mmgen-wallet/test/test.py

#!/usr/bin/env python3
#
# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
# Copyright (C)2013-2022 The MMGen Project <mmgen@tuta.io>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
test/test.py: Test suite for the MMGen wallet system
"""

def check_segwit_opts():
	for k,m in (('segwit','S'),('segwit_random','S'),('bech32','B')):
		if getattr(opt,k) and m not in proto.mmtypes:
			die(1,f'--{k.replace("_","-")} option incompatible with {proto.cls_name}')

def create_shm_dir(data_dir,trash_dir):
	# Laggy flash media can cause pexpect to fail, so create a temporary directory
	# under '/dev/shm' and put datadir and tmpdirs here.
	import shutil
	from subprocess import run
	if g.platform == 'win':
		for tdir in (data_dir,trash_dir):
			try: os.listdir(tdir)
			except: pass
			else:
				try: shutil.rmtree(tdir)
				except: # we couldn't remove data dir - perhaps regtest daemon is running
					try:
						run(['python3',os.path.join('cmds','mmgen-regtest'),'stop'],check=True)
					except:
						die(4,f'Unable to remove {tdir!r}!')
					else:
						time.sleep(2)
						shutil.rmtree(tdir)
			os.mkdir(tdir,0o755)
		shm_dir = 'test'
	else:
		tdir,pfx = '/dev/shm','mmgen-test-'
		try:
			run(f'rm -rf {tdir}/{pfx}*',shell=True,check=True)
		except Exception as e:
			die(2,f'Unable to delete directory tree {tdir}/{pfx}* ({e.args[0]})')
		try:
			import tempfile
			shm_dir = str(tempfile.mkdtemp('',pfx,tdir))
		except Exception as e:
			die(2,f'Unable to create temporary directory in {tdir} ({e.args[0]})')

		dest = os.path.join(shm_dir,os.path.basename(trash_dir))
		os.mkdir(dest,0o755)

		run(f'rm -rf {trash_dir}',shell=True,check=True)
		os.symlink(dest,trash_dir)

		dest = os.path.join(shm_dir,os.path.basename(data_dir))
		shutil.move(data_dir,dest) # data_dir was created by opts.init()
		os.symlink(dest,data_dir)

	return shm_dir

import sys,os,time

from include.tests_header import repo_root
from test.overlay import get_overlay_tree_dir,overlay_setup

overlay_tree_dir = get_overlay_tree_dir(repo_root)
sys.path.insert(0,overlay_tree_dir)

if sys.argv[-1] == 'clean':
	from shutil import rmtree
	rmtree(overlay_tree_dir,ignore_errors=True)
else:
	# overlay must be set up before importing mmgen mods!
	overlay_setup(repo_root)

from mmgen.common import *

try:
	os.unlink(os.path.join(repo_root,'test.py.err'))
except:
	pass

g.quiet = False # if 'quiet' was set in config file, disable here
os.environ['MMGEN_QUIET'] = '0' # for this script and spawned scripts

opts_data = {
	'sets': [('list_current_cmd_groups',True,'list_cmd_groups',True)],
	'text': {
		'desc': 'Test suite for the MMGen suite',
		'usage':'[options] [command [..command]] | [command_group[.command_subgroup][:command]]',
		'options': """
-h, --help           Print this help message
--, --longhelp       Print help message for long options (common options)
-a, --no-altcoin     Skip altcoin tests (WIP)
-A, --no-daemon-autostart Don't start and stop daemons automatically
-B, --bech32         Generate and use Bech32 addresses
-b, --buf-keypress   Use buffered keypresses as with real human input
                     (often required on slow systems, or under emulation)
-c, --print-cmdline  Print the command line of each spawned command
-C, --coverage       Produce code coverage info using trace module
-x, --debug-pexpect  Produce debugging output for pexpect calls
-D, --no-daemon-stop Don't stop auto-started daemons after running tests
-E, --direct-exec    Bypass pexpect and execute a command directly (for
                     debugging only)
-e, --exact-output   Show the exact output of the MMGen script(s) being run
-G, --exclude-groups=G Exclude the specified command groups (comma-separated)
-l, --list-cmds      List the test script’s available commands
-L, --list-cmd-groups List the test script’s command groups and subgroups
-g, --list-current-cmd-groups List command groups for current configuration
-n, --names          Display command names instead of descriptions
-N, --no-timings     Suppress display of timing information
-o, --log            Log commands to file {lf!r}
-O, --pexpect-spawn  Use pexpect.spawn instead of popen_spawn (much slower,
                     kut does real terminal emulation)
-p, --pause          Pause between tests, resuming on keypress
-P, --profile        Record the execution time of each script
-q, --quiet          Produce minimal output.  Suppress dependency info
-r, --resume=c       Resume at command 'c' after interrupted run
-R, --resume-after=c Same, but resume at command following 'c'
-t, --step           After resuming, execute one command and stop
-s, --system         Test scripts and modules installed on system rather
                     than those in the repo root
-S, --skip-deps      Skip dependency checking for command
-u, --usr-random     Get random data interactively from user
-T, --pexpect-timeout=T Set the timeout for pexpect
-v, --verbose        Produce more verbose output
-W, --no-dw-delete   Don't remove default wallet from data dir after dw tests
                     are done
-X, --exit-after=C   Exit after command 'C'
-y, --segwit         Generate and use Segwit addresses
-Y, --segwit-random  Generate and use a random mix of Segwit and Legacy addrs
""",
		'notes': """

