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" Author: Eric Zhao <21zhaoe@protonmail.com>
" Description: Implementation of the Language Server Protocol for R.
call ale#Set('r_languageserver_cmd', 'languageserver::run()')
call ale#Set('r_languageserver_options', {})
function! ale_linters#r#languageserver#GetCommand(buffer) abort
let l:cmd_string = ale#Var(a:buffer, 'r_languageserver_cmd')
return 'Rscript --vanilla -e ' . ale#Escape(l:cmd_string)
endfunction
function! ale_linters#r#languageserver#GetProjectRoot(buffer) abort
let l:project_root = ale#path#FindNearestFile(a:buffer, '.Rprofile')
return !empty(l:project_root) ? fnamemodify(l:project_root, ':h') : fnamemodify(a:buffer, ':h')
endfunction
call ale#linter#Define('r', {
\ 'name': 'languageserver',
\ 'lsp': 'stdio',
\ 'lsp_config': {b -> ale#Var(b, 'r_languageserver_options')},
\ 'executable': 'Rscript',
\ 'command': function('ale_linters#r#languageserver#GetCommand'),
\ 'project_root': function('ale_linters#r#languageserver#GetProjectRoot')
\})
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