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update glib to 2.66.3 add gthread library and .pc files
2020-12-11 13:28:41 +00:00
#!/usr/bin/env python3
# If the code below looks horrible and unpythonic, do not panic.
#
# It is.
#
# This is a manual conversion from the original Perl script to
# Python. Improvements are welcome.
#
from __future__ import print_function, unicode_literals
import argparse
import os
import re
import sys
import tempfile
import io
import errno
import codecs
import locale
VERSION_STR = '''glib-mkenums version 2.66.3
glib-mkenums comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of glib-mkenums under the terms of
the GNU General Public License which can be found in the
GLib source package. Sources, examples and contact
information are available at http://www.gtk.org'''
# pylint: disable=too-few-public-methods
class Color:
'''ANSI Terminal colors'''
GREEN = '\033[1;32m'
BLUE = '\033[1;34m'
YELLOW = '\033[1;33m'
RED = '\033[1;31m'
END = '\033[0m'
def print_color(msg, color=Color.END, prefix='MESSAGE'):
'''Print a string with a color prefix'''
if os.isatty(sys.stderr.fileno()):
real_prefix = '{start}{prefix}{end}'.format(start=color, prefix=prefix, end=Color.END)
else:
real_prefix = prefix
print('{prefix}: {msg}'.format(prefix=real_prefix, msg=msg), file=sys.stderr)
def print_error(msg):
'''Print an error, and terminate'''
print_color(msg, color=Color.RED, prefix='ERROR')
sys.exit(1)
def print_warning(msg, fatal=False):
'''Print a warning, and optionally terminate'''
if fatal:
color = Color.RED
prefix = 'ERROR'
else:
color = Color.YELLOW
prefix = 'WARNING'
print_color(msg, color, prefix)
if fatal:
sys.exit(1)
def print_info(msg):
'''Print a message'''
print_color(msg, color=Color.GREEN, prefix='INFO')
def get_rspfile_args(rspfile):
'''
Response files are useful on Windows where there is a command-line character
limit of 8191 because when passing sources as arguments to glib-mkenums this
limit can be exceeded in large codebases.
There is no specification for response files and each tool that supports it
generally writes them out in slightly different ways, but some sources are:
https://docs.microsoft.com/en-us/visualstudio/msbuild/msbuild-response-files
https://docs.microsoft.com/en-us/windows/desktop/midl/the-response-file-command
'''
import shlex
if not os.path.isfile(rspfile):
sys.exit('Response file {!r} does not exist'.format(rspfile))
try:
with open(rspfile, 'r') as f:
cmdline = f.read()
except OSError as e:
sys.exit('Response file {!r} could not be read: {}'
.format(rspfile, e.strerror))
return shlex.split(cmdline)
def write_output(output):
global output_stream
print(output, file=output_stream)
# Python 2 defaults to ASCII in case stdout is redirected.
# This should make it match Python 3, which uses the locale encoding.
if sys.stdout.encoding is None:
output_stream = codecs.getwriter(
locale.getpreferredencoding())(sys.stdout)
else:
output_stream = sys.stdout
# Some source files aren't UTF-8 and the old perl version didn't care.
# Replace invalid data with a replacement character to keep things working.
# https://bugzilla.gnome.org/show_bug.cgi?id=785113#c20
def replace_and_warn(err):
# 7 characters of context either side of the offending character
print_warning('UnicodeWarning: {} at {} ({})'.format(
err.reason, err.start,
err.object[err.start - 7:err.end + 7]))
return ('?', err.end)
codecs.register_error('replace_and_warn', replace_and_warn)
# glib-mkenums.py
# Information about the current enumeration
flags = None # Is enumeration a bitmask?
option_underscore_name = '' # Overridden underscore variant of the enum name
# for example to fix the cases we don't get the
# mixed-case -> underscorized transform right.
option_lowercase_name = '' # DEPRECATED. A lower case name to use as part
# of the *_get_type() function, instead of the
# one that we guess. For instance, when an enum
# uses abnormal capitalization and we can not
# guess where to put the underscores.
option_since = '' # User provided version info for the enum.
seenbitshift = 0 # Have we seen bitshift operators?
