Problem: ruby#Detect() and node#Detect() don't return a [prog, err] pair
which means callers must special-case them.
Solution: align their return signatures with the perl/pythonx providers.
using just 'perl' isn't correct as it may not be the version requested.
ditto for 'cpanm', rather go through 'App::cpanminus' to find the latest
perl version
cpanm cannot look for Perl modules from root directories
without sudo so it creates '~/perl5/' and look for Perl modules in there.
Whether this directory existed before running cpanm or not,
cpanm returns a warning to advice the user to setup local::lib
in order to use modules in '~/perl5/' and exits with error code 0.
Each line in the warning always starts with '!'.
Display this warning to the user.
Continue parsing the version number if the warning can be ignored
because lines that are not prefixed with '!' are valid output.
Fix#11858
cpanm outputs a warning that suggest to use 'sudo' or use local::lib.
cpanm exits with 0 so nvim thinks that the command worked.
cpanm output that starts with "!" is likely an error.
Close#11858
fix#11753close#11781
The virtualenv troubleshooting in the Python provider health checks is
supposed to help the user determine whether running Python from Neovim
(as in `system('python')` or `system(exepath('python'))`) will use the
correct executable when a virtualenv is active. Currently however, it
issues spurious warnings in legitimate setups, and conversely, fails to
warn about potentially problematic ones.
See https://github.com/neovim/neovim/issues/11753#issuecomment-578715584
for a more detailed analysis, but at a high level, this is due to two
things:
- the virtualenv check is part of the Python provider check defined in
`s:check_python`, which uses a roundabout and sometimes erroneous way of
determining the Python executable
- more generally, it shouldn't be part of the provider check at all,
because it's not really related to the Python *provider*, i.e. the
Python executable which can communicate with Neovim via `pynvim`, but to
the Python the user is editing source files for, which typically
shouldn't even have `pynvim` installed
This patch reimplements the virtualenv check and factors it out into its
own separate function, which is however still kept in
`health/provider.vim` alongside the rest of the Python troubleshooting,
since troubleshooting all Python-related stuff in one place is probably
a good idea in order to alleviate any potential confusion (e.g. users
who run only provider checks might be left wondering whether their
virtualenv Python was properly detected if the report only shows their
global Python as the provider used by Neovim).
sys.path.remove("") raises ValueError if the item is missing.
https://docs.python.org/3/library/functions.html#filter:
> filter(function, iterable) is equivalent to the generator expression (item
> for item in iterable if function(item))
fixes#11293
The Python provider was special (via [1]), and would continue to do
checks with `0` being set explicitly even.
This was fixed in #11044 (45447e3b6), ref: #11040.
This extends it to use the same method with all providers.
1: https://github.com/neovim/neovim/pull/8047
This reverts part of ade88fe4c [1].
This is required for `let g:python3_host_prog = 'python'` etc, where it
should get picked up from PATH.
Without this it would show:
```
- INFO: pyenv: Path: /home/user/.pyenv/libexec/pyenv
- INFO: pyenv: Root: /home/user/.pyenv
- INFO: Using: g:python3_host_prog = "python"
- ERROR: "python" was not found.
- INFO: Executable: Not found
- ERROR: Detected pip upgrade failure: Python executable can import "pynvim" but not "neovim": python
- ADVICE:
- Use that Python version to reinstall "pynvim" and optionally "neovim".
pip3 uninstall pynvim neovim
pip3 install pynvim
pip3 install neovim # only if needed by third-party software
```
Note that it additionally causes a weird error
("Detected pip upgrade failure"), due to `s:check_bin` emptying
`python_exe` (because the non-absolute file not being readable), and
`provider#pythonx#DetectByModule('pynvim', a:version)` from 75593e6fce
then just getting the value from the host var again (without actual
checks).
This is implicitly fixed via this patch now (because it is skipped), but
could need some improvement in this regard probably.
With this patch it resolves it (for a virtualenv where pynvim is not
made available intentionally):
```
- INFO: pyenv: Path: /home/daniel/.pyenv/libexec/pyenv
- INFO: pyenv: Root: /home/daniel/.pyenv
- INFO: Using: g:python3_host_prog = "python"
- WARNING: $VIRTUAL_ENV exists but appears to be inactive. This could lead to unexpected results.
