Mercurial > yakumo_izuru > aya

annotate zs.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 526ba3c717ba
children 75822e38c3e0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 "fmt"
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6 "io"
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7 "io/ioutil"
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8 "log"
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9 "os"
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10 "path"
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11 "path/filepath"
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12 "strings"
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13 "text/template"
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14 "time"
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15
22
f5627d4212a3 restored the original amber since my issue has been fixed
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16 "github.com/eknkc/amber"
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17 "github.com/russross/blackfriday"
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18 "github.com/yosssi/gcss"
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19 )
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20
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21 const (
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22 ZSDIR = ".zs"
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23 PUBDIR = ".pub"
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24 )
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25
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26 type Vars map[string]string
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27 type Funcs template.FuncMap
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28
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29 // Parses markdown content. Returns parsed header variables and content
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30 func md(path string, globals Vars) (Vars, string, error) {
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31 b, err := ioutil.ReadFile(path)
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32 if err != nil {
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33 return nil, "", err
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34 }
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35 s := string(b)
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36 url := path[:len(path)-len(filepath.Ext(path))] + ".html"
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37 v := Vars{
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38 "title": "",
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39 "description": "",
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40 "keywords": "",
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41 }
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42 for name, value := range globals {
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43 v[name] = value
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44 }
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45 if _, err := os.Stat(filepath.Join(ZSDIR, "layout.amber")); err == nil {
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46 v["layout"] = "layout.amber"
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47 } else {
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48 v["layout"] = "layout.html"
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49 }
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50 v["file"] = path
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51 v["url"] = url
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52 v["output"] = filepath.Join(PUBDIR, url)
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53
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54 if strings.Index(s, "\n\n") == -1 {
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55 return v, s, nil
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56 }
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57 header, body := split2(s, "\n\n")
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58 for _, line := range strings.Split(header, "\n") {
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59 key, value := split2(line, ":")
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60 v[strings.ToLower(strings.TrimSpace(key))] = strings.TrimSpace(value)
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61 }
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62 if strings.HasPrefix(v["url"], "./") {
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63 v["url"] = v["url"][2:]
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64 }
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65 return v, body, nil
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66 }
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67
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68 // Use standard Go templates
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69 func render(s string, funcs Funcs, vars Vars) (string, error) {
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70 f := makeFuncs(funcs, vars)
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71 tmpl, err := template.New("").Funcs(template.FuncMap(f)).Parse(s)
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72 if err != nil {
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73 return "", err
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74 }
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75 out := &bytes.Buffer{}
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76 if err := tmpl.Execute(out, vars); err != nil {
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77 return "", err
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78 }
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79 return string(out.Bytes()), nil
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80 }
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81
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82 // Renders markdown with the given layout into html expanding all the macros
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83 func buildMarkdown(path string, w io.Writer, funcs Funcs, vars Vars) error {
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84 v, body, err := md(path, vars)
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85 if err != nil {
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86 return err
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87 }
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88 content, err := render(body, funcs, v)
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89 if err != nil {
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90 return err
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91 }
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92 v["content"] = string(blackfriday.MarkdownCommon([]byte(content)))
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93 if w == nil {
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94 out, err := os.Create(filepath.Join(PUBDIR, renameExt(path, "", ".html")))
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95 if err != nil {
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96 return err
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97 }
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98 defer out.Close()
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99 w = out
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100 }
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101 if strings.HasSuffix(v["layout"], ".amber") {
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102 return buildAmber(filepath.Join(ZSDIR, v["layout"]), w, funcs, v)
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103 } else {
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104 return buildHTML(filepath.Join(ZSDIR, v["layout"]), w, funcs, v)
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105 }
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106 }
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107
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108 // Renders text file expanding all variable macros inside it
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109 func buildHTML(path string, w io.Writer, funcs Funcs, vars Vars) error {
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110 b, err := ioutil.ReadFile(path)
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111 if err != nil {
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112 return err
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113 }
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114 content, err := render(string(b), funcs, vars)
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115 if err != nil {
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116 return err
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117 }
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118 if w == nil {
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119 f, err := os.Create(filepath.Join(PUBDIR, path))
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120 if err != nil {
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121 return err
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122 }
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123 defer f.Close()
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124 w = f
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125 }
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126 _, err = io.WriteString(w, content)
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127 return err
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128 }
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129
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130 // Renders .amber file into .html
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131 func buildAmber(path string, w io.Writer, funcs Funcs, vars Vars) error {
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132 a := amber.New()
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133 err := a.ParseFile(path)
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134 if err != nil {
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135 return err
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136 }
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137
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138 data := map[string]interface{}{}
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139 for k, v := range vars {
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140 data[k] = v
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141 }
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142 for k, v := range makeFuncs(funcs, Vars{}) {
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143 data[k] = v
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144 }
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145
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146 t, err := a.Compile()
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147 if err != nil {
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148 return err
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149 }
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150 if w == nil {
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151 f, err := os.Create(filepath.Join(PUBDIR, renameExt(path, ".amber", ".html")))
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152 if err != nil {
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153 return err
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154 }
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155 defer f.Close()
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156 w = f
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157 }
