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 { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 14 | filename string |
| 15 | stmts []AST |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 16 | } |
| 17 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 18 | type ifState struct { |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 19 | ast *IfAST |
| 20 | inElse bool |
| 21 | numNest int |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 22 | } |
| 23 | |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 24 | type parser struct { |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 25 | rd *bufio.Reader |
| 26 | mk Makefile |
| 27 | lineno int |
| 28 | elineno int // lineno == elineno unless there is trailing '\'. |
| 29 | unBuf []byte |
| 30 | hasUnBuf bool |
| 31 | done bool |
| 32 | outStmts *[]AST |
| 33 | ifStack []ifState |
| 34 | inDef []string |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 35 | numIfNest int |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | func exists(filename string) bool { |
| 39 | f, err := os.Open(filename) |
| 40 | if err != nil { |
| 41 | return false |
| 42 | } |
| 43 | f.Close() |
| 44 | return true |
| 45 | } |
| 46 | |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 47 | func newParser(rd io.Reader, filename string) *parser { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 48 | p := &parser{ |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 49 | rd: bufio.NewReader(rd), |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 50 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 51 | p.mk.filename = filename |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 52 | p.outStmts = &p.mk.stmts |
| 53 | return p |
| 54 | } |
| 55 | |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 56 | func (p *parser) addStatement(ast AST) { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 57 | *p.outStmts = append(*p.outStmts, ast) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 58 | } |
| 59 | |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 60 | func (p *parser) readLine() []byte { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 61 | if p.hasUnBuf { |
| 62 | p.hasUnBuf = false |
| 63 | return p.unBuf |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | p.lineno = p.elineno |
| 67 | line, err := p.rd.ReadBytes('\n') |
| 68 | p.lineno++ |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 69 | p.elineno = p.lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 70 | if err == io.EOF { |
| 71 | p.done = true |
| 72 | } else if err != nil { |
| 73 | panic(err) |
| 74 | } |
| 75 | |
Shinichiro Hamaji | bc702b0 | 2015-04-06 10:45:48 +0900 | [diff] [blame] | 76 | line = bytes.TrimRight(line, "\n") |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 77 | |
Shinichiro Hamaji | 52e83aa | 2015-04-06 17:20:28 +0900 | [diff] [blame] | 78 | return line |
| 79 | } |
| 80 | |
| 81 | func removeComment(line []byte) []byte { |
| 82 | var parenStack []byte |
| 83 | for i, ch := range line { |
| 84 | switch ch { |
| 85 | case '(', '{': |
| 86 | parenStack = append(parenStack, ch) |
| 87 | case ')', '}': |
| 88 | if len(parenStack) > 0 { |
| 89 | parenStack = parenStack[:len(parenStack)-1] |
| 90 | } |
| 91 | case '#': |
| 92 | if len(parenStack) == 0 { |
| 93 | return line[:i] |
| 94 | } |
| 95 | } |
| 96 | } |
| 97 | return line |
| 98 | } |
| 99 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 100 | func (p *parser) processMakefileLine(line []byte) []byte { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 101 | // TODO: Handle \\ at the end of the line? |
| 102 | for len(line) > 0 && line[len(line)-1] == '\\' { |
| 103 | line = line[:len(line)-1] |
Shinichiro Hamaji | 3e4533d | 2015-04-06 14:03:58 +0900 | [diff] [blame] | 104 | lineno := p.lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 105 | nline := p.readLine() |
Shinichiro Hamaji | 3e4533d | 2015-04-06 14:03:58 +0900 | [diff] [blame] | 106 | p.lineno = lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 107 | line = append(line, nline...) |
| 108 | } |
Shinichiro Hamaji | 52e83aa | 2015-04-06 17:20:28 +0900 | [diff] [blame] | 109 | return removeComment(line) |
| 110 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 111 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 112 | func (p *parser) processRecipeLine(line []byte) []byte { |