If no command is given, the whole test suite is run for the currently
specified coin (default BTC).

For traceback output and error file support, set the EXEC_WRAPPER_TRACEBACK
environment var
"""
	},
	'code': {
		'options': lambda proto,help_notes,s: s.format(
				lf = help_notes('test_py_log_file')
			)
	}
}

# we need some opt values before running opts.init, so parse without initializing:
po = opts.init(opts_data,parse_only=True)

from test.include.common import *
from test.test_py_d.common import *

data_dir = get_data_dir() # include/common.py

# step 1: delete data_dir symlink in ./test;
opt.resuming = any(k in po.user_opts for k in ('resume','resume_after'))
opt.skipping_deps = opt.resuming or 'skip_deps' in po.user_opts

if not opt.skipping_deps:
	try: os.unlink(data_dir)
	except: pass

opts.UserOpts._reset_ok += (
	'no_daemon_autostart',
	'names',
	'no_timings',
	'exit_after',
	'resuming',
	'skipping_deps' )

# step 2: opts.init will create new data_dir in ./test (if not opt.skipping_deps)
parsed_opts = opts.init(opts_data,return_parsed=True)
usr_args = parsed_opts.cmd_args

if opt.daemon_id and opt.daemon_id in g.blacklist_daemons.split():
	die(0,f'test.py: daemon {opt.daemon_id!r} blacklisted, exiting')

network_id = g.coin.lower() + ('_tn' if opt.testnet else '')

from mmgen.protocol import init_proto_from_opts
proto = init_proto_from_opts()

# step 3: move data_dir to /dev/shm and symlink it back to ./test:
trash_dir = os.path.join('test','trash')

if not opt.skipping_deps:
	shm_dir = create_shm_dir(data_dir,trash_dir)

check_segwit_opts()

testing_segwit = opt.segwit or opt.segwit_random or opt.bech32

if g.test_suite_deterministic:
	opt.no_timings = True
	init_color(num_colors=0)
	os.environ['MMGEN_DISABLE_COLOR'] = '1'

if opt.profile:
	opt.names = True

if opt.exact_output:
	def msg(s): pass
	qmsg = qmsg_r = vmsg = vmsg_r = msg_r = msg

if opt.skipping_deps:
	opt.no_daemon_autostart = True

from test.test_py_d.cfg import cfgs,fixup_cfgs

for k in cfgs:
	cfgs[k]['tmpdir'] = os.path.join('test','tmp',str(k))

fixup_cfgs()

utils = {
#	'check_deps': 'check dependencies for specified command (WIP)', # TODO
	'clean':      'clean specified tmp dir(s) (specify by integer, no arg = all dirs)',
}

def list_cmds():

	def gen_output():

		gm = CmdGroupMgr()
		cw,d = 0,[]

		yield green('AVAILABLE COMMANDS:')

		for gname in gm.cmd_groups:
			ts = gm.gm_init_group(None,gname,None,None)
			desc = ts.__doc__.strip() if ts.__doc__ else type(ts).__name__
			d.append( (gname,desc,gm.cmd_list,gm.dpy_data) )
			cw = max(max(len(k) for k in gm.dpy_data),cw)

