Add support for 'vulture' for Python

1 files changed, 84 insertions, 0 deletions

diff --git a/ale_linters/python/vulture.vim b/ale_linters/python/vulture.vim
new file mode 100644
index 00000000..bff7d623
--- /dev/null
+++ b/ale_linters/python/vulture.vim
@@ -0,0 +1,84 @@
+" Author: Yauheni Kirylau <actionless.loveless@gmail.com>
+" Description: vulture linting for python files
+
+call ale#Set('python_vulture_executable', 'vulture')
+call ale#Set('python_vulture_options', '')
+call ale#Set('python_vulture_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('python_vulture_change_directory', 1)
+
+
+" The directory to change to before running vulture
+function! s:GetDir(buffer) abort
+    let l:project_root = ale#python#FindProjectRoot(a:buffer)
+
+    return !empty(l:project_root)
+    \   ? l:project_root
+    \   : expand('#' . a:buffer . ':p:h')
+endfunction
+
+
+function! ale_linters#python#vulture#GetExecutable(buffer) abort
+    return ale#python#FindExecutable(a:buffer, 'python_vulture', ['vulture'])
+endfunction
+
+
+function! ale_linters#python#vulture#GetCommand(buffer) abort
+    let l:change_dir = ale#Var(a:buffer, 'python_vulture_change_directory')
+    \   ? ale#path#CdString(s:GetDir(a:buffer))
+    \   : ''
+
+    let l:executable = ale_linters#python#vulture#GetExecutable(a:buffer)
+
+    let l:exec_args = l:executable =~? 'pipenv$'
+    \   ? ' run vulture'
+    \   : ''
+
+    let l:lint_dest = ale#Var(a:buffer, 'python_vulture_change_directory')
+    \   ? ' .'
+    \   : ' %s'
+
+    return l:change_dir
+    \   . ale#Escape(l:executable) . l:exec_args
+    \   . ' '
+    \   . ale#Var(a:buffer, 'python_vulture_options')
+    \   . l:lint_dest
+endfunction
+
+
+function! ale_linters#python#vulture#Handle(buffer, lines) abort
+    for l:line in a:lines[:10]
+        if match(l:line, '^Traceback') >= 0
+            return [{
+            \   'lnum': 1,
+            \   'text': 'An exception was thrown. See :ALEDetail',
+            \   'detail': join(a:lines, "\n"),
+            \}]
+        endif
+    endfor
+
+    " Matches patterns line the following:
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+): (.*)$'
+    let l:output = []
+    let l:dir = s:GetDir(a:buffer)
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:abspath = ale#path#GetAbsPath(l:dir, l:match[1])
+        let l:item = {
+        \   'filename': l:abspath,
+        \   'lnum': l:match[2] + 0,
+        \   'text': l:match[3],
+        \   'type': 'W',
+        \}
+        call add(l:output, l:item)
+    endfor
+
+    return l:output
+endfunction
+
+
+call ale#linter#Define('python', {
+\   'name': 'vulture',
+\   'executable_callback': 'ale_linters#python#vulture#GetExecutable',
+\   'command_callback': 'ale_linters#python#vulture#GetCommand',
+\   'callback': 'ale_linters#python#vulture#Handle',
+\})