Shinichiro Hamaji | 52e83aa | 2015-04-06 17:20:28 +0900 | [diff] [blame] | 113 | // TODO: Handle \\ at the end of the line? |
| 114 | for len(line) > 0 && line[len(line)-1] == '\\' { |
| 115 | line = append(line, '\n') |
| 116 | lineno := p.lineno |
| 117 | nline := p.readLine() |
| 118 | p.lineno = lineno |
| 119 | line = append(line, nline...) |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 120 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 121 | return line |
| 122 | } |
| 123 | |
| 124 | func (p *parser) unreadLine(line []byte) { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 125 | if p.hasUnBuf { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 126 | panic("unreadLine twice!") |
| 127 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 128 | p.unBuf = line |
| 129 | p.hasUnBuf = true |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 130 | } |
| 131 | |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 132 | func (p *parser) parseAssign(line []byte, sep, esep int) AST { |
Fumitoshi Ukai | 8773e5e | 2015-04-01 11:23:18 +0900 | [diff] [blame] | 133 | Log("parseAssign %q op:%q", line, line[sep:esep]) |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 134 | ast := &AssignAST{ |
| 135 | lhs: string(bytes.TrimSpace(line[:sep])), |
| 136 | rhs: string(bytes.TrimLeft(line[esep:], " \t")), |
| 137 | op: string(line[sep:esep]), |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 138 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 139 | ast.filename = p.mk.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 140 | ast.lineno = p.lineno |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 141 | return ast |
| 142 | } |
| 143 | |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 144 | func (p *parser) parseMaybeRule(line string, semicolonIndex int) AST { |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 145 | if len(strings.TrimSpace(line)) == 0 { |
| 146 | return nil |
| 147 | } |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 148 | |
Shinichiro Hamaji | 19f4bf6 | 2015-04-02 04:55:57 +0900 | [diff] [blame] | 149 | ast := &MaybeRuleAST{} |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 150 | if i := semicolonIndex; i >= 0 { |
Shinichiro Hamaji | 19f4bf6 | 2015-04-02 04:55:57 +0900 | [diff] [blame] | 151 | ast.expr = line[:i] |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 152 | ast.cmd = strings.TrimSpace(line[i+1:]) |
Shinichiro Hamaji | 19f4bf6 | 2015-04-02 04:55:57 +0900 | [diff] [blame] | 153 | } else { |
| 154 | ast.expr = line |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 155 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 156 | ast.filename = p.mk.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 157 | ast.lineno = p.lineno |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 158 | /* |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 159 | ast.cmdLineno = p.elineno + 1 |
| 160 | for { |
| 161 | line := p.readRecipeLine() |
| 162 | if len(line) == 0 { |
| 163 | break |
| 164 | } else if line[0] == '\t' { |
| 165 | ast.cmds = append(ast.cmds, string(bytes.TrimLeft(line, " \t"))) |
| 166 | } else { |
| 167 | p.unreadLine(line) |
| 168 | break |
| 169 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 170 | } |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 171 | */ |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 172 | return ast |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 173 | } |
| 174 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 175 | func (p *parser) parseInclude(line string, oplen int) AST { |
| 176 | ast := &IncludeAST{ |
| 177 | expr: line[oplen+1:], |
| 178 | op: line[:oplen], |
| 179 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 180 | ast.filename = p.mk.filename |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 181 | ast.lineno = p.lineno |
| 182 | return ast |
| 183 | } |
| 184 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 185 | func (p *parser) parseIfdef(line string, oplen int) AST { |
| 186 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 187 | op: line[:oplen], |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 188 | lhs: strings.TrimSpace(line[oplen+1:]), |
| 189 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 190 | ast.filename = p.mk.filename |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 191 | ast.lineno = p.lineno |
