Merge pull request #1851 from pmacosta/develop

Added Vim segment plugin for the Asynchronous Linter Engine (ALE)

docs/source/configuration/segments/vim.rst

@@ -9,6 +9,12 @@ Vim segments
 Plugin-specific segments
 ========================
 
+Asynchronous Linter Engine (ALE) segments
+-----------------------------------------
+
+.. automodule:: powerline.segments.vim.plugin.ale
+   :members:
+
 Syntastic segments
 ------------------
 

powerline/segments/vim/plugin/ale.py

@@ -0,0 +1,52 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+try:
+	import vim
+except ImportError:
+	vim = object()
+
+from powerline.bindings.vim import vim_global_exists
+from powerline.theme import requires_segment_info
+
+
+@requires_segment_info
+def ale(segment_info, pl, err_format='ERR: ln {first_line} ({num}) ', warn_format='WARN: ln {first_line} ({num}) '):
+	'''Show whether ALE has found any errors or warnings
+
+	:param str err_format:
+		Format string for errors.
+
+	:param str warn_format:
+		Format string for warnings.
+
+	Highlight groups used: ``ale:warning`` or ``warning``, ``ale:error`` or ``error``.
+	'''
+	if not (vim_global_exists('ale_enabled') and int(vim.eval('g:ale_enabled'))):
+		return None
+	has_errors = int(vim.eval('ale#statusline#Count(' + str(segment_info['bufnr']) + ').total'))
+	if not has_errors:
+		return
+	error = None
+	warning = None
+	errors_count = 0
+	warnings_count = 0
+	for issue in vim.eval('ale#engine#GetLoclist(' + str(segment_info['bufnr']) + ')'):
+		if issue['type'] == 'E':
+			error = error or issue
+			errors_count += 1
+		elif issue['type'] == 'W':
+			warning = warning or issue
+			warnings_count += 1
+	segments = []
+	if error:
+		segments.append({
+			'contents': err_format.format(first_line=error['lnum'], num=errors_count),
+			'highlight_groups': ['ale:error', 'error'],
+		})
+	if warning:
+		segments.append({
+			'contents': warn_format.format(first_line=warning['lnum'], num=warnings_count),
+			'highlight_groups': ['ale:warning', 'warning'],
+		})
+	return segments