1

#!/usr/bin/env python3

     2

# vim: set fileencoding=utf-8 :

     3

     4

"""\

     5

YML 2 compiler version 6.2

     6

Copyleft (c), 2009-2020, Volker Birk  http://fdik.org/yml/

     7

     8

"""

     9

    10

import sys, os, codecs, locale

    11

import fileinput, unicodedata

    12

from optparse import OptionParser

    13

    14

from yml2.pyPEG import parse, u

    15

from yml2 import ymlCStyle, comment, oldSyntax

    16

import yml2.backend as backend

    17

    18

YML_DEFAULT_PATH = [os.path.dirname(backend.__file__)]

    19

    20

def printInfo(option, opt_str, value, parser):

    21

    sys.stdout.write(__doc__)

    22

    sys.exit(0)

    23

    24

def w(msg):

    25

    if isinstance(msg, BaseException):

    26

        msg = str(msg) + "\n"

    27

    if type(msg) is bytes:

    28

        msg = codecs.encode(msg, sys.stderr.encoding)

    29

    sys.stderr.write(msg)

    30

    31

def main():

    32

    optParser = OptionParser()

    33

    optParser.add_option("-C", "--old-syntax", action="store_true", dest="old_syntax",

    34

            help="syntax of YML 2 version 1.x (compatibility mode)", default=False)

    35

    optParser.add_option("-D", "--emit-linenumbers", action="store_true", dest="emitlinenumbers",

    36

            help="emit line numbers into the resulting XML for debugging purposes", default=False)

    37

    optParser.add_option("-E", "--encoding", dest="encoding", metavar="ENCODING", default=locale.getdefaultlocale()[1],

    38

            help="encoding of input files (default to locale)")

    39

    optParser.add_option("-I", "--include", dest="includePathText", metavar="INCLUDE_PATH",

    40

            help="precede YML_PATH by a colon separated INCLUDE_PATH to search for include files")

    41

    optParser.add_option("-m", "--omit-empty-parm-tags", action="store_true", dest="omitemptyparm",

    42

            help="does nothing (only there for compatibility reasons)", default=False)

    43

    optParser.add_option("-n", "--normalization", dest="normalization", metavar="NORMALIZATION", default="NFC",

    44

            help="Unicode normalization (none, NFD, NFKD, NFC, NFKC, FCD, default is NFC)")

    45

    optParser.add_option("-o", "--output", dest="outputFile", metavar="FILE",

    46

            help="place output in file FILE")

    47

    optParser.add_option("-p", "--parse-only", action="store_true", dest="parseonly",

    48

            help="parse only, then output pyAST as text to stdout", default=False)

    49

    optParser.add_option("-V", "--version", action="callback", callback=printInfo, help="show version info")

    50

    (options, args) = optParser.parse_args()

    51

    52

    if options.old_syntax:

    53

        oldSyntax()

    54

    55

    if options.emitlinenumbers:

    56

        backend.emitlinenumbers = True

    57

    58

    backend.encoding = options.encoding

    59

    60

    try:

    61

        if options.includePathText:

    62

            backend.includePath = options.includePathText.split(':')

    63

    64

        dirs = os.environ.get('YML_PATH', '.').split(':') + YML_DEFAULT_PATH

    65

        backend.includePath.extend(dirs)

    66

    67

        files = fileinput.input(args, mode="rU", openhook=fileinput.hook_encoded(options.encoding))

    68

    69

        ymlC = ymlCStyle()

    70

        result = parse(ymlC, files, True, comment, packrat=True)

    71

    72

        if options.parseonly:

    73

            print(result)

    74

        else:

    75

            result = backend.finish(result)

    76

            if options.normalization != "none":

    77

                result = unicodedata.normalize(options.normalization, result)

    78

    79

            if options.outputFile and options.outputFile != "-":

    80

                outfile = open(options.outputFile, "wb")

    81

                outfile.write(codecs.encode(result, options.encoding))

    82

                outfile.close()

    83

            else:

    84

                sys.stdout.buffer.write(codecs.encode(result, options.encoding))

    85

                print()

    86

    87

    except KeyboardInterrupt:

    88

        w("\n")

    89

        sys.exit(1)

    90

    except KeyError as msg:

    91

        w("not found: " + u(msg) + "\n")

    92

        sys.exit(4)

    93

    except LookupError as msg:

    94

        w("not found: " + u(msg) + "\n")

    95

        sys.exit(4)

    96

    except Exception as msg:

    97

        w(msg)

    98

        sys.exit(5)

    99

   100

   101

if __name__ == "__main__":