| 192 | p.addStatement(ast) |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 193 | p.ifStack = append(p.ifStack, ifState{ast: ast, numNest: p.numIfNest}) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 194 | p.outStmts = &ast.trueStmts |
| 195 | return ast |
| 196 | } |
| 197 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 198 | func closeParen(ch byte) (byte, error) { |
| 199 | switch ch { |
| 200 | case '(': |
| 201 | return ')', nil |
| 202 | case '{': |
| 203 | return '}', nil |
| 204 | default: |
| 205 | return 0, fmt.Errorf("unexpected paren %c", ch) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 206 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 207 | } |
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 | // parseExpr parses s as expr. |
| 210 | // The expr should starts with '(' or '{' and returns strings |
| 211 | // separeted by ',' before ')' or '}' respectively, and an index for the rest. |
| 212 | func parseExpr(s string) ([]string, int, error) { |
| 213 | if len(s) == 0 { |
| 214 | return nil, 0, errors.New("empty expr") |
| 215 | } |
| 216 | paren, err := closeParen(s[0]) |
| 217 | if err != nil { |
| 218 | return nil, 0, err |
| 219 | } |
| 220 | parenCnt := make(map[byte]int) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 221 | i := 0 |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 222 | ia := 1 |
| 223 | var args []string |
| 224 | Loop: |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 225 | for { |
| 226 | i++ |
| 227 | if i == len(s) { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 228 | return nil, 0, errors.New("unexpected end of expr") |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 229 | } |
| 230 | ch := s[i] |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 231 | switch ch { |
| 232 | case '(', '{': |
| 233 | cch, err := closeParen(ch) |
| 234 | if err != nil { |
| 235 | return nil, 0, err |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 236 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 237 | parenCnt[cch]++ |
| 238 | case ')', '}': |
| 239 | parenCnt[ch]-- |
| 240 | if ch == paren && parenCnt[ch] < 0 { |
| 241 | break Loop |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 242 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 243 | case ',': |
| 244 | if parenCnt[')'] == 0 && parenCnt['}'] == 0 { |
| 245 | args = append(args, s[ia:i]) |
| 246 | ia = i + 1 |
| 247 | } |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 248 | } |
| 249 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 250 | args = append(args, s[ia:i]) |
| 251 | return args, i + 1, nil |
| 252 | } |
| 253 | |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 254 | func parseTwoQuotes(s string) ([]string, bool) { |
| 255 | toks := splitSpaces(s) |
| 256 | if len(toks) != 2 { |
| 257 | return nil, false |
| 258 | } |
| 259 | var args []string |
| 260 | for _, tok := range toks { |
| 261 | if len(tok) < 2 { |
| 262 | return nil, false |
| 263 | } |
| 264 | ti := len(tok) - 1 |
| 265 | if tok[0] != tok[ti] || (tok[0] != '\'' && tok[ti] != '"') { |
| 266 | return nil, false |
| 267 | } |
| 268 | args = append(args, tok[1:ti]) |
| 269 | } |
| 270 | return args, true |
| 271 | } |
| 272 | |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 273 | func parseEq(s string) (string, string, bool) { |
| 274 | args, _, err := parseExpr(s) |
| 275 | if err != nil { |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 276 | args, ok := parseTwoQuotes(s) |
| 277 | if ok { |
| 278 | return args[0], args[1], true |
| 279 | } |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 280 | return "", "", false |
| 281 | } |
| 282 | if len(args) != 2 { |
| 283 | return "", "", false |
| 284 | } |
| 285 | // TODO: check rest? |
Shinichiro Hamaji | e56f222 | 2015-04-07 05:09:00 +0900 | [diff] [blame] | 286 | return args[0], strings.TrimLeft(args[1], " \t"), true |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 287 | } |
| 288 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 289 | func (p *parser) parseIfeq(line string, oplen int) AST { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 290 | lhs, rhs, ok := parseEq(strings.TrimSpace(line[oplen+1:])) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 291 | if !ok { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 292 | Error(p.mk.filename, p.lineno, `*** invalid syntax in conditional.`) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 293 | } |
