def testCommandHistoryHandlesWritingIOErrorGracoiusly(self):
with open(self._history_file_path, "wt") as f:
f.write("help\n")
# Change file to read-only.
os.chmod(self._history_file_path,
stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
# Reading from the file should still work.
cmd_hist_2 = debugger_cli_common.CommandHistory(
limit=3, history_file_path=self._history_file_path)
self.assertEqual(["help"], cmd_hist_2.most_recent_n(1))
# Writing should no longer work, but it should fail silently and
# the within instance-command history should still work.
cmd_hist_2.add_command("foo")
self.assertEqual(["help", "foo"], cmd_hist_2.most_recent_n(2))
cmd_hist_3 = debugger_cli_common.CommandHistory(
limit=3, history_file_path=self._history_file_path)
self.assertEqual(["help"], cmd_hist_3.most_recent_n(1))
# Change the file to back to read-write.
os.chmod(self._history_file_path,
(stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH | stat.S_IWUSR |
stat.S_IWGRP | stat.S_IWOTH))
def __init__(self):
self._screen_init()
self._screen_refresh_size()
# TODO(cais): Error out if the size of the screen is too small.
# Initialize some UI component size and locations.
self._init_layout()
self._command_handler_registry = (
debugger_cli_common.CommandHandlerRegistry())
self._command_history_store = debugger_cli_common.CommandHistory()
# Active list of command history, used in history navigation.
# _command_handler_registry holds all the history commands the CLI has
# received, up to a size limit. _active_command_history is the history
# currently being navigated in, e.g., using the Up/Down keys. The latter
# can be different from the former during prefixed or regex-based history
# navigation, e.g., when user enter the beginning of a command and hit Up.
self._active_command_history = []
# Pointer to the current position in the history sequence.
# 0 means it is a new command being keyed in.
self._command_pointer = 0
self._command_history_limit = 100
self._pending_command = ""
# State related to screen output.
self._curr_unwrapped_output = None
self._curr_wrapped_output = None
def __init__(self, on_ui_exit=None):
"""Constructor of CursesUI.
Args:
on_ui_exit: (Callable) Callback invoked when the UI exits.
"""
self._screen_init()
self._screen_refresh_size()
# TODO(cais): Error out if the size of the screen is too small.
# Initialize some UI component size and locations.
self._init_layout()
self._command_handler_registry = (
debugger_cli_common.CommandHandlerRegistry())
# Create tab completion registry and register the empty-str (top-level)
# tab-completion context with it.
self._tab_completion_registry = debugger_cli_common.TabCompletionRegistry(
)
# Create top-level tab-completion context and register the exit and help
# commands.
self._tab_completion_registry.register_tab_comp_context(
[""], self.CLI_EXIT_COMMANDS +
[debugger_cli_common.CommandHandlerRegistry.HELP_COMMAND] +
debugger_cli_common.CommandHandlerRegistry.HELP_COMMAND_ALIASES)
self._command_history_store = debugger_cli_common.CommandHistory()
# Active list of command history, used in history navigation.
# _command_handler_registry holds all the history commands the CLI has
# received, up to a size limit. _active_command_history is the history
# currently being navigated in, e.g., using the Up/Down keys. The latter
# can be different from the former during prefixed or regex-based history
# navigation, e.g., when user enter the beginning of a command and hit Up.
self._active_command_history = []
# Pointer to the current position in the history sequence.
# 0 means it is a new command being keyed in.
self._command_pointer = 0
self._command_history_limit = 100
self._pending_command = ""
# State related to screen output.
self._output_pad = None
self._output_pad_row = 0
self._output_array_pointer_indices = None
self._curr_unwrapped_output = None
self._curr_wrapped_output = None
# Register signal handler for SIGINT.
signal.signal(signal.SIGINT, self._interrupt_handler)
# Configurable callbacks.
self._on_ui_exit = on_ui_exit
def testCommandHistoryHandlesReadingIOErrorGracoiusly(self):
with open(self._history_file_path, "wt") as f:
f.write("help\n")
# Change file to not readable by anyone.
os.chmod(self._history_file_path, 0)
# The creation of a CommandHistory object should not error out.
debugger_cli_common.CommandHistory(limit=3)
def __init__(self):
self._screen_init()
self._screen_refresh_size()
