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#!/usr/bin/env python3
#
# Copyright (C) 2018 Codethink Limited
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
#
# Authors:
# Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
import re
import copy
import click
# Profile()
#
# A class for formatting text with ansi color codes
#
# Kwargs:
# The same keyword arguments which can be used with click.style()
#
class Profile():
def __init__(self, **kwargs):
self._kwargs = dict(kwargs)
# fmt()
#
# Format some text with ansi color codes
#
# Args:
# text (str): The text to format
#
# Kwargs:
# Keyword arguments to apply on top of the base click.style()
# arguments
#
def fmt(self, text, **kwargs):
kwargs = dict(kwargs)
fmtargs = copy.copy(self._kwargs)
fmtargs.update(kwargs)
return click.style(text, **fmtargs)
# fmt_subst()
#
# Substitute a variable of the %{varname} form, formatting
# only the substituted text with the given click.style() configurations
#
# Args:
# text (str): The text to format, with possible variables
# varname (str): The variable name to substitute
# value (str): The value to substitute the variable with
#
# Kwargs:
# Keyword arguments to apply on top of the base click.style()
# arguments
#
def fmt_subst(self, text, varname, value, **kwargs):
def subst_callback(match):
# Extract and format the "{(varname)...}" portion of the match
inner_token = match.group(1)
formatted = inner_token.format(**{varname: value})
# Colorize after the pythonic format formatting, which may have padding
return self.fmt(formatted, **kwargs)
# Lazy regex, after our word, match anything that does not have '%'
return re.sub(r"%(\{(" + varname + r")[^%]*\})", subst_callback, text)
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