def read_edits(f):
"""Read the edits from the provided file.
Arguments:
f (file): The file, containing user edits.
Returns:
A `dict` containing the new alias, command and description.
"""
d = dict()
for line in f:
if "=" in line:
# Strip out the edited alias, command and description from the
# file.
entry = [ln.strip() for ln in line.split("=", 1)]
d[entry[0].lower()] = entry[1]
# Check if the edits are valid, if not, cancel execution and print the
# proper error message.
err_message = validate_edits(d)
if err_message:
helpers.exit(err_message)
return d
def remove_tomb(ctx, tomb_name):
"""Removes a tomb from the catacomb.
Arguments:
tomb_name (str): The name of the new tomb.
"""
if is_existing_tomb(ctx, tomb_name):
os.remove(os.path.join(ctx.obj.catacomb_dir, tomb_name))
else:
helpers.exit(errors.TOMB_BURY_UNKNOWN.format(tomb_name))
def update(path, contents):
"""Updates the file at the given path with the provided contents.
Arguments:
contents (str): The file contents.
"""
if not os.path.exists(path):
helpers.exit(errors.FILE_UPDATE_UNKNOWN.format(path))
with open(path, "w") as f:
f.write(json.dumps(contents, indent=constants.INDENT_NUM_SPACES))
def open_tomb(ctx, tomb_name):
"""Opens the specified tomb, granting access to its contents/commands to
the user.
Arguments:
tomb_name (str): The name of the new tomb.
"""
if is_existing_tomb(ctx, tomb_name):
ctx.obj.set_open_tomb(tomb_name)
else:
helpers.exit(errors.TOMB_OPEN_UNKNOWN.format(tomb_name))
def edit(ctx, alias):
"""Edits a command if it's present in the active tomb.
Opens an editor for the user with the details for the specified command,
allowing edits to the alias, command and description.
Arguments:
alias (str): The alias of the command to edit.
"""
if not tomb_handler.is_existing_command(ctx, alias):
helpers.exit(constants.WARN_CMD_NOT_FOUND.format(alias))
editor = os.environ.get("EDITOR", helpers.default_editor())
cmd_info = tomb_handler.get_command(ctx, alias, True)
fname = helpers.random_fname()
# Creates a temporary file with the current command information, allowing
# edits.
with open(fname, "w") as temp_file:
# Append the initial message to the file.
temp_file.write(constants.CMD_EDIT_INIT_MSG.format(
alias, cmd_info[0], cmd_info[1]))
# Open the file within an editor.
call([editor, temp_file.name])
# Reads the changes to the file after the user is done with it.
with open(fname, "r") as temp_file:
edits = read_edits(temp_file)
# Clean up.
os.remove(fname)
# The edited alias already exists in the active tomb.
if edits["alias"] != alias and tomb_handler.is_existing_command(
ctx, edits["alias"]):
update = click.prompt(
constants.CMD_EDIT_OVERWRITE_PROMPT.format(alias))
if update.lower() != "y":
# Abort the action.
helpers.exit(constants.WARN_ACTION_ABORTED)
else:
# We need to remove the old command if we're not overwriting it.
tomb_handler.remove_command(ctx, alias)
elif not tomb_handler.is_existing_command(ctx, edits["alias"]):
# Remember to remove the old command if we're adding a new one.
tomb_handler.remove_command(ctx, alias)
# Update the command.
tomb_handler.add_command(
ctx, edits["command"], edits["alias"], edits["description"])
formatter.print_success(constants.CMD_EDIT_OK)
def format_cmd(alias, cmd, params):
"""Formats a command with user provided parameters, similar to the Python
`format()` method.
Arguments:
cmd (str): The command.
params (tuple): Parameters to be formatted into the command.
Returns:
A `string` representing the newly formatted command.
"""
try:
# In the case of more parameters vs placeholders, we will exhaust what
# we can (in order) and run the command anyway. If nothing can be
# substituted, the formatting will be ignored and the command will be
# run as is.
return cmd.format(*params)
except IndexError:
# Not all the placeholders are provided with a value.
helpers.exit(constants.WARN_FMT_NUM_PARAMS.format(alias, len(params)))
except KeyError:
# Placeholders aren't following the correct syntax.
helpers.exit(constants.WARN_FMT_PLACEHOLDER_SYNTAX)
except ValueError:
# Inconsistent use of placeholders in a command.
helpers.exit(constants.WARN_FMT_PLACEHOLDER_SYNTAX2)
except Exception:
# This shouldn't be reachable, but just in case, we'll report it.
helpers.exit(errors.INVALID_FORMAT_USE_CMD.format(cmd))
def create(path, contents=None):
"""Creates a new file at the given path.
Arguments:
contents (str): The file contents.
"""
if os.path.exists(path):
helpers.exit(errors.FILE_CREATE_OVERWRITE.format(path))
if not contents:
# Allow the creation of an empty file.
contents = ""
with open(path, "w") as f:
f.write(json.dumps(contents, indent=constants.INDENT_NUM_SPACES))
def read(path):
"""Read the file at the given path.
Arguments:
path (str): The path of the file to read.
Returns:
A `dict`, representing the contents of the file, if the file exists.
"""
if not os.path.exists(path):
helpers.exit(errors.FILE_READ_UNKNOWN.format(path))
with open(path, "r") as f:
contents = json.load(f)
return contents
