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# -*- coding: utf-8 -*-
#***********************************************************************
# This file is part of OpenMolcas. *
# *
# OpenMolcas is free software; you can redistribute it and/or modify *
# it under the terms of the GNU Lesser General Public License, v. 2.1. *
# OpenMolcas is distributed in the hope that it will be useful, but it *
# is provided "as is" and without any express or implied warranties. *
# For more details see the full text of the license in the file *
# LICENSE or in <http://www.gnu.org/licenses/>. *
# *
# Copyright (C) 2015-2017, Ignacio Fdez. Galván *
#***********************************************************************
from __future__ import (unicode_literals, division, absolute_import, print_function)
from pyparsing import ParseException, __version__ as pyparsing_version
from emil_grammar import EMIL_Grammar
from abstract_flow import *
from re import match, search, IGNORECASE, compile as re_compile
# set of precompiled regular expressions
re_export = re_compile(r'export\s+(\S*)\s*=\s*(.*?)\s*$', flags=IGNORECASE)
re_eval = re_compile(r'eval\s+(\S*)\s*=\s*(.*?)\s*$', flags=IGNORECASE)
re_exit = re_compile(r'exit(\s+(\d+|\$\w*)?)?\s*$', flags=IGNORECASE)
re_shell = re_compile(r'(?:shell|unix)\s+(\S.*?)\s*$', flags=IGNORECASE)
re_exec = re_compile(r'exec\s+(\S.*?)\s*$', flags=IGNORECASE)
re_include = re_compile(r'include\s+(\S.*?)\s*$', flags=IGNORECASE)
re_dowhile = re_compile(r'do\s*while\s*$', flags=IGNORECASE)
re_enddo = re_compile(r'end\s*do\s*$', flags=IGNORECASE)
re_foreach = re_compile(r'foreach\s+(\w+)\s+in\s+\(\s*(.*?)\s*\)\s*$', flags=IGNORECASE)
re_endforeach = re_compile(r'end\s*foreach\s*$', flags=IGNORECASE)
re_dogeo = re_compile(r'do\s*geo\s*$', flags=IGNORECASE)
re_if = re_compile(r'if\s*\(\s*(.*?)\s*(=+|!=|ne|-file)\s*(\S.*?)\s*\)\s*$', flags=IGNORECASE)
re_ifgoto = re_compile(r'if\s*\(\s*(.*?)\s*(=+|!=|ne|-file)\s*(\S.*?)\s*\)\s*go\s*to\s+(\S+)\s*$', flags=IGNORECASE)
re_endif = re_compile(r'end\s*if\s*$', flags=IGNORECASE)
re_echo = re_compile(r'echo\s+(\S.*?)\s*$', flags=IGNORECASE)
re_file = re_compile(r'file\s+(\S.*?)\s*$', flags=IGNORECASE)
re_rm = re_compile(r'rm\s+(-?force\s+)?(\S.*?)\s*$', flags=IGNORECASE)
re_copy = re_compile(r'(copy|save|clone|collect)\s+(-?force\s+)?(\S*)\s+(\S*)\s*$', flags=IGNORECASE)
re_label = re_compile(r'label\s+(\S+)\s*$', flags=IGNORECASE)
re_goto = re_compile(r'go\s*to\s+(\S+)\s*$', flags=IGNORECASE)
class EMILException(Exception):
pass
# TODO: check for "ln" once (if) LINK is supported
def check_commandline(item, commandline, forbidden=None):
name = match(r'\S*', item).group(0).upper()
if (forbidden is not None):
if (search(forbidden, commandline)):
raise EMILException('Forbidden characters in "{0}" command'.format(name))
if (match(r'cp\s', commandline)):
raise EMILException('Use COPY instead of "{0} cp"'.format(name))
if (match(r'rm\s', commandline)):
raise EMILException('Use RM instead of "{0} rm"'.format(name))
if (match(r'export\s', commandline)):
raise EMILException('Use EXPORT instead of "{0} export"'.format(name))
################################################################################
# Parse the result of an initial EMIL_Grammar run into abstract flow tokens
################################################################################
def EMIL_Parse(input_file):
'''Parse an input file in EMIL language, returns a tuple where the first
element is Group of abstract flow tokens, and the second element is
a possibly empty dictionary of files embedded files (filename: content)
'''
# Open the file first, to ensure it is utf8-encoded
with utf8_open(input_file, 'r') as f_in:
try:
items = EMIL_Grammar.parseFile(f_in, parseAll=True).asList()
except ParseException as e:
if (pyparsing_version >= '2.0.2'):
raise EMILException('Parsing error: {0}\n{1}'.format(e, e.markInputline()))
else:
raise EMILException('Parsing error: {0}'.format(e))
blocks = [[]]
files = {}
level = 0
leveltype = [['main']]
# Process each parsed item, adding the corresponding "Statement" subclass
# to the token list
for item in items:
if (item[0] == '&'):
# Remove final empty lines (empty lines in the middle could be significant)
while (item[-1] == ''):
del item[-1]
blocks[level].append(Program(item))
elif (item[0] == '>'):
