#1095 Use --stdin-filepath where available for prettier-eslint

autoload/ale/fixers/prettier_eslint.vim

@@ -6,7 +6,6 @@ function! ale#fixers#prettier_eslint#SetOptionDefaults() abort
     call ale#Set('javascript_prettier_eslint_executable', 'prettier-eslint')
     call ale#Set('javascript_prettier_eslint_use_global', 0)
     call ale#Set('javascript_prettier_eslint_options', '')
-    call ale#Set('javascript_prettier_eslint_legacy', 0)
 endfunction
 
 call ale#fixers#prettier_eslint#SetOptionDefaults()
@@ -19,16 +18,43 @@ function! ale#fixers#prettier_eslint#GetExecutable(buffer) abort
 endfunction
 
 function! ale#fixers#prettier_eslint#Fix(buffer) abort
+    let l:executable = ale#fixers#prettier_eslint#GetExecutable(a:buffer)
+
+    let l:command = ale#semver#HasVersion(l:executable)
+    \   ? ''
+    \   : ale#Escape(l:executable) . ' --version'
+
+    return {
+    \   'command': l:command,
+    \   'chain_with': 'ale#fixers#prettier_eslint#ApplyFixForVersion',
+    \}
+endfunction
+
+function! ale#fixers#prettier_eslint#ApplyFixForVersion(buffer, version_output) abort
     let l:options = ale#Var(a:buffer, 'javascript_prettier_eslint_options')
     let l:executable = ale#fixers#prettier_eslint#GetExecutable(a:buffer)
 
-    let l:config = !ale#Var(a:buffer, 'javascript_prettier_eslint_legacy')
+    let l:version = ale#semver#GetVersion(l:executable, a:version_output)
+
+    " 4.2.0 is the first version with --eslint-config-path
+    let l:config = ale#semver#GTE(l:version, [4, 2, 0])
     \   ? ale#handlers#eslint#FindConfig(a:buffer)
     \   : ''
     let l:eslint_config_option = !empty(l:config)
     \   ? ' --eslint-config-path ' . ale#Escape(l:config)
     \   : ''
 
+    " 4.4.0 is the first version with --stdin-filepath
+    if ale#semver#GTE(l:version, [4, 4, 0])
+        return {
+        \   'command': ale#path#BufferCdString(a:buffer)
+        \       . ale#Escape(l:executable)
+        \       . l:eslint_config_option
+        \       . (!empty(l:options) ? ' ' . l:options : '')
+        \       . ' --stdin-filepath %s --stdin',
+        \}
+    endif
+
     return {
     \   'command': ale#Escape(l:executable)
     \       . ' %t'

doc/ale-javascript.txt

@@ -171,11 +171,6 @@ g:ale_javascript_prettier_use_global     *g:ale_javascript_prettier_use_global*
 ===============================================================================
 prettier-eslint                                *ale-javascript-prettier-eslint*
 
-ALE supports `prettier-eslint` >= 4.2.0. Using lower version is not recommended
-because it cannot be configured to use the ESLint configuration file for input
-given via stdin. However ALE could be set up on your own risk with older
-versions with |g:ale_javascript_prettier_eslint_legacy|
-
 g:ale_javascript_prettier_eslint_executable
                                   *g:ale_javascript_prettier_eslint_executable*
                                   *b:ale_javascript_prettier_eslint_executable*
@@ -202,14 +197,6 @@ g:ale_javascript_prettier_eslint_use_global
 
   See |ale-integrations-local-executables|
 
-g:ale_javascript_prettier_eslint_legacy
-                                      *g:ale_javascript_prettier_eslint_legacy*
-                                      *b:ale_javascript_prettier_eslint_legacy*
-  Type: |Number|
-  Default: `0`
-
-  Fallback option for `prettier-eslint` < 4.2.0
-
 
 ===============================================================================
 prettier-standard                            *ale-javascript-prettier-standard*

test/fixers/test_prettier_eslint_fixer.callback.vader

@@ -4,12 +4,10 @@ Before:
   Save g:ale_javascript_prettier_eslint_executable
   Save g:ale_javascript_prettier_eslint_use_global
   Save g:ale_javascript_prettier_eslint_options
-  Save g:ale_javascript_prettier_eslint_legacy
 
   unlet! g:ale_javascript_prettier_eslint_executable
   unlet! g:ale_javascript_prettier_eslint_use_global
   unlet! g:ale_javascript_prettier_eslint_options
-  unlet! g:ale_javascript_prettier_eslint_legacy
 
   call ale#fixers#prettier_eslint#SetOptionDefaults()
 
