add pyre lsp linter to python linters

ale_linters/python/pyre.vim

@@ -0,0 +1,29 @@
+" Author: dsifford <dereksifford@gmail.com>
+" Description: A performant type-checker supporting LSP for Python 3 created by Facebook
+
+call ale#Set('python_pyre_executable', 'pyre')
+call ale#Set('python_pyre_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale_linters#python#pyre#GetExecutable(buffer) abort
+    return ale#python#FindExecutable(a:buffer, 'python_pyre', ['pyre'])
+endfunction
+
+function! ale_linters#python#pyre#GetCommand(buffer) abort
+    let l:executable = ale_linters#python#pyre#GetExecutable(a:buffer)
+
+    let l:exec_args = l:executable =~? 'pipenv$'
+    \   ? ' run pyre persistent'
+    \   : ' persistent'
+
+    return ale#Escape(l:executable) . l:exec_args
+endfunction
+
+call ale#linter#Define('python', {
+\   'name': 'pyre',
+\   'lsp': 'stdio',
+\   'executable_callback': 'ale_linters#python#pyre#GetExecutable',
+\   'command_callback': 'ale_linters#python#pyre#GetCommand',
+\   'language': 'python',
+\   'project_root_callback': 'ale#python#FindProjectRoot',
+\   'completion_filter': 'ale#completion#python#CompletionItemFilter',
+\})