| 294 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 295 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 296 | op: line[:oplen], |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 297 | lhs: lhs, |
| 298 | rhs: rhs, |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 299 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 300 | ast.filename = p.mk.filename |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 301 | ast.lineno = p.lineno |
| 302 | p.addStatement(ast) |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 303 | p.ifStack = append(p.ifStack, ifState{ast: ast, numNest: p.numIfNest}) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 304 | p.outStmts = &ast.trueStmts |
| 305 | return ast |
| 306 | } |
| 307 | |
| 308 | func (p *parser) checkIfStack(curKeyword string) { |
| 309 | if len(p.ifStack) == 0 { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 310 | Error(p.mk.filename, p.lineno, `*** extraneous %q.`, curKeyword) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 311 | } |
| 312 | } |
| 313 | |
| 314 | func (p *parser) parseElse(line string) { |
| 315 | p.checkIfStack("else") |
| 316 | state := &p.ifStack[len(p.ifStack)-1] |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 317 | if state.inElse { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 318 | Error(p.mk.filename, p.lineno, `*** only one "else" per conditional.`) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 319 | } |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 320 | state.inElse = true |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 321 | p.outStmts = &state.ast.falseStmts |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 322 | |
| 323 | nextIf := strings.TrimSpace(line[len("else"):]) |
| 324 | if len(nextIf) == 0 { |
| 325 | return |
| 326 | } |
| 327 | var ifDirectives = map[string]func(*parser, string){ |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 328 | "ifdef ": ifdefDirective, |
| 329 | "ifndef ": ifndefDirective, |
| 330 | "ifeq ": ifeqDirective, |
| 331 | "ifneq ": ifneqDirective, |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 332 | } |
| 333 | p.numIfNest = state.numNest + 1 |
| 334 | if p.parseKeywords(nextIf, ifDirectives) { |
| 335 | p.numIfNest = 0 |
| 336 | return |
| 337 | } |
| 338 | p.numIfNest = 0 |
| 339 | WarnNoPrefix(p.mk.filename, p.lineno, "extraneous text after `else` directive") |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | func (p *parser) parseEndif(line string) { |
| 343 | p.checkIfStack("endif") |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 344 | state := p.ifStack[len(p.ifStack)-1] |
| 345 | for t := 0; t <= state.numNest; t++ { |
| 346 | p.ifStack = p.ifStack[0 : len(p.ifStack)-1] |
| 347 | if len(p.ifStack) == 0 { |
| 348 | p.outStmts = &p.mk.stmts |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 349 | } else { |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 350 | state := p.ifStack[len(p.ifStack)-1] |
| 351 | if state.inElse { |
| 352 | p.outStmts = &state.ast.falseStmts |
| 353 | } else { |
| 354 | p.outStmts = &state.ast.trueStmts |
| 355 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 356 | } |
| 357 | } |
| 358 | } |
| 359 | |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 360 | var makeDirectives = map[string]func(*parser, string){ |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 361 | "include ": includeDirective, |
| 362 | "-include ": sincludeDirective, |
| 363 | "sinclude": sincludeDirective, |
| 364 | "ifdef ": ifdefDirective, |
| 365 | "ifndef ": ifndefDirective, |
| 366 | "ifeq ": ifeqDirective, |
| 367 | "ifneq ": ifneqDirective, |
| 368 | "else": elseDirective, |
| 369 | "endif": endifDirective, |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 370 | "define ": defineDirective, |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 371 | } |
| 372 | |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 373 | func (p *parser) parseKeywords(line string, directives map[string]func(*parser, string)) bool { |
Shinichiro Hamaji | e3a9463 | 2015-03-31 01:12:52 +0900 | [diff] [blame] | 374 | stripped := strings.TrimLeft(line, " \t") |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 375 | for prefix, f := range directives { |
