Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 5 | "fmt" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 6 | "strings" |
| 7 | ) |
| 8 | |
| 9 | type Rule struct { |
| 10 | output string |
| 11 | inputs []string |
| 12 | cmds []string |
Shinichiro Hamaji | 7c4e325 | 2015-03-30 23:04:25 +0900 | [diff] [blame^] | 13 | filename string |
| 14 | lineno int |
| 15 | cmdLineno int |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 16 | } |
| 17 | |
| 18 | type EvalResult struct { |
| 19 | vars map[string]string |
| 20 | rules []*Rule |
| 21 | refs map[string]bool |
| 22 | } |
| 23 | |
| 24 | type Evaluator struct { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 25 | outVars map[string]string |
| 26 | outRules []*Rule |
| 27 | refs map[string]bool |
| 28 | vars map[string]string |
| 29 | curRule *Rule |
Shinichiro Hamaji | 51d53d9 | 2015-03-30 18:32:16 +0900 | [diff] [blame] | 30 | |
Fumitoshi Ukai | f2f8456 | 2015-03-30 19:47:45 +0900 | [diff] [blame] | 31 | funcs map[string]Func |
| 32 | |
Shinichiro Hamaji | 51d53d9 | 2015-03-30 18:32:16 +0900 | [diff] [blame] | 33 | filename string |
| 34 | lineno int |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 35 | } |
| 36 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 37 | func newEvaluator(vars map[string]string) *Evaluator { |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 38 | return &Evaluator{ |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 39 | outVars: make(map[string]string), |
| 40 | refs: make(map[string]bool), |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 41 | vars: vars, |
Fumitoshi Ukai | f2f8456 | 2015-03-30 19:47:45 +0900 | [diff] [blame] | 42 | funcs: map[string]Func{ |
| 43 | "wildcard": funcWildcard, |
| 44 | "shell": funcShell, |
| 45 | "warning": funcWarning, |
| 46 | }, |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 47 | } |
| 48 | } |
| 49 | |
| 50 | func (ev *Evaluator) evalFunction(ex string) (string, bool) { |
Fumitoshi Ukai | f2f8456 | 2015-03-30 19:47:45 +0900 | [diff] [blame] | 51 | i := strings.IndexAny(ex, " \t") |
| 52 | if i < 0 { |
| 53 | return "", false |
| 54 | } |
| 55 | cmd := strings.TrimSpace(ex[:i]) |
| 56 | args := strings.TrimLeft(ex[i+1:], " \t") |
| 57 | if f, ok := ev.funcs[cmd]; ok { |
| 58 | return f(ev, args), true |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 59 | } |
| 60 | return "", false |
| 61 | } |
| 62 | |
| 63 | func (ev *Evaluator) evalExprSlice(ex string, term byte) (string, int) { |
| 64 | var buf bytes.Buffer |
| 65 | i := 0 |
| 66 | for i < len(ex) && ex[i] != term { |
| 67 | ch := ex[i] |
| 68 | i++ |
| 69 | switch ch { |
| 70 | case '$': |
| 71 | if i >= len(ex) || ex[i] == term { |
| 72 | continue |
| 73 | } |
| 74 | |
| 75 | var varname string |
| 76 | switch ex[i] { |
| 77 | case '@': |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 78 | buf.WriteString(ev.curRule.output) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 79 | i++ |
| 80 | continue |
| 81 | case '(': |
| 82 | v, j := ev.evalExprSlice(ex[i+1:], ')') |
| 83 | i += j + 2 |
| 84 | if r, done := ev.evalFunction(v); done { |
| 85 | buf.WriteString(r) |
| 86 | continue |
| 87 | } |
| 88 | |
| 89 | varname = v |
| 90 | default: |
| 91 | varname = string(ex[i]) |
| 92 | i++ |
| 93 | } |
| 94 | |
| 95 | value, present := ev.vars[varname] |
| 96 | if !present { |
| 97 | ev.refs[varname] = true |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 98 | value = ev.outVars[varname] |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 99 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 100 | buf.WriteString(ev.evalExpr(value)) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 101 | |
| 102 | default: |
| 103 | buf.WriteByte(ch) |
| 104 | } |
| 105 | } |
| 106 | return buf.String(), i |
| 107 | } |
| 108 | |
| 109 | func (ev *Evaluator) evalExpr(ex string) string { |
| 110 | r, i := ev.evalExprSlice(ex, 0) |
| 111 | if len(ex) != i { |
| 112 | panic("Had a null character?") |
| 113 | } |
| 114 | return r |
| 115 | } |
| 116 | |
| 117 | func (ev *Evaluator) evalAssign(ast *AssignAST) { |
Shinichiro Hamaji | 51d53d9 | 2015-03-30 18:32:16 +0900 | [diff] [blame] | 118 | ev.filename = ast.filename |
| 119 | ev.lineno = ast.lineno |
