1 files changed, 86 insertions, 0 deletions
diff --git a/ale_linters/python/pycln.vim b/ale_linters/python/pycln.vim
new file mode 100644
index 00000000..917a9757
--- /dev/null
+++ b/ale_linters/python/pycln.vim
@@ -0,0 +1,86 @@
+" Author: Yining <zhang.yining@gmail.com>
+" Description: pycln as linter for python files
+
+call ale#Set('python_pycln_executable', 'pycln')
+call ale#Set('python_pycln_options', '')
+call ale#Set('python_pycln_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('python_pycln_change_directory', 1)
+call ale#Set('python_pycln_auto_pipenv', 0)
+call ale#Set('python_pycln_auto_poetry', 0)
+call ale#Set('python_pycln_config_file', '')
+
+function! ale_linters#python#pycln#GetExecutable(buffer) abort
+    if (ale#Var(a:buffer, 'python_auto_pipenv') || ale#Var(a:buffer, 'python_pycln_auto_pipenv'))
+    \ && ale#python#PipenvPresent(a:buffer)
+        return 'pipenv'
+    endif
+
+    if (ale#Var(a:buffer, 'python_auto_poetry') || ale#Var(a:buffer, 'python_pycln_auto_poetry'))
+    \ && ale#python#PoetryPresent(a:buffer)
+        return 'poetry'
+    endif
+
+    return ale#python#FindExecutable(a:buffer, 'python_pycln', ['pycln'])
+endfunction
+
+function! ale_linters#python#pycln#GetCwd(buffer) abort
+    if ale#Var(a:buffer, 'python_pycln_change_directory')
+        " Run from project root if found, else from buffer dir.
+        let l:project_root = ale#python#FindProjectRoot(a:buffer)
+
+        return !empty(l:project_root) ? l:project_root : '%s:h'
+    endif
+
+    return ''
+endfunction
+
+function! ale_linters#python#pycln#GetCommand(buffer, version) abort
+    let l:executable = ale_linters#python#pycln#GetExecutable(a:buffer)
+    let l:exec_args = l:executable =~? 'pipenv\|poetry$'
+    \   ? ' run pycln'
+    \   : ''
+
+    let l:options = ale#Var(a:buffer, 'python_pycln_options')
+    let l:config_file = ale#Var(a:buffer, 'python_pycln_config_file')
+    let l:config_file = l:options !~# '\v(^| )--config ' && !empty(l:config_file)
+    \   ? ale#Escape(ale#path#Simplify(l:config_file))
+    \   : ''
+
+    " NOTE: pycln version `1.3.0` supports liniting input from stdin
+    return ale#Escape(l:executable) . l:exec_args
+    \   . ale#Pad(ale#Var(a:buffer, 'python_pycln_options'))
+    \   . (empty(l:config_file) ? '' : ' --config ' . l:config_file)
+    \   . ' --check'
+    \   . (ale#semver#GTE(a:version, [1, 3, 0]) ? ' -' : ' %s')
+endfunction
+
+function! ale_linters#python#pycln#Handle(buffer, lines) abort
+    " Example: tmp/test.py:3:0 'import os' would be removed!
+    let l:pattern = '\v^[a-zA-Z]?:?[^:]+:(\d+):(\d+):? (.+)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 0,
+        \   'text': l:match[3],
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('python', {
+\   'name': 'pycln',
+\   'executable': function('ale_linters#python#pycln#GetExecutable'),
+\   'cwd': function('ale_linters#python#pycln#GetCwd'),
+\   'command': {buffer -> ale#semver#RunWithVersionCheck(
+\       buffer,
+\       ale_linters#python#pycln#GetExecutable(buffer),
+\       '%e --version',
+\       function('ale_linters#python#pycln#GetCommand'),
+\   )},
+\   'callback': 'ale_linters#python#pycln#Handle',
+\   'output_stream': 'both',
+\   'read_buffer': 1,
+\})