I broke up with neovim....vim is my best friend now

dot_vim/plugged/ale/ale_linters/python/mypy.vim

@@ -0,0 +1,103 @@
+" Author: Keith Smiley <k@keith.so>, w0rp <devw0rp@gmail.com>
+" Description: mypy support for optional python typechecking
+
+call ale#Set('python_mypy_executable', 'mypy')
+call ale#Set('python_mypy_ignore_invalid_syntax', 0)
+call ale#Set('python_mypy_show_notes', 1)
+call ale#Set('python_mypy_options', '')
+call ale#Set('python_mypy_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('python_mypy_auto_pipenv', 0)
+call ale#Set('python_mypy_auto_poetry', 0)
+
+function! ale_linters#python#mypy#GetExecutable(buffer) abort
+    if (ale#Var(a:buffer, 'python_auto_pipenv') || ale#Var(a:buffer, 'python_mypy_auto_pipenv'))
+    \ && ale#python#PipenvPresent(a:buffer)
+        return 'pipenv'
+    endif
+
+    if (ale#Var(a:buffer, 'python_auto_poetry') || ale#Var(a:buffer, 'python_mypy_auto_poetry'))
+    \ && ale#python#PoetryPresent(a:buffer)
+        return 'poetry'
+    endif
+
+    return ale#python#FindExecutable(a:buffer, 'python_mypy', ['mypy'])
+endfunction
+
+" The directory to change to before running mypy
+function! ale_linters#python#mypy#GetCwd(buffer) abort
+    " If we find a directory with "mypy.ini" in it use that,
+    " else try and find the "python project" root, or failing
+    " that, run from the same folder as the current file
+    for l:path in ale#path#Upwards(expand('#' . a:buffer . ':p:h'))
+        if filereadable(l:path . '/mypy.ini')
+            return l:path
+        endif
+    endfor
+
+    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#mypy#GetCommand(buffer) abort
+    let l:executable = ale_linters#python#mypy#GetExecutable(a:buffer)
+    let l:exec_args = l:executable =~? 'pipenv\|poetry$'
+    \   ? ' run mypy'
+    \   : ''
+
+    return '%e' . l:exec_args
+    \   . ale#Pad(ale#Var(a:buffer, 'python_mypy_options'))
+    \   . ' --show-column-numbers'
+    \   . ' --shadow-file %s %t %s'
+endfunction
+
+function! ale_linters#python#mypy#Handle(buffer, lines) abort
+    let l:dir = ale_linters#python#mypy#GetCwd(a:buffer)
+    " Look for lines like the following:
+    "
+    " file.py:4: error: No library stub file for module 'django.db'
+    "
+    " Lines like these should be ignored below:
+    "
+    " file.py:4: note: (Stub files are from https://github.com/python/typeshed)
+
+    let l:types = 'error|warning'
+
+    if ale#Var(a:buffer, 'python_mypy_show_notes')
+        let l:types = 'error|warning|note'
+    endif
+
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):?(\d+)?: ('
+    \   . l:types
+    \   . '): (.+)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        " Skip invalid syntax errors if the option is on.
+        if l:match[5] is# 'invalid syntax'
+        \&& ale#Var(a:buffer, 'python_mypy_ignore_invalid_syntax')
+            continue
+        endif
+
+        call add(l:output, {
+        \   'filename': ale#path#GetAbsPath(l:dir, l:match[1]),
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
+        \   'type': l:match[4] is# 'error' ? 'E' : (l:match[4] is# 'note' ? 'I': 'W'),
+        \   'text': l:match[5],
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('python', {
+\   'name': 'mypy',
+\   'executable': function('ale_linters#python#mypy#GetExecutable'),
+\   'cwd': function('ale_linters#python#mypy#GetCwd'),
+\   'command': function('ale_linters#python#mypy#GetCommand'),
+\   'callback': 'ale_linters#python#mypy#Handle',
+\   'output_stream': 'both'
+\})