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 | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 33 | inDef []string |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | func exists(filename string) bool { |
| 37 | f, err := os.Open(filename) |
| 38 | if err != nil { |
| 39 | return false |
| 40 | } |
| 41 | f.Close() |
| 42 | return true |
| 43 | } |
| 44 | |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 45 | func newParser(rd io.Reader, filename string) *parser { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 46 | p := &parser{ |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 47 | rd: bufio.NewReader(rd), |
| 48 | filename: filename, |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 49 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 50 | p.outStmts = &p.mk.stmts |
| 51 | return p |
| 52 | } |
| 53 | |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 54 | func (p *parser) addStatement(ast AST) { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 55 | *p.outStmts = append(*p.outStmts, ast) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 56 | } |
| 57 | |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 58 | func (p *parser) readLine() []byte { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 59 | if p.hasUnBuf { |
| 60 | p.hasUnBuf = false |
| 61 | return p.unBuf |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | p.lineno = p.elineno |
| 65 | line, err := p.rd.ReadBytes('\n') |
| 66 | p.lineno++ |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 67 | p.elineno = p.lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 68 | if err == io.EOF { |
| 69 | p.done = true |
| 70 | } else if err != nil { |
| 71 | panic(err) |
| 72 | } |
| 73 | |
| 74 | if len(line) > 0 { |
| 75 | line = line[0 : len(line)-1] |
| 76 | } |
| 77 | |
| 78 | // TODO: Handle \\ at the end of the line? |
| 79 | for len(line) > 0 && line[len(line)-1] == '\\' { |
| 80 | line = line[:len(line)-1] |
| 81 | nline := p.readLine() |
| 82 | p.elineno++ |
| 83 | line = append(line, nline...) |
| 84 | } |
| 85 | |
| 86 | index := bytes.IndexByte(line, '#') |
| 87 | if index >= 0 { |
| 88 | line = line[:index] |
| 89 | } |
| 90 | |
| 91 | return line |
| 92 | } |
| 93 | |
| 94 | func (p *parser) unreadLine(line []byte) { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 95 | if p.hasUnBuf { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 96 | panic("unreadLine twice!") |
| 97 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 98 | p.unBuf = line |
| 99 | p.hasUnBuf = true |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 100 | } |
| 101 | |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 102 | func (p *parser) parseAssign(line []byte, sep, esep int) AST { |
Fumitoshi Ukai | 8773e5e | 2015-04-01 11:23:18 +0900 | [diff] [blame] | 103 | Log("parseAssign %q op:%q", line, line[sep:esep]) |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 104 | ast := &AssignAST{ |
| 105 | lhs: string(bytes.TrimSpace(line[:sep])), |
| 106 | rhs: string(bytes.TrimLeft(line[esep:], " \t")), |
| 107 | op: string(line[sep:esep]), |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 108 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 109 | ast.filename = p.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 110 | ast.lineno = p.lineno |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 111 | return ast |
| 112 | } |
| 113 | |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 114 | func (p *parser) parseMaybeRule(line string) AST { |
| 115 | if len(strings.TrimSpace(line)) == 0 { |
| 116 | return nil |
| 117 | } |
| 118 | if line[0] == '\t' { |
| 119 | Error(p.filename, p.lineno, "*** commands commence before first target.") |
| 120 | } |
| 121 | |
Shinichiro Hamaji | 19f4bf6 | 2015-04-02 04:55:57 +0900 | [diff] [blame] | 122 | ast := &MaybeRuleAST{} |
| 123 | if i := strings.IndexByte(line, ';'); i >= 0 { |
| 124 | ast.expr = line[:i] |
| 125 | ast.cmds = append(ast.cmds, strings.TrimSpace(line[i+1:])) |
| 126 | } else { |
| 127 | ast.expr = line |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 128 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 129 | ast.filename = p.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 130 | ast.lineno = p.lineno |
Shinichiro Hamaji | 7c4e325 | 2015-03-30 23:04:25 +0900 | [diff] [blame] | 131 | ast.cmdLineno = p.elineno + 1 |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 132 | for { |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 133 | line := p.readLine() |
| 134 | if len(line) == 0 { |
| 135 | break |
| 136 | } else if line[0] == '\t' { |