enum_prefix = None # Prefix for this enumeration
enumname = '' # Name for this enumeration
enumshort = '' # $enumname without prefix
enumname_prefix = '' # prefix of $enumname
enumindex = 0 # Global enum counter
firstenum = 1 # Is this the first enumeration per file?
entries = [] # [ name, val ] for each entry
sandbox = None # sandbox for safe evaluation of expressions
output = '' # Filename to write result into
def parse_trigraph(opts):
result = {}
for opt in re.split(r'\s*,\s*', opts):
opt = re.sub(r'^\s*', '', opt)
opt = re.sub(r'\s*$', '', opt)
m = re.search(r'(\w+)(?:=(.+))?', opt)
assert m is not None
groups = m.groups()
key = groups[0]
if len(groups) > 1:
val = groups[1]
else:
val = 1
result[key] = val
return result
def parse_entries(file, file_name):
global entries, enumindex, enumname, seenbitshift, flags
looking_for_name = False
while True:
line = file.readline()
if not line:
break
line = line.strip()
# read lines until we have no open comments
while re.search(r'/\*([^*]|\*(?!/))*$', line):
line += file.readline()
# strip comments w/o options
line = re.sub(r'''/\*(?!<)
([^*]+|\*(?!/))*
\*/''', '', line, flags=re.X)
line = line.rstrip()
# skip empty lines
if len(line.strip()) == 0:
continue
if looking_for_name:
m = re.match(r'\s*(\w+)', line)
if m:
enumname = m.group(1)
return True
# Handle include files
m = re.match(r'\#include\s*<([^>]*)>', line)
if m:
newfilename = os.path.join("..", m.group(1))
newfile = io.open(newfilename, encoding="utf-8",
errors="replace_and_warn")
if not parse_entries(newfile, newfilename):
return False
else:
continue
m = re.match(r'\s*\}\s*(\w+)', line)
if m:
enumname = m.group(1)
enumindex += 1
return 1
m = re.match(r'\s*\}', line)
if m:
enumindex += 1
looking_for_name = True
continue
m = re.match(r'''\s*
(\w+)\s* # name
(?:=( # value
\s*\w+\s*\(.*\)\s* # macro with multiple args
| # OR
(?:[^,/]|/(?!\*))* # anything but a comma or comment
))?,?\s*
(?:/\*< # options
(([^*]|\*(?!/))*)
>\s*\*/)?,?
\s*$''', line, flags=re.X)
if m:
groups = m.groups()
name = groups[0]
value = None
options = None
if len(groups) > 1:
value = groups[1]
if len(groups) > 2:
options = groups[2]
if flags is None and value is not None and '<<' in value:
seenbitshift = 1
if options is not None:
options = parse_trigraph(options)
if 'skip' not in options:
entries.append((name, value, options.get('nick')))
else:
entries.append((name, value))
elif re.match(r's*\#', line):
pass
else:
print_warning('Failed to parse "{}" in {}'.format(line, file_name))
return False
help_epilog = '''Production text substitutions:
\u0040EnumName\u0040 PrefixTheXEnum
\u0040enum_name\u0040 prefix_the_xenum
\u0040ENUMNAME\u0040 PREFIX_THE_XENUM
\u0040ENUMSHORT\u0040 THE_XENUM
\u0040ENUMPREFIX\u0040 PREFIX
\u0040enumsince\u0040 the user-provided since value given
\u0040VALUENAME\u0040 PREFIX_THE_XVALUE
\u0040valuenick\u0040 the-xvalue
\u0040valuenum\u0040 the integer value (limited support, Since: 2.26)
\u0040type\u0040 either enum or flags
\u0040Type\u0040 either Enum or Flags
\u0040TYPE\u0040 either ENUM or FLAGS
\u0040filename\u0040 name of current input file
\u0040basename\u0040 base name of the current input file (Since: 2.22)
'''
# production variables:
idprefix = "" # "G", "Gtk", etc
symprefix = "" # "g", "gtk", etc, if not just lc($idprefix)
fhead = "" # output file header
fprod = "" # per input file production
ftail = "" # output file trailer
eprod = "" # per enum text (produced prior to value itarations)
