Mercurial > dottes
annotate abcfield.py @ 734:e896cf93fe98
Remove vestiges of support for stdin input to abcfield.py.
I'm not using it, and it complicates things a bit.
author | Jim Hague <jim.hague@acm.org> |
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date | Thu, 12 Oct 2017 13:29:50 +0100 (2017-10-12) |
parents | 841f7c19cb55 |
children | 68f926e61d16 |
rev | line source |
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1 #!/usr/bin/env python3 |
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2 # |
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3 # Extact a text field (title, by default) from a .abc file, and print it out |
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4 # with any ABC accented characters converted to HTML (default) or Latex. |
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5 # |
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6 # Optionally rearrange a field into display format: |
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7 # * In Title fields, change 'sort' form such as 'Exploding Potato, The' |
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8 # to display format 'The Exploding Potato'. |
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9 # * In Key fields, translate the ABC key representation to full text, |
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10 # e.g. G#dor becomes G# Dorian. |
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11 # |
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12 # Recognise continuation header fields and print those too. The ABC standard |
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13 # defines continuation fields as starting ':+'. Regrettably none of the tools |
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14 # I am using the Booke recognise that syntax, so I am adopting a Booke |
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15 # convention of '<header>:+' *also* being a continuation. Note that a |
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16 # continuation is a distinct line in the field value; the value has a line |
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17 # break between it and the previous line. |
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18 # |
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19 |
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20 import argparse |
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21 import pathlib |
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22 import re |
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23 import subprocess |
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24 import sys |
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25 |
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26 accentedletters = { |
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27 # Acute accents |
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28 "'A" : ("Á", "\\'{A}"), |
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29 "'E" : ("É", "\\'{E}"), |
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30 "'I" : ("Í", "\\'{I}"), |
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31 "'O" : ("Ó", "\\'{O}"), |
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32 "'U" : ("Ú", "\\'{U}"), |
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33 "'Y" : ("Ý", "\\'{Y}"), |
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34 "'a" : ("á", "\\'{a}"), |
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35 "'e" : ("é", "\\'{e}"), |
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36 "'i" : ("í", "\\'{i}"), |
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37 "'o" : ("ó", "\\'{o}"), |
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38 "'u" : ("ú", "\\'{u}"), |
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39 "'y" : ("ý", "\\'{y}"), |
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40 |
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41 # Grave accents |
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42 "`A" : ("À", "\\`{A}"), |
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43 "`E" : ("È", "\\`{E}"), |
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44 "`I" : ("Ì", "\\`{I}"), |
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45 "`O" : ("Ò", "\\`{O}"), |
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46 "`U" : ("Ù", "\\`{U}"), |
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47 "`a" : ("à", "\\`{a}"), |
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48 "`e" : ("è", "\\`{e}"), |
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49 "`i" : ("ì", "\\`{i}"), |
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50 "`o" : ("ò", "\\`{o}"), |
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51 "`u" : ("ù", "\\`{u}"), |
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52 |
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53 # Umlauts |
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54 "\"A" : ("Ä", "\\\"{A}"), |
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55 "\"E" : ("Ë", "\\\"{E}"), |
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56 "\"I" : ("Ï", "\\\"{I}"), |
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57 "\"O" : ("Ö", "\\\"{O}"), |
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58 "\"U" : ("Ü", "\\\"{U}"), |
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59 "\"Y" : ("Ÿ", "\\\"{Y}"), |
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60 "\"a" : ("ä", "\\\"{a}"), |
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61 "\"e" : ("ë", "\\\"{e}"), |
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62 "\"i" : ("ï", "\\\"{\i}"), |
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63 "\"o" : ("ö", "\\\"{o}"), |
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64 "\"u" : ("ü", "\\\"{u}"), |
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65 "\"y" : ("ÿ", "\\\"{y}"), |
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66 |
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67 # Circumflexes |
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68 "^A" : ("Â", "\\^{A}"), |
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69 "^E" : ("Ê", "\\^{E}"), |
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70 "^I" : ("Î", "\\^{I}"), |
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71 "^O" : ("Ô", "\\^{O}"), |
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72 "^U" : ("Û", "\\^{U}"), |
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73 "^a" : ("â", "\\^{a}"), |
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74 "^e" : ("ê", "\\^{e}"), |
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75 "^i" : ("î", "\\^{\i}"), |
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76 "^o" : ("ô", "\\^{o}"), |
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77 "^u" : ("û", "\\^{u}"), |
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78 |
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79 # Tilde |
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80 "~A" : ("Ã", "\\~{A}"), |
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81 "~N" : ("Ñ", "\\~{N}"), |
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82 "~O" : ("Õ", "\\~{O}"), |
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83 "~a" : ("ã", "\\~{a}"), |
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84 "~n" : ("ñ", "\\~{n}"), |
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85 "~o" : ("õ", "\\~{o}"), |
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86 |
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87 # Cedilla |
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88 ",C" : ("Ç", "\\c{C}"), |
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89 ",c" : ("ç", "\\c{c}"), |
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90 |
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91 # Slash |
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92 "/O" : ("Ø", "\\O"), |
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93 "/o" : ("ø", "\\o"), |
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94 |
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95 # Ring |
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96 "AA" : ("Å", "\\r{A}"), |
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97 "aa" : ("å", "\\r{a}"), |
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98 |