| 376 | if strings.HasPrefix(stripped, prefix) { |
| 377 | f(p, stripped) |
| 378 | return true |
| 379 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 380 | } |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 381 | return false |
| 382 | } |
| 383 | |
Shinichiro Hamaji | 74b8cb5 | 2015-04-08 19:47:43 +0900 | [diff] [blame^] | 384 | func (p *parser) isDirective(line string, directives map[string]func(*parser, string)) bool { |
| 385 | stripped := strings.TrimLeft(line, " \t") |
| 386 | for prefix, _ := range directives { |
| 387 | if strings.HasPrefix(stripped, prefix) { |
| 388 | return true |
| 389 | } |
| 390 | } |
| 391 | return false |
| 392 | } |
| 393 | |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 394 | func includeDirective(p *parser, line string) { |
| 395 | p.addStatement(p.parseInclude(line, len("include"))) |
| 396 | } |
| 397 | |
| 398 | func sincludeDirective(p *parser, line string) { |
| 399 | p.addStatement(p.parseInclude(line, len("-include"))) |
| 400 | } |
| 401 | |
| 402 | func ifdefDirective(p *parser, line string) { |
| 403 | p.parseIfdef(line, len("ifdef")) |
| 404 | } |
| 405 | |
| 406 | func ifndefDirective(p *parser, line string) { |
| 407 | p.parseIfdef(line, len("ifndef")) |
| 408 | } |
| 409 | |
| 410 | func ifeqDirective(p *parser, line string) { |
| 411 | p.parseIfeq(line, len("ifeq")) |
| 412 | } |
| 413 | |
| 414 | func ifneqDirective(p *parser, line string) { |
| 415 | p.parseIfeq(line, len("ifneq")) |
| 416 | } |
| 417 | |
| 418 | func elseDirective(p *parser, line string) { |
| 419 | p.parseElse(line) |
| 420 | } |
| 421 | |
| 422 | func endifDirective(p *parser, line string) { |
| 423 | p.parseEndif(line) |
| 424 | } |
| 425 | |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 426 | func defineDirective(p *parser, line string) { |
| 427 | p.inDef = []string{strings.TrimLeft(line[len("define "):], " \t")} |
| 428 | } |
| 429 | |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 430 | func (p *parser) parse() (mk Makefile, err error) { |
| 431 | defer func() { |
| 432 | if r := recover(); r != nil { |
| 433 | err = fmt.Errorf("panic: %v", r) |
| 434 | } |
| 435 | }() |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 436 | for !p.done { |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 437 | line := p.readLine() |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 438 | |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 439 | if len(p.inDef) > 0 { |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 440 | line = p.processMakefileLine(line) |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 441 | if strings.TrimLeft(string(line), " ") == "endef" { |
| 442 | Log("multilineAssign %q", p.inDef) |
| 443 | ast := &AssignAST{ |
| 444 | lhs: p.inDef[0], |
| 445 | rhs: strings.Join(p.inDef[1:], "\n"), |
| 446 | op: "=", |
| 447 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 448 | ast.filename = p.mk.filename |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 449 | ast.lineno = p.lineno - len(p.inDef) |
| 450 | p.addStatement(ast) |
| 451 | p.inDef = nil |
| 452 | continue |
| 453 | } |
| 454 | p.inDef = append(p.inDef, string(line)) |
| 455 | continue |
| 456 | } |
| 457 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 458 | if len(line) == 0 { |
| 459 | continue |
| 460 | } |
Shinichiro Hamaji | 74b8cb5 | 2015-04-08 19:47:43 +0900 | [diff] [blame^] | 461 | |
| 462 | if p.isDirective(string(line), makeDirectives) { |
| 463 | line = p.processMakefileLine(line) |
| 464 | p.parseKeywords(string(line), makeDirectives) |
| 465 | continue |
| 466 | } |
| 467 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 468 | if line[0] == '\t' { |
| 469 | ast := &CommandAST{cmd: string(p.processRecipeLine(line[1:]))} |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 470 | ast.filename = p.mk.filename |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 471 | ast.lineno = p.lineno |
| 472 | p.addStatement(ast) |
| 473 | continue |
| 474 | } |
| 475 | |
| 476 | line = p.processMakefileLine(line) |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 477 | |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 478 | var ast AST |
Shinichiro Hamaji | 34e2324 | 2015-04-06 15:44:50 +0900 | [diff] [blame] | 479 | var parenStack []byte |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 480 | semicolonIndex := -1 |
