feat(diagnostics): add cmake_lint to go alongside cmake_format (#1067)

* feat(diagnostics): add cmake_lint to go alongside cmake_format

* Use diagnostics on save method

lua/null-ls/builtins/_meta/diagnostics.lua

@@ -31,6 +31,9 @@ return {
   clj_kondo = {
     filetypes = { "clojure" }
   },
+  cmake_lint = {
+    filetypes = { "cmake" }
+  },
   codespell = {
     filetypes = {}
   },

lua/null-ls/builtins/_meta/filetype_map.lua

@@ -44,7 +44,7 @@ return {
     formatting = { "cljstyle", "zprint" }
   },
   cmake = {
-    formatting = { "cmake_format", "gersemi" }
+    formatting = { "cmake_format", "cmake_lint", "gersemi" }
   },
   cpp = {
     diagnostics = { "clang_check", "cppcheck", "cpplint", "gccdiag" },

lua/null-ls/builtins/diagnostics/cmake_lint.lua

@@ -0,0 +1,36 @@
+local h = require("null-ls.helpers")
+local methods = require("null-ls.methods")
+
+return h.make_builtin({
+    name = "cmake_lint",
+    meta = {
+        url = "https://github.com/cheshirekow/cmake_format",
+        description = "Check cmake listfiles for style violations, common mistakes, and anti-patterns.",
+    },
+    method = methods.internal.DIAGNOSTICS_ON_SAVE,
+    filetypes = { "cmake" },
+    generator_opts = {
+        command = "cmake-lint",
+        args = {
+            "$FILENAME",
+        },
+        format = "line",
+        to_stdin = false,
+        from_stderr = true,
+        on_output = h.diagnostics.from_pattern(
+            [[(%d+),(%d+): %[((%w)[%d]+)%] (.+)]],
+            { "row", "col", "code", "severity", "message" },
+            {
+                severities = {
+                    E = h.diagnostics.severities["error"],
+                    W = h.diagnostics.severities["warning"],
+                    C = h.diagnostics.severities["information"],
+                    R = h.diagnostics.severities["information"],
+                    I = h.diagnostics.severities["information"],
+                },
+                offsets = { col = 1 },
+            }
+        ),
+    },
+    factory = h.generator_factory,
+})