# TODO: variant/option for binary files?
# >>> FILE
# this is not added to the token list, but returned as a separate dict
# so the wrapper can create the files before running the tokens
if (re_file.match(item[1])):
re_match = re_file.match(item[1])
filename = re_match.group(1)
files[filename]=item[2]
# >>> EXIT
elif (re_exit.match(item[1])):
re_match = re_exit.match(item[1])
val = re_match.group(2)
blocks[level].append(Break(val))
# >>> EXPORT
elif (re_export.match(item[1])):
re_match = re_export.match(item[1])
blocks[level].append(Assignment(re_match.group(1), re_match.group(2)))
# >>> EVAL
elif (re_eval.match(item[1])):
re_match = re_eval.match(item[1])
blocks[level].append(Assignment(re_match.group(1), re_match.group(2), literal=False))
# >>> UNIX
# >>> SHELL
elif (re_shell.match(item[1])):
re_match = re_shell.match(item[1])
check_commandline(item[1], re_match.group(1))
blocks[level].append(System(re_match.group(1)))
# >>> EXEC
elif (re_exec.match(item[1])):
re_match = re_exec.match(item[1])
check_commandline(item[1], re_match.group(1), r'[&`;>\\]')
blocks[level].append(System(re_match.group(1), parallel=True))
# TODO: variant for including code inside a module
# >>> INCLUDE
elif (re_include.match(item[1])):
re_match = re_include.match(item[1])
blocks[level].append(Include(re_match.group(1)))
# >>> DO WHILE
elif (re_dowhile.match(item[1])):
blocks.append([])
level += 1
leveltype.append(['dowhile'])
# >>> END DO
elif (re_enddo.match(item[1])):
if ((leveltype[level][0] != 'dowhile') and (leveltype[level][0] != 'foreach')):
raise EMILException('Grouping error')
# Do not allow empty DO loops
if (len(blocks[level]) > 0):
if (leveltype[level][0] == 'foreach'):
var = leveltype[level][1]
val = leveltype[level][2]
else:
var = None
val = None
for item in blocks[level]:
item.level = level
blocks[level-1].append(Group(blocks[level], rerun=True, var=var, val=val))
level -= 1
blocks.pop()
leveltype.pop()
# >>> IF
# >>> IF () GOTO
elif (re_if.match(item[1]) or re_ifgoto.match(item[1])):
re_match = re_if.match(item[1]) or re_ifgoto.match(item[1])
var = re_match.group(1)
op = re_match.group(2).lower()
val = re_match.group(3)
name = None
if (re_match.lastindex > 3):
name = re_match.group(4)
if (var.lower() == 'iter'):
var = '$MOLCAS_ITER'
if (op == '-file'):
if (var != ''):
raise EMILException('Error parsing IF command')
test = Expression(var, 'file', val)
elif ((op == 'ne') or (op == '!=')):
test = Expression(var, 'ne', val)
else:
test = Expression(var, 'eq', val)
if (name):
item = Jump(name)
item.level = level+1
blocks[level].append(Group([item], condition=test))
else:
blocks.append([])
level += 1
leveltype.append(['if', test])
# >>> END IF
elif (re_endif.match(item[1])):
if (leveltype[level][0] != 'if'):
raise EMILException('Grouping error')
if (len(blocks[level]) > 0):
test = leveltype[level][1]
for item in blocks[level]:
item.level = level
blocks[level-1].append(Group(blocks[level], condition=test))
level -= 1
blocks.pop()
leveltype.pop()
# >>> ECHO (undocumented)
elif (re_echo.match(item[1])):
re_match = re_echo.match(item[1])
blocks[level].append(Setting('echo', re_match.group(1).lower()))
# >>> RM
elif (re_rm.match(item[1])):
re_match = re_rm.match(item[1])
blocks[level].append(ParTask('rm', (re_match.group(1) is not None), [re_match.group(2)]))
# >>> COPY, SAVE, CLONE, COLLECT
elif (re_copy.match(item[1])):
re_match = re_copy.match(item[1])
blocks[level].append(ParTask(re_match.group(1).lower(), (re_match.group(2) is not None), [re_match.group(3), re_match.group(4)]))
# >>> FOREACH
elif (re_foreach.match(item[1])):
re_match = re_foreach.match(item[1])
var, val = re_match.groups()
blocks.append([])
level += 1
leveltype.append(['foreach', var, val])
# >>> END FOREACH (for consistency)
elif (re_endforeach.match(item[1])):
if (leveltype[level][0] != 'foreach'):
raise EMILException('Grouping error')
# Allow empty foreach loops
#if (len(blocks[level]) > 0):
if (True):
var = leveltype[level][1]
val = leveltype[level][2]
for item in blocks[level]:
item.level = level
blocks[level-1].append(Group(blocks[level], rerun=True, var=var, val=val))
level -= 1
blocks.pop()
leveltype.pop()
# >>> LABEL
elif (re_label.match(item[1])):
re_match = re_label.match(item[1])
blocks[level].append(Label(re_match.group(1)))
# >>> GOTO (extension)
elif (re_goto.match(item[1])):
re_match = re_goto.match(item[1])
blocks[level].append(Jump(re_match.group(1)))
# TODO:
# >>> LINK
# >>> DO GEO
# >>> VERBATIM
# >>> ELSE (extension)
# >>> IF ... > / IF ... < (extension)
# >>> DO GEO unsupported for now
elif (re_dogeo.match(item[1])):
raise EMILException('"DO GEO" is unsupported')
else:
raise EMILException('Unknown or unsupported statement:\n > {0}'.format(item[1]))
if (level != 0):
raise EMILException('Grouping error')
return Group(blocks[0]), files
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