vhead = "" # value header, produced before iterating over enum values
vprod = "" # value text, produced for each enum value
vtail = "" # value tail, produced after iterating over enum values
comment_tmpl = "" # comment template
def read_template_file(file):
global idprefix, symprefix, fhead, fprod, ftail, eprod, vhead, vprod, vtail, comment_tmpl
tmpl = {'file-header': fhead,
'file-production': fprod,
'file-tail': ftail,
'enumeration-production': eprod,
'value-header': vhead,
'value-production': vprod,
'value-tail': vtail,
'comment': comment_tmpl,
}
in_ = 'junk'
ifile = io.open(file, encoding="utf-8", errors="replace_and_warn")
for line in ifile:
m = re.match(r'\/\*\*\*\s+(BEGIN|END)\s+([\w-]+)\s+\*\*\*\/', line)
if m:
if in_ == 'junk' and m.group(1) == 'BEGIN' and m.group(2) in tmpl:
in_ = m.group(2)
continue
elif in_ == m.group(2) and m.group(1) == 'END' and m.group(2) in tmpl:
in_ = 'junk'
continue
else:
sys.exit("Malformed template file " + file)
if in_ != 'junk':
tmpl[in_] += line
if in_ != 'junk':
sys.exit("Malformed template file " + file)
fhead = tmpl['file-header']
fprod = tmpl['file-production']
ftail = tmpl['file-tail']
eprod = tmpl['enumeration-production']
vhead = tmpl['value-header']
vprod = tmpl['value-production']
vtail = tmpl['value-tail']
comment_tmpl = tmpl['comment']
parser = argparse.ArgumentParser(epilog=help_epilog,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('--identifier-prefix', default='', dest='idprefix',
help='Identifier prefix')
parser.add_argument('--symbol-prefix', default='', dest='symprefix',
help='Symbol prefix')
parser.add_argument('--fhead', default=[], dest='fhead', action='append',
help='Output file header')
parser.add_argument('--ftail', default=[], dest='ftail', action='append',
help='Output file footer')
parser.add_argument('--fprod', default=[], dest='fprod', action='append',
help='Put out TEXT every time a new input file is being processed.')
parser.add_argument('--eprod', default=[], dest='eprod', action='append',
help='Per enum text, produced prior to value iterations')
parser.add_argument('--vhead', default=[], dest='vhead', action='append',
help='Value header, produced before iterating over enum values')
parser.add_argument('--vprod', default=[], dest='vprod', action='append',
help='Value text, produced for each enum value.')
parser.add_argument('--vtail', default=[], dest='vtail', action='append',
help='Value tail, produced after iterating over enum values')
parser.add_argument('--comments', default='', dest='comment_tmpl',
help='Comment structure')
parser.add_argument('--template', default='', dest='template',
help='Template file')
parser.add_argument('--output', default=None, dest='output')
parser.add_argument('--version', '-v', default=False, action='store_true', dest='version',
help='Print version information')
parser.add_argument('args', nargs='*',
help='One or more input files, or a single argument @rspfile_path '
'pointing to a file that contains the actual arguments')
# Support reading an rspfile of the form @filename which contains the args
# to be parsed
if len(sys.argv) == 2 and sys.argv[1].startswith('@'):
args = get_rspfile_args(sys.argv[1][1:])
else:
args = sys.argv[1:]
options = parser.parse_args(args)
if options.version:
print(VERSION_STR)
sys.exit(0)
def unescape_cmdline_args(arg):
arg = arg.replace('\\n', '\n')
arg = arg.replace('\\r', '\r')
return arg.replace('\\t', '\t')
if options.template != '':
read_template_file(options.template)
