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# Copyright 2016 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.
# ==============================================================================
"""Readline-Based Command-Line Interface of TensorFlow Debugger (tfdbg)."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import readline
from tensorflow.python.debug.cli import base_ui
from tensorflow.python.debug.cli import debugger_cli_common
class ReadlineUI(base_ui.BaseUI):
"""Readline-based Command-line UI."""
def __init__(self, on_ui_exit=None, config=None):
base_ui.BaseUI.__init__(self, on_ui_exit=on_ui_exit, config=config)
self._init_input()
def _init_input(self):
readline.parse_and_bind("set editing-mode emacs")
# Disable default readline delimiter in order to receive the full text
# (not just the last word) in the completer.
readline.set_completer_delims("\n")
readline.set_completer(self._readline_complete)
readline.parse_and_bind("tab: complete")
# For Python 2-3 compatibility.
try:
self._input = raw_input
except NameError:
self._input = input
def _readline_complete(self, text, state):
context, prefix, except_last_word = self._analyze_tab_complete_input(text)
candidates, _ = self._tab_completion_registry.get_completions(context,
prefix)
candidates = [(except_last_word + candidate) for candidate in candidates]
return candidates[state]
def run_ui(self,
init_command=None,
title=None,
title_color=None,
enable_mouse_on_start=True):
"""Run the CLI: See the doc of base_ui.BaseUI.run_ui for more details."""
print(title)
if init_command is not None:
self._dispatch_command(init_command)
exit_token = self._ui_loop()
if self._on_ui_exit:
self._on_ui_exit()
return exit_token
def _ui_loop(self):
while True:
command = self._get_user_command()
exit_token = self._dispatch_command(command)
if exit_token is not None:
return exit_token
def _get_user_command(self):
print("")
return self._input(self.CLI_PROMPT).strip()
def _dispatch_command(self, command):
"""Dispatch user command.
Args:
command: (str) Command to dispatch.
Returns:
An exit token object. None value means that the UI loop should not exit.
A non-None value means the UI loop should exit.
"""
if command in self.CLI_EXIT_COMMANDS:
# Explicit user command-triggered exit: EXPLICIT_USER_EXIT as the exit
# token.
return debugger_cli_common.EXPLICIT_USER_EXIT
try:
prefix, args, output_file_path = self._parse_command(command)
except SyntaxError as e:
print(str(e))
return
if self._command_handler_registry.is_registered(prefix):
try:
screen_output = self._command_handler_registry.dispatch_command(
prefix, args, screen_info=None)
except debugger_cli_common.CommandLineExit as e:
return e.exit_token
else:
screen_output = debugger_cli_common.RichTextLines([
self.ERROR_MESSAGE_PREFIX + "Invalid command prefix \"%s\"" % prefix
])
self._display_output(screen_output)
if output_file_path:
try:
screen_output.write_to_file(output_file_path)
print("Wrote output to %s" % output_file_path)
except Exception: # pylint: disable=broad-except
print("Failed to write output to %s" % output_file_path)
def _display_output(self, screen_output):
for line in screen_output.lines:
print(line)
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