ci: add golangci-lint

.gitattributes

@@ -0,0 +1,2 @@
+*.go -text diff=golang
+*.go text eol=lf

.github/workflows/test.yml

@@ -28,6 +28,12 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
 
+      - name: lint
+        uses: golangci/golangci-lint-action@v7
+        with:
+          version: v2.1
+          args: --print-resources-usage --timeout=10m --verbose
+
       - name: Test
         run: go test -v -cover "-coverprofile=coverage.txt" -covermode=atomic ./...
         shell: bash

.golangci.yml

@@ -0,0 +1,33 @@
+version: "2"
+
+issues:
+  # Disable maximum issues count per one linter.
+  max-issues-per-linter: 0
+  # Disable maximum count of issues with the same text.
+  max-same-issues: 0
+
+linters:
+  enable:
+    - errorlint
+    - unconvert
+    - unparam
+  exclusions:
+    generated: disable
+    presets:
+      - comments
+      - std-error-handling
+  settings:
+    staticcheck:
+      # Enable all options, with some exceptions.
+      # For defaults, see https://golangci-lint.run/usage/linters/#staticcheck
+      checks:
+        - all
+        - -QF1008     # Omit embedded fields from selector expression; https://staticcheck.dev/docs/checks/#QF1008
+        - -ST1003     # Poorly chosen identifier; https://staticcheck.dev/docs/checks/#ST1003
+
+formatters:
+  enable:
+    - gofumpt
+    - goimports
+  exclusions:
+    generated: disable