Shinichiro Hamaji | 79abd18 | 2015-04-03 11:07:38 +0900 | [diff] [blame] | 137 | ast.cmds = append(ast.cmds, string(bytes.TrimLeft(line, " \t"))) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 138 | } else { |
| 139 | p.unreadLine(line) |
| 140 | break |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 141 | } |
| 142 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 143 | return ast |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 144 | } |
| 145 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 146 | func (p *parser) parseInclude(line string, oplen int) AST { |
| 147 | ast := &IncludeAST{ |
| 148 | expr: line[oplen+1:], |
| 149 | op: line[:oplen], |
| 150 | } |
| 151 | ast.filename = p.filename |
| 152 | ast.lineno = p.lineno |
| 153 | return ast |
| 154 | } |
| 155 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 156 | func (p *parser) parseIfdef(line string, oplen int) AST { |
| 157 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 158 | op: line[:oplen], |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 159 | lhs: strings.TrimSpace(line[oplen+1:]), |
| 160 | } |
| 161 | ast.filename = p.filename |
| 162 | ast.lineno = p.lineno |
| 163 | p.addStatement(ast) |
| 164 | p.ifStack = append(p.ifStack, ifState{ast: ast}) |
| 165 | p.outStmts = &ast.trueStmts |
| 166 | return ast |
| 167 | } |
| 168 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 169 | func closeParen(ch byte) (byte, error) { |
| 170 | switch ch { |
| 171 | case '(': |
| 172 | return ')', nil |
| 173 | case '{': |
| 174 | return '}', nil |
| 175 | default: |
| 176 | return 0, fmt.Errorf("unexpected paren %c", ch) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 177 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 178 | } |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 179 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 180 | // parseExpr parses s as expr. |
| 181 | // The expr should starts with '(' or '{' and returns strings |
| 182 | // separeted by ',' before ')' or '}' respectively, and an index for the rest. |
| 183 | func parseExpr(s string) ([]string, int, error) { |
| 184 | if len(s) == 0 { |
| 185 | return nil, 0, errors.New("empty expr") |
| 186 | } |
| 187 | paren, err := closeParen(s[0]) |
| 188 | if err != nil { |
| 189 | return nil, 0, err |
| 190 | } |
| 191 | parenCnt := make(map[byte]int) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 192 | i := 0 |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 193 | ia := 1 |
| 194 | var args []string |
| 195 | Loop: |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 196 | for { |
| 197 | i++ |
| 198 | if i == len(s) { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 199 | return nil, 0, errors.New("unexpected end of expr") |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 200 | } |
| 201 | ch := s[i] |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 202 | switch ch { |
| 203 | case '(', '{': |
| 204 | cch, err := closeParen(ch) |
| 205 | if err != nil { |
| 206 | return nil, 0, err |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 207 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 208 | parenCnt[cch]++ |
| 209 | case ')', '}': |
| 210 | parenCnt[ch]-- |
| 211 | if ch == paren && parenCnt[ch] < 0 { |
| 212 | break Loop |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 213 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 214 | case ',': |
| 215 | if parenCnt[')'] == 0 && parenCnt['}'] == 0 { |
| 216 | args = append(args, s[ia:i]) |
| 217 | ia = i + 1 |
| 218 | } |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 219 | } |
| 220 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 221 | args = append(args, s[ia:i]) |
| 222 | return args, i + 1, nil |
| 223 | } |
| 224 | |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 225 | func parseTwoQuotes(s string) ([]string, bool) { |
| 226 | toks := splitSpaces(s) |
| 227 | if len(toks) != 2 { |
| 228 | return nil, false |
| 229 | } |
| 230 | var args []string |
| 231 | for _, tok := range toks { |
| 232 | if len(tok) < 2 { |
| 233 | return nil, false |
| 234 | } |
| 235 | ti := len(tok) - 1 |
| 236 | if tok[0] != tok[ti] || (tok[0] != '\'' && tok[ti] != '"') { |
| 237 | return nil, false |
| 238 | } |
| 239 | args = append(args, tok[1:ti]) |
| 240 | } |
| 241 | return args, true |
| 242 | } |
| 243 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 244 | func parseEq(s string) (string, string, bool) { |
| 245 | args, _, err := parseExpr(s) |
| 246 | if err != nil { |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 247 | args, ok := parseTwoQuotes(s) |