- ADVICE:
- If you are using Zsh, see: http://vi.stackexchange.com/a/7654
- INFO: Executable: /home/daniel/.pyenv/shims/tmp-system-deoplete.nvim-f205aF/python
- ERROR: Command error (job=11, exit code 1): `'/home/daniel/.pyenv/shims/tmp-system-deoplete.nvim-f205aF/python' -c 'import sys; sys.path.remove(""); import neovim; print(neovim.__file__)'` (in '/home/daniel/.dotfiles/vim/plugged/deoplete.nvim')
Output: Traceback (most recent call last): File "<string>", line 1, in <module>ModuleNotFoundError: No module named 'neovim'
Stderr: Traceback (most recent call last): File "<string>", line 1, in <module>ModuleNotFoundError: No module named 'neovim'
- INFO: Python version: 3.7.4
- INFO: pynvim version: unable to load neovim Python module
- ERROR: pynvim is not installed.
Error: unable to load neovim Python module
- ADVICE:
- Run in shell: pip3 install pynvim
```
Note: this appears to display the error twice via "Output:" and
"Stderr:".
1: https://github.com/neovim/neovim/pull/8784
The neovim module is available for backwards compatibility. We should
not yet force the use of the pynvim module, since there's no other major
reason to bump the minimum supported Python client module.
Closes#9426
This would need to get `expand`ed to not become empty, and is being
handled by s:check_bin already.
`s:check_bin` will also complain about e.g.
"~/.pyenv/versions/3.6.6/bin/python" not being executable, but that
reflects that the host will fail to start with it.
Fixes#8778
Compare `$VIRTUAL_ENV` to `python_bin`.
This is necessary when `g:python_host_prog` is set to an absolute path,
and looking up `pyname` in `$PATH` yields another result.
Remove "" from sys.path (typically the first entry), which could cause
e.g. "logging" to be added from the current directory.
This gets done already for loading the host in
runtime/autoload/provider/pythonx.vim.
I have `g:python3_host_prog` set to the system Python, where a package
is also installed to provide the "neovim" module.
`:checkhealth provider` however displays a warning for this:
> Your virtualenv is not set up optimally.
This is because /usr/bin/python is not in /home/user/.pyenv.
I think this warning should not get displayed if host_prog_var exists.
It goes back to the initial commit (20447ba09), and is maybe only
missing the `!` there as with the previous commit.
Full output:
```
- INFO: pyenv: /home/user/.pyenv/libexec/pyenv
- INFO: pyenv root: /home/user/.pyenv
- INFO: Using: g:python3_host_prog = "/usr/bin/python"
- WARNING: Your virtualenv is not set up optimally (/usr/bin/python is not in /home/user/.pyenv).
- ADVICE:
- Create a virtualenv specifically for Neovim and use `g:python3_host_prog`. This will avoid the need to install Neovim's Python module in each virtualenv.
- WARNING: $VIRTUAL_ENV exists but appears to be inactive. This could lead to unexpected results.
- ADVICE:
- If you are using Zsh, see: http://vi.stackexchange.com/a/7654
- INFO: Executable: /usr/bin/python
- INFO: Python3 version: 3.6.4
- INFO: python-neovim version: 0.2.1
- OK: Latest python-neovim is installed: 0.2.1
```
`g:loaded_python3_provider` gets set when the autoload file is sourced,
but this might error out, e.g. with deoplete:
[deoplete] Failed to load python3 host. You can try to see what happened by starting nvim with $NVIM_PYTHON_LOG_FILE set and opening the generated log file. Also, the host stderr is available in messages.
[deoplete] function remote#define#FunctionBootstrap[1]..remote#host#Require[10]..provider#pythonx#Require[13]..provider#Poll, line 14
[deoplete] deoplete requires Python3 support("+python3").
[deoplete] deoplete failed to load. Try the :UpdateRemotePlugins command and restart Neovim. See also :checkhealth.
It refers to `:checkhealth` from there explicitly, which would then
(without this patch) say that Python 3 is disabled.
This patch changes the reported info to include that it might have been
disabled due to some error, and keeps on going.
On some versions of macOS, pbcopy doesn't work in tmux <2.6
https://superuser.com/q/231130
Fallback to tmux in that case.
Add a healthcheck for this scenario.