@@ -19,9 +17,9 @@ After:
   unlet! b:ale_javascript_prettier_eslint_executable
   unlet! b:ale_javascript_prettier_eslint_use_global
   unlet! b:ale_javascript_prettier_eslint_options
-  unlet! b:ale_javascript_prettier_eslint_legacy
 
   call ale#test#RestoreDirectory()
+  call ale#semver#ResetVersionCache()
 
 Execute(The default command should be correct):
   AssertEqual
@@ -32,7 +30,7 @@ Execute(The default command should be correct):
   \     . ' %t'
   \     . ' --write'
   \ },
-  \ ale#fixers#prettier_eslint#Fix(bufnr(''))
+  \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), [])
 
 Execute(Additional options should be used when set):
   let b:ale_javascript_prettier_eslint_options = '--foobar'
@@ -45,9 +43,9 @@ Execute(Additional options should be used when set):
   \     . ' %t'
   \     . ' --foobar --write'
   \ },
-  \ ale#fixers#prettier_eslint#Fix(bufnr(''))
+  \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), [])
 
-Execute(Configuration files should be detected):
+Execute(--eslint-config-path should be set for 4.2.0 and up):
   call ale#test#SetFilename('eslint-test-files/react-app/foo/bar.js')
 
   AssertEqual
@@ -59,11 +57,10 @@ Execute(Configuration files should be detected):
   \     . ' --eslint-config-path ' . ale#Escape(ale#path#Winify(g:dir . '/eslint-test-files/react-app/.eslintrc.js'))
   \     . ' --write'
   \ },
-  \ ale#fixers#prettier_eslint#Fix(bufnr(''))
+  \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), ['4.2.0'])
 
-Execute(Configuration files should be disabled if the legacy option is on):
+Execute(--eslint-config-path shouldn't be used for older versions):
   call ale#test#SetFilename('eslint-test-files/react-app/foo/bar.js')
-  let b:ale_javascript_prettier_eslint_legacy = 1
 
   AssertEqual
   \ {
@@ -73,4 +70,44 @@ Execute(Configuration files should be disabled if the legacy option is on):
   \     . ' %t'
   \     . ' --write'
   \ },
+  \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), [])
+
+Execute(The version check should be correct):
+  AssertEqual
+  \ {
+  \   'chain_with': 'ale#fixers#prettier_eslint#ApplyFixForVersion',
+  \   'command': ale#Escape('prettier-eslint') . ' --version',
+  \ },
   \ ale#fixers#prettier_eslint#Fix(bufnr(''))
+
+Execute(The new --stdin-filepath option should be used when the version is new enough):
+  call ale#test#SetFilename('eslint-test-files/react-app/foo/bar.js')
+
+  AssertEqual
+  \ {
+  \   'command': 'cd ' . ale#Escape(expand('%:p:h')) . ' && '
+  \     . ale#Escape('prettier-eslint')
+  \     . ' --eslint-config-path ' . ale#Escape(ale#path#Winify(g:dir . '/eslint-test-files/react-app/.eslintrc.js'))
+  \     . ' --stdin-filepath %s --stdin',
+  \ },
+  \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), ['4.4.0'])
+
+Execute(The version number should be cached):
+  call ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), ['4.4.0'])
+
+  " The version command should be skipped.
+  AssertEqual
+  \ {
+  \   'chain_with': 'ale#fixers#prettier_eslint#ApplyFixForVersion',
+  \   'command': '',
+  \ },
+  \ ale#fixers#prettier_eslint#Fix(bufnr(''))
+
+  " The newer command should be used.
+  AssertEqual
+  \ {
+  \   'command': 'cd ' . ale#Escape(expand('%:p:h')) . ' && '
+  \     . ale#Escape('prettier-eslint')
+  \     . ' --stdin-filepath %s --stdin',
+  \ },
+  \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), [])