migrate to golangci-lint v2 (#13109)

* migrate to golangci-lint v2
* copyloopvar

.github/workflows/test.yaml

@@ -226,12 +226,9 @@ jobs:
         if: always()
         run: go test -count=1 -benchtime=1x ./...
 
-      # TODO(bmizerany): replace this heavy tool with just the
-      # tools/checks/binaries we want and then make them all run in parallel
-      # across jobs, not on a single tiny vm on Github Actions.
-      - uses: golangci/golangci-lint-action@v6
+      - uses: golangci/golangci-lint-action@v9
         with:
-          args: --timeout 10m0s -v
+          only-new-issues: true
 
   patches:
     runs-on: ubuntu-latest

.golangci.yaml

-run:
-  timeout: 5m
+version: "2"
 linters:
+  default: none
   enable:
     - asasalint
     - bidichk
     - bodyclose
     - containedctx
+    - copyloopvar
+    - errcheck
+    - errorlint
+    - exptostd
     - gocheckcompilerdirectives
-    - gofmt
-    - gofumpt
-    - gosimple
+    - gocritic
     - govet
     - ineffassign
     - intrange
     - makezero
     - misspell
+    - modernize
     - nilerr
+    - nilnil
     - nolintlint
     - nosprintfhostport
+    - perfsprint
+    - prealloc
+    - sloglint
     - staticcheck
     - unconvert
+    - unused
+    - usestdlibvars
     - usetesting
     - wastedassign
     - whitespace
-  disable:
-    - usestdlibvars
-    - errcheck
-linters-settings:
+  settings:
+    errcheck:
+      exclude-functions:
+        - fmt.Fprintf
+    perfsprint:
+      strconcat: false
+      concat-loop: false
     staticcheck:
       checks:
         - all
-      - -SA1019 # omit Deprecated check
-severity:
-  default-severity: error
-  rules:
-    - linters:
+        # Using a deprecated function, variable, constant or field.
+        # https://staticcheck.dev/docs/checks/#SA1019
+        - -SA1019
+        # Incorrect or missing package comment.
+        # https://staticcheck.dev/docs/checks/#ST1000
+        - -ST1000
+        # Poorly chosen identifier.
+        # https://staticcheck.dev/docs/checks/#ST1003
+        - -ST1003
+        # The documentation of an exported function should start with the function's name.
+        # https://staticcheck.dev/docs/checks/#ST1020
+        - -ST1020
+        # The documentation of an exported type should start with type's name.
+        # https://staticcheck.dev/docs/checks/#ST1021
+        - -ST1021
+        # The documentation of an exported variable or constant should start with variable's name.
+        # https://staticcheck.dev/docs/checks/#ST1022
+        - -ST1022
+    usestdlibvars:
+      http-method: false
+      http-status-code: false
+
+formatters:
+  enable:
+    - gci
     - gofmt
-        - goimports
-        - intrange
-      severity: info
+    - gofumpt
+  settings:
+    gci:
+      sections:
+        - standard
+        - default
+        - localmodule

fs/ggml/gguf.go

@@ -305,7 +305,7 @@ func readGGUFV1StringsData(llm *gguf, r io.Reader, a *array[string]) (any, error
 
 			a.values[i] = e
 		} else {
-			discardGGUFString(llm, r)
+			_ = discardGGUFString(llm, r)
 		}
 	}
 
@@ -568,7 +568,6 @@ func WriteGGUF(f *os.File, kv KV, ts []*Tensor) error {
 	g.SetLimit(runtime.GOMAXPROCS(0))
 	// TODO consider reducing if tensors size * gomaxprocs is larger than free memory
 	for _, t := range ts {
-		t := t
 		w := io.NewOffsetWriter(f, offset+int64(t.Offset))
 		g.Go(func() error {
 			_, err := t.WriteTo(w)

go.mod

@@ -17,7 +17,6 @@ require (
 	github.com/x448/float16 v0.8.4
 	golang.org/x/sync v0.12.0
 	golang.org/x/sys v0.36.0
-
 )
 
 require (

ml/backend/ggml/ggml.go

@@ -499,7 +499,6 @@ func (b *Backend) Load(ctx context.Context, progress func(float32)) error {
 	g, ctx := errgroup.WithContext(ctx)
 	g.SetLimit(runtime.GOMAXPROCS(0))
 	for _, t := range b.meta.Tensors().Items() {
-		t := t
 		g.Go(func() error {
 			tts := make([]*C.struct_ggml_tensor, max(1, len(b.tensorLoadTargets[t.Name])))
 			for i := range tts {

server/quantization.go

@@ -175,7 +175,6 @@ func quantize(in, out *os.File, orig *fsggml.GGML, newFileType fsggml.FileType,
 	origTensors := orig.Tensors().Items()
 	outputTensors := make([]*fsggml.Tensor, len(origTensors))
 	for i, tensor := range origTensors {
-		tensor := tensor
 		newType := newType(tensor, kv, qs, newFileType)
 		newTensor := &fsggml.Tensor{
 			Name:  tensor.Name,

template/template_test.go

@@ -219,7 +219,6 @@ func TestParse(t *testing.T) {
 	}
 
 	for _, tt := range validCases {
-		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()