idprefix += options.idprefix
symprefix += options.symprefix
# This is a hack to maintain some semblance of backward compatibility with
# the old, Perl-based glib-mkenums. The old tool had an implicit ordering
# on the arguments and templates; each argument was parsed in order, and
# all the strings appended. This allowed developers to write:
#
# glib-mkenums \
# --fhead ... \
# --template a-template-file.c.in \
# --ftail ...
#
# And have the fhead be prepended to the file-head stanza in the template,
# as well as the ftail be appended to the file-tail stanza in the template.
# Short of throwing away ArgumentParser and going over sys.argv[] element
# by element, we can simulate that behaviour by ensuring some ordering in
# how we build the template strings:
#
# - the head stanzas are always prepended to the template
# - the prod stanzas are always appended to the template
# - the tail stanzas are always appended to the template
#
# Within each instance of the command line argument, we append each value
# to the array in the order in which it appears on the command line.
fhead = ''.join([unescape_cmdline_args(x) for x in options.fhead]) + fhead
vhead = ''.join([unescape_cmdline_args(x) for x in options.vhead]) + vhead
fprod += ''.join([unescape_cmdline_args(x) for x in options.fprod])
eprod += ''.join([unescape_cmdline_args(x) for x in options.eprod])
vprod += ''.join([unescape_cmdline_args(x) for x in options.vprod])
ftail = ftail + ''.join([unescape_cmdline_args(x) for x in options.ftail])
vtail = vtail + ''.join([unescape_cmdline_args(x) for x in options.vtail])
if options.comment_tmpl != '':
comment_tmpl = unescape_cmdline_args(options.comment_tmpl)
elif comment_tmpl == "":
# default to C-style comments
comment_tmpl = "/* \u0040comment\u0040 */"
output = options.output
if output is not None:
(out_dir, out_fn) = os.path.split(options.output)
out_suffix = '_' + os.path.splitext(out_fn)[1]
if out_dir == '':
out_dir = '.'
fd, filename = tempfile.mkstemp(dir=out_dir)
os.close(fd)
tmpfile = io.open(filename, "w", encoding="utf-8")
output_stream = tmpfile
else:
tmpfile = None
# put auto-generation comment
comment = comment_tmpl.replace('\u0040comment\u0040',
'This file is generated by glib-mkenums, do '
'not modify it. This code is licensed under '
'the same license as the containing project. '
'Note that it links to GLib, so must comply '
'with the LGPL linking clauses.')
write_output("\n" + comment + '\n')
def replace_specials(prod):
prod = prod.replace(r'\\a', r'\a')
prod = prod.replace(r'\\b', r'\b')
prod = prod.replace(r'\\t', r'\t')
prod = prod.replace(r'\\n', r'\n')
prod = prod.replace(r'\\f', r'\f')
prod = prod.replace(r'\\r', r'\r')
prod = prod.rstrip()
return prod
def warn_if_filename_basename_used(section, prod):
for substitution in ('\u0040filename\u0040',
'\u0040basename\u0040'):
if substitution in prod:
print_warning('{} used in {} section.'.format(substitution,
section))
if len(fhead) > 0:
prod = fhead
warn_if_filename_basename_used('file-header', prod)
prod = replace_specials(prod)
write_output(prod)
def process_file(curfilename):
global entries, flags, seenbitshift, enum_prefix
firstenum = True
try:
curfile = io.open(curfilename, encoding="utf-8",
errors="replace_and_warn")
except IOError as e:
if e.errno == errno.ENOENT:
print_warning('No file "{}" found.'.format(curfilename))
return
raise
while True:
line = curfile.readline()
if not line:
break
line = line.strip()
# read lines until we have no open comments
while re.search(r'/\*([^*]|\*(?!/))*$', line):
line += curfile.readline()
# strip comments w/o options
line = re.sub(r'''/\*(?!<)
([^*]+|\*(?!/))*
\*/''', '', line)
# ignore forward declarations
if re.match(r'\s*typedef\s+enum.*;', line):
continue
m = re.match(r'''\s*typedef\s+enum\s*[_A-Za-z]*[_A-Za-z0-9]*\s*
({)?\s*
(?:/\*<
(([^*]|\*(?!/))*)
>\s*\*/)?
