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" The Python provider helper
if exists('s:loaded_pythonx_provider')
finish
endif
let s:loaded_pythonx_provider = 1
function! provider#pythonx#Detect(major_ver) abort
let host_var = (a:major_ver == 2) ?
\ 'g:python_host_prog' : 'g:python3_host_prog'
let skip_var = (a:major_ver == 2) ?
\ 'g:python_host_skip_check' : 'g:python3_host_skip_check'
let skip = exists(skip_var) ? {skip_var} : 0
if exists(host_var)
" Disable auto detection.
let [result, err] = s:check_interpreter({host_var}, a:major_ver, skip)
if result
return [{host_var}, err]
endif
return ['', 'provider/pythonx: Could not load Python ' . a:major_ver
\ . ' from ' . host_var . ': ' . err]
endif
let prog_suffixes = (a:major_ver == 2) ?
\ ['2', '2.7', '2.6', '']
\ : ['3', '3.5', '3.4', '3.3', '']
let errors = []
for prog in map(prog_suffixes, "'python' . v:val")
let [result, err] = s:check_interpreter(prog, a:major_ver, skip)
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, skip) abort
let prog_path = exepath(a:prog)
if prog_path == ''
return [0, a:prog . ' not found in search path or not executable.']
endif
if a:skip
return [1, '']
endif
" Try to load neovim module, and output Python version.
let prog_ver = system([ a:prog , '-c' ,
\ 'import sys; sys.stdout.write(str(sys.version_info[0]) + '.
\ '"." + str(sys.version_info[1])); '.
\ (a:major_ver == 2
\ ? 'import pkgutil; exit(pkgutil.get_loader("neovim") is None)'
\ : 'import importlib; exit(importlib.find_loader("neovim") is None)')
\ ])
if v:shell_error
return [0, prog_path . ' does have not have the neovim module installed. '
\ . 'See ":help nvim-python".']
endif
let min_version = (a:major_ver == 2) ? '2.6' : '3.3'
if prog_ver =~ '^' . a:major_ver && prog_ver >= min_version
return [1, '']
endif
return [0, prog_path . ' is Python ' . prog_ver . ' and cannot provide Python '
\ . a:major_ver . '.']
endfunction
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