npm-groovy-lint: Support stdin; add column number (#901)

Author: mosheavni

lua/lint/linters/npm-groovy-lint.lua

@@ -1,13 +1,52 @@
-local pattern = "^%s+(%d+)%s+[^a-z]+m([a-z]+)[^a-z]+m%s+(.*)%s+(%w+)"
-local groups = { "lnum", "severity", "message", "code" }
 local severity_map = {
-  ["info"] = vim.diagnostic.severity.INFO,
-  ["warning"] = vim.diagnostic.severity.WARN,
-  ["error"] = vim.diagnostic.severity.ERROR,
+  info = vim.diagnostic.severity.INFO,
+  warning = vim.diagnostic.severity.WARN,
+  error = vim.diagnostic.severity.ERROR,
 }
+local bin = "npm-groovy-lint"
 
 return {
-  cmd = "npm-groovy-lint",
-  stdin = false,
-  parser = require("lint.parser").from_pattern(pattern, groups, severity_map, { ["source"] = "npm-groovy-lint" }),
+  cmd = bin,
+  args = { "-o", "json", "-" },
+  stdin = true,
+  ignore_exitcode = true,
+  parser = function(output, _)
+    local diagnostics = {}
+    if output == "" then
+      return diagnostics
+    end
+
+    local ok, decoded = pcall(vim.json.decode, output)
+    if not ok or not decoded or not decoded.files then
+      return diagnostics
+    end
+
+    for _, file_data in pairs(decoded.files) do
+      for _, err in ipairs(file_data.errors or {}) do
+        local lnum = (err.line or 1) - 1
+        local col = 0
+        local end_lnum = nil
+        local end_col = nil
+
+        if err.range then
+          col = err.range.start.character or 0
+          end_lnum = (err.range["end"].line or err.line) - 1
+          end_col = err.range["end"].character
+        end
+
+        table.insert(diagnostics, {
+          source = bin,
+          lnum = lnum,
+          col = col,
+          end_lnum = end_lnum,
+          end_col = end_col,
+          severity = severity_map[err.severity] or vim.diagnostic.severity.WARN,
+          message = err.msg,
+          code = err.rule,
+        })
+      end
+    end
+
+    return diagnostics
+  end,
 }