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" The Python provider helper
if exists('s:loaded_pythonx_provider')
finish
endif
let s:loaded_pythonx_provider = 1
let s:job_opts = {'rpc': v:true, 'on_stderr': function('provider#stderr_collector')}
function! provider#pythonx#Require(host) abort
let ver = (a:host.orig_name ==# 'python') ? 2 : 3
" Python host arguments
let prog = (ver == '2' ? provider#python#Prog() : provider#python3#Prog())
let args = [prog, '-c', 'import sys; sys.path.remove(""); import neovim; neovim.start_host()']
" Collect registered Python plugins into args
let python_plugins = remote#host#PluginsForHost(a:host.name)
for plugin in python_plugins
call add(args, plugin.path)
endfor
try
let channel_id = jobstart(args, s:job_opts)
if rpcrequest(channel_id, 'poll') ==# 'ok'
return channel_id
endif
catch
echomsg v:throwpoint
echomsg v:exception
for row in provider#get_stderr(channel_id)
echomsg row
endfor
finally
call provider#clear_stderr(channel_id)
endtry
throw remote#host#LoadErrorForHost(a:host.orig_name,
\ '$NVIM_PYTHON_LOG_FILE')
endfunction
function! provider#pythonx#Detect(major_ver) abort
if a:major_ver == 2
if exists('g:python_host_prog')
return [g:python_host_prog, '']
else
let progs = ['python2', 'python2.7', 'python2.6', 'python']
endif
else
if exists('g:python3_host_prog')
return [g:python3_host_prog, '']
else
let progs = ['python3', 'python3.7', 'python3.6', 'python3.5',
\ 'python3.4', 'python3.3', 'python']
endif
endif
let errors = []
for prog in progs
let [result, err] = s:check_interpreter(prog, a:major_ver)
if result
return [prog, err]
endif
" Accumulate errors in case we don't find
" any suitable Python interpreter.
call add(errors, err)
endfor
" No suitable Python interpreter found.
return ['', 'provider/pythonx: Could not load Python ' . a:major_ver
\ . ":\n" . join(errors, "\n")]
endfunction
function! s:check_interpreter(prog, major_ver) abort
let prog_path = exepath(a:prog)
if prog_path ==# ''
return [0, a:prog . ' not found in search path or not executable.']
endif
let min_version = (a:major_ver == 2) ? '2.6' : '3.3'
" Try to load neovim module, and output Python version.
" Return codes:
" 0 Neovim module can be loaded.
" 2 Neovim module cannot be loaded.
" Otherwise something else went wrong (e.g. 1 or 127).
let prog_ver = system([ a:prog , '-c' ,
\ 'import sys; ' .
\ 'sys.path.remove(""); ' .
\ 'sys.stdout.write(str(sys.version_info[0]) + "." + str(sys.version_info[1])); ' .
\ 'import pkgutil; ' .
\ 'exit(2*int(pkgutil.get_loader("neovim") is None))'
\ ])
if v:shell_error == 2 || v:shell_error == 0
" Check version only for expected return codes.
if prog_ver !~ '^' . a:major_ver
return [0, prog_path . ' is Python ' . prog_ver . ' and cannot provide Python '
\ . a:major_ver . '.']
elseif prog_ver =~ '^' . a:major_ver && prog_ver < min_version
return [0, prog_path . ' is Python ' . prog_ver . ' and cannot provide Python >= '
\ . min_version . '.']
endif
endif
if v:shell_error == 2
return [0, prog_path.' does not have the "neovim" module. :help provider-python']
elseif v:shell_error == 127
" This can happen with pyenv's shims.
return [0, prog_path . ' does not exist: ' . prog_ver]
elseif v:shell_error
return [0, 'Checking ' . prog_path . ' caused an unknown error. '
\ . '(' . v:shell_error . ', output: ' . prog_ver . ')'
\ . ' Report this at https://github.com/neovim/neovim']
endif
return [1, '']
endfunction
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