| 120 | |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 121 | lhs := ev.evalExpr(ast.lhs) |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 122 | rhs := ast.evalRHS(ev) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 123 | Log("ASSIGN: %s=%s", lhs, rhs) |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 124 | ev.outVars[lhs] = rhs |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | func (ev *Evaluator) evalRule(ast *RuleAST) { |
Shinichiro Hamaji | 51d53d9 | 2015-03-30 18:32:16 +0900 | [diff] [blame] | 128 | ev.filename = ast.filename |
| 129 | ev.lineno = ast.lineno |
| 130 | |
Shinichiro Hamaji | 7c4e325 | 2015-03-30 23:04:25 +0900 | [diff] [blame^] | 131 | ev.curRule = &Rule{ |
| 132 | filename: ast.filename, |
| 133 | lineno: ast.lineno, |
| 134 | cmdLineno: ast.cmdLineno, |
| 135 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 136 | lhs := ev.evalExpr(ast.lhs) |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 137 | ev.curRule.output = lhs |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 138 | rhs := ev.evalExpr(ast.rhs) |
| 139 | if rhs != "" { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 140 | ev.curRule.inputs = strings.Split(rhs, " ") |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 141 | } |
| 142 | var cmds []string |
| 143 | for _, cmd := range ast.cmds { |
| 144 | cmds = append(cmds, ev.evalExpr(cmd)) |
| 145 | } |
| 146 | Log("RULE: %s=%s", lhs, rhs) |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 147 | ev.curRule.cmds = cmds |
| 148 | ev.outRules = append(ev.outRules, ev.curRule) |
| 149 | ev.curRule = nil |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 150 | } |
| 151 | |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 152 | func (ev *Evaluator) evalRawExpr(ast *RawExprAST) { |
Shinichiro Hamaji | 51d53d9 | 2015-03-30 18:32:16 +0900 | [diff] [blame] | 153 | ev.filename = ast.filename |
| 154 | ev.lineno = ast.lineno |
| 155 | |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 156 | result := ev.evalExpr(ast.expr) |
| 157 | if result != "" { |
Shinichiro Hamaji | 91b105c | 2015-03-30 18:39:05 +0900 | [diff] [blame] | 158 | // TODO: Fix rule_in_var.mk. |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 159 | fmt.Printf("%s:%d: *** missing separator. Stop.\n", ast.filename, ast.lineno) |
| 160 | } |
| 161 | } |
| 162 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 163 | func (ev *Evaluator) getVars() map[string]string { |
| 164 | vars := make(map[string]string) |
| 165 | for k, v := range ev.vars { |
| 166 | vars[k] = v |
| 167 | } |
| 168 | for k, v := range ev.outVars { |
| 169 | vars[k] = v |
| 170 | } |
| 171 | return vars |
| 172 | } |
| 173 | |
| 174 | func (ev *Evaluator) evalInclude(ast *IncludeAST) { |
| 175 | ev.filename = ast.filename |
| 176 | ev.lineno = ast.lineno |
| 177 | |
| 178 | // TODO: Handle glob |
| 179 | files := strings.Split(ev.evalExpr(ast.expr), " ") |
| 180 | for _, file := range files { |
| 181 | mk, err := ParseMakefile(file) |
| 182 | if err != nil { |
| 183 | if ast.op == "include" { |
| 184 | panic(err) |
| 185 | } else { |
| 186 | continue |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | er, err2 := Eval(mk, ev.getVars()) |
| 191 | if err2 != nil { |
| 192 | panic(err2) |
| 193 | } |
| 194 | |
| 195 | for k, v := range er.vars { |
| 196 | ev.outVars[k] = v |
| 197 | } |
| 198 | for _, r := range er.rules { |
| 199 | ev.outRules = append(ev.outRules, r) |
| 200 | } |
| 201 | for r, _ := range er.refs { |
| 202 | ev.refs[r] = true |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 207 | func (ev *Evaluator) eval(ast AST) { |
Fumitoshi Ukai | e34c179 | 2015-03-30 17:53:47 +0900 | [diff] [blame] | 208 | ast.eval(ev) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 209 | } |
| 210 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 211 | func Eval(mk Makefile, vars map[string]string) (er *EvalResult, err error) { |
| 212 | ev := newEvaluator(vars) |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 213 | defer func() { |
| 214 | if r := recover(); r != nil { |
| 215 | err = fmt.Errorf("panic: %v", r) |
| 216 | } |
| 217 | }() |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 218 | for _, stmt := range mk.stmts { |
| 219 | ev.eval(stmt) |
| 220 | } |
| 221 | return &EvalResult{ |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 222 | vars: ev.outVars, |
| 223 | rules: ev.outRules, |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 224 | refs: ev.refs, |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 225 | }, nil |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 226 | } |