Mercurial > yakumo_izuru > aya
annotate zs.go @ 6:cb66f5b86616 draft
rewritted default variables assignment
| author | zaitsev.serge |
|---|---|
| date | Fri, 05 Dec 2014 18:26:15 +0000 |
| parents | e0ee0721d34f |
| children | 11073a30f71f |
| rev | line source |
|---|---|
| 0 | 1 package main |
| 2 | |
| 3 import ( | |
| 4 "bytes" | |
| 5 "fmt" | |
| 6 "io" | |
| 7 "io/ioutil" | |
| 8 "log" | |
| 9 "os" | |
| 10 "os/exec" | |
| 11 "path" | |
| 12 "path/filepath" | |
| 13 "strings" | |
| 14 "time" | |
| 15 | |
| 16 "github.com/russross/blackfriday" | |
| 17 ) | |
| 18 | |
| 19 const ( | |
| 20 ZSDIR = ".zs" | |
| 21 PUBDIR = ".pub" | |
| 22 ) | |
| 23 | |
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24 type EvalFn func(args []string, vars map[string]string) (string, error) |
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25 |
| 0 | 26 func split2(s, delim string) (string, string) { |
| 27 parts := strings.SplitN(s, delim, 2) | |
| 28 if len(parts) == 2 { | |
| 29 return parts[0], parts[1] | |
| 30 } else { | |
| 31 return parts[0], "" | |
| 32 } | |
| 33 } | |
| 34 | |
| 6 | 35 func md(path, s string) (map[string]string, string) { |
| 36 url := path[:len(path)-len(filepath.Ext(path))] + ".html" | |
| 37 v := map[string]string{ | |
| 38 "file": path, | |
| 39 "url": url, | |
| 40 "outdir": PUBDIR, | |
| 41 "output": filepath.Join(PUBDIR, url), | |
| 42 "layout": "index.html", | |
| 43 } | |
| 2 | 44 if strings.Index(s, "\n\n") == -1 { |
| 45 return map[string]string{}, s | |
| 46 } | |
| 0 | 47 header, body := split2(s, "\n\n") |
| 48 for _, line := range strings.Split(header, "\n") { | |
| 49 key, value := split2(line, ":") | |
| 50 v[strings.ToLower(strings.TrimSpace(key))] = strings.TrimSpace(value) | |
| 51 } | |
| 6 | 52 if strings.HasPrefix(v["url"], "./") { |
| 53 v["url"] = v["url"][2:] | |
| 54 } | |
| 0 | 55 return v, body |
| 56 } | |
| 57 | |
| 58 func render(s string, vars map[string]string, eval EvalFn) (string, error) { | |
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59 delim_open := "{{" |
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60 delim_close := "}}" |
| 0 | 61 |
| 62 out := bytes.NewBuffer(nil) | |
| 63 for { | |
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64 if from := strings.Index(s, delim_open); from == -1 { |
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65 out.WriteString(s) |
| 0 | 66 return out.String(), nil |
| 67 } else { | |
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68 if to := strings.Index(s, delim_close); to == -1 { |
| 0 | 69 return "", fmt.Errorf("Close delim not found") |
| 70 } else { | |
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71 out.WriteString(s[:from]) |
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72 cmd := s[from+len(delim_open) : to] |
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73 s = s[to+len(delim_close):] |
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74 m := strings.Fields(cmd) |
| 0 | 75 if len(m) == 1 { |
| 76 if v, ok := vars[m[0]]; ok { | |
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77 out.WriteString(v) |
| 0 | 78 continue |
| 79 } | |
| 80 } | |
| 81 if res, err := eval(m, vars); err == nil { | |
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82 out.WriteString(res) |
| 0 | 83 } else { |
| 84 log.Println(err) // silent | |
| 85 } | |
| 86 } | |
| 87 } | |
| 88 } | |
| 89 } | |
| 90 | |
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91 func env(vars map[string]string) []string { |
| 0 | 92 env := []string{"ZS=" + os.Args[0]} |
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93 env = append(env, os.Environ()...) |
| 0 | 94 for k, v := range vars { |
| 95 env = append(env, "ZS_"+strings.ToUpper(k)+"="+v) | |
| 96 } | |
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97 return env |
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98 } |
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99 |
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100 func run(cmd string, args []string, vars map[string]string, output io.Writer) error { |
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101 var errbuf bytes.Buffer |
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102 c := exec.Command(cmd, args...) |
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103 c.Env = env(vars) |
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104 c.Stdout = output |
| 0 | 105 c.Stderr = &errbuf |
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106 |
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107 err := c.Run() |
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108 |
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109 if errbuf.Len() > 0 { |
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110 log.Println(errbuf.String()) |
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111 } |
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112 |
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113 if err != nil { |
