mirror of
https://github.com/neovim/neovim.git
synced 2024-12-31 17:13:26 -07:00
109 lines
3.6 KiB
VimL
109 lines
3.6 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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let ver = (a:host.orig_name ==# 'python') ? 2 : 3
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" Python host arguments
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let prog = (ver == '2' ? provider#python#Prog() : provider#python3#Prog())
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let args = [prog, '-c', 'import sys; sys.path.remove(""); 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')
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endfunction
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function! provider#pythonx#Detect(major_ver) abort
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if a:major_ver == 2
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if exists('g:python_host_prog')
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return [expand(g:python_host_prog), '']
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else
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let progs = ['python2', 'python2.7', 'python2.6', 'python']
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endif
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else
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if exists('g:python3_host_prog')
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return [expand(g:python3_host_prog), '']
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else
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let progs = ['python3', 'python3.7', 'python3.6', 'python3.5',
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\ 'python3.4', 'python3.3', 'python']
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endif
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endif
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let errors = []
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for prog in progs
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let [result, err] = provider#pythonx#CheckForModule(prog, 'neovim', a:major_ver)
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if result
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return [prog, err]
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endif
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" Accumulate errors in case we don't find
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" any suitable Python interpreter.
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call add(errors, err)
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endfor
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" No suitable Python interpreter found.
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return ['', 'provider/pythonx: Could not load Python ' . a:major_ver
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\ . ":\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.remove(""); ' .
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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 = (a:major_version == 2) ? '2.6' : '3.3'
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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 && prog_version < min_version
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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. :help provider-python']
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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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