| 481 | isRule := false |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 482 | for i, ch := range line { |
| 483 | switch ch { |
Shinichiro Hamaji | 34e2324 | 2015-04-06 15:44:50 +0900 | [diff] [blame] | 484 | case '(', '{': |
| 485 | parenStack = append(parenStack, ch) |
| 486 | case ')', '}': |
| 487 | if len(parenStack) == 0 { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 488 | Warn(p.mk.filename, p.lineno, "Unmatched parens: %s", line) |
Shinichiro Hamaji | 34e2324 | 2015-04-06 15:44:50 +0900 | [diff] [blame] | 489 | } else { |
| 490 | parenStack = parenStack[:len(parenStack)-1] |
| 491 | } |
| 492 | } |
| 493 | if len(parenStack) > 0 { |
| 494 | continue |
| 495 | } |
| 496 | |
| 497 | switch ch { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 498 | case ':': |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 499 | if i+1 < len(line) && line[i+1] == '=' { |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 500 | ast = p.parseAssign(line, i, i+2) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 501 | } else { |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 502 | isRule = true |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 503 | } |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 504 | case ';': |
| 505 | semicolonIndex = i |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 506 | case '=': |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 507 | if !isRule { |
| 508 | ast = p.parseAssign(line, i, i+1) |
| 509 | } |
Shinichiro Hamaji | 69b7f65 | 2015-03-31 01:01:59 +0900 | [diff] [blame] | 510 | case '?', '+': |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 511 | if !isRule && i+1 < len(line) && line[i+1] == '=' { |
Shinichiro Hamaji | 69b7f65 | 2015-03-31 01:01:59 +0900 | [diff] [blame] | 512 | ast = p.parseAssign(line, i, i+2) |
| 513 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 514 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 515 | if ast != nil { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 516 | p.addStatement(ast) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 517 | break |
| 518 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 519 | } |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 520 | if ast == nil { |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 521 | ast = p.parseMaybeRule(string(line), semicolonIndex) |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 522 | if ast != nil { |
| 523 | p.addStatement(ast) |
| 524 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 525 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 526 | } |
| 527 | return p.mk, nil |
| 528 | } |
| 529 | |
| 530 | func ParseMakefile(filename string) (Makefile, error) { |
| 531 | f, err := os.Open(filename) |
| 532 | if err != nil { |
| 533 | return Makefile{}, err |
| 534 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 535 | defer f.Close() |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 536 | parser := newParser(f, filename) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 537 | return parser.parse() |
| 538 | } |
| 539 | |
| 540 | func ParseDefaultMakefile() (Makefile, error) { |
| 541 | candidates := []string{"GNUmakefile", "makefile", "Makefile"} |
| 542 | for _, filename := range candidates { |
| 543 | if exists(filename) { |
| 544 | return ParseMakefile(filename) |
| 545 | } |
| 546 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 547 | return Makefile{}, errors.New("no targets specified and no makefile found.") |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 548 | } |
Shinichiro Hamaji | c384081 | 2015-04-02 02:10:20 +0900 | [diff] [blame] | 549 | |
Shinichiro Hamaji | 29ffc97 | 2015-04-06 16:13:27 +0900 | [diff] [blame] | 550 | func ParseMakefileString(s string, name string, lineno int) (Makefile, error) { |
Shinichiro Hamaji | a5dee37 | 2015-04-03 16:41:30 +0900 | [diff] [blame] | 551 | rd := strings.NewReader(s) |
| 552 | parser := newParser(rd, name) |
Shinichiro Hamaji | 29ffc97 | 2015-04-06 16:13:27 +0900 | [diff] [blame] | 553 | parser.lineno = lineno - 1 |
| 554 | parser.elineno = lineno |
Shinichiro Hamaji | a5dee37 | 2015-04-03 16:41:30 +0900 | [diff] [blame] | 555 | return parser.parse() |
Shinichiro Hamaji | c384081 | 2015-04-02 02:10:20 +0900 | [diff] [blame] | 556 | } |