Add linter for AWS CloudFormation template file

1 files changed, 33 insertions, 0 deletions

diff --git a/ale_linters/cloudformation/cfn_python_lint.vim b/ale_linters/cloudformation/cfn_python_lint.vim
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index 00000000..a401f224
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+++ b/ale_linters/cloudformation/cfn_python_lint.vim
@@ -0,0 +1,33 @@
+" Author: Yasuhiro Kiyota <yasuhiroki.duck@gmail.com>
+" Description: Support cfn-python-lint for AWS Cloudformation template file
+
+function! ale_linters#cloudformation#cfn_python_lint#Handle(buffer, lines) abort
+    " Matches patterns line the following:
+    "
+    " sample.template.yaml:96:7:96:15: [E3012] Property Resources/Sample/Properties/FromPort should be of type Integer
+    let l:pattern = '\v^(.*):(\d+):(\d+):(\d+):(\d+): \[([[:alnum:]]+)\] (.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:code = l:match[6]
+
+        if ale#path#IsBufferPath(a:buffer, l:match[1])
+            call add(l:output, {
+            \   'lnum': l:match[2] + 0,
+            \   'col': l:match[3] + 0,
+            \   'text': l:match[7],
+            \   'code': l:code,
+            \   'type': l:code[:0] is# 'E' ? 'E' : 'W',
+            \})
+        endif
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('cloudformation', {
+\   'name': 'cloudformation',
+\   'executable': 'cfn-lint',
+\   'command': 'cfn-lint --template %t --format parseable',
+\   'callback': 'ale_linters#cloudformation#cfn_python_lint#Handle',
+\})