mmgen-wallet/mmgen/devtools.py

#!/usr/bin/env python3
#
# mmgen = Multi-Mode GENerator, a command-line cryptocurrency wallet
# Copyright (C)2013-2023 The MMGen Project <mmgen@tuta.io>
# Licensed under the GNU General Public License, Version 3:
#   https://www.gnu.org/licenses
# Public project repositories:
#   https://github.com/mmgen/mmgen
#   https://gitlab.com/mmgen/mmgen

"""
devtools: Developer tools for the MMGen suite
"""

import sys

def pfmt(*args):
	import pprint
	return pprint.PrettyPrinter(indent=4).pformat(
		args if len(args) > 1 else '' if not args else args[0] )

def pmsg(*args):
	sys.stderr.write(pfmt(*args) + '\n')

def pmsg_r(*args):
	sys.stderr.write(pfmt(*args))

def pdie(*args,exit_val=1):
	pmsg(*args)
	sys.exit(exit_val)

def pexit(*args):
	pdie(*args,exit_val=0)

def Pmsg(*args):
	sys.stdout.write(pfmt(*args) + '\n')

def Pdie(*args,exit_val=1):
	Pmsg(*args)
	sys.exit(exit_val)

def Pexit(*args):
	Pdie(*args,exit_val=0)

def print_stack_trace(message=None,fh_list=[],nl='\n',sep='\n  ',trim=4):
	import os
	if not fh_list:
		fh_list.append(open(f'devtools.trace.{os.getpid()}','w'))
		nl = ''
	res = get_stack_trace(message,nl,sep,trim)
	sys.stderr.write(res)
	fh_list[0].write(res)

def get_stack_trace(message=None,nl='\n',sep='\n  ',trim=3):

	import os,re,traceback

	tb = [t for t in traceback.extract_stack() if t.filename[:1] != '<']
	fs = '{}:{}: in {}:\n    {}'
	out = [
		fs.format(
			re.sub(r'^\./','',os.path.relpath(t.filename)),
			t.lineno,
			(t.name+'()' if t.name[-1] != '>' else t.name),
			t.line or '(none)')
		for t in (tb[:-trim] if trim else tb) ]

	return f'{nl}STACK TRACE {message or "[unnamed]"}:{sep}{sep.join(out)}\n'

def print_diff(*args,**kwargs):
	sys.stderr.write(get_diff(*args,**kwargs))

def get_diff(a,b,a_fn='',b_fn='',from_json=True):

	if from_json:
		import json
		a = json.dumps(json.loads(a),indent=4)
		b = json.dumps(json.loads(b),indent=4)

	from difflib import unified_diff
	# chunk headers have trailing newlines, hence the rstrip()
	return '  DIFF:\n    {}\n'.format(
		'\n    '.join(a.rstrip('\n') for a in unified_diff(
			a.split('\n'),
			b.split('\n'),
			a_fn,
			b_fn )))

def print_ndiff(*args,**kwargs):
	sys.stderr.write(get_ndiff(*args,**kwargs))

def get_ndiff(a,b):
	from difflib import ndiff
	return list(ndiff(
		a.split('\n'),
		b.split('\n') ))

class MMGenObjectMethods: # mixin class for MMGenObject

	# Pretty-print an MMGenObject instance, recursing into sub-objects - WIP
	def pmsg(self):
		sys.stdout.write('\n'+self.pfmt())

	def pdie(self,exit_val=1):
		self.pmsg()
		sys.exit(exit_val)

	def pexit(self):
		self.pdie(exit_val=0)

	def pfmt(self,lvl=0,id_list=[]):
		from decimal import Decimal
		scalars = (str,int,float,Decimal)
		def do_list(out,e,lvl=0,is_dict=False):
			out.append('\n')
			for i in e:
				el = i if not is_dict else e[i]
				if is_dict:
#					out.append('{s}{:<{l}}'.format(i,s=' '*(4*lvl+8),l=10,l2=8*(lvl+1)+8))
					out.append('{s1}{i}{s2}'.format(
						i  = i,
						s1 = ' ' * (4*lvl+8),
						s2 = ' ' * 10 ))
				if hasattr(el,'pfmt'):
					out.append('{:>{l}}{}'.format(
						'',
						el.pfmt( lvl=lvl+1, id_list=id_list+[id(self)] ),
						l = (lvl+1)*8 ))
				elif isinstance(el,scalars):
					if isList(e):
						out.append( '{:>{l}}{!r:16}\n'.format( '', el, l=lvl*8 ))
					else:
						out.append(f' {el!r}')
				elif isList(el) or isDict(el):
					indent = 1 if is_dict else lvl*8+4
					out.append('{:>{l}}{:16}'.format( '', f'<{type(el).__name__}>', l=indent ))
					if isList(el) and isinstance(el[0],scalars):
						out.append('\n')
					do_list(out,el,lvl=lvl+1,is_dict=isDict(el))
				else:
					out.append('{:>{l}}{:16} {!r}\n'.format( '', f'<{type(el).__name__}>', el, l=(lvl*8)+8 ))
				out.append('\n')

			if not e:
				out.append(f'{e!r}\n')

		def isDict(obj):
			return isinstance(obj,dict)
		def isList(obj):
			return isinstance(obj,list)
		def isScalar(obj):
			return isinstance(obj,scalars)

		out = [f'<{type(self).__name__}>{" "+repr(self) if isScalar(self) else ""}\n']

		if id(self) in id_list:
			return out[-1].rstrip() + ' [RECURSION]\n'
		if isList(self) or isDict(self):
			do_list(out,self,lvl=lvl,is_dict=isDict(self))

		for k in self.__dict__:
			e = getattr(self,k)
			if isList(e) or isDict(e):
				out.append('{:>{l}}{:<10} {:16}'.format( '', k, f'<{type(e).__name__}>', l=(lvl*8)+4 ))
				do_list(out,e,lvl=lvl,is_dict=isDict(e))
			elif hasattr(e,'pfmt') and callable(e.pfmt) and type(e) != type:
				out.append('{:>{l}}{:10} {}'.format(
					'',
					k,
					e.pfmt( lvl=lvl+1, id_list=id_list+[id(self)] ),
					l = (lvl*8)+4 ))
			else:
				out.append('{:>{l}}{:<10} {:16} {}\n'.format(
					'',
					k,
					f'<{type(e).__name__}>',
					repr(e),
					l=(lvl*8)+4 ))

		import re
		return re.sub('\n+','\n',''.join(out))