From 43653ef54816e5219de56cf57073a93b4ce957b8 Mon Sep 17 00:00:00 2001
From: Carlos Ramos <carakan@gmail.com>
Date: Fri, 20 Oct 2017 17:13:25 -0400
Subject: [PATCH] new fixer elixir mix format (only available in elixir > 1.6)

---
 autoload/ale/fix/registry.vim                |  5 +++++
 autoload/ale/fixers/mix_format.vim           | 17 +++++++++++++++++
 autoload/ale/handlers/elixir.vim             |  5 +++++
 test/elixir-test-files/testfile.ex           |  0
 test/fixers/test_elixir_fixer_callback.vader | 16 ++++++++++++++++
 5 files changed, 43 insertions(+)
 create mode 100644 autoload/ale/fixers/mix_format.vim
 create mode 100644 autoload/ale/handlers/elixir.vim
 create mode 100644 test/elixir-test-files/testfile.ex
 create mode 100644 test/fixers/test_elixir_fixer_callback.vader

diff --git a/autoload/ale/fix/registry.vim b/autoload/ale/fix/registry.vim
index d26c71ab..598be6d0 100644
--- a/autoload/ale/fix/registry.vim
+++ b/autoload/ale/fix/registry.vim
@@ -27,6 +27,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['javascript', 'typescript'],
 \       'description': 'Apply eslint --fix to a file.',
 \   },
+\   'mix_format': {
+\       'function': 'ale#fixers#mix_format#Fix',
+\       'suggested_filetypes': ['elixir'],
+\       'description': 'Apply mix format to a file.',
+\   },
 \   'format': {
 \       'function': 'ale#fixers#format#Fix',
 \       'suggested_filetypes': ['elm'],
diff --git a/autoload/ale/fixers/mix_format.vim b/autoload/ale/fixers/mix_format.vim
new file mode 100644
index 00000000..905a6089
--- /dev/null
+++ b/autoload/ale/fixers/mix_format.vim
@@ -0,0 +1,17 @@
+" Author: carakan <carakan@gmail.com>
+" Description: Fixing files with elixir formatter 'mix format'.
+
+call ale#Set('elixir_mix_executable', 'mix')
+
+function! ale#fixers#mix_format#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'elixir_mix_executable')
+endfunction
+
+function! ale#fixers#mix_format#Fix(buffer) abort
+    return {
+    \   'command': ale#handlers#elixir#GetExecutable(a:buffer)
+    \       . ale#fixers#mix_format#GetExecutable(a:buffer)
+    \       . ' format %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction
diff --git a/autoload/ale/handlers/elixir.vim b/autoload/ale/handlers/elixir.vim
new file mode 100644
index 00000000..be25d331
--- /dev/null
+++ b/autoload/ale/handlers/elixir.vim
@@ -0,0 +1,5 @@
+call ale#Set('elixir_executable', '')
+
+function! ale#handlers#elixir#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'elixir_executable')
+endfunction
diff --git a/test/elixir-test-files/testfile.ex b/test/elixir-test-files/testfile.ex
new file mode 100644
index 00000000..e69de29b
diff --git a/test/fixers/test_elixir_fixer_callback.vader b/test/fixers/test_elixir_fixer_callback.vader
new file mode 100644
index 00000000..ff4786e7
--- /dev/null
+++ b/test/fixers/test_elixir_fixer_callback.vader
@@ -0,0 +1,16 @@
+Before:
+  call ale#test#SetDirectory('/testplugin/test/fixers')
+
+After:
+  call ale#test#RestoreDirectory()
+
+Execute(The executable path should be correct):
+  call ale#test#SetFilename('../elixir-test-files/testfile.ex')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command': 'mix format'
+  \     . ' %t',
+  \ },
+  \ ale#fixers#elixir#Fix(bufnr(''))