		for gname,gdesc,clist,dpdata in d:
			yield '\n'+green(f'{gname!r} - {gdesc}:')
			for cmd in clist:
				data = dpdata[cmd]
				yield '    {:{w}} - {}'.format(
					cmd,
					(data if type(data) == str else data[1]),
					w = cw )

		w = max(map(len,utils))

		yield '\n'+green('AVAILABLE UTILITIES:')

		for cmd in sorted(utils):
			yield '  {:{w}} - {}'.format( cmd, utils[cmd], w=w )

	from mmgen.ui import do_pager
	do_pager('\n'.join(gen_output()))

	sys.exit(0)

def do_between():
	if opt.pause:
		confirm_continue()
	elif (opt.verbose or opt.exact_output) and not opt.skipping_deps:
		sys.stderr.write('\n')

def list_tmpdirs():
	return {k:cfgs[k]['tmpdir'] for k in cfgs}

def clean(usr_dirs=None,clean_overlay=True):
	if opt.skipping_deps:
		return
	all_dirs = list_tmpdirs()
	dirnums = map(int,(usr_dirs if usr_dirs is not None else all_dirs))
	dirlist = list(map(str,sorted(dirnums)))
	for d in dirlist:
		if d in all_dirs:
			cleandir(all_dirs[d])
		else:
			die(1,f'{d}: invalid directory number')
	if dirlist:
		iqmsg(green('Cleaned tmp director{} {}'.format(
			suf(dirlist,'ies'),
			' '.join(dirlist))
		))
	cleandir(data_dir)
	cleandir(trash_dir)
	iqmsg(green(f'Cleaned directories {data_dir!r} {trash_dir!r}'))

	if clean_overlay:
		cleandir(overlay_tree_dir)
		iqmsg(green(f'Cleaned directory {os.path.relpath(overlay_tree_dir)!r}'))

def create_tmp_dirs(shm_dir):
	if g.platform == 'win':
		for cfg in sorted(cfgs):
			mk_tmpdir(cfgs[cfg]['tmpdir'])
	else:
		os.makedirs( 'test/tmp', mode=0o755, exist_ok=True )
		for cfg in sorted(cfgs):
			src = os.path.join(shm_dir,cfgs[cfg]['tmpdir'].split('/')[-1])
			mk_tmpdir(src)
			try:
				os.unlink(cfgs[cfg]['tmpdir'])
			except OSError as e:
				if e.errno != 2:
					raise
			finally:
				os.symlink(src,cfgs[cfg]['tmpdir'])

def set_environ_for_spawned_scripts():

	from mmgen.term import get_terminal_size
	os.environ['MMGEN_COLUMNS'] = str(get_terminal_size().width)

	if os.getenv('MMGEN_DEBUG_ALL'):
		for name in g.env_opts:
			if name[:11] == 'MMGEN_DEBUG':
				os.environ[name] = '1'

	if not opt.system:
		os.environ['PYTHONPATH'] = repo_root

	if not opt.buf_keypress:
		os.environ['MMGEN_DISABLE_HOLD_PROTECT'] = '1'

	os.environ['MMGEN_NO_LICENSE'] = '1'
	os.environ['MMGEN_MIN_URANDCHARS'] = '3'
	os.environ['MMGEN_BOGUS_SEND'] = '1'
	os.environ['MMGEN_TEST_SUITE_PEXPECT'] = '1'

def set_restore_term_at_exit():
	import termios,atexit
	fd = sys.stdin.fileno()
	old = termios.tcgetattr(fd)
	def at_exit():
		termios.tcsetattr(fd, termios.TCSADRAIN, old)
	atexit.register(at_exit)

class CmdGroupMgr(object):

	from test.test_py_d.cfg import cmd_groups_dfl,cmd_groups_extra

	cmd_groups = cmd_groups_dfl.copy()
	cmd_groups.update(cmd_groups_extra)

	@staticmethod
	def create_cmd_group(cls,sg_name=None):

		cmd_group_in = dict(cls.cmd_group_in)

		if sg_name and 'subgroup.' + sg_name not in cmd_group_in:
			die(1,f'{sg_name!r}: no such subgroup in test group {cls.__name__}')

		def add_entries(key,add_deps=True):
			if add_deps:
				for dep in cmd_group_in['subgroup.'+key]:
					for e in add_entries(dep):
						yield e

			assert isinstance(cls.cmd_subgroups[key][0],str), f'header for subgroup {key!r} missing!'

