ensure jupyter dir is on PATH

[minrk]

before dispatching to subcommands

This addresses the case when jupyter is executed by absolute path and its dir is not on PATH, which would result in all subcommands not being found.

closes jupyter/notebook#448

[bbergman]

Weird that I JUST hit this today when I tried to create an init.d entry for notebook. Thankfully, the workaround works. :)

[EvanZ]

Which dir?

root@5094eba8037a:/# jupyter --paths
config:
/root/.jupyter
/usr/etc/jupyter
/usr/local/etc/jupyter
/etc/jupyter
data:
/root/.local/share/jupyter
/usr/local/share/jupyter
/usr/share/jupyter
runtime:
/root/.local/share/jupyter/runtime

[takluyver]

The directory where the Jupyter command itself is. See dirname $(which jupyter).

[ibrahim5253]

I am on a server (without sudo access) and facing this issue. But ipython notebook works fine. Also, jupyter's dir (/usr/local/bin) is in the PATH variable. What can be done?

[takluyver]

Where is the jupyter-notebook script?

[ibrahim5253]

I doubt there exists any. which jupyter-notebook returns nothing.

[takluyver]

If that doesn't exist, then jupyter notebook won't work. You may be able to install the notebook without sudo access, depending on how the server is configured.

[stevengj]

This still failing for me in Windows 8: when I run \somepath\jupyter.exe notebook it fails with jupyter-notebook not found, but when I add \somepath to the PATH environment variable it works (actually spelled Path, but Windows environment vars should be case-insensitive case-preserving). It also works if I run \somepath\jupyter-notebook.exe directly.

jupyter --version prints 4.4.0.