| 248 | if ok { |
| 249 | return args[0], args[1], true |
| 250 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 251 | return "", "", false |
| 252 | } |
| 253 | if len(args) != 2 { |
| 254 | return "", "", false |
| 255 | } |
| 256 | // TODO: check rest? |
| 257 | return args[0], args[1], true |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 258 | } |
| 259 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 260 | func (p *parser) parseIfeq(line string, oplen int) AST { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 261 | lhs, rhs, ok := parseEq(strings.TrimSpace(line[oplen+1:])) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 262 | if !ok { |
| 263 | Error(p.filename, p.lineno, `*** invalid syntax in conditional.`) |
| 264 | } |
| 265 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 266 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 267 | op: line[:oplen], |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 268 | lhs: lhs, |
| 269 | rhs: rhs, |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 270 | } |
| 271 | ast.filename = p.filename |
| 272 | ast.lineno = p.lineno |
| 273 | p.addStatement(ast) |
| 274 | p.ifStack = append(p.ifStack, ifState{ast: ast}) |
| 275 | p.outStmts = &ast.trueStmts |
| 276 | return ast |
| 277 | } |
| 278 | |
| 279 | func (p *parser) checkIfStack(curKeyword string) { |
| 280 | if len(p.ifStack) == 0 { |
| 281 | Error(p.filename, p.lineno, `*** extraneous %q.`, curKeyword) |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | func (p *parser) parseElse(line string) { |
| 286 | p.checkIfStack("else") |
| 287 | state := &p.ifStack[len(p.ifStack)-1] |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 288 | if state.inElse { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 289 | Error(p.filename, p.lineno, `*** only one "else" per conditional.`) |
| 290 | } |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 291 | state.inElse = true |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 292 | p.outStmts = &state.ast.falseStmts |
| 293 | } |
| 294 | |
| 295 | func (p *parser) parseEndif(line string) { |
| 296 | p.checkIfStack("endif") |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 297 | p.ifStack = p.ifStack[0 : len(p.ifStack)-1] |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 298 | if len(p.ifStack) == 0 { |
| 299 | p.outStmts = &p.mk.stmts |
| 300 | } else { |
| 301 | state := p.ifStack[len(p.ifStack)-1] |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 302 | if state.inElse { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 303 | p.outStmts = &state.ast.falseStmts |
| 304 | } else { |
| 305 | p.outStmts = &state.ast.trueStmts |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 310 | var directives = map[string]func(*parser, string){ |
| 311 | "include ": includeDirective, |
| 312 | "-include ": sincludeDirective, |
| 313 | "sinclude": sincludeDirective, |
| 314 | "ifdef ": ifdefDirective, |
| 315 | "ifndef ": ifndefDirective, |
| 316 | "ifeq ": ifeqDirective, |
| 317 | "ifneq ": ifneqDirective, |
| 318 | "else": elseDirective, |
| 319 | "endif": endifDirective, |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 320 | "define ": defineDirective, |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 321 | } |
| 322 | |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 323 | func (p *parser) parseKeywords(line string) bool { |
Shinichiro Hamaji | e3a9463 | 2015-03-31 01:12:52 +0900 | [diff] [blame] | 324 | stripped := strings.TrimLeft(line, " \t") |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 325 | for prefix, f := range directives { |
| 326 | if strings.HasPrefix(stripped, prefix) { |
| 327 | f(p, stripped) |
| 328 | return true |
| 329 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 330 | } |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 331 | return false |
| 332 | } |
| 333 | |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 334 | func includeDirective(p *parser, line string) { |
| 335 | p.addStatement(p.parseInclude(line, len("include"))) |
| 336 | } |
| 337 | |
| 338 | func sincludeDirective(p *parser, line string) { |
| 339 | p.addStatement(p.parseInclude(line, len("-include"))) |
| 340 | } |
| 341 | |
| 342 | func ifdefDirective(p *parser, line string) { |
| 343 | p.parseIfdef(line, len("ifdef")) |
| 344 | } |
| 345 | |
| 346 | func ifndefDirective(p *parser, line string) { |
| 347 | p.parseIfdef(line, len("ifndef")) |
| 348 | } |
| 349 | |
| 350 | func ifeqDirective(p *parser, line string) { |
| 351 | p.parseIfeq(line, len("ifeq")) |
| 352 | } |
| 353 | |
| 354 | func ifneqDirective(p *parser, line string) { |
