Mercurial > yakumo_izuru > aya

annotate zs_util.go @ 31:b2f491299cee draft

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dead end with template functions
author zaitsev.serge
date Wed, 02 Sep 2015 14:54:16 +0000
parents d052f3a44195
children
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23
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1 package main
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2
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3 import (
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4 "bytes"
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5 "io"
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6 "io/ioutil"
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7 "log"
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8 "os"
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9 "os/exec"
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10 "path/filepath"
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11 "strings"
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12 )
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13
31
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14 func makeFuncs(funcs Funcs, vars Vars) Funcs {
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15 f := Funcs{}
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16 for k, v := range funcs {
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17 f[k] = v
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18 }
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19 for k, v := range vars {
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20 f[k] = varFunc(v)
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21 }
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22 // Plugin functions
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23 files, _ := ioutil.ReadDir(ZSDIR)
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24 for _, file := range files {
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25 if !file.IsDir() {
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26 name := file.Name()
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27 if !strings.HasSuffix(name, ".html") && !strings.HasSuffix(name, ".amber") {
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28 f[renameExt(name, "", "")] = pluginFunc(name, vars)
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29 } else {
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30 f[renameExt(name, "", "")] = partialFunc(name, f, vars)
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31 }
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32 }
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33 }
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34 return f
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35 }
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36
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37 func varFunc(s string) func() string {
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38 return func() string {
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39 return s
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40 }
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41 }
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42
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43 func pluginFunc(cmd string, vars Vars) func(args ...string) string {
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44 return func(args ...string) string {
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45 out := bytes.NewBuffer(nil)
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46 if err := run(filepath.Join(ZSDIR, cmd), args, vars, out); err != nil {
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47 return cmd + ":" + err.Error()
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48 } else {
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49 return string(out.Bytes())
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50 }
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51 }
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52 }
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53
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54 func partialFunc(name string, funcs Funcs, vars Vars) func() string {
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55 return func() string {
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56 var err error
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57 w := bytes.NewBuffer(nil)
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58 if strings.HasSuffix(name, ".amber") {
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59 err = buildAmber(filepath.Join(ZSDIR, name), w, funcs, vars)
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60 } else {
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61 err = buildHTML(filepath.Join(ZSDIR, name), w, funcs, vars)
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62 }
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63 if err != nil {
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64 return name + ":" + err.Error()
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65 }
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66 return string(w.Bytes())
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67 }
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68 }
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69
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70 func builtins() Funcs {
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71 exec := func(cmd string, args ...string) string {
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72 out := bytes.NewBuffer(nil)
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73 if err := run(cmd, args, Vars{}, out); err != nil {
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74 return cmd + ":" + err.Error()
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75 } else {
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76 return string(out.Bytes())
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77 }
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78 return ""
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79 }
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80 return Funcs{
31
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81 "exec": exec,
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82 "var": Var,
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83 "lorem": Lorem,
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84 "dateparse": DateParse,
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85 "datefmt": DateFmt,
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86 "wc": WordCount,
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87 "ttr": TimeToRead,
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88 "ls": List,
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89 "...": func(args ...string) []string {
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90 return append([]string{"..."}, args...)
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91 },
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92 "sort": func(args ...string) []string {
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93
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94 return Sort(args...)
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95 },
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96 }
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97 }
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98
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99 func renameExt(path, from, to string) string {
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100 if from == "" {
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101 from = filepath.Ext(path)
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102 }
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103 if strings.HasSuffix(path, from) {
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104 return strings.TrimSuffix(path, from) + to
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105 } else {
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106 return path
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107 }
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108 }
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109
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110 func globals() Vars {
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111 vars := Vars{}
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112 for _, e := range os.Environ() {
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113 pair := strings.Split(e, "=")
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114 if strings.HasPrefix(pair[0], "ZS_") {
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115 vars[strings.ToLower(pair[0][3:])] = pair[1]
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116 }
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117 }
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118 return vars
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119 }
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120
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121 // Converts zs markdown variables into environment variables
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122 func env(vars Vars) []string {
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123 env := []string{"ZS=" + os.Args[0], "ZS_OUTDIR=" + PUBDIR}
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124 env = append(env, os.Environ()...)
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125 if vars != nil {
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126 for k, v := range vars {
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127 env = append(env, "ZS_"+strings.ToUpper(k)+"="+v)
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128 }
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129 }
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130 return env
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131 }
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132
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133 // Runs command with given arguments and variables, intercepts stderr and
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134 // redirects stdout into the given writer
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135 func run(cmd string, args []string, vars Vars, output io.Writer) error {
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136 var errbuf bytes.Buffer
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137 c := exec.Command(cmd, args...)
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138 c.Env = env(vars)
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139 c.Stdout = output
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140 c.Stderr = &errbuf
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141
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142 err := c.Run()
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143
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144 if errbuf.Len() > 0 {
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145 log.Println("ERROR:", errbuf.String())
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146 }
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147
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148 if err != nil {
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149 return err
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150 }
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151 return nil
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152 }
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153
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154 // Splits a string in exactly two parts by delimiter
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155 // If no delimiter is found - the second string is be empty
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156 func split2(s, delim string) (string, string) {
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157 parts := strings.SplitN(s, delim, 2)
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158 if len(parts) == 2 {
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159 return parts[0], parts[1]
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160 } else {
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161 return parts[0], ""
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162 }
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163 }