# TODO(cais): Error out if the size of the screen is too small.
# Initialize some UI component size and locations.
self._init_layout()
self._command_handler_registry = (
debugger_cli_common.CommandHandlerRegistry())
# Create tab completion registry and register the empty-str (top-level)
# tab-completion context with it.
self._tab_completion_registry = debugger_cli_common.TabCompletionRegistry(
)
# Create top-level tab-completion context and register the exit and help
# commands.
self._tab_completion_registry.register_tab_comp_context(
[""], self.CLI_EXIT_COMMANDS +
[debugger_cli_common.CommandHandlerRegistry.HELP_COMMAND] +
debugger_cli_common.CommandHandlerRegistry.HELP_COMMAND_ALIASES)
self._command_history_store = debugger_cli_common.CommandHistory()
# Active list of command history, used in history navigation.
# _command_handler_registry holds all the history commands the CLI has
# received, up to a size limit. _active_command_history is the history
# currently being navigated in, e.g., using the Up/Down keys. The latter
# can be different from the former during prefixed or regex-based history
# navigation, e.g., when user enter the beginning of a command and hit Up.
self._active_command_history = []
# Pointer to the current position in the history sequence.
# 0 means it is a new command being keyed in.
self._command_pointer = 0
self._command_history_limit = 100
self._pending_command = ""
# State related to screen output.
self._output_pad = None
self._curr_unwrapped_output = None
self._curr_wrapped_output = None
# NamedTuple for rectangular locations on screen
self.rectangle = collections.namedtuple("rectangle",
"top left bottom right")
# Register signal handler for SIGINT.
signal.signal(signal.SIGINT, self._interrupt_handler)
def testLoadingCommandHistoryFileObeysLimit(self):
self._cmd_hist.add_command("help 1")
self._cmd_hist.add_command("help 2")
self._cmd_hist.add_command("help 3")
self._cmd_hist.add_command("help 4")
cmd_hist_2 = debugger_cli_common.CommandHistory(limit=3)
self.assertEqual(["help 2", "help 3", "help 4"],
cmd_hist_2.most_recent_n(3))
with open(self._history_file_path, "rt") as f:
self.assertEqual(
["help 2\n", "help 3\n", "help 4\n"], f.readlines())
def __init__(self, on_ui_exit=None):
"""Constructor of CursesUI.
Args:
on_ui_exit: (Callable) Callback invoked when the UI exits.
"""
base_ui.BaseUI.__init__(self, on_ui_exit=on_ui_exit)
self._screen_init()
self._screen_refresh_size()
# TODO(cais): Error out if the size of the screen is too small.
# Initialize some UI component size and locations.
self._init_layout()
self._command_history_store = debugger_cli_common.CommandHistory()
# Active list of command history, used in history navigation.
# _command_handler_registry holds all the history commands the CLI has
# received, up to a size limit. _active_command_history is the history
# currently being navigated in, e.g., using the Up/Down keys. The latter
# can be different from the former during prefixed or regex-based history
# navigation, e.g., when user enter the beginning of a command and hit Up.
self._active_command_history = []
# Pointer to the current position in the history sequence.
# 0 means it is a new command being keyed in.
self._command_pointer = 0
self._command_history_limit = 100
self._pending_command = ""
# State related to screen output.
self._output_pad = None
self._output_pad_row = 0
self._output_array_pointer_indices = None
self._curr_unwrapped_output = None
self._curr_wrapped_output = None
# Register signal handler for SIGINT.
signal.signal(signal.SIGINT, self._interrupt_handler)
self.register_command_handler(
"mouse",
self._mouse_mode_command_handler,
"Get or set the mouse mode of this CLI: (on|off)",
prefix_aliases=["m"])
def setUp(self):
self._cmd_hist = debugger_cli_common.CommandHistory(limit=3)
self._history_file_path = os.path.join(
os.path.expanduser("~"),
debugger_cli_common.CommandHistory._HISTORY_FILE_NAME)
def setUp(self): self._cmd_hist = debugger_cli_common.CommandHistory(limit=3)
def setUp(self):
self._fd, self._history_file_path = tempfile.mkstemp()
self._cmd_hist = debugger_cli_common.CommandHistory(
limit=3, history_file_path=self._history_file_path)
