jupyter2: pdf printing broken for certain paths

[haraldschilly]

steps to reproduce:

1. open terminal in $HOME

mkdir subdir
open subdir/sub-dir.ipynb
# do 1+1 and save the file
jupyter nbconvert --to pdf subdir/sub-dir.ipynb

gives

[NbConvertApp] Writing 15556 bytes to subdir/notebook.tex
Traceback (most recent call last):
  File "/usr/local/bin/jupyter-nbconvert", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.4/dist-packages/jupyter_core/application.py", line 267, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "/usr/local/lib/python3.4/dist-packages/traitlets/config/application.py", line 658, in launch_instance
    app.start()
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/nbconvertapp.py", line 305, in start
    self.convert_notebooks()
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/nbconvertapp.py", line 473, in convert_notebooks
    self.convert_single_notebook(notebook_filename)
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/nbconvertapp.py", line 444, in convert_single_notebook
    output, resources = self.export_single_notebook(notebook_filename, resources, input_buffer=input_buffer)
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/nbconvertapp.py", line 373, in export_single_notebook
    output, resources = self.exporter.from_filename(notebook_filename, resources=resources)
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/exporters/exporter.py", line 171, in from_filename
    return self.from_file(f, resources=resources, **kw)
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/exporters/exporter.py", line 189, in from_file
    return self.from_notebook_node(nbformat.read(file_stream, as_version=4), resources=resources, **kw)
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/exporters/pdf.py", line 173, in from_notebook_node
    tex_file = self.writer.write(latex, resources, notebook_name=notebook_name)
  File "/usr/local/lib/python3.4/dist-packages/nbconvert/writers/files.py", line 126, in write
    with io.open(dest, 'w', encoding='utf-8') as f:
FileNotFoundError: [Errno 2] No such file or directory: 'subdir/notebook.tex'

[haraldschilly]

best upstream issue I found is: jupyter/nbconvert#326 (comment)

hence we should try to add --output-dir <output_dir>

[williamstein]

time: 35 minutes