Merge pull request #1618 from colbydehart/master

[new linter] Add mix linter for elixir

1 files changed, 61 insertions, 0 deletions

diff --git a/ale_linters/elixir/mix.vim b/ale_linters/elixir/mix.vim
new file mode 100644
index 00000000..1a95e37f
--- /dev/null
+++ b/ale_linters/elixir/mix.vim
@@ -0,0 +1,61 @@
+" Author: evnu - https://github.com/evnu
+" Author: colbydehart - https://github.com/colbydehart
+" Description: Mix compile checking for Elixir files
+
+function! ale_linters#elixir#mix#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    "
+    " Error format
+    " ** (CompileError) apps/sim/lib/sim/server.ex:87: undefined function update_in/4
+    "
+    " TODO: Warning format
+    " warning: variable "foobar" does not exist and is being expanded to "foobar()", please use parentheses to remove the ambiguity or change the variable name
+
+    let l:pattern = '\v\(([^\)]+Error)\) ([^:]+):([^:]+): (.+)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:type = 'E'
+        let l:text = l:match[4]
+
+        call add(l:output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': l:match[3] + 0,
+        \   'col': 0,
+        \   'type': l:type,
+        \   'text': l:text,
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+function! ale_linters#elixir#mix#FindProjectRoot(buffer) abort
+    let l:mix_file = ale#path#FindNearestFile(a:buffer, 'mix.exs')
+    if !empty(l:mix_file)
+      return fnamemodify(l:mix_file, ':p:h')
+    endif
+    return '.'
+endfunction
+
+function! ale_linters#elixir#mix#GetCommand(buffer) abort
+    let l:project_root = ale_linters#elixir#mix#FindProjectRoot(a:buffer)
+
+    let l:temp_dir = ale#engine#CreateDirectory(a:buffer)
+
+    let l:mix_build_path = has('win32')
+    \   ? 'set MIX_BUILD_PATH=' . ale#Escape(l:temp_dir) . ' &&'
+    \   : 'MIX_BUILD_PATH=' . ale#Escape(l:temp_dir)
+
+    return ale#path#CdString(l:project_root)
+          \ . l:mix_build_path
+          \ . ' mix compile %s'
+endfunction
+
+call ale#linter#Define('elixir', {
+\   'name': 'mix',
+\   'executable': 'mix',
+\   'command_callback': 'ale_linters#elixir#mix#GetCommand',
+\   'callback': 'ale_linters#elixir#mix#Handle',
+\   'lint_file': 1,
+\})