			for e in cls.cmd_subgroups[key][1:]:
				yield e

		def gen():
			for name,data in cls.cmd_group_in:
				if name.startswith('subgroup.'):
					from mmgen.util2 import removeprefix
					sg_key = removeprefix(name,'subgroup.')
#					sg_key = name.removeprefix('subgroup.') # Python 3.9
					if sg_name in (None,sg_key):
						for e in add_entries(
								sg_key,
								add_deps = sg_name and not opt.skipping_deps ):
							yield e
				elif not opt.skipping_deps:
					yield (name,data)

		return tuple(gen())

	def load_mod(self,gname,modname=None):
		clsname,kwargs = self.cmd_groups[gname]
		if modname == None and 'modname' in kwargs:
			modname = kwargs['modname']
		import importlib
		modpath = f'test.test_py_d.ts_{modname or gname}'
		return getattr(importlib.import_module(modpath),clsname)

	def create_group(self,gname,sg_name,full_data=False,modname=None,is3seed=False,add_dpy=False):
		"""
		Initializes the list 'cmd_list' and dict 'dpy_data' from module's cmd_group data.
		Alternatively, if called with 'add_dpy=True', updates 'dpy_data' from module data
		without touching 'cmd_list'
		"""

		cls = self.load_mod(gname,modname)
		cdata = []

		def get_shared_deps(cmdname,tmpdir_idx):
			"""
			shared_deps are "implied" dependencies for all cmds in cmd_group that don't appear in
			the cmd_group data or cmds' argument lists.  Supported only for 3seed tests at present.
			"""
			if not hasattr(cls,'shared_deps'):
				return []

			return [k for k,v in cfgs[str(tmpdir_idx)]['dep_generators'].items()
						if k in cls.shared_deps and v != cmdname]

		if not hasattr(cls,'cmd_group'):
			cls.cmd_group = self.create_cmd_group(cls,sg_name)

		for a,b in cls.cmd_group:
			if is3seed:
				for n,(i,j) in enumerate(zip(cls.tmpdir_nums,(128,192,256))):
					k = f'{a}_{n+1}'
					if hasattr(cls,'skip_cmds') and k in cls.skip_cmds:
						continue
					sdeps = get_shared_deps(k,i)
					if type(b) == str:
						cdata.append( (k, (i,f'{b} ({j}-bit)',[[[]+sdeps,i]])) )
					else:
						cdata.append( (k, (i,f'{b[1]} ({j}-bit)',[[b[0]+sdeps,i]])) )
			else:
				cdata.append( (a, b if full_data else (cls.tmpdir_nums[0],b,[[[],cls.tmpdir_nums[0]]])) )

		if add_dpy:
			self.dpy_data.update(dict(cdata))
		else:
			self.cmd_list = tuple(e[0] for e in cdata)
			self.dpy_data = dict(cdata)

		return cls

	def gm_init_group(self,trunner,gname,sg_name,spawn_prog):
		kwargs = self.cmd_groups[gname][1]
		cls = self.create_group(gname,sg_name,**kwargs)
		cls.group_name = gname
		return cls(trunner,cfgs,spawn_prog)

	def get_cls_by_gname(self,gname):
		return self.load_mod( gname, self.cmd_groups[gname][1].get('modname') )

	def list_cmd_groups(self):
		ginfo = []
		for gname in self.cmd_groups:
			ginfo.append(( gname, self.get_cls_by_gname(gname) ))

		if opt.list_current_cmd_groups:
			exclude = (opt.exclude_groups or '').split(',')
			ginfo = [g for g in ginfo
						if network_id in g[1].networks
							and not g[0] in exclude
							and g[0] in tuple(self.cmd_groups_dfl) + tuple(usr_args) ]
			desc = 'CONFIGURED'
		else:
			desc = 'AVAILABLE'

		def gen_output():
			yield green(f'{desc} COMMAND GROUPS AND SUBGROUPS:')
			yield ''
			for name,cls in ginfo:
				yield '  {} - {}'.format(
					yellow(name.ljust(13)),
					(cls.__doc__.strip() if cls.__doc__ else cls.__name__) )
				if hasattr(cls,'cmd_subgroups'):
					max_w = max(len(k) for k in cls.cmd_subgroups)
					for k,v in cls.cmd_subgroups.items():
						yield '    + {} · {}'.format( cyan(k.ljust(max_w+1)), v[0] )

		from mmgen.ui import do_pager
		do_pager('\n'.join(gen_output()))

