#2132 Remove the need for the hidden add_newline option by tweaking t…

…he flow command

ale_linters/javascript/flow.vim

@@ -54,7 +54,8 @@ function! ale_linters#javascript#flow#GetCommand(buffer, version_lines) abort
     return ale#Escape(l:executable)
     \   . ' check-contents'
     \   . (l:use_respect_pragma ? ' --respect-pragma': '')
-    \   . ' --json --from ale %s'
+    \   . ' --json --from ale %s < %t'
+    \   . (!has('win32') ? '; echo' : '')
 endfunction
 
 " Filter lines of flow output until we find the first line where the JSON
@@ -172,5 +173,5 @@ call ale#linter#Define('javascript', {
 \       {'callback': 'ale_linters#javascript#flow#GetCommand'},
 \   ],
 \   'callback': 'ale_linters#javascript#flow#Handle',
-\   'add_newline': !has('win32'),
+\   'read_buffer': 0,
 \})

autoload/ale/engine.vim

@@ -525,16 +525,6 @@ function! s:RunJob(options) abort
         let l:read_buffer = 0
     endif
 
-    " Add a newline to commands which need it.
-    " This is only used for Flow for now, and is not documented.
-    if l:linter.add_newline
-        if has('win32')
-            let l:command = l:command . '; echo.'
-        else
-            let l:command = l:command . '; echo'
-        endif
-    endif
-
     let l:command = ale#job#PrepareCommand(l:buffer, l:command)
     let l:job_options = {
     \   'mode': 'nl',

autoload/ale/linter.vim

@@ -80,7 +80,6 @@ function! ale#linter#PreProcess(filetype, linter) abort
     endif
 
     let l:obj = {
-    \   'add_newline': get(a:linter, 'add_newline', 0),
     \   'name': get(a:linter, 'name'),
     \   'lsp': get(a:linter, 'lsp', ''),
     \}

test/test_flow_command.vader

@@ -15,7 +15,7 @@ Execute(flow should return a command to run if a .flowconfig file exists):
 
   AssertEqual
   \ ale#Escape('flow')
-  \   . ' check-contents --respect-pragma --json --from ale %s',
+  \   . ' check-contents --respect-pragma --json --from ale %s < %t; echo',
   \ ale_linters#javascript#flow#GetCommand(bufnr('%'), [])
 
 Execute(flow should not use the respect pragma argument if the option is off):
@@ -25,15 +25,15 @@ Execute(flow should not use the respect pragma argument if the option is off):
 
   AssertEqual
   \ ale#Escape('flow')
-  \   . ' check-contents --json --from ale %s',
+  \   . ' check-contents --json --from ale %s < %t; echo',
   \ ale_linters#javascript#flow#GetCommand(bufnr('%'), [])
 
 Execute(flow should should not use --respect-pragma for old versions):
   call ale#test#SetFilename('flow/a/sub/dummy')
 
   AssertEqual
   \ ale#Escape('flow')
-  \   . ' check-contents --json --from ale %s',
+  \   . ' check-contents --json --from ale %s < %t; echo',
   \ ale_linters#javascript#flow#GetCommand(bufnr('%'), [
   \   'Warning: `flow --version` is deprecated in favor of `flow version`',
   \   'Flow, a static type checker for JavaScript, version 0.27.0',

test/test_linter_retrieval.vader

@@ -2,8 +2,8 @@ Before:
   Save g:ale_linters
   Save g:ale_linter_aliases
 
-  let g:testlinter1 = {'name': 'testlinter1', 'executable': 'testlinter1', 'command': 'testlinter1', 'callback': 'testCB1', 'output_stream': 'stdout', 'read_buffer': 1, 'lint_file': 0, 'aliases': [], 'lsp': '', 'add_newline': 0}
-  let g:testlinter2 = {'name': 'testlinter2', 'executable': 'testlinter2', 'command': 'testlinter2', 'callback': 'testCB2', 'output_stream': 'stdout', 'read_buffer': 0, 'lint_file': 1, 'aliases': [], 'lsp': '', 'add_newline': 0}
+  let g:testlinter1 = {'name': 'testlinter1', 'executable': 'testlinter1', 'command': 'testlinter1', 'callback': 'testCB1', 'output_stream': 'stdout', 'read_buffer': 1, 'lint_file': 0, 'aliases': [], 'lsp': ''}
+  let g:testlinter2 = {'name': 'testlinter2', 'executable': 'testlinter2', 'command': 'testlinter2', 'callback': 'testCB2', 'output_stream': 'stdout', 'read_buffer': 0, 'lint_file': 1, 'aliases': [], 'lsp': ''}
   call ale#linter#Reset()
   call ale#linter#PreventLoading('testft')
   call ale#linter#PreventLoading('javascript')
@@ -160,7 +160,7 @@ Execute (Buffer-local overrides for aliases should be used):
 
 Execute (Linters should be loaded from disk appropriately):
   call ale#linter#Reset()
-  AssertEqual [{'name': 'testlinter', 'output_stream': 'stdout', 'executable': 'testlinter', 'command': 'testlinter', 'callback': 'testCB', 'read_buffer': 1, 'lint_file': 0, 'aliases': [], 'lsp': '', 'add_newline': 0}], ale#linter#Get('testft')
+  AssertEqual [{'name': 'testlinter', 'output_stream': 'stdout', 'executable': 'testlinter', 'command': 'testlinter', 'callback': 'testCB', 'read_buffer': 1, 'lint_file': 0, 'aliases': [], 'lsp': ''}], ale#linter#Get('testft')
 
 
 Execute (Linters for later filetypes should replace the former ones):
@@ -178,5 +178,5 @@ Execute (Linters for later filetypes should replace the former ones):
   \})
 
   AssertEqual [
-  \ {'output_stream': 'stdout', 'lint_file': 0, 'read_buffer': 1, 'name': 'eslint', 'executable': 'x', 'lsp': '', 'aliases': [], 'command': 'x', 'callback': 'x', 'add_newline': 0}
+  \ {'output_stream': 'stdout', 'lint_file': 0, 'read_buffer': 1, 'name': 'eslint', 'executable': 'x', 'lsp': '', 'aliases': [], 'command': 'x', 'callback': 'x'}
   \], ale#linter#Get('javascript.typescript')