\s*({)?''', line, flags=re.X)
if m:
groups = m.groups()
if len(groups) >= 2 and groups[1] is not None:
options = parse_trigraph(groups[1])
if 'skip' in options:
continue
enum_prefix = options.get('prefix', None)
flags = options.get('flags', None)
if 'flags' in options:
if flags is None:
flags = 1
else:
flags = int(flags)
option_lowercase_name = options.get('lowercase_name', None)
option_underscore_name = options.get('underscore_name', None)
option_since = options.get('since', None)
else:
enum_prefix = None
flags = None
option_lowercase_name = None
option_underscore_name = None
option_since = None
if option_lowercase_name is not None:
if option_underscore_name is not None:
print_warning("lowercase_name overridden with underscore_name")
option_lowercase_name = None
else:
print_warning("lowercase_name is deprecated, use underscore_name")
# Didn't have trailing '{' look on next lines
if groups[0] is None and (len(groups) < 4 or groups[3] is None):
while True:
line = curfile.readline()
if not line:
print_error("Syntax error when looking for opening { in enum")
if re.match(r'\s*\{', line):
break
seenbitshift = 0
entries = []
# Now parse the entries
parse_entries(curfile, curfilename)
# figure out if this was a flags or enums enumeration
if flags is None:
flags = seenbitshift
# Autogenerate a prefix
if enum_prefix is None:
for entry in entries:
if len(entry) < 3 or entry[2] is None:
name = entry[0]
if enum_prefix is not None:
enum_prefix = os.path.commonprefix([name, enum_prefix])
else:
enum_prefix = name
if enum_prefix is None:
enum_prefix = ""
else:
# Trim so that it ends in an underscore
enum_prefix = re.sub(r'_[^_]*$', '_', enum_prefix)
else:
# canonicalize user defined prefixes
enum_prefix = enum_prefix.upper()
enum_prefix = enum_prefix.replace('-', '_')
enum_prefix = re.sub(r'(.*)([^_])$', r'\1\2_', enum_prefix)
fixed_entries = []
for e in entries:
name = e[0]
num = e[1]
if len(e) < 3 or e[2] is None:
nick = re.sub(r'^' + enum_prefix, '', name)
nick = nick.replace('_', '-').lower()
e = (name, num, nick)
fixed_entries.append(e)
entries = fixed_entries
# Spit out the output
if option_underscore_name is not None:
enumlong = option_underscore_name.upper()
enumsym = option_underscore_name.lower()
enumshort = re.sub(r'^[A-Z][A-Z0-9]*_', '', enumlong)
enumname_prefix = re.sub('_' + enumshort + '$', '', enumlong)
elif symprefix == '' and idprefix == '':
# enumname is e.g. GMatchType
enspace = re.sub(r'^([A-Z][a-z]*).*$', r'\1', enumname)
enumshort = re.sub(r'^[A-Z][a-z]*', '', enumname)
enumshort = re.sub(r'([^A-Z])([A-Z])', r'\1_\2', enumshort)
enumshort = re.sub(r'([A-Z][A-Z])([A-Z][0-9a-z])', r'\1_\2', enumshort)
enumshort = enumshort.upper()
enumname_prefix = re.sub(r'^([A-Z][a-z]*).*$', r'\1', enumname).upper()
enumlong = enspace.upper() + "_" + enumshort
enumsym = enspace.lower() + "_" + enumshort.lower()
if option_lowercase_name is not None:
enumsym = option_lowercase_name
else:
enumshort = enumname
if idprefix:
enumshort = re.sub(r'^' + idprefix, '', enumshort)
else:
enumshort = re.sub(r'/^[A-Z][a-z]*', '', enumshort)
enumshort = re.sub(r'([^A-Z])([A-Z])', r'\1_\2', enumshort)
enumshort = re.sub(r'([A-Z][A-Z])([A-Z][0-9a-z])', r'\1_\2', enumshort)
enumshort = enumshort.upper()
if symprefix:
enumname_prefix = symprefix.upper()
else:
enumname_prefix = idprefix.upper()
enumlong = enumname_prefix + "_" + enumshort
enumsym = enumlong.lower()
if option_since is not None:
enumsince = option_since
else:
enumsince = ""
if firstenum:
firstenum = False
if len(fprod) > 0:
prod = fprod
base = os.path.basename(curfilename)
prod = prod.replace('\u0040filename\u0040', curfilename)
prod = prod.replace('\u0040basename\u0040', base)
prod = replace_specials(prod)
write_output(prod)
if len(eprod) > 0:
prod = eprod
prod = prod.replace('\u0040enum_name\u0040', enumsym)
prod = prod.replace('\u0040EnumName\u0040', enumname)
prod = prod.replace('\u0040ENUMSHORT\u0040', enumshort)
