chore: update CI and golangci-lint configuration

- Update CI workflow to match gemfile-go setup
- Update golangci-lint to v2 configuration format
- Use Go 1.25 with go-version-file support
- Add comprehensive linting rules

Author: seuros

.github/workflows/ci.yml

@@ -47,18 +47,17 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Setup Go
       uses: actions/setup-go@v6
       with:
-        go-version-file: 'go.mod'
-
-    - name: Install Mage
-      run: go install github.com/magefile/mage@latest
+        go-version: stable
 
-    - name: Run linting
-      run: mage lint
+    - name: golangci-lint
+      uses: golangci/golangci-lint-action@v8
+      with:
+        version: latest
 
   examples:
     name: Validate Examples
@@ -77,4 +76,4 @@ jobs:
       run: go install github.com/magefile/mage@latest
 
     - name: Run examples
-      run: mage examples
+      run: mage examples

.golangci.yml

@@ -1,92 +1,101 @@
+version: "2"
 run:
-  timeout: 5m
   tests: true
-
 linters:
   enable:
     - bodyclose
     - dogsled
     - dupl
-    - errcheck
     - exhaustive
     - funlen
     - gochecknoinits
     - goconst
     - gocritic
     - gocyclo
-    - gofmt
-    - goimports
     - goprintffuncname
     - gosec
-    - gosimple
-    - govet
-    - ineffassign
     - lll
     - misspell
     - nakedret
     - noctx
     - nolintlint
     - rowserrcheck
     - staticcheck
-    - stylecheck
-    - typecheck
     - unconvert
     - unparam
-    - unused
     - whitespace
-
-linters-settings:
-  dupl:
-    threshold: 100
-  exhaustive:
-    default-signifies-exhaustive: false
-  funlen:
-    lines: 100
-    statements: 50
-  goconst:
-    min-len: 2
-    min-occurrences: 2
-  gocritic:
-    enabled-tags:
-      - diagnostic
-      - experimental
-      - opinionated
-      - performance
-      - style
-    disabled-checks:
-      - dupImport
-      - ifElseChain
-      - octalLiteral
-      - whyNoLint
-      - wrapperFunc
-  gocyclo:
-    min-complexity: 15
-  goimports:
-    local-prefixes: github.com/contriboss/gemfile-go
-  govet:
-    enable:
-      - shadow
-  lll:
-    line-length: 140
-  misspell:
-    locale: US
-  nolintlint:
-    allow-leading-space: true
-    allow-unused: false
-    require-explanation: false
-    require-specific: false
-
-issues:
-  exclude-dirs:
-    - vendor
-    - testdata
-  exclude-rules:
-    - path: _test\.go
-      linters:
-        - funlen
-        - dupl
-
-    - path: examples/
-      linters:
-        - goconst
-        - funlen
+  settings:
+    dupl:
+      threshold: 100
+    exhaustive:
+      default-signifies-exhaustive: false
+    funlen:
+      lines: 100
+      statements: 50
+    goconst:
+      min-len: 2
+      min-occurrences: 2
+    gocritic:
+      disabled-checks:
+        - dupImport
+        - ifElseChain
+        - octalLiteral
+        - whyNoLint
+        - wrapperFunc
+      enabled-tags:
+        - diagnostic
+        - experimental
+        - opinionated
+        - performance
+        - style
+    gocyclo:
+      min-complexity: 15
+    govet:
+      enable:
+        - shadow
+    lll:
+      line-length: 140
+    misspell:
+      locale: US
+    nolintlint:
+      require-explanation: false
+      require-specific: false
+      allow-unused: false
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - dupl
+          - funlen
+        path: _test\.go
+      - linters:
+          - funlen
+          - goconst
+        path: examples/
+    paths:
+      - vendor
+      - testdata
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  settings:
+    goimports:
+      local-prefixes:
+        - github.com/contriboss/rubygems-client-go
+  exclusions:
+    generated: lax
+    paths:
+      - vendor
+      - testdata
+      - third_party$
+      - builtin$
+      - examples$

.pre-commit-config.yaml

@@ -21,4 +21,4 @@ repos:
     hooks:
       - id: go-fmt
       - id: go-imports
-      - id: go-mod-tidy
+      - id: go-mod-tidy