ci: switch to golangci-lint v2

The configuration was migrated using golangci-lint migrate and when
tweaked manually trying to minimize it.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

Author: kolyshkin

.github/workflows/validate.yml

@@ -33,10 +33,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.x
-      - uses: golangci/golangci-lint-action@v6
+          go-version: 1.24.x
+      - uses: golangci/golangci-lint-action@v7
         with:
-          version: v1.64
+          version: v2.0
 
   codespell:
     runs-on: ubuntu-24.04
@@ -61,10 +61,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22.x
-      - uses: golangci/golangci-lint-action@v6
+          go-version: 1.24.x
+      - uses: golangci/golangci-lint-action@v7
         with:
-          version: v1.64
+          version: v2.0
       - name: test-stubs
         run: make test
 

.golangci.yml

@@ -1,14 +1,15 @@
----
-run:
-  concurrency: 6
-  timeout: 5m
+version: "2"
+
+formatters:
+  enable:
+    - gofumpt
+
 linters:
   enable:
     # - copyloopvar   # Detects places where loop variables are copied. TODO enable for Go 1.22+
     - dupword       # Detects duplicate words.
     - errorlint     # Detects code that may cause problems with Go 1.13 error wrapping.
     - gocritic      # Metalinter; detects bugs, performance, and styling issues.
-    - gofumpt       # Detects whether code was gofumpt-ed.
     - gosec         # Detects security problems.
     - misspell      # Detects commonly misspelled English words in comments.
     - nilerr        # Detects code that returns nil even if it checks that the error is not nil.
@@ -20,16 +21,24 @@ linters:
     - tparallel     # Detects inappropriate usage of t.Parallel().
     - unconvert     # Detects unnecessary type conversions.
     - usetesting    # Reports uses of functions with replacement inside the testing package.
-linters-settings:
-  govet:
-    enable-all: true
-    settings:
-      shadow:
-        strict: true
+  settings:
+    govet:
+      enable-all: true
+      settings:
+        shadow:
+          strict: true
+  exclusions:
+    generated: strict
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - govet
+        text: '^shadow: declaration of "err" shadows declaration'
+
 issues:
   max-issues-per-linter: 0
   max-same-issues: 0
-  exclude-rules:
-    - text: '^shadow: declaration of "err" shadows declaration'
-      linters:
-        - govet