ci: switch to golangci-lint v2

The new configs were initially created by golangci-lint migrate,
then tailored to simplify and minify.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.github/workflows/validate.yml

@@ -27,9 +27,9 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "${{ env.GO_VERSION }}"
-      - uses: golangci/golangci-lint-action@v6
+      - uses: golangci/golangci-lint-action@v7
         with:
-          version: v1.64
+          version: v2.0
       # Extra linters, only checking new code from a pull request.
       - name: lint-extra
         if: github.event_name == 'pull_request'

.golangci-extra.yml

@@ -2,11 +2,20 @@
 # github PRs only (see lint-extra in .github/workflows/validate.yml).
 #
 # For the default linter config, see .golangci.yml. This config should
-# only enable additional linters not enabled in the default config.
+# only enable additional linters and/or linter settings not enabled
+# in the default config.
+version: "2"
 
 linters:
-  disable-all: true
+  default: none
   enable:
     - godot
     - revive
-
+    - staticcheck
+  settings:
+    staticcheck:
+      checks:
+        - all
+        - -QF1008 # https://staticcheck.dev/docs/checks/#QF1008 Omit embedded fields from selector expression.
+  exclusions:
+    generated: strict

.golangci.yml

@@ -1,14 +1,31 @@
 # For documentation, see https://golangci-lint.run/usage/configuration/
+version: "2"
+
+formatters:
+  enable:
+    - gofumpt
+  exclusions:
+    generated: strict
 
 linters:
   enable:
     - errorlint
-    - gofumpt
     - nolintlint
     - unconvert
     - unparam
-
-linters-settings:
-  govet:
-    enable:
-      - nilness
+  settings:
+    govet:
+      enable:
+        - nilness
+    staticcheck:
+      checks:
+        - all
+        - -ST1000 # https://staticcheck.dev/docs/checks/#ST1000 Incorrect or missing package comment.
+        - -ST1003 # https://staticcheck.dev/docs/checks/#ST1003 Poorly chosen identifier.
+        - -ST1005 # https://staticcheck.dev/docs/checks/#ST1005 Incorrectly formatted error string.
+        - -QF1008 # https://staticcheck.dev/docs/checks/#QF1008 Omit embedded fields from selector expression.
+  exclusions:
+    generated: strict
+    presets:
+      - comments
+      - std-error-handling