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