flake: add golang-lint lsp (#2507)

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

.golangci.yaml

@@ -1,53 +1,39 @@
 ---
-run:
-  timeout: 10m
-  build-tags:
-    - ts2019
-
-issues:
-  skip-dirs:
-    - gen
+version: "2"
 linters:
-  enable-all: true
+  default: all
   disable:
-    - revive
-    - lll
-    - gofmt
+    - cyclop
+    - depguard
+    - dupl
+    - exhaustruct
+    - funlen
     - gochecknoglobals
     - gochecknoinits
     - gocognit
-    - funlen
-    - tagliatelle
     - godox
-    - ireturn
-    - execinquery
-    - exhaustruct
-    - nolintlint
-    - musttag # causes issues with imported libs
-    - depguard
-    - exportloopref
-    - tenv
-
-    # We should strive to enable these:
-    - wrapcheck
-    - dupl
-    - makezero
-    - maintidx
-
-    # Limits the methods of an interface to 10. We have more in integration tests
     - interfacebloat
-
-    # We might want to enable this, but it might be a lot of work
-    - cyclop
+    - ireturn
+    - lll
+    - maintidx
+    - makezero
+    - musttag
     - nestif
-    - wsl # might be incompatible with gofumpt
-    - testpackage
+    - nolintlint
     - paralleltest
-
-linters-settings:
+    - revive
+    - tagliatelle
+    - testpackage
+    - wrapcheck
+    - wsl
+  settings:
+    gocritic:
+      disabled-checks:
+        - appendAssign
+        - ifElseChain
+    nlreturn:
+      block-size: 4
     varnamelen:
-    ignore-type-assert-ok: true
-    ignore-map-index-ok: true
       ignore-names:
         - err
         - db
@@ -63,12 +49,31 @@ linters-settings:
         - pr
         - p
         - p2
+      ignore-type-assert-ok: true
+      ignore-map-index-ok: true
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+      - gen
 
-  gocritic:
-    disabled-checks:
-      - appendAssign
-      # TODO(kradalby): Remove this
-      - ifElseChain
-
-  nlreturn:
-    block-size: 4
+formatters:
+  enable:
+    - gci
+    - gofmt
+    - gofumpt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+      - gen

flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1743076231,
-        "narHash": "sha256-yQugdVfi316qUfqzN8JMaA2vixl+45GxNm4oUfXlbgw=",
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6c5963357f3c1c840201eda129a99d455074db04",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
         "type": "github"
       },
       "original": {

flake.nix

@@ -81,6 +81,9 @@
         # golangci-lint = prev.golangci-lint.override {
         #   buildGoModule = buildGo;
         # };
+        # golangci-lint-langserver = prev.golangci-lint.override {
+        #   buildGoModule = buildGo;
+        # };
 
         goreleaser = prev.goreleaser.override {
           buildGoModule = buildGo;
@@ -114,6 +117,7 @@
         buildDeps
         ++ [
           golangci-lint
+          golangci-lint-langserver
           golines
           nodePackages.prettier
           goreleaser