2022-05-23 00:16:32 +04:00

136 lines
4.9 KiB
Python

"""Contains writer for writing nbconvert output to filesystem."""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import glob
import os
from pathlib import Path
from traitlets import Unicode, observe
from nbconvert.utils.io import ensure_dir_exists, link_or_copy
from .base import WriterBase
class FilesWriter(WriterBase):
"""Consumes nbconvert output and produces files."""
build_directory = Unicode(
"",
help="""Directory to write output(s) to. Defaults
to output to the directory of each notebook. To recover
previous default behaviour (outputting to the current
working directory) use . as the flag value.""",
).tag(config=True)
relpath = Unicode(
help="""When copying files that the notebook depends on, copy them in
relation to this path, such that the destination filename will be
os.path.relpath(filename, relpath). If FilesWriter is operating on a
notebook that already exists elsewhere on disk, then the default will be
the directory containing that notebook."""
).tag(config=True)
# Make sure that the output directory exists.
@observe("build_directory")
def _build_directory_changed(self, change):
new = change["new"]
if new:
ensure_dir_exists(new)
def __init__(self, **kw):
super().__init__(**kw)
self._build_directory_changed({"new": self.build_directory})
def _makedir(self, path):
"""Make a directory if it doesn't already exist"""
if path:
self.log.info("Making directory %s", path)
ensure_dir_exists(path)
def write(self, output, resources, notebook_name=None, **kw):
"""
Consume and write Jinja output to the file system. Output directory
is set via the 'build_directory' variable of this instance (a
configurable).
See base for more...
"""
# Verify that a notebook name is provided.
if notebook_name is None:
raise TypeError("notebook_name")
# Pull the extension and subdir from the resources dict.
output_extension = resources.get("output_extension", None)
# Get the relative path for copying files
resource_path = resources.get("metadata", {}).get("path", "")
relpath = self.relpath or resource_path
build_directory = self.build_directory or resource_path
# Write all of the extracted resources to the destination directory.
# NOTE: WE WRITE EVERYTHING AS-IF IT'S BINARY. THE EXTRACT FIG
# PREPROCESSOR SHOULD HANDLE UNIX/WINDOWS LINE ENDINGS...
items = resources.get("outputs", {}).items()
if items:
self.log.info(
"Support files will be in %s",
os.path.join(resources.get("output_files_dir", ""), ""),
)
for filename, data in items:
# Determine where to write the file to
dest = os.path.join(build_directory, filename)
path = os.path.dirname(dest)
self._makedir(path)
# Write file
self.log.debug("Writing %i bytes to support file %s", len(data), dest)
with open(dest, "wb") as f:
f.write(data)
# Copy referenced files to output directory
if build_directory:
for filename in self.files:
# Copy files that match search pattern
for matching_filename in glob.glob(filename):
# compute the relative path for the filename
if relpath != "":
dest_filename = os.path.relpath(matching_filename, relpath)
else:
dest_filename = matching_filename
# Make sure folder exists.
dest = os.path.join(build_directory, dest_filename)
path = os.path.dirname(dest)
self._makedir(path)
# Copy if destination is different.
if not os.path.normpath(dest) == os.path.normpath(matching_filename):
self.log.info("Copying %s -> %s", matching_filename, dest)
link_or_copy(matching_filename, dest)
# Determine where to write conversion results.
if output_extension is not None:
dest = notebook_name + output_extension
else:
dest = notebook_name
dest = Path(build_directory) / dest
# Write conversion results.
self.log.info("Writing %i bytes to %s", len(output), dest)
if isinstance(output, str):
with open(dest, "w", encoding="utf-8") as f:
f.write(output)
else:
with open(dest, "wb") as f:
f.write(output)
return dest