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99 # Ligatures |
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100 "AE" : ("Æ", "\\AE"), |
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101 "ae" : ("æ", "\\ae"), |
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102 "ss" : ("ß", "\\ss"), |
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103 |
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104 # Quote marks |
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105 "''" : ("'", "'"), |
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106 "'\"" : (""", "\""), |
110
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107 } |
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108 |
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109 abckeys = { |
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110 "m": "Minor", |
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111 "min": "Minor", |
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112 "mix": "Mixolydian", |
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113 "dor": "Dorian", |
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114 "phr": "Phrygian", |
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115 "lyd": "Lydian", |
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116 "loc": "Locrian", |
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117 } |
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118 |
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119 # Convert ABC accented chars to HTML entities or LaTex. |
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120 def convertAccents(t, latex=False): |
110
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121 res = "" |
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122 while True: |
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123 p = t.partition('\\') |
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124 res += p[0] |
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125 if p[1] == "": |
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126 break |
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127 abc = p[2][0:2] |
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128 t = p[2][2:] |
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129 if abc in accentedletters: |
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130 if latex: |
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131 res += accentedletters[abc][1] |
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132 else: |
110
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133 res += accentedletters[abc][0] |
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134 else: |
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135 res += "\\" + abc |
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136 return res |
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137 |
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138 # Convert Title fields from sort to display, so Bat, The->The Bat. |
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139 def convertTitleToDisplay(t): |
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140 p = t.rpartition(',') |
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141 if p[1] == "": |
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142 return t |
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143 else: |
701
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144 first = p[2].strip() |
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145 second = p[0].strip() |
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146 return (first + " " if first.isalnum() else first) + second |
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147 |
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148 # Convert Key field from ABC to display, so G#dor->G# Dorian. |
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149 def convertKeyToDisplay(t): |
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150 letter = t[0].upper() |
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151 accidental = "" |
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152 mode = "" |
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153 try: |
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154 accidental = t[1] |
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155 if accidental == '#' or accidental == 'b': |
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156 mode = t[2:] |
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157 else: |
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158 accidental = "" |
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159 mode = t[1:] |
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160 except IndexError: |
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161 pass |
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162 mode = mode.strip().lower() |
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163 return letter + accidental + ' ' + abckeys.get(mode, "Major") |
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164 |
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165 # Convert input string from Markdown to HTML or LaTeX. Fix up link |
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166 # targets so any 'foo.abc' target links to the tune with that name. |
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167 def convertMarkdown(t, latex): |
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168 if latex: |
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169 target = "--to=latex" |
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170 else: |
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171 target = "--to=html" |
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172 res = subprocess.check_output(['pandoc', '--from=markdown', target], input=t, universal_newlines=True) |
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173 if latex: |
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174 res = re.sub(r'\\href{(.*?).abc}', r'\\hyperlink{\1}', res) |
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175 else: |
592
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176 res = re.sub(r'href="(.*?).abc"', r'href="\1.html"', res) |
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177 return res.strip() |
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178 |
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179 # Implement a custom Markdown shorthand for referencing ABC files. |
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180 # <foo.abc> will expand to ['title of foo'](foo.abc). |
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181 def expandCustomMarkdown(t, dir, latex): |
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182 # Given a match to (foo.abc), return a markdown link to the tune with the |
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183 # title (and subtitle, if present) of the tune as the text of the link. |
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184 def getTitleLink(m): |
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185 fname = m.group(1) + ".abc" |
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186 path = pathlib.Path(dir, fname) |
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187 with path.open() as f: |
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188 lines = f.readlines() |
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189 return "[" + getFullTitle(lines, dir, latex=latex) + "](" + fname + ")" |
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190 return re.sub(r'<(.*?).abc>', getTitleLink, t) |
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191 |
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192 # Return the raw text for a given field. Optionally the nth field is taken, |
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193 # or the field data must start with a designated string to be recognised. |
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194 def getFieldText(lines, field, n = 1, starts = None): |
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195 res = "" |
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196 for line in lines: |
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197 line = line.strip() |
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198 if len(line) > 2 and line[1] == ':': |
