New("empty expr") |
| 181 | } |
| 182 | paren, err := closeParen(s[0]) |
| 183 | if err != nil { |
| 184 | return nil, 0, err |
| 185 | } |
| 186 | parenCnt := make(map[byte]int) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 187 | i := 0 |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 188 | ia := 1 |
| 189 | var args []string |
| 190 | Loop: |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 191 | for { |
| 192 | i++ |
| 193 | if i == len(s) { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 194 | return nil, 0, errors.New("unexpected end of expr") |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 195 | } |
| 196 | ch := s[i] |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 197 | switch ch { |
| 198 | case '(', '{': |
| 199 | cch, err := closeParen(ch) |
| 200 | if err != nil { |
| 201 | return nil, 0, err |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 202 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 203 | parenCnt[cch]++ |
| 204 | case ')', '}': |
| 205 | parenCnt[ch]-- |
| 206 | if ch == paren && parenCnt[ch] < 0 { |
| 207 | break Loop |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 208 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 209 | case ',': |
| 210 | if parenCnt[')'] == 0 && parenCnt['}'] == 0 { |
| 211 | args = append(args, s[ia:i]) |
| 212 | ia = i + 1 |
| 213 | } |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 214 | } |
| 215 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 216 | args = append(args, s[ia:i]) |
| 217 | return args, i + 1, nil |
| 218 | } |
| 219 | |
| 220 | func parseEq(s string) (string, string, bool) { |
| 221 | args, _, err := parseExpr(s) |
| 222 | if err != nil { |
| 223 | return "", "", false |
| 224 | } |
| 225 | if len(args) != 2 { |
| 226 | return "", "", false |
| 227 | } |
| 228 | // TODO: check rest? |
| 229 | return args[0], args[1], true |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 230 | } |
| 231 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 232 | func (p *parser) parseIfeq(line string, oplen int) AST { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 233 | lhs, rhs, ok := parseEq(strings.TrimSpace(line[oplen+1:])) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 234 | if !ok { |
| 235 | Error(p.filename, p.lineno, `*** invalid syntax in conditional.`) |
| 236 | } |
| 237 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 238 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 239 | op: line[:oplen], |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 240 | lhs: lhs, |
| 241 | rhs: rhs, |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 242 | } |
| 243 | ast.filename = p.filename |
| 244 | ast.lineno = p.lineno |
| 245 | p.addStatement(ast) |
| 246 | p.ifStack = append(p.ifStack, ifState{ast: ast}) |
| 247 | p.outStmts = &ast.trueStmts |
| 248 | return ast |
| 249 | } |
| 250 | |
| 251 | func (p *parser) checkIfStack(curKeyword string) { |
| 252 | if len(p.ifStack) == 0 { |
| 253 | Error(p.filename, p.lineno, `*** extraneous %q.`, curKeyword) |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | func (p *parser) parseElse(line string) { |
| 258 | p.checkIfStack("else") |
| 259 | state := &p.ifStack[len(p.ifStack)-1] |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 260 | if state.inElse { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 261 | Error(p.filename, p.lineno, `*** only one "else" per conditional.`) |
| 262 | } |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 263 | state.inElse = true |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 264 | p.outStmts = &state.ast.falseStmts |
| 265 | } |
| 266 | |
| 267 | func (p *parser) parseEndif(line string) { |
| 268 | p.checkIfStack("endif") |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 269 | p.ifStack = p.ifStack[0 : len(p.ifStack)-1] |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 270 | if len(p.ifStack) == 0 { |
| 271 | p.outStmts = &p.mk.stmts |
| 272 | } else { |
| 273 | state := p.ifStack[len(p.ifStack)-1] |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 274 | if state.inElse { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 275 | p.outStmts = &state.ast.falseStmts |
| 276 | } else { |
| 277 | p.outStmts = &state.ast.trueStmts |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame^] | 282 | var directives = map[string]func(*parser, string){ |
| 283 | "include ": includeDirective, |
| 284 | "-include ": sincludeDirective, |
| 285 | "sinclude": sincludeDirective, |
| 286 | "ifdef ": ifdefDirective, |
| 287 | "ifndef ": ifndefDirective, |
| 288 | "ifeq ": ifeqDirective, |
| 289 | "ifneq ": ifneqDirective, |
| 290 | "else": elseDirective, |
| 291 | "endif": endifDirective, |
| 292 | } |
