Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "fmt" |
| 6 | "os" |
| 7 | "strings" |
| 8 | ) |
| 9 | |
| 10 | type NinjaGenerator struct { |
| 11 | f *os.File |
| 12 | nodes []*DepNode |
| 13 | vars Vars |
| 14 | ex *Executor |
| 15 | ruleId int |
| 16 | done map[string]bool |
| 17 | } |
| 18 | |
| 19 | func NewNinjaGenerator(g *DepGraph) *NinjaGenerator { |
| 20 | f, err := os.Create("build.ninja") |
| 21 | if err != nil { |
| 22 | panic(err) |
| 23 | } |
| 24 | return &NinjaGenerator{ |
| 25 | f: f, |
| 26 | nodes: g.nodes, |
| 27 | vars: g.vars, |
| 28 | done: make(map[string]bool), |
| 29 | } |
| 30 | } |
| 31 | |
Shinichiro Hamaji | 246cd23 | 2015-05-27 17:08:23 +0900 | [diff] [blame] | 32 | func stripShellComment(s string) string { |
| 33 | if strings.IndexByte(s, '#') < 0 { |
| 34 | // Fast path. |
| 35 | return s |
| 36 | } |
| 37 | var escape bool |
| 38 | var quote rune |
| 39 | for i, c := range s { |
| 40 | if quote > 0 { |
| 41 | if quote == c && (quote == '\'' || !escape) { |
| 42 | quote = 0 |
| 43 | } |
| 44 | } else if !escape { |
| 45 | if c == '#' { |
| 46 | return s[:i] |
| 47 | } else if c == '\'' || c == '"' || c == '`' { |
| 48 | quote = c |
| 49 | } |
| 50 | } |
| 51 | if escape { |
| 52 | escape = false |
| 53 | } else if c == '\\' { |
| 54 | escape = true |
| 55 | } else { |
| 56 | escape = false |
| 57 | } |
| 58 | } |
| 59 | return s |
| 60 | } |
| 61 | |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 62 | func genShellScript(runners []runner) string { |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 63 | var buf bytes.Buffer |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 64 | for i, r := range runners { |
| 65 | if i > 0 { |
| 66 | if runners[i-1].ignoreError { |
| 67 | buf.WriteString(" ; ") |
| 68 | } else { |
| 69 | buf.WriteString(" && ") |
| 70 | } |
| 71 | } |
Shinichiro Hamaji | 246cd23 | 2015-05-27 17:08:23 +0900 | [diff] [blame] | 72 | cmd := stripShellComment(r.cmd) |
| 73 | cmd = trimLeftSpace(cmd) |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 74 | cmd = strings.Replace(cmd, "\\\n", " ", -1) |
| 75 | cmd = strings.TrimRight(cmd, " \t\n;") |
| 76 | cmd = strings.Replace(cmd, "$", "$$", -1) |
| 77 | cmd = strings.Replace(cmd, "\t", " ", -1) |
Shinichiro Hamaji | 501f68e | 2015-05-27 17:33:41 +0900 | [diff] [blame^] | 78 | if cmd == "" { |
| 79 | cmd = "true" |
| 80 | } |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 81 | buf.WriteString(cmd) |
| 82 | if i == len(runners)-1 && r.ignoreError { |
| 83 | buf.WriteString(" ; true") |
| 84 | } |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 85 | } |
| 86 | return buf.String() |
| 87 | } |
| 88 | |
Shinichiro Hamaji | fd87216 | 2015-05-26 18:06:48 +0900 | [diff] [blame] | 89 | func (n *NinjaGenerator) genRuleName() string { |
| 90 | ruleName := fmt.Sprintf("rule%d", n.ruleId) |
| 91 | n.ruleId++ |
| 92 | return ruleName |
| 93 | } |
| 94 | |
| 95 | func (n *NinjaGenerator) emitBuild(output, rule, dep string) { |
| 96 | fmt.Fprintf(n.f, "build %s: %s", output, rule) |
| 97 | if dep != "" { |
| 98 | fmt.Fprintf(n.f, " %s", dep) |
| 99 | } |
| 100 | fmt.Fprintf(n.f, "\n") |
| 101 | } |
| 102 | |
| 103 | func getDepString(node *DepNode) string { |
| 104 | var deps []string |
| 105 | var orderOnlys []string |
| 106 | for _, d := range node.Deps { |
| 107 | if d.IsOrderOnly { |
| 108 | orderOnlys = append(orderOnlys, d.Output) |
| 109 | } else { |
| 110 | deps = append(deps, d.Output) |
| 111 | } |
| 112 | } |
| 113 | dep := "" |
| 114 | if len(deps) > 0 { |
| 115 | dep += fmt.Sprintf(" %s", strings.Join(deps, " ")) |
| 116 | } |
| 117 | if len(orderOnlys) > 0 { |
| 118 | dep += fmt.Sprintf(" || %s", strings.Join(orderOnlys, " ")) |
| 119 | } |
| 120 | return dep |
| 121 | } |
| 122 | |
| 123 | func genIntermediateTargetName(o string, i int) string { |
| 124 | return fmt.Sprintf(".make_targets/%s@%d", o, i) |
| 125 | } |
| 126 | |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 127 | func (n *NinjaGenerator) emitNode(node *DepNode) { |
| 128 | if n.done[node.Output] { |
| 129 | return |
| 130 | } |
| 131 | n.done[node.Output] = true |
| 132 | |
Shinichiro Hamaji | fd4aaa0 | 2015-05-26 15:40:53 +0900 | [diff] [blame] | 133 | if len(node.Cmds) == 0 && len(node.Deps) == 0 && !node.IsPhony { |
| 134 | return |
| 135 | } |
| 136 | |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 137 | runners, _ := n.ex.createRunners(node, true) |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 138 | ruleName := "phony" |
| 139 | if len(runners) > 0 { |
| 140 | ruleName = n.genRuleName() |
| 141 | fmt.Fprintf(n.f, "rule %s\n", ruleName) |
| 142 | fmt.Fprintf(n.f, " description = build $out\n") |
Shinichiro Hamaji | fd87216 | 2015-05-26 18:06:48 +0900 | [diff] [blame] | 143 | |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 144 | ss := genShellScript(runners) |
| 145 | // It seems Linux is OK with ~130kB. |
| 146 | // TODO: Find this number automatically. |
| 147 | ArgLenLimit := 100 * 1000 |
| 148 | if len(ss) > ArgLenLimit { |
| 149 | fmt.Fprintf(n.f, " rspfile = $out.rsp\n") |
| 150 | fmt.Fprintf(n.f, " rspfile_content = %s\n", ss) |
| 151 | ss = "sh $out.rsp" |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 152 | } |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 153 | fmt.Fprintf(n.f, " command = %s\n", ss) |
| 154 | |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 155 | } |
Shinichiro Hamaji | a546779 | 2015-05-27 16:28:40 +0900 | [diff] [blame] | 156 | n.emitBuild(node.Output, ruleName, getDepString(node)) |
Shinichiro Hamaji | 6aa86ac | 2015-05-26 15:21:11 +0900 | [diff] [blame] | 157 | |
| 158 | for _, d := range node.Deps { |
| 159 | n.emitNode(d) |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | func (n *NinjaGenerator) run() { |
| 164 | n.ex = NewExecutor(n.vars) |
| 165 | for _, node := range n.nodes { |
| 166 | n.emitNode(node) |
| 167 | } |
| 168 | n.f.Close() |
| 169 | } |
| 170 | |
| 171 | func GenerateNinja(g *DepGraph) { |
| 172 | NewNinjaGenerator(g).run() |
| 173 | } |