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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(ver) abort
let host_var = (a:ver == 2) ?
\ 'g:python_host_prog' : 'g:python3_host_prog'
let skip_var = (a: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 [check, err, _] = s:check_interpreter({host_var}, a:ver, skip)
if check
return [{host_var}, err]
endif
return ['', 'provider#pythonx#Detect: could not load Python '.a:ver
\ .' (from '.host_var.'): '.err]
endif
let detect_versions = (a:ver == 2) ?
\ ['2', '2.7', '2.6', '']
\ : ['3', '3.5', '3.4', '3.3', '']
for prog in map(detect_versions, "'python' . v:val")
let [check, err, ver] = s:check_interpreter(prog, a:ver, skip)
if check
let [check, err] = s:check_version(prog, ver, skip)
if check
return [prog, err]
endif
endif
endfor
return ['', 'provider#pythonx#Detect: could not load Python '.a:ver
\ .': '.err]
endfunction
function! s:check_version(prog, ver, skip) abort
if a:skip
return [1, '']
endif
let min_version = (a:ver[0] == 2) ? '2.6' : '3.3'
if a:ver >= min_version
return [1, '']
endif
return [0, 'Python ' . a:ver . ' interpreter is not supported.']
endfunction
function! s:check_interpreter(prog, ver, skip) abort
if !executable(a:prog)
return [0, 'Python'.a:ver.' interpreter is not executable.', '']
endif
if a:skip
return [1, '', '']
endif
" Try to load neovim module, and output Python version.
let ver = system(a:prog . ' -c ' .
\ '''import sys; sys.stdout.write(str(sys.version_info[0]) + '.
\ '"." + str(sys.version_info[1])); '''.
\ (a: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, 'Python'.a:ver.' interpreter ('.a:prog.') has no neovim module installed. See ":help nvim-python".', ver]
endif
return [1, '', ver]
endfunction
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