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158 return t.Execute(w, data)
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159 }
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160
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161 // Compiles .gcss into .css
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162 func buildGCSS(path string, w io.Writer) error {
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163 f, err := os.Open(path)
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164 if err != nil {
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165 return err
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166 }
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167 defer f.Close()
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168
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169 if w == nil {
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170 s := strings.TrimSuffix(path, ".gcss") + ".css"
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171 css, err := os.Create(filepath.Join(PUBDIR, s))
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172 if err != nil {
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173 return err
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174 }
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175 defer css.Close()
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176 w = css
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177 }
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178 _, err = gcss.Compile(w, f)
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179 return err
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180 }
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181
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182 // Copies file as is from path to writer
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183 func buildRaw(path string, w io.Writer) error {
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184 in, err := os.Open(path)
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185 if err != nil {
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186 return err
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187 }
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188 defer in.Close()
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189 if w == nil {
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190 if out, err := os.Create(filepath.Join(PUBDIR, path)); err != nil {
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191 return err
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192 } else {
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193 defer out.Close()
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194 w = out
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195 }
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196 }
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197 _, err = io.Copy(w, in)
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198 return err
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199 }
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200
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201 func build(path string, w io.Writer, funcs Funcs, vars Vars) error {
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202 ext := filepath.Ext(path)
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203 if ext == ".md" || ext == ".mkd" {
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204 return buildMarkdown(path, w, funcs, vars)
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205 } else if ext == ".html" || ext == ".xml" {
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206 return buildHTML(path, w, funcs, vars)
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207 } else if ext == ".amber" {
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208 return buildAmber(path, w, funcs, vars)
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209 } else if ext == ".gcss" {
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210 return buildGCSS(path, w)
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211 } else {
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212 return buildRaw(path, w)
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213 }
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214 }
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215
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216 func buildAll(watch bool) {
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217 lastModified := time.Unix(0, 0)
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218 modified := false
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219
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220 vars := globals()
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221 for {
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222 os.Mkdir(PUBDIR, 0755)
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223 funcs := builtins()
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224 err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
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225 // ignore hidden files and directories
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226 if filepath.Base(path)[0] == '.' || strings.HasPrefix(path, ".") {
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227 return nil
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228 }
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229 // inform user about fs walk errors, but continue iteration
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230 if err != nil {
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231 log.Println("ERROR:", err)
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232 return nil
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233 }
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234
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235 if info.IsDir() {
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236 os.Mkdir(filepath.Join(PUBDIR, path), 0755)
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237 return nil
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238 } else if info.ModTime().After(lastModified) {
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239 if !modified {
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240 // About to be modified, so run pre-build hook
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241 // FIXME on windows it might not work well
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242 run(filepath.Join(ZSDIR, "pre"), []string{}, nil, nil)
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243 modified = true
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244 }
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245 log.Println("build: ", path)
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246 return build(path, nil, funcs, vars)
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247 }
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248 return nil
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249 })
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250 if err != nil {
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251 log.Println("ERROR:", err)
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252 }
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253 if modified {
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254 // Something was modified, so post-build hook
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255 // FIXME on windows it might not work well
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256 run(filepath.Join(ZSDIR, "post"), []string{}, nil, nil)
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257 modified = false
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258 }
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259 if !watch {
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260 break
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261 }
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262 lastModified = time.Now()
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263 time.Sleep(1 * time.Second)
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264 }
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265 }
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266
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267 func main() {
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268 if len(os.Args) == 1 {
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269 fmt.Println(os.Args[0], "<command> [args]")
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270 return
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271 }
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272 cmd := os.Args[1]
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273 args := os.Args[2:]
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274 switch cmd {
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275 case "build":
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276 if len(args) == 0 {
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277 buildAll(false)
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278 } else if len(args) == 1 {
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279 if err := build(args[0], os.Stdout, builtins(), globals()); err != nil {
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280 fmt.Println("ERROR: " + err.Error())
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281 }
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282 } else {
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283 fmt.Println("ERROR: too many arguments")
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284 }
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285 case "watch":
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286 buildAll(true)
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287 case "var":
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288 fmt.Println(Var(args...))
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289 case "lorem":
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290 fmt.Println(Lorem(args...))
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291 case "dateparse":
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292 fmt.Println(DateParse(args...))
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293 case "datefmt":
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294 fmt.Println(DateFmt(args...))
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295 case "wc":
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296 fmt.Println(WordCount(args...))
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297 case "ttr":
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298 fmt.Println(TimeToRead(args...))
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299 case "ls":
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300 fmt.Println(strings.Join(List(args...), "\n"))
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301 case "sort":
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302 fmt.Println(strings.Join(Sort(args...), "\n"))
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303 case "exec":
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304 // TODO
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305 default:
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306 err := run(path.Join(ZSDIR, cmd), args, globals(), os.Stdout)
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307 if err != nil {
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308 log.Println("ERROR:", err)
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309 }
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310 }
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311 }