mirror of
https://github.com/neovim/neovim.git
synced 2024-12-20 11:15:14 -07:00
114 lines
4.0 KiB
VimL
114 lines
4.0 KiB
VimL
" The Python provider helper
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if exists('s:loaded_pythonx_provider')
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finish
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endif
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let s:loaded_pythonx_provider = 1
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function! provider#pythonx#Require(host) abort
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" Python host arguments
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let prog = provider#python3#Prog()
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let args = [prog, '-c', 'import sys; sys.path = [p for p in sys.path if p != ""]; import neovim; neovim.start_host()']
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" Collect registered Python plugins into args
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let python_plugins = remote#host#PluginsForHost(a:host.name)
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for plugin in python_plugins
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call add(args, plugin.path)
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endfor
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return provider#Poll(args, a:host.orig_name, '$NVIM_PYTHON_LOG_FILE', {'overlapped': v:true})
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endfunction
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function! s:get_python_executable_from_host_var(major_version) abort
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return expand(get(g:, 'python'.(a:major_version == 3 ? '3' : execute("throw 'unsupported'")).'_host_prog', ''), v:true)
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endfunction
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function! s:get_python_candidates(major_version) abort
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return {
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\ 3: ['python3', 'python3.10', 'python3.9', 'python3.8', 'python3.7', 'python']
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\ }[a:major_version]
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endfunction
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" Returns [path_to_python_executable, error_message]
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function! provider#pythonx#Detect(major_version) abort
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return provider#pythonx#DetectByModule('neovim', a:major_version)
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endfunction
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" Returns [path_to_python_executable, error_message]
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function! provider#pythonx#DetectByModule(module, major_version) abort
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let python_exe = s:get_python_executable_from_host_var(a:major_version)
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if !empty(python_exe)
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return [exepath(expand(python_exe, v:true)), '']
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endif
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let candidates = s:get_python_candidates(a:major_version)
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let errors = []
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for exe in candidates
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let [result, error] = provider#pythonx#CheckForModule(exe, a:module, a:major_version)
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if result
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return [exe, error]
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endif
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" Accumulate errors in case we don't find any suitable Python executable.
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call add(errors, error)
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endfor
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" No suitable Python executable found.
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return ['', 'Could not load Python '.a:major_version.":\n".join(errors, "\n")]
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endfunction
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" Returns array: [prog_exitcode, prog_version]
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function! s:import_module(prog, module) abort
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let prog_version = system([a:prog, '-c' , printf(
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\ 'import sys; ' .
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\ 'sys.path = [p for p in sys.path if p != ""]; ' .
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\ 'sys.stdout.write(str(sys.version_info[0]) + "." + str(sys.version_info[1])); ' .
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\ 'import pkgutil; ' .
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\ 'exit(2*int(pkgutil.get_loader("%s") is None))',
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\ a:module)])
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return [v:shell_error, prog_version]
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endfunction
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" Returns array: [was_success, error_message]
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function! provider#pythonx#CheckForModule(prog, module, major_version) abort
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let prog_path = exepath(a:prog)
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if prog_path ==# ''
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return [0, a:prog . ' not found in search path or not executable.']
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endif
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let min_version = '3.7'
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" Try to load module, and output Python version.
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" Exit codes:
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" 0 module can be loaded.
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" 2 module cannot be loaded.
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" Otherwise something else went wrong (e.g. 1 or 127).
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let [prog_exitcode, prog_version] = s:import_module(a:prog, a:module)
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if prog_exitcode == 2 || prog_exitcode == 0
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" Check version only for expected return codes.
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if prog_version !~ '^' . a:major_version
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return [0, prog_path . ' is Python ' . prog_version . ' and cannot provide Python '
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\ . a:major_version . '.']
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elseif prog_version =~ '^' . a:major_version && str2nr(prog_version[2:]) < str2nr(min_version[2:])
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return [0, prog_path . ' is Python ' . prog_version . ' and cannot provide Python >= '
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\ . min_version . '.']
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endif
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endif
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if prog_exitcode == 2
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return [0, prog_path.' does not have the "' . a:module . '" module.']
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elseif prog_exitcode == 127
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" This can happen with pyenv's shims.
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return [0, prog_path . ' does not exist: ' . prog_version]
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elseif prog_exitcode
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return [0, 'Checking ' . prog_path . ' caused an unknown error. '
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\ . '(' . prog_exitcode . ', output: ' . prog_version . ')'
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\ . ' Report this at https://github.com/neovim/neovim']
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endif
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return [1, '']
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endfunction
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