I really really really want to have debugger integration with my Vim setup and while the plugins for old Vim were a little wacky, the new architecture of NeoVim seems promising, so I decided to give lldb.nvim a go.
It didn't work. This is a (
Step 1: update
Update your neovim to the latest release to avoid fighting issues that have already been solved. At the time of writing, I used:
- nvim 0.1.2 from Homebrew
- OS X 10.10.5
- XCode 7.0
- lldb-340.4.70
Step 2: Diagnose
PyThreadState_get error
If you're on OS X, chances are you have more than one Python version installed and that's where the trouble comes from. If you get this error message>>> import lldb
Fatal Python error: PyThreadState_Get: no current thread
it's most likely because you're trying to import a module that has been linked with a different version of Python. The lldb module comes with the XCode developer tools and was linked with the default system version of Python which lives in (remember this)
/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python
/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/PythonStep 3: Install neovim Python module
The neovim module has probably already been installed with neovim but perhaps not in the correct Python version. You can try to
import neovim in the system Python. If it fails, you'll need to install it using easy_install or pip:sudo /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python -m easy_install neovim
This will install the neovim package into the system Python distribution (needs sudo) using the easy_install tool.
Step 4: Configure neovim to use the system Python
In your neovim config file, add this line:
let g:python_host_prog = '/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python'
This ensures that neovim will start the system Python (which has access to lldb and neovim modules) to host the plugin. After this, you should be all set!
Step 5: Using $PYTHONPATH?
If you do use $PYTHONPATH with your non-system Python, you'll have trouble as well. Before launching the system Python from nvim, you'll need to clean this variable otherwise the packages will interfere with the system Python's packages.
I do that using a small wrapper script
I do that using a small wrapper script
~/syspython2 which gets invoked from nvim as the g:python_host_prog#!/bin/sh
# running the OS X system python. Required to import the lldb module.
export PYTHONPATH="/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python"
# enable these for debugging
#echo "--" >> ~/syspython2.log
#echo "$@" >> ~/syspython2.log
/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python "$@"
Step 6: Diagnose
Still having trouble?
- Don't forget to run
:UpdateRemotePlugins - Enable logging in the
~/syspython2script - Check using
pstree | lessif neovim is launching the correct Python binary - Double-check you can import neovim and lldb modules from the system Python
- Make sure lldb.neovim is installed correctly - the file
lldb.nvim/rplugin/python/lldb_nvim.pymust exist - NeoVim also tries to load Python 3 plugins, you may need to do the same for Python 3
- Try to debug
/usr/local/Cellar/neovim/0.1.2/share/nvim/runtime/autoload/remote/host.vimusing debugging vim methods - More info about lldb Python module here on StackOverflow
Thanks a million trillion times! I was getting suicidal,
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Deletelldb works smooth with the default macOS python (/usr/bin/python). Which is also used in LLDB Python Reference: http://lldb.llvm.org/python-reference.html
ReplyDeleteBut there is a need to install all the dependencies and even pip itself for this version. My workaround was:
1) installing pip with /usr/bin/python using get-pip.py (no luck with easy_install):
download https://bootstrap.pypa.io/get-pip.py
run the downloaded: sudo /usr/bin/python get-pip.py
2) installing the 'six' module (sudo /usr/bin/python -m pip install six)
3) installing neovim, but 'pip install' for each dependency:
sudo /usr/bin/python -m pip install greenlet
sudo /usr/bin/python -m pip install msgpack-python
sudo /usr/bin/python -m pip install futures
sudo /usr/bin/python -m pip install trollius
sudo /usr/bin/python -m pip install neovim
4) adding 'export PYTHONPATH=/Developer/Library/PrivateFrameworks/LLDB.framework/Resources/Python' to my ~/.bash_profile
5) setting nvim's python to /usr/bin/python
let g:python_host_prog = '/usr/bin/python'
But this is clean Python on my system, all the modules that I previously installed is in /System/Library/Frameworks/Python.framework/... so it's not so great.
Sorry, PYTHONPATH should be set as:
DeletePYTHONPATH=/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python
Thanks for your great tutorial. I had problem with addressing python host like this:
ReplyDeletelet g:python_host_prog = '~/syspython2'
This should be:
let g:python_host_prog = '/Users/username/syspython2'
With this configuration it works :)
Thank you. Excited to use lldb in neovim now!
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