		Msg( '\n' + ' '.join(e[0] for e in ginfo) )
		sys.exit(0)

	def find_cmd_in_groups(self,cmd,group=None):
		"""
		Search for a test command in specified group or all configured command groups
		and return it as a string.  Loads modules but alters no global variables.
		"""
		if group:
			if not group in [e[0] for e in self.cmd_groups]:
				die(1,f'{group!r}: unrecognized group')
			groups = [self.cmd_groups[group]]
		else:
			groups = self.cmd_groups

		for gname in groups:
			cls = self.get_cls_by_gname(gname)

			if not hasattr(cls,'cmd_group'):
				cls.cmd_group = self.create_cmd_group(cls)

			if cmd in cls.cmd_group:             # first search the class
				return gname

			if cmd in dir(cls(None,None,None)):  # then a throwaway instance
				return gname # cmd might exist in more than one group - we'll go with the first

		return None

class TestSuiteRunner(object):
	'test suite runner'

	def __del__(self):
		if opt.log:
			self.log_fd.close()

	def __init__(self,data_dir,trash_dir):

		self.data_dir = data_dir
		self.trash_dir = trash_dir
		self.cmd_total = 0
		self.rebuild_list = {}
		self.gm = CmdGroupMgr()
		self.repo_root = repo_root
		self.skipped_warnings = []
		self.resume_cmd = None

		if opt.log:
			self.log_fd = open(log_file,'a')
			self.log_fd.write(f'\nLog started: {make_timestr()} UTC\n')
			omsg(f'INFO → Logging to file {log_file!r}')
		else:
			self.log_fd = None

		if opt.coverage:
			coverdir,accfile = init_coverage()
			omsg(f'INFO → Writing coverage files to {coverdir!r}')
			self.pre_args = ['python3','-m','trace','--count','--coverdir='+coverdir,'--file='+accfile]
		else:
			self.pre_args = ['python3'] if g.platform == 'win' else []

		if opt.pexpect_spawn:
			omsg(f'INFO → Using pexpect.spawn() for real terminal emulation')

	def spawn_wrapper(self,cmd,
			args         = [],
			extra_desc   = '',
			no_output    = False,
			msg_only     = False,
			no_msg       = False,
			cmd_dir      = 'cmds',
			no_exec_wrapper = False,
			pexpect_spawn = None ):

		desc = self.ts.test_name if opt.names else self.gm.dpy_data[self.ts.test_name][1]
		if extra_desc:
			desc += ' ' + extra_desc

		cmd_path = (
			cmd if opt.system # opt.system is broken for main test group with overlay tree
			else os.path.relpath(os.path.join(repo_root,cmd_dir,cmd)) )

		args = (
			self.pre_args +
			([] if no_exec_wrapper else ['scripts/exec_wrapper.py']) +
			[cmd_path] +
			self.passthru_opts +
			self.ts.extra_spawn_args +
			args )

		for i in args:
			if not isinstance(i,str):
				die(2,'Error: missing input files in cmd line?:\nName: {}\nCmdline: {!r}'.format(
					self.ts.test_name,
					args ))

		qargs = ['{q}{}{q}'.format( a, q = "'" if ' ' in a else '' ) for a in args]
		cmd_disp = ' '.join(qargs).replace('\\','/') # for mingw

		if not no_msg:
			t_pfx = '' if opt.no_timings else f'[{time.time() - self.start_time:08.2f}] '
			if opt.verbose or opt.print_cmdline or opt.exact_output:
				omsg(green(f'{t_pfx}Testing: {desc}'))
				if not msg_only:
					clr1,clr2 = (nocolor,nocolor) if opt.print_cmdline else (green,cyan)
					omsg(
						clr1('Executing: ') +
						clr2(repr(cmd_disp) if g.platform == 'win' else cmd_disp)
					)
			else:
				omsg_r(f'{t_pfx}Testing {desc}: ')

		if msg_only:
			return

		if opt.log:
			self.log_fd.write('[{}][{}:{}] {}\n'.format(
				proto.coin.lower(),
				self.ts.group_name,
				self.ts.test_name,
				cmd_disp))

		pexpect_spawn = pexpect_spawn if pexpect_spawn is not None else bool(opt.pexpect_spawn)

		os.environ['MMGEN_TEST_SUITE_POPEN_SPAWN'] = '' if pexpect_spawn else '1'
		os.environ['MMGEN_FORCE_COLOR'] = '1' if self.ts.color else ''

