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annotate python/html2flux.py @ 894:47d50c70ec04

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author Jeff Hammel <k0scist@gmail.com>
date Tue, 06 Jul 2021 08:29:05 -0700
parents e5861cbbc4bb
children
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1 #!/usr/bin/env python
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2
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3 """
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4 transform an HTML <dl> file into a fluxbox menu
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5 if no file give, read from stdin
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6
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7 <dl><a>submenu name</a>
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8 <dt>program label</dt><dd>command</dd>
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9 <dt>another program label</dt><dd>command2</dd>
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10 </dl>
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11
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12 x-form -> internal format:
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13
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14 ('submenu name': [('program label', 'command'),
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15 ('another program label', 'command2')])
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16
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17 - add graphterm: graphterm (should be in ~/k0s/)
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18 * if a menu has a single item, that is *the* implementor to that interface! :)
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19 - display fluxbox menu items by `title` attribute, if possible
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20 * (see class-based usage below)
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21 - something about && for joining
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22 - class-based usage (class="shell|...")
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23 * and is the shell persistent? small? etc.
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24 * also, sudo! (or other access related thing)
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25 * resolve: xmessage v gmessage v xosd_cat etc
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26 * classes: shell, root, message
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27 - an easier way of editing o_O
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28 * add an item to a menu
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29 * submenu
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30 - utility to find missing commands
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31 - utility to add command + (e.g. ubuntu) install
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32 - python package for all of this
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33 * ...which also sets up the whole html2flux thing
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34 - ....and the 50 billion dollar problem is:
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35 How to integrate $(this) and http://k0s.org/portfolio/ubuntu-packages.txt
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36 * these should have classifiers and ultimately work in to toolbox
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37 - can a workflow be mapped to a (X; and, tbf, hierarchal) menu?!?
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38 * YOU'RE SEEING IT, RIGHT?
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39 - that said, a hierachal menu...ain't the best; maybe something like
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40 dasher....
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41 - to that effect, amonst others, menu items of the same set
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42 should be added multiple places. that is to say, the menu item
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43 indicated as `[foo][bar]fleem` could also live under
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44 `[bar][foo]fleem`
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45 """
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46
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47 import argparse
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48 import os
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49 import sys
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50 from lxml import etree
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51 from lsex import lsex # local import
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52
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53 try:
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54 # python2
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55 string = (str, unicode)
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56 except NameError:
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57 # python3
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58 string = (str,)
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59
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60 # available executables
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61 executables = set([os.path.basename(i) for i in lsex() ])
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62
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63 # TODO: next generation
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64 # class HtmlMenu
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65 # def _init__(self, html):
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66 # if isinstance (html, string):
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67 # html =
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68 # for item in html
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69
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70 # class Command
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71 # classname = ''
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72
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73 # class Sudo(Command)
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74 # classname = 'sudo'
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75 # programs = (('gksudo',),)
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76
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77 def readmenu(dl, output, top=True):
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78 """read menu from an <dl> tag"""
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79 # TODO: probably don't really need lxml
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80
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81 menu_items = []
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82 name = None # menu name
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83 firstchild = True
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84 label = None
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85 for child in dl.iterchildren():
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86
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87 if not top and child.tag == 'a' and firstchild:
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88 # TODO: better way of labeling this!
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89 name = child.text.strip()
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90
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91 if child.tag == 'dt':
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92 # item label
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93 label = ' '.join([i.strip() for i in child.itertext() if i.strip()])
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94 if child.tag == 'dd':
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95 # command
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96 command = ' '.join([i.strip() for i in child.itertext() if i.strip()])
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97 # TODO: classes
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98 executable = command.split()[0]
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99 if executable in executables or os.path.isabs(executable):
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100 menu_items.append((label, command))
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101
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102 # submenu
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103 if child.tag == 'dl':
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104 menu_items.append(readmenu(child, output, top=False))
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105
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106 return (name, menu_items)
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107
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108
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109 def printflux(name, menu, output, top=True):
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110 """
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111 print menu in fluxbox notation
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112
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113 - output: file-like object for writing
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114 """
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115
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116 if not menu:
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117 return
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118
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119 # print [submenu] tag for this menu
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120 name = name or ''
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121 if not top:
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122 output.write('[submenu] (%s)\n' % name)
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123
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124 # print menu items
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125 for name, item in menu:
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126 if isinstance(item, string):
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127 # command
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128 output.write('[exec] (%s) {%s}\n' % (name, item))
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129 else:
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130 # submenu
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131 printflux(name, item, output, top=False)
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132
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133 # print end of this submenu
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134 if not top:
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135 output.write('[end]\n')
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136
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137
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138 def printmenu(dl, output):
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139 name, menu = readmenu(dl, output)
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140 if isinstance(output, string):
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141 with open(output, 'w') as f:
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142 printflux(name, menu, f)
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143 else:
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144 # file-like object
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145 printflux(name, menu, output)
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146
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147 def main(args=sys.argv[1:]):
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148 """command line interface"""
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149
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150 # parse command line
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151 parser = argparse.ArgumentParser(description=__doc__)
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152 parser.add_argument('htmlfile', metavar='programs.html', nargs='?',
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153 type=argparse.FileType('r'), default=sys.stdin,
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154 help='input file, or read from stdin if ommitted')
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155 parser.add_argument('--collapse', dest='collapse',
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156 action='store_true', default=False,
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157 help="collapse menus with a single item to that item")
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158 parser.add_argument('-o', '--output', dest='output',
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159 help="output file [Default: <stdout>]")
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160 options = parser.parse_args(args)
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161
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162 # read input
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163 html = options.htmlfile.read()
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164
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165 # get first element
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166 dom = etree.fromstring(html)
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167 dl = dom.find('.//dl')
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168
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169 # print to stdout
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170 printmenu(dl, options.output or sys.stdout)
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171
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172 if __name__ == '__main__':
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173 main()