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annotate python/html2flux.py @ 824:16200adbd4f0

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work around exit code for no changes
author Jeff Hammel <k0scist@gmail.com>
date Tue, 07 Feb 2017 10:28:00 -0800
parents fbfc02ea7d8e
children c26ec5ea9b9a
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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 string = (str, unicode)
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54
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55 # available executables
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56 executables = set([os.path.basename(i) for i in lsex() ])
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57
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58 # TODO: next generation
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59 # class HtmlMenu
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60 # def _init__(self, html):
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61 # if isinstance (html, string):
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62 # html =
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63 # for item in html
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64
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65 # class Command
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66 # classname = ''
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67
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68 # class Sudo(Command)
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69 # classname = 'sudo'
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70 # programs = (('gksudo',),)
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71
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72 def readmenu(dl, output, top=True):
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73 """read menu from an <dl> tag"""
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74 # TODO: probably don't really need lxml
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75
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76 menu_items = []
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77 name = None # menu name
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78 firstchild = True
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79 label = None
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80 for child in dl.iterchildren():
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81
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82 if not top and child.tag == 'a' and firstchild:
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83 # TODO: better way of labeling this!
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84 name = child.text.strip()
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85
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86 if child.tag == 'dt':
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87 # item label
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88 label = ' '.join([i.strip() for i in child.itertext() if i.strip()])
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89 if child.tag == 'dd':
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90 # command
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91 command = ' '.join([i.strip() for i in child.itertext() if i.strip()])
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92 # TODO: classes
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93 executable = command.split()[0]
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94 if executable in executables or os.path.isabs(executable):
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95 menu_items.append((label, command))
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96
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97 # submenu
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98 if child.tag == 'dl':
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99 menu_items.append(readmenu(child, output, top=False))
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100
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101 return (name, menu_items)
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102
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103
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104 def printflux(name, menu, output, top=True):
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105 """
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106 print menu in fluxbox notation
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107
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108 - output: file-like object for writing
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109 """
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110
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111 if not menu:
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112 return
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113
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114 # print [submenu] tag for this menu
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115 name = name or ''
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116 if not top:
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117 print >> output, '[submenu] (%s)' % name
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118
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119 # print menu items
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120 for name, item in menu:
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121 if isinstance(item, basestring):
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122 # command
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123 print >> output, '[exec] (%s) {%s}' % (name, item)
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124 else:
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125 # submenu
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126 printflux(name, item, output, top=False)
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127
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128 # print end of this submenu
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129 if not top:
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130 print >> output, '[end]'
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131
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132 def printmenu(dl, output):
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133 name, menu = readmenu(dl, output)
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134 if isinstance(output, string):
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135 with open(output, 'w') as f:
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136 printflux(name, menu, f)
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137 else:
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138 # file-like object
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139 printflux(name, menu, output)
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140
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141 def main(args=sys.argv[1:]):
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142 """command line interface"""
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143
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144 # parse command line
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145 parser = argparse.ArgumentParser(description=__doc__)
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146 parser.add_argument('htmlfile', metavar='programs.html', nargs='?',
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147 type=argparse.FileType('r'), default=sys.stdin,
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148 help='input file, or read from stdin if ommitted')
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149 parser.add_argument('--collapse', dest='collapse',
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150 action='store_true', default=False,
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151 help="collapse menus with a single item to that item")
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152 parser.add_argument('-o', '--output', dest='output',
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153 help="output file [Default: <stdout>]")
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154 options = parser.parse_args(args)
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155
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156 # read input
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157 html = options.htmlfile.read()
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158
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159 # get first element
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160 dom = etree.fromstring(html)
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161 dl = dom.find('.//dl')
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162
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163 # print to stdout
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164 printmenu(dl, options.output or sys.stdout)
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165
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166 if __name__ == '__main__':
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167 main()