		env = { 'EXEC_WRAPPER_SPAWN':'1' }
		env.update(os.environ)
		if 'exec_wrapper_init' in globals():
			# test.py itself is running under exec_wrapper, so disable traceback file writing for spawned script
			env.update({ 'EXEC_WRAPPER_TRACEBACK':'' }) # Python 3.9: OR the dicts

		from test.include.pexpect import MMGenPexpect
		return MMGenPexpect( args, no_output=no_output, env=env, pexpect_spawn=pexpect_spawn )

	def end_msg(self):
		t = int(time.time() - self.start_time)
		sys.stderr.write(green(
			f'{self.cmd_total} test{suf(self.cmd_total)} performed' +
			('\n' if opt.no_timings else f'.  Elapsed time: {t//60:02d}:{t%60:02d}\n')
		))

	def init_group(self,gname,sg_name=None,cmd=None,quiet=False,do_clean=True):

		ts_cls = CmdGroupMgr().load_mod(gname)

		for k in ('segwit','segwit_random','bech32'):
			if getattr(opt,k):
				segwit_opt = k
				break
		else:
			segwit_opt = None

		def gen_msg():
			yield ('{g}:{c}' if cmd else 'test group {g!r}').format(g=gname,c=cmd)
			if len(ts_cls.networks) != 1:
				yield f' for {proto.coin} {proto.network}'
			if segwit_opt:
				yield ' (--{})'.format( segwit_opt.replace('_','-') )

		m = ''.join(gen_msg())

		if segwit_opt and not ts_cls.segwit_opts_ok:
			iqmsg('INFO → skipping ' + m)
			return False

		# 'networks = ()' means all networks allowed
		nws = [(e.split('_')[0],'testnet') if '_' in e else (e,'mainnet') for e in ts_cls.networks]
		if nws:
			coin = proto.coin.lower()
			nw = ('mainnet','testnet')[proto.testnet]
			for a,b in nws:
				if a == coin and b == nw:
					break
			else:
				iqmsg('INFO → skipping ' + m)
				return False

		if do_clean:
			clean(ts_cls.tmpdir_nums,clean_overlay=False)

		if not quiet:
			bmsg('Executing ' + m)

		if (not self.daemon_started) and self.gm.get_cls_by_gname(gname).need_daemon:
			start_test_daemons(network_id,remove_datadir=True)
			self.daemon_started = True

		os.environ['MMGEN_BOGUS_UNSPENT_DATA'] = '' # zero this here, so test groups don't have to

		self.ts = self.gm.gm_init_group(self,gname,sg_name,self.spawn_wrapper)
		self.ts_clsname = type(self.ts).__name__

		# only pass through opts that are explicitly set on cmdline (po.user_opts)
		self.passthru_opts = ['--{}{}'.format(
				k.replace('_','-'),
				'=' + getattr(opt,k) if getattr(opt,k) != True else ''
			) for k in self.ts.base_passthru_opts + self.ts.passthru_opts if k in parsed_opts.user_opts]

		if opt.resuming:
			rc = opt.resume or opt.resume_after
			offset = 1 if opt.resume_after else 0
			self.resume_cmd = self.gm.cmd_list[self.gm.cmd_list.index(rc)+offset]
			omsg(f'INFO → Resuming at command {self.resume_cmd!r}')
			if opt.step:
				opt.exit_after = self.resume_cmd

		if opt.exit_after and opt.exit_after not in self.gm.cmd_list:
			die(1,f'{opt.exit_after!r}: command not recognized')

		return True

	def run_tests(self,usr_args):
		self.start_time = time.time()
		self.daemon_started = False
		gname_save = None
		if usr_args:
			for arg in usr_args:
				if arg in self.gm.cmd_groups:
					if not self.init_group(arg):
						continue
					for cmd in self.gm.cmd_list:
						self.check_needs_rerun(cmd,build=True)
						do_between()
				else:
					def parse_arg(arg):
						if '.' in arg:
							a,b = arg.split('.')
							return [a] + b.split(':') if ':' in b else [a,b,None]
						elif ':' in arg:
							a,b = arg.split(':')
							return [a,None,b]
						else:
							return [self.gm.find_cmd_in_groups(arg),None,arg]

					gname,sg_name,cmdname = parse_arg(arg)

