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#!/usr/bin/env python

import inspect

from pathlib import Path

from IPython.terminal.ipapp import TerminalIPythonApp

from traitlets import Undefined

from collections import defaultdict

here = (Path(__file__)).parent

options = here / "source" / "config" / "options"

generated = options / "config-generated.txt"

import textwrap

indent = lambda text,n: textwrap.indent(text,n*' ')

def interesting_default_value(dv):

if (dv is None) or (dv is Undefined):

return False

if isinstance(dv, (str, list, tuple, dict, set)):

return bool(dv)

return True

def format_aliases(aliases):

fmted = []

for a in aliases:

dashes = '-' if len(a) == 1 else '--'

fmted.append('``%s%s``' % (dashes, a))

return ', '.join(fmted)

def class_config_rst_doc(cls, trait_aliases):

"""Generate rST documentation for this class' config options.

Excludes traits defined on parent classes.

"""

lines = []

classname = cls.__name__

for k, trait in sorted(cls.class_traits(config=True).items()):

ttype = trait.__class__.__name__

fullname = classname + '.' + trait.name

lines += ['.. configtrait:: ' + fullname,

]

help = trait.help.rstrip() or 'No description'

lines.append(indent(inspect.cleandoc(help), 4) + '\n')

# Choices or type

if 'Enum' in ttype:

# include Enum choices

lines.append(indent(

':options: ' + ', '.join('``%r``' % x for x in trait.values), 4))

else:

lines.append(indent(':trait type: ' + ttype, 4))

# Default value

# Ignore boring default values like None, [] or ''

if interesting_default_value(trait.default_value):

try:

dvr = trait.default_value_repr()

except Exception:

dvr = None # ignore defaults we can't construct

if dvr is not None:

if len(dvr) > 64:

dvr = dvr[:61] + '...'

# Double up backslashes, so they get to the rendered docs

dvr = dvr.replace('\\n', '\\\\n')

lines.append(indent(':default: ``%s``' % dvr, 4))

# Command line aliases

if trait_aliases[fullname]:

fmt_aliases = format_aliases(trait_aliases[fullname])

lines.append(indent(':CLI option: ' + fmt_aliases, 4))

# Blank line

lines.append('')

return '\n'.join(lines)

def reverse_aliases(app):

"""Produce a mapping of trait names to lists of command line aliases.

"""

res = defaultdict(list)

for alias, trait in app.aliases.items():

res[trait].append(alias)

# Flags also often act as aliases for a boolean trait.

# Treat flags which set one trait to True as aliases.

for flag, (cfg, _) in app.flags.items():

if len(cfg) == 1:

classname = list(cfg)[0]

cls_cfg = cfg[classname]

if len(cls_cfg) == 1:

traitname = list(cls_cfg)[0]

if cls_cfg[traitname] is True:

res[classname+'.'+traitname].append(flag)

return res

def write_doc(name, title, app, preamble=None):

trait_aliases = reverse_aliases(app)

filename = options / (name + ".rst")

with open(filename, "w", encoding="utf-8") as f:

f.write("\n")

if preamble is not None:

f.write(preamble + '\n\n')

for c in app._classes_inc_parents():

f.write(class_config_rst_doc(c, trait_aliases))

f.write('\n')

def main():

# Touch this file for the make target

Path(generated).write_text("", encoding="utf-8")

write_doc('terminal', 'Terminal IPython options', TerminalIPythonApp())

if __name__ == '__main__':

main()

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