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114 return err |
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115 } |
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116 return nil |
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117 } |
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118 |
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119 func eval(cmd []string, vars map[string]string) (string, error) { |
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120 outbuf := bytes.NewBuffer(nil) |
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121 err := run(path.Join(ZSDIR, cmd[0]), cmd[1:], vars, outbuf) |
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122 if err != nil { |
| 5 | 123 if _, ok := err.(*exec.ExitError); ok { |
| 124 return "", err | |
| 125 } | |
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126 outbuf = bytes.NewBuffer(nil) |
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127 err := run(cmd[0], cmd[1:], vars, outbuf) |
| 5 | 128 // Return exit errors, but ignore if the command was not found |
| 129 if _, ok := err.(*exec.ExitError); ok { | |
| 0 | 130 return "", err |
| 131 } | |
| 132 } | |
| 133 return outbuf.String(), nil | |
| 134 } | |
| 135 | |
| 136 func buildMarkdown(path string) error { | |
| 137 b, err := ioutil.ReadFile(path) | |
| 138 if err != nil { | |
| 139 return err | |
| 140 } | |
| 6 | 141 v, body := md(path, string(b)) |
| 0 | 142 content, err := render(body, v, eval) |
| 143 if err != nil { | |
| 144 return err | |
| 145 } | |
| 146 v["content"] = string(blackfriday.MarkdownBasic([]byte(content))) | |
| 147 b, err = ioutil.ReadFile(filepath.Join(ZSDIR, v["layout"])) | |
| 148 if err != nil { | |
| 149 return err | |
| 150 } | |
| 151 content, err = render(string(b), v, eval) | |
| 152 if err != nil { | |
| 153 return err | |
| 154 } | |
| 155 err = ioutil.WriteFile(v["output"], []byte(content), 0666) | |
| 156 if err != nil { | |
| 157 return err | |
| 158 } | |
| 159 return nil | |
| 160 } | |
| 161 | |
| 162 func copyFile(path string) error { | |
| 163 if in, err := os.Open(path); err != nil { | |
| 164 return err | |
| 165 } else { | |
| 166 defer in.Close() | |
| 167 if stat, err := in.Stat(); err != nil { | |
| 168 return err | |
| 169 } else { | |
| 170 // Directory? | |
| 171 if stat.Mode().IsDir() { | |
| 172 os.Mkdir(filepath.Join(PUBDIR, path), 0755) | |
| 173 return nil | |
| 174 } | |
| 175 if !stat.Mode().IsRegular() { | |
| 176 return nil | |
| 177 } | |
| 178 } | |
| 179 if out, err := os.Create(filepath.Join(PUBDIR, path)); err != nil { | |
| 180 return err | |
| 181 } else { | |
| 182 defer out.Close() | |
| 183 _, err = io.Copy(out, in) | |
| 184 return err | |
| 185 } | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 func buildAll(once bool) { | |
| 190 lastModified := time.Unix(0, 0) | |
| 191 for { | |
| 192 os.Mkdir(PUBDIR, 0755) | |
| 193 err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error { | |
| 194 // ignore hidden files and directories | |
| 195 if filepath.Base(path)[0] == '.' || strings.HasPrefix(path, ".") { | |
| 196 return nil | |
| 197 } | |
| 198 | |
| 199 if info.ModTime().After(lastModified) { | |
| 200 ext := filepath.Ext(path) | |
| 201 if ext == ".md" || ext == "mkd" { | |
| 202 log.Println("mkd: ", path) | |
| 203 return buildMarkdown(path) | |
| 204 } else { | |
| 205 log.Println("raw: ", path) | |
| 206 return copyFile(path) | |
| 207 } | |
| 208 } | |
| 209 return nil | |
| 210 }) | |
| 211 if err != nil { | |
| 212 log.Println("ERROR:", err) | |
| 213 } | |
| 214 lastModified = time.Now() | |
| 215 if once { | |
| 216 break | |
| 217 } | |
| 218 time.Sleep(1 * time.Second) | |
| 219 } | |
| 220 } | |
| 221 | |
| 222 func main() { | |
| 223 if len(os.Args) == 1 { | |
| 224 fmt.Println(os.Args[0], "<command> [args]") | |
| 225 return | |
| 226 } | |
| 227 cmd := os.Args[1] | |
| 228 args := os.Args[2:] | |
| 229 switch cmd { | |
| 230 case "build": | |
| 231 buildAll(true) | |
| 232 case "watch": | |
| 233 buildAll(false) // pass duration | |
| 234 case "var": | |
| 235 if len(args) == 0 { | |
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236 log.Println("ERROR: filename expected") |
| 0 | 237 return |
| 238 } | |
| 239 if b, err := ioutil.ReadFile(args[0]); err == nil { | |
| 6 | 240 vars, _ := md(args[0], string(b)) |
| 0 | 241 if len(args) > 1 { |
| 242 for _, a := range args[1:] { | |
| 243 fmt.Println(vars[a]) | |
| 244 } | |
| 245 } else { | |
| 246 for k, v := range vars { | |
| 247 fmt.Println(k + ":" + v) | |
| 248 } | |
| 249 } | |
| 250 } else { | |
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251 log.Println(err) |
| 0 | 252 } |
| 253 default: | |
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254 err := run(path.Join(ZSDIR, cmd), args, map[string]string{}, os.Stdout) |
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255 if err != nil { |
| 0 | 256 log.Println(err) |
| 257 } | |
| 258 } | |
| 259 } |