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199 if line[0] == "+" or (line[0] == field and line[2] == "+"): |
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200 if not res: |
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201 continue |
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202 if line[0] == "+": |
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203 line = line[2:] |
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204 else: |
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205 line = line[3:] |
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206 res = res + '\n' + line.strip() |
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207 else: |
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208 if res: |
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209 break |
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210 if line[0] == field: |
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211 line = line[2:].strip() |
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212 if starts: |
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213 if line.find(starts) != 0: |
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214 continue |
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215 line = line[len(starts):].strip() |
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216 if n > 1: |
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217 n = n - 1 |
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218 continue |
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219 res = line |
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220 return res |
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221 |
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222 # Return display text for a given field. |
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223 def getFieldDisplayText(lines, dir, field, n = 1, starts = None, latex = False): |
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224 res = getFieldText(lines, field, n, starts) |
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225 if res: |
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226 res = convertAccents(res, latex) |
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227 if field.upper() == "T": |
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228 res = convertTitleToDisplay(res) |
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229 elif field.upper() == "K": |
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230 res = convertKeyToDisplay(res) |
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231 elif field.upper() in ["H", "N"]: |
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232 res = convertMarkdown(expandCustomMarkdown(res, dir, latex), latex) |
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233 return res |
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234 |
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235 # Return full title (title + [" (" + subtitle + ")"] if subtitle exists). |
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236 def getFullTitle(lines, dir, starts = None, latex = False): |
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237 title = getFieldDisplayText(lines, dir, "T", starts=starts, latex=latex) |
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238 subtitle = getFieldDisplayText(lines, dir, "T", n=2, starts=starts, latex=latex) |
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239 return title if len(subtitle) == 0 else title + " (" + subtitle + ")" |
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240 |
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241 if __name__ == "__main__": |
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242 def process(f, dir, args): |
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243 lines = f.readlines() |
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244 if args.display: |
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245 if args.field.upper() == "FT": |
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246 line = getFullTitle(lines, dir, args.starts, args.latex) |
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247 else: |
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248 line = getFieldDisplayText(lines, dir, args.field, args.index, args.starts, args.latex) |
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249 else: |
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250 if args.field.upper() == "FT": |
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251 args.field = "T" |
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252 line = getFieldText(lines, args.field, args.index, args.starts) |
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253 if line: |
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254 print(line) |
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255 return True |
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256 else: |
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257 return False |
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258 |
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259 # execute only if run as a script |
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260 parser = argparse.ArgumentParser(description="Extract field data from ABC file.") |
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261 parser.add_argument("-f", "--field", dest="field", default="T", |
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262 help=("extract the given field [default: %(default)s]. " |
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263 "Field FT is special; it returns the full title " |
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264 "- the title followed by subtitle in () if " |
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265 "present - for display text, or just the title " |
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266 "for non-display text.")) |
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267 parser.add_argument("-l", "--latex", dest="latex", |
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268 action="store_true", default=False, |
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269 help="convert special characters for LaTeX (default HTML)") |
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270 parser.add_argument("-d", "--display", dest="display", |
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271 action="store_true", default=False, |
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272 help=("convert to display text. Convert accents to " |
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273 "LaTeX or HTML, in titles convert 'Tune, The' to " |
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274 "'The Tune', convert keys to full key name, " |
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275 "and expand Markdown in notes and history.")) |
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276 parser.add_argument("-n", "--index", dest="index", |
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277 action="store", type=int, default=1, |
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278 help="report INDEXth value [default: %(default)s]") |
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279 parser.add_argument("-s", "--starts", dest="starts", |
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280 action="store", default=None, |
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281 help=("report only if line starts with CONTENT " |
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282 "and remove CONTENT"), |
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283 metavar="CONTENT") |
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284 parser.add_argument('input', type=argparse.FileType('r'), |
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285 help='input ABC file') |
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286 args = parser.parse_args() |
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287 |
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288 path = pathlib.Path(args.input.name) |
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289 with path.open() as f: |
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290 res = process(f, path.parent, args) |
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291 sys.exit(int(not res)) |