nixpkgs/nixos/lib/make-options-doc/sortXML.py

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import xml.etree.ElementTree as ET
import sys
tree = ET.parse(sys.argv[1])
# the xml tree is of the form
# <expr><list> {all options, each an attrs} </list></expr>
options = list(tree.getroot().find('list'))
def sortKey(opt):
def order(s):
if s.startswith("enable"):
return 0
if s.startswith("package"):
return 1
return 2
return [
(order(p.attrib['value']), p.attrib['value'])
for p in opt.findall('attr[@name="loc"]/list/string')
]
options.sort(key=sortKey)
doc = ET.Element("expr")
newOptions = ET.SubElement(doc, "list")
newOptions.extend(options)
ET.ElementTree(doc).write(sys.argv[2], encoding='utf-8')