Add support for npm-groovy-lint (#4495)

* Add support for npm-groovy-lint

* Add doc and tests for npm-groovy-lint

* Use ale#util#FuzzyJSONDecode instead of json_decode

1 files changed, 46 insertions, 0 deletions

diff --git a/ale_linters/groovy/npmgroovylint.vim b/ale_linters/groovy/npmgroovylint.vim
new file mode 100644
index 00000000..4141bd25
--- /dev/null
+++ b/ale_linters/groovy/npmgroovylint.vim
@@ -0,0 +1,46 @@
+" Author: lucas-str <lucas.sturelle@ik.me>
+" Description: Integration of npm-groovy-lint for Groovy files.
+
+call ale#Set('groovy_npmgroovylint_executable', 'npm-groovy-lint')
+call ale#Set('groovy_npmgroovylint_options', '--loglevel warning')
+
+function! ale_linters#groovy#npmgroovylint#GetCommand(buffer) abort
+    let l:options = ale#Var(a:buffer, 'groovy_npmgroovylint_options')
+
+    return '%e --failon none --output json'
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' %t'
+endfunction
+
+function! ale_linters#groovy#npmgroovylint#Handle(buffer, lines) abort
+    let l:output = []
+    let l:json = ale#util#FuzzyJSONDecode(a:lines, {})
+
+    for [l:filename, l:file] in items(get(l:json, 'files', {}))
+        for l:error in get(l:file, 'errors', [])
+            let l:output_line = {
+            \   'filename': l:filename,
+            \   'lnum': l:error.line,
+            \   'text': l:error.msg,
+            \   'type': toupper(l:error.severity[0]),
+            \}
+
+            if has_key(l:error, 'range')
+                let l:output_line.col = l:error.range.start.character
+                let l:output_line.end_col = l:error.range.end.character
+                let l:output_line.end_lnum = l:error.range.end.line
+            endif
+
+            call add(l:output, l:output_line)
+        endfor
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('groovy', {
+\   'name': 'npm-groovy-lint',
+\   'executable': {b -> ale#Var(b, 'groovy_npmgroovylint_executable')},
+\   'command': function('ale_linters#groovy#npmgroovylint#GetCommand'),
+\   'callback': 'ale_linters#groovy#npmgroovylint#Handle',
+\})