prod = prod.replace('\u0040ENUMNAME\u0040', enumlong)
prod = prod.replace('\u0040ENUMPREFIX\u0040', enumname_prefix)
prod = prod.replace('\u0040enumsince\u0040', enumsince)
if flags:
prod = prod.replace('\u0040type\u0040', 'flags')
else:
prod = prod.replace('\u0040type\u0040', 'enum')
if flags:
prod = prod.replace('\u0040Type\u0040', 'Flags')
else:
prod = prod.replace('\u0040Type\u0040', 'Enum')
if flags:
prod = prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
prod = prod.replace('\u0040TYPE\u0040', 'ENUM')
prod = replace_specials(prod)
write_output(prod)
if len(vhead) > 0:
prod = vhead
prod = prod.replace('\u0040enum_name\u0040', enumsym)
prod = prod.replace('\u0040EnumName\u0040', enumname)
prod = prod.replace('\u0040ENUMSHORT\u0040', enumshort)
prod = prod.replace('\u0040ENUMNAME\u0040', enumlong)
prod = prod.replace('\u0040ENUMPREFIX\u0040', enumname_prefix)
prod = prod.replace('\u0040enumsince\u0040', enumsince)
if flags:
prod = prod.replace('\u0040type\u0040', 'flags')
else:
prod = prod.replace('\u0040type\u0040', 'enum')
if flags:
prod = prod.replace('\u0040Type\u0040', 'Flags')
else:
prod = prod.replace('\u0040Type\u0040', 'Enum')
if flags:
prod = prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
prod = prod.replace('\u0040TYPE\u0040', 'ENUM')
prod = replace_specials(prod)
write_output(prod)
if len(vprod) > 0:
prod = vprod
next_num = 0
prod = replace_specials(prod)
for name, num, nick in entries:
tmp_prod = prod
if '\u0040valuenum\u0040' in prod:
# only attempt to eval the value if it is requested
# this prevents us from throwing errors otherwise
if num is not None:
# use sandboxed evaluation as a reasonable
# approximation to C constant folding
inum = eval(num, {}, {})
# make sure it parsed to an integer
if not isinstance(inum, int):
sys.exit("Unable to parse enum value '%s'" % num)
num = inum
else:
num = next_num
tmp_prod = tmp_prod.replace('\u0040valuenum\u0040', str(num))
next_num = int(num) + 1
tmp_prod = tmp_prod.replace('\u0040VALUENAME\u0040', name)
tmp_prod = tmp_prod.replace('\u0040valuenick\u0040', nick)
if flags:
tmp_prod = tmp_prod.replace('\u0040type\u0040', 'flags')
else:
tmp_prod = tmp_prod.replace('\u0040type\u0040', 'enum')
if flags:
tmp_prod = tmp_prod.replace('\u0040Type\u0040', 'Flags')
else:
tmp_prod = tmp_prod.replace('\u0040Type\u0040', 'Enum')
if flags:
tmp_prod = tmp_prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
tmp_prod = tmp_prod.replace('\u0040TYPE\u0040', 'ENUM')
tmp_prod = tmp_prod.rstrip()
write_output(tmp_prod)
if len(vtail) > 0:
prod = vtail
prod = prod.replace('\u0040enum_name\u0040', enumsym)
prod = prod.replace('\u0040EnumName\u0040', enumname)
prod = prod.replace('\u0040ENUMSHORT\u0040', enumshort)
prod = prod.replace('\u0040ENUMNAME\u0040', enumlong)
prod = prod.replace('\u0040ENUMPREFIX\u0040', enumname_prefix)
prod = prod.replace('\u0040enumsince\u0040', enumsince)
if flags:
prod = prod.replace('\u0040type\u0040', 'flags')
else:
prod = prod.replace('\u0040type\u0040', 'enum')
if flags:
prod = prod.replace('\u0040Type\u0040', 'Flags')
else:
prod = prod.replace('\u0040Type\u0040', 'Enum')
if flags:
prod = prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
prod = prod.replace('\u0040TYPE\u0040', 'ENUM')
prod = replace_specials(prod)
write_output(prod)
for fname in sorted(options.args):
process_file(fname)
if len(ftail) > 0:
prod = ftail
warn_if_filename_basename_used('file-tail', prod)
prod = replace_specials(prod)
write_output(prod)
# put auto-generation comment
comment = comment_tmpl
comment = comment.replace('\u0040comment\u0040', 'Generated data ends here')
write_output("\n" + comment + "\n")
if tmpfile is not None:
tmpfilename = tmpfile.name
tmpfile.close()
try:
os.unlink(options.output)
except OSError as error:
if error.errno != errno.ENOENT:
raise error
os.rename(tmpfilename, options.output)
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