					if gname:
						same_grp = gname == gname_save # same group as previous cmd: don't clean, suppress blue msg
						if not self.init_group(gname,sg_name,cmdname,quiet=same_grp,do_clean=not same_grp):
							continue
						if cmdname:
							try:
								self.check_needs_rerun(cmdname,build=True)
							except Exception as e: # allow calling of functions not in cmd_group
								if isinstance(e,KeyError) and e.args[0] == cmdname:
									ret = getattr(self.ts,cmdname)()
									if type(ret).__name__ == 'coroutine':
										async_run(ret)
								else:
									raise
							do_between()
						else:
							for cmd in self.gm.cmd_list:
								self.check_needs_rerun(cmd,build=True)
								do_between()
						gname_save = gname
					else:
						die(1,f'{arg!r}: command not recognized')
		else:
			if opt.exclude_groups:
				exclude = opt.exclude_groups.split(',')
				for e in exclude:
					if e not in self.gm.cmd_groups_dfl:
						die(1,f'{e!r}: group not recognized')
			for gname in self.gm.cmd_groups_dfl:
				if opt.exclude_groups and gname in exclude:
					continue
				if not self.init_group(gname):
					continue
				for cmd in self.gm.cmd_list:
					self.check_needs_rerun(cmd,build=True)
					do_between()

		self.end_msg()

	def check_needs_rerun(self,cmd,
			build        = False,
			root         = True,
			force_delete = False,
			dpy          = False ):

		self.ts.test_name = cmd

		if self.ts_clsname == 'TestSuiteMain' and testing_segwit and cmd not in self.ts.segwit_do:
			return False

		rerun = root # force_delete is not passed to recursive call

		fns = []
		if force_delete or not root:
			# does cmd produce a needed dependency(ies)?
			ret = self.get_num_exts_for_cmd(cmd,dpy)
			if ret:
				for ext in ret[1]:
					fn = get_file_with_ext(cfgs[ret[0]]['tmpdir'],ext,delete=build)
					if fn:
						if force_delete: os.unlink(fn)
						else: fns.append(fn)
					else: rerun = True

		fdeps = self.generate_file_deps(cmd)
		cdeps = self.generate_cmd_deps(fdeps)

		for fn in fns:
			my_age = os.stat(fn).st_mtime
			for num,ext in fdeps:
				f = get_file_with_ext(cfgs[num]['tmpdir'],ext,delete=build)
				if f and os.stat(f).st_mtime > my_age:
					rerun = True

		for cdep in cdeps:
			if self.check_needs_rerun(cdep,build=build,root=False,dpy=cmd):
				rerun = True

		if build:
			if rerun:
				for fn in fns:
					if not root:
						os.unlink(fn)
				if not (dpy and opt.skipping_deps):
					self.run_test(cmd)
				if not root:
					do_between()
		else:
			# If prog produces multiple files:
			if cmd not in self.rebuild_list or rerun == True:
				self.rebuild_list[cmd] = (rerun,fns[0] if fns else '') # FIX

		return rerun

	def run_test(self,cmd):

		d = [(str(num),ext) for exts,num in self.gm.dpy_data[cmd][2] for ext in exts]

		# delete files depended on by this cmd
		arg_list = [get_file_with_ext(cfgs[num]['tmpdir'],ext) for num,ext in d]

		# remove shared_deps from arg list
		if hasattr(self.ts,'shared_deps'):
			arg_list = arg_list[:-len(self.ts.shared_deps)]

		if self.resume_cmd:
			if cmd != self.resume_cmd:
				return
			bmsg(f'Resuming at {self.resume_cmd!r}')
			self.resume_cmd = None
			opt.skipping_deps = False
			opt.resuming = False

		if opt.profile:
			start = time.time()

		self.ts.test_name = cmd # NB: Do not remove, this needs to be set twice
		cdata = self.gm.dpy_data[cmd]
#		self.ts.test_dpydata = cdata
		self.ts.tmpdir_num = cdata[0]
#		self.ts.cfg = cfgs[str(cdata[0])] # will remove this eventually
		cfg = cfgs[str(cdata[0])]
		for k in (  'seed_len', 'seed_id',
					'wpasswd', 'kapasswd',
					'segwit', 'hash_preset',
					'bw_filename', 'bw_params', 'ref_bw_seed_id',
					'addr_idx_list', 'pass_idx_list' ):
			if k in cfg:
				setattr(self.ts,k,cfg[k])

