vscode fortls error

[Lucas-Morais-Freire]

When I install the "Modern Fortran" extension it asks me to install fortls and after I click "install" this popup appears:

Modern Fortran Error starting fortls: Check that fortls is in your PATH or that "fortran.fortls.path" is pointing to a fortls binary.

I have checked and the path is:

C:\Users\lucas\AppData\Roaming\Python\Python311\site-packages\fortls

which seems fine to me. Any possible reasons why its not working?

[gnikit]

For Windows, the autodetection for fortls in Modern Fortran can be spotty, I am working on fixing that.
Regardless, when specifying a path to a binary in Windows it is almost always accompanied from the .exe extension.
pip on Windows installs its binaries under a folder called Scripts, try locating that folder.

An educated guess on how the setting should look like:

"fortran.fortls.path": "C:\\Users\\lucas\\AppData\\Roaming\\Python\\Python311\\Scripts\\fortls.exe"

[rushingfox]

It is really useful! For MACos user it also holds: but we need to specify the executable without the ".exe" extension.

This works for me:
"fortran.fortls.path": "/Users/myusername/Library/Python/3.9/bin/fortls"

I installed fortls on the original python environment instead of anaconda environment.

So one more question: if I installed the fortls on one anaconda env, need I open this anaconda env during all the time I use the
modern fortran?

[gnikit]

Probably that would work. AFAIK if you activate anaconda (or any Python venv in a terminal) and open vscode from within in e.g.

python3 -m venv .venv
source ./.venv/bin/activate
pip install fortls --pre  # install if not installed already
code .

fortls (or the formatters) should be discoverable by the automatic mechanism.