The ultimate Vim configuration: vimrc
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" Author: Fred Emmott <fe@fb.com>
" Description: Hack support via `hhast lsp`
call ale#Set('hack_hhast_executable', 'vendor/bin/hhast-lint')
function! ale_linters#hack#hhast#GetProjectRoot(buffer) abort
" Find the hack root, then figure out if it's also an HHAST root.
" Don't try to use lint configurations from vendor/foo/bar/hhast-lint.json
let l:hhconfig = ale#path#FindNearestFile(a:buffer, '.hhconfig')
if empty(l:hhconfig)
return ''
endif
let l:root = fnamemodify(l:hhconfig, ':h')
let l:hhast_config = findfile('hhast-lint.json', l:root)
return !empty(l:hhast_config) ? l:root : ''
endfunction
function! ale_linters#hack#hhast#GetExecutable(buffer) abort
let l:root = ale_linters#hack#hhast#GetProjectRoot(a:buffer)
let l:relative = ale#Var(a:buffer, 'hack_hhast_executable')
let l:absolute = findfile(l:relative, l:root)
return !empty(l:absolute) ? l:absolute : ''
endfunction
function! ale_linters#hack#hhast#GetInitializationOptions(buffer) abort
return {'lintMode': 'open-files'}
endfunction
call ale#linter#Define('hack', {
\ 'name': 'hhast',
\ 'lsp': 'stdio',
\ 'executable': function('ale_linters#hack#hhast#GetExecutable'),
\ 'command': '%e --mode lsp --from vim-ale',
\ 'project_root': function('ale_linters#hack#hhast#GetProjectRoot'),
\ 'initialization_options': function('ale_linters#hack#hhast#GetInitializationOptions'),
\})