| 355 | p.parseIfeq(line, len("ifneq")) |
| 356 | } |
| 357 | |
| 358 | func elseDirective(p *parser, line string) { |
| 359 | p.parseElse(line) |
| 360 | } |
| 361 | |
| 362 | func endifDirective(p *parser, line string) { |
| 363 | p.parseEndif(line) |
| 364 | } |
| 365 | |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 366 | func defineDirective(p *parser, line string) { |
| 367 | p.inDef = []string{strings.TrimLeft(line[len("define "):], " \t")} |
| 368 | } |
| 369 | |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 370 | func (p *parser) parse() (mk Makefile, err error) { |
| 371 | defer func() { |
| 372 | if r := recover(); r != nil { |
| 373 | err = fmt.Errorf("panic: %v", r) |
| 374 | } |
| 375 | }() |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 376 | for !p.done { |
| 377 | line := p.readLine() |
| 378 | |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 379 | if len(p.inDef) > 0 { |
| 380 | if strings.TrimLeft(string(line), " ") == "endef" { |
| 381 | Log("multilineAssign %q", p.inDef) |
| 382 | ast := &AssignAST{ |
| 383 | lhs: p.inDef[0], |
| 384 | rhs: strings.Join(p.inDef[1:], "\n"), |
| 385 | op: "=", |
| 386 | } |
| 387 | ast.filename = p.filename |
| 388 | ast.lineno = p.lineno - len(p.inDef) |
| 389 | p.addStatement(ast) |
| 390 | p.inDef = nil |
| 391 | continue |
| 392 | } |
| 393 | p.inDef = append(p.inDef, string(line)) |
| 394 | continue |
| 395 | } |
| 396 | |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 397 | if p.parseKeywords(string(line)) { |
| 398 | continue |
| 399 | } |
| 400 | |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 401 | var ast AST |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 402 | for i, ch := range line { |
| 403 | switch ch { |
| 404 | case ':': |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 405 | if i+1 < len(line) && line[i+1] == '=' { |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 406 | ast = p.parseAssign(line, i, i+2) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 407 | } else { |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 408 | ast = p.parseMaybeRule(string(line)) |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 409 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 410 | case '=': |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 411 | ast = p.parseAssign(line, i, i+1) |
Shinichiro Hamaji | 69b7f65 | 2015-03-31 01:01:59 +0900 | [diff] [blame] | 412 | case '?', '+': |
| 413 | if i+1 < len(line) && line[i+1] == '=' { |
| 414 | ast = p.parseAssign(line, i, i+2) |
| 415 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 416 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 417 | if ast != nil { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 418 | p.addStatement(ast) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 419 | break |
| 420 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 421 | } |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 422 | if ast == nil { |
| 423 | ast = p.parseMaybeRule(string(line)) |
| 424 | if ast != nil { |
| 425 | p.addStatement(ast) |
| 426 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 427 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 428 | } |
| 429 | return p.mk, nil |
| 430 | } |
| 431 | |
| 432 | func ParseMakefile(filename string) (Makefile, error) { |
| 433 | f, err := os.Open(filename) |
| 434 | if err != nil { |
| 435 | return Makefile{}, err |
| 436 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 437 | defer f.Close() |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 438 | parser := newParser(f, filename) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 439 | return parser.parse() |
| 440 | } |
| 441 | |
| 442 | func ParseDefaultMakefile() (Makefile, error) { |
| 443 | candidates := []string{"GNUmakefile", "makefile", "Makefile"} |
| 444 | for _, filename := range candidates { |
| 445 | if exists(filename) { |
| 446 | return ParseMakefile(filename) |
| 447 | } |
| 448 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 449 | return Makefile{}, errors.New("no targets specified and no makefile found.") |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 450 | } |
Shinichiro Hamaji | c384081 | 2015-04-02 02:10:20 +0900 | [diff] [blame] | 451 | |
Shinichiro Hamaji | a5dee37 | 2015-04-03 16:41:30 +0900 | [diff] [blame^] | 452 | func ParseMakefileString(s string, name string) (Makefile, error) { |
| 453 | rd := strings.NewReader(s) |
| 454 | parser := newParser(rd, name) |
| 455 | return parser.parse() |
Shinichiro Hamaji | c384081 | 2015-04-02 02:10:20 +0900 | [diff] [blame] | 456 | } |