		ret = getattr(self.ts,cmd)(*arg_list) # run the test
		if type(ret).__name__ == 'coroutine':
			ret = async_run(ret)
		self.process_retval(cmd,ret)

		if opt.profile:
			omsg('\r\033[50C{:.4f}'.format( time.time() - start ))

		if cmd == opt.exit_after:
			sys.exit(0)

	def warn_skipped(self):
		if self.skipped_warnings:
			print(yellow('The following tests were skipped and may require attention:'))
			r = '-' * 72 + '\n'
			print(r+('\n'+r).join(self.skipped_warnings))

	def process_retval(self,cmd,ret):
		if type(ret).__name__ == 'MMGenPexpect':
			ret.ok()
			self.cmd_total += 1
		elif ret == 'ok':
			ok()
			self.cmd_total += 1
		elif ret in ('skip','silent'):
			pass
		elif type(ret) == tuple and ret[0] == 'skip_warn':
			self.skipped_warnings.append(
				'Test {!r} was skipped:\n  {}'.format(cmd,'\n  '.join(ret[1].split('\n'))))
		else:
			die(2,f'{cmd!r} returned {ret}')

	def check_deps(self,cmds): # TODO: broken
		if len(cmds) != 1:
			die(1,f'Usage: {g.prog_name} check_deps <command>')

		cmd = cmds[0]

		if cmd not in self.gm.cmd_list:
			die(1,f'{cmd!r}: unrecognized command')

		if not opt.quiet:
			omsg(f'Checking dependencies for {cmd!r}')

		self.check_needs_rerun(self.ts,cmd,build=False)

		w = max(map(len,self.rebuild_list)) + 1
		for cmd in self.rebuild_list:
			c = self.rebuild_list[cmd]
			m = 'Rebuild' if (c[0] and c[1]) else 'Build' if c[0] else 'OK'
			omsg('cmd {:<{w}} {}'.format( cmd+':', m, w=w ))

	def generate_file_deps(self,cmd):
		return [(str(n),e) for exts,n in self.gm.dpy_data[cmd][2] for e in exts]

	def generate_cmd_deps(self,fdeps):
		return [cfgs[str(n)]['dep_generators'][ext] for n,ext in fdeps]

	def get_num_exts_for_cmd(self,cmd,dpy=False): # dpy ignored here
		try:
			num = str(self.gm.dpy_data[cmd][0])
		except KeyError:
			qmsg_r(f'Missing dependency {cmd!r}')
			gname = self.gm.find_cmd_in_groups(cmd)
			if gname:
				kwargs = self.gm.cmd_groups[gname][1]
				kwargs.update({'add_dpy':True})
				self.gm.create_group(gname,None,**kwargs)
				num = str(self.gm.dpy_data[cmd][0])
				qmsg(f' found in group {gname!r}')
			else:
				qmsg(' not found in any command group!')
				raise
		dgl = cfgs[num]['dep_generators']
		if cmd in dgl.values():
			exts = [k for k in dgl if dgl[k] == cmd]
			return (num,exts)
		else:
			return None

# main()

if not opt.skipping_deps: # do this before list cmds exit, so we stay in sync with shm_dir
	create_tmp_dirs(shm_dir)

if opt.list_cmd_groups:
	CmdGroupMgr().list_cmd_groups()
elif opt.list_cmds:
	list_cmds()
elif usr_args and usr_args[0] in utils:
	globals()[usr_args[0]](*usr_args[1:])
	sys.exit(0)

if opt.pause:
	set_restore_term_at_exit()

set_environ_for_spawned_scripts()

from mmgen.exception import TestSuiteException,TestSuiteFatalException

try:
	tr = TestSuiteRunner(data_dir,trash_dir)
	tr.run_tests(usr_args)
	tr.warn_skipped()
	if tr.daemon_started:
		stop_test_daemons(network_id)
except KeyboardInterrupt:
	if tr.daemon_started:
		stop_test_daemons(network_id)
	tr.warn_skipped()
	die(1,'\ntest.py exiting at user request')
except TestSuiteException as e:
	die(2,e.args[0])
except TestSuiteFatalException as e:
	die(4,e.args[0])
except Exception:
	if 'exec_wrapper_init' in globals(): # test.py itself is running under exec_wrapper
		import traceback
		print(''.join(traceback.format_exception(*sys.exc_info())))
		msg(blue('Test script exited with error'))
	else:
		msg(blue('Spawned script exited with error'))
	raise
except:
	raise