125 lines
3.6 KiB
Python
125 lines
3.6 KiB
Python
|
# Copyright 2015 The TensorFlow Authors. All Rights Reserved.
|
||
|
|
#
|
||
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
# you may not use this file except in compliance with the License.
|
||
|
|
# You may obtain a copy of the License at
|
||
|
|
#
|
||
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
#
|
||
|
|
# Unless required by applicable law or agreed to in writing, software
|
||
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
# See the License for the specific language governing permissions and
|
||
|
|
# limitations under the License.
|
||
|
|
# ==============================================================================
|
||
|
|
|
||
|
|
"""Generic entry point script."""
|
||
|
|
|
||
|
|
import errno as _errno
|
||
|
|
import sys as _sys
|
||
|
|
|
||
|
|
from . import flags
|
||
|
|
|
||
|
|
|
||
|
|
def _usage(shorthelp):
|
||
|
|
"""Writes __main__'s docstring to stdout with some help text.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
shorthelp: bool, if True, prints only flags from the main module,
|
||
|
|
rather than all flags.
|
||
|
|
"""
|
||
|
|
doc = _sys.modules["__main__"].__doc__
|
||
|
|
if not doc:
|
||
|
|
doc = "\nUSAGE: %s [flags]\n" % _sys.argv[0]
|
||
|
|
doc = flags.text_wrap(doc, indent=" ", firstline_indent="")
|
||
|
|
else:
|
||
|
|
# Replace all '%s' with sys.argv[0], and all '%%' with '%'.
|
||
|
|
num_specifiers = doc.count("%") - 2 * doc.count("%%")
|
||
|
|
try:
|
||
|
|
doc %= (_sys.argv[0],) * num_specifiers
|
||
|
|
except (OverflowError, TypeError, ValueError):
|
||
|
|
# Just display the docstring as-is.
|
||
|
|
pass
|
||
|
|
if shorthelp:
|
||
|
|
flag_str = flags.FLAGS.main_module_help()
|
||
|
|
else:
|
||
|
|
flag_str = str(flags.FLAGS)
|
||
|
|
try:
|
||
|
|
_sys.stdout.write(doc)
|
||
|
|
if flag_str:
|
||
|
|
_sys.stdout.write("\nflags:\n")
|
||
|
|
_sys.stdout.write(flag_str)
|
||
|
|
_sys.stdout.write("\n")
|
||
|
|
except IOError as e:
|
||
|
|
# We avoid printing a huge backtrace if we get EPIPE, because
|
||
|
|
# "foo.par --help | less" is a frequent use case.
|
||
|
|
if e.errno != _errno.EPIPE:
|
||
|
|
raise
|
||
|
|
|
||
|
|
|
||
|
|
class _HelpFlag(flags.BooleanFlag):
|
||
|
|
"""Special boolean flag that displays usage and raises SystemExit."""
|
||
|
|
|
||
|
|
NAME = "help"
|
||
|
|
SHORT_NAME = "h"
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
super().__init__(
|
||
|
|
self.NAME, False, "show this help", short_name=self.SHORT_NAME
|
||
|
|
)
|
||
|
|
|
||
|
|
def parse(self, arg):
|
||
|
|
if arg:
|
||
|
|
_usage(shorthelp=True)
|
||
|
|
print()
|
||
|
|
print("Try --helpfull to get a list of all flags.")
|
||
|
|
_sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
class _HelpshortFlag(_HelpFlag):
|
||
|
|
"""--helpshort is an alias for --help."""
|
||
|
|
|
||
|
|
NAME = "helpshort"
|
||
|
|
SHORT_NAME = None
|
||
|
|
|
||
|
|
|
||
|
|
class _HelpfullFlag(flags.BooleanFlag):
|
||
|
|
"""Display help for flags in main module and all dependent modules."""
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
super().__init__("helpfull", False, "show full help")
|
||
|
|
|
||
|
|
def parse(self, arg):
|
||
|
|
if arg:
|
||
|
|
_usage(shorthelp=False)
|
||
|
|
_sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
_define_help_flags_called = False
|
||
|
|
|
||
|
|
|
||
|
|
def _define_help_flags():
|
||
|
|
global _define_help_flags_called
|
||
|
|
if not _define_help_flags_called:
|
||
|
|
flags.DEFINE_flag(_HelpFlag())
|
||
|
|
flags.DEFINE_flag(_HelpfullFlag())
|
||
|
|
flags.DEFINE_flag(_HelpshortFlag())
|
||
|
|
_define_help_flags_called = True
|
||
|
|
|
||
|
|
|
||
|
|
# @tf_export('app.run')
|
||
|
|
def run(main=None, argv=None):
|
||
|
|
"""Runs the program with an optional 'main' function and 'argv' list."""
|
||
|
|
|
||
|
|
# Define help flags.
|
||
|
|
_define_help_flags()
|
||
|
|
|
||
|
|
# Parse known flags.
|
||
|
|
argv = flags.FLAGS(_sys.argv if argv is None else argv, known_only=True)
|
||
|
|
|
||
|
|
main = main or _sys.modules["__main__"].main
|
||
|
|
|
||
|
|
# Call the main function, passing through any arguments
|
||
|
|
# to the final program.
|
||
|
|
_sys.exit(main(argv))
|