| 293 | |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 294 | func (p *parser) parseKeywords(line string) bool { |
Shinichiro Hamaji | e3a9463 | 2015-03-31 01:12:52 +0900 | [diff] [blame] | 295 | stripped := strings.TrimLeft(line, " \t") |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame^] | 296 | for prefix, f := range directives { |
| 297 | if strings.HasPrefix(stripped, prefix) { |
| 298 | f(p, stripped) |
| 299 | return true |
| 300 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 301 | } |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 302 | return false |
| 303 | } |
| 304 | |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame^] | 305 | func includeDirective(p *parser, line string) { |
| 306 | p.addStatement(p.parseInclude(line, len("include"))) |
| 307 | } |
| 308 | |
| 309 | func sincludeDirective(p *parser, line string) { |
| 310 | p.addStatement(p.parseInclude(line, len("-include"))) |
| 311 | } |
| 312 | |
| 313 | func ifdefDirective(p *parser, line string) { |
| 314 | p.parseIfdef(line, len("ifdef")) |
| 315 | } |
| 316 | |
| 317 | func ifndefDirective(p *parser, line string) { |
| 318 | p.parseIfdef(line, len("ifndef")) |
| 319 | } |
| 320 | |
| 321 | func ifeqDirective(p *parser, line string) { |
| 322 | p.parseIfeq(line, len("ifeq")) |
| 323 | } |
| 324 | |
| 325 | func ifneqDirective(p *parser, line string) { |
| 326 | p.parseIfeq(line, len("ifneq")) |
| 327 | } |
| 328 | |
| 329 | func elseDirective(p *parser, line string) { |
| 330 | p.parseElse(line) |
| 331 | } |
| 332 | |
| 333 | func endifDirective(p *parser, line string) { |
| 334 | p.parseEndif(line) |
| 335 | } |
| 336 | |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 337 | func (p *parser) parse() (mk Makefile, err error) { |
| 338 | defer func() { |
| 339 | if r := recover(); r != nil { |
| 340 | err = fmt.Errorf("panic: %v", r) |
| 341 | } |
| 342 | }() |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 343 | for !p.done { |
| 344 | line := p.readLine() |
| 345 | |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 346 | if p.parseKeywords(string(line)) { |
| 347 | continue |
| 348 | } |
| 349 | |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 350 | var ast AST |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 351 | for i, ch := range line { |
| 352 | switch ch { |
| 353 | case ':': |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 354 | if i+1 < len(line) && line[i+1] == '=' { |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 355 | ast = p.parseAssign(line, i, i+2) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 356 | } else { |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 357 | ast = p.parseMaybeRule(string(line)) |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 358 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 359 | case '=': |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 360 | ast = p.parseAssign(line, i, i+1) |
Shinichiro Hamaji | 69b7f65 | 2015-03-31 01:01:59 +0900 | [diff] [blame] | 361 | case '?', '+': |
| 362 | if i+1 < len(line) && line[i+1] == '=' { |
| 363 | ast = p.parseAssign(line, i, i+2) |
| 364 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 365 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 366 | if ast != nil { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 367 | p.addStatement(ast) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 368 | break |
| 369 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 370 | } |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 371 | if ast == nil { |
| 372 | ast = p.parseMaybeRule(string(line)) |
| 373 | if ast != nil { |
| 374 | p.addStatement(ast) |
| 375 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 376 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 377 | } |
| 378 | return p.mk, nil |
| 379 | } |
| 380 | |
| 381 | func ParseMakefile(filename string) (Makefile, error) { |
| 382 | f, err := os.Open(filename) |
| 383 | if err != nil { |
| 384 | return Makefile{}, err |
| 385 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 386 | defer f.Close() |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 387 | parser := newParser(f, filename) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 388 | return parser.parse() |
| 389 | } |
| 390 | |
| 391 | func ParseDefaultMakefile() (Makefile, error) { |
| 392 | candidates := []string{"GNUmakefile", "makefile", "Makefile"} |
| 393 | for _, filename := range candidates { |
| 394 | if exists(filename) { |
| 395 | return ParseMakefile(filename) |
| 396 | } |
| 397 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 398 | return Makefile{}, errors.New("no targets specified and no makefile found.") |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 399 | } |