Remove support for golang 1.21

.golangci.yml

@@ -38,7 +38,7 @@ linters:
     - canonicalheader
     - containedctx
     - contextcheck
-    # copyloopvar // go 1.22
+    - copyloopvar
     - cyclop
     - decorder
     # depguard
@@ -51,7 +51,6 @@ linters:
     - errchkjson
     - errname
     - errorlint
-    - exportloopref
     - exhaustive
     # exhaustruct
     - fatcontext
@@ -82,11 +81,12 @@ linters:
     - gosmopolitan
     - govet
     - grouper
+    - iface
     - importas
     - inamedparam
     - ineffassign
     - interfacebloat
-    # intrange // go 1.22
+    - intrange
     - ireturn
     - lll
     # loggercheck
@@ -112,6 +112,7 @@ linters:
     - promlinter
     - protogetter
     - reassign
+    - recvcheck
     - revive
     - rowserrcheck
     - sloglint
@@ -144,6 +145,7 @@ issues:
       linters:
         - cyclop
         - err113
+        - errcheck
         - forcetypeassert
         - funlen
         - gochecknoglobals

CHANGELOG.md

@@ -7,6 +7,10 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+### Removed
+
+- Remove support for golang 1.21 (#52).
+
 ## [0.3.0] - 2024-03-11
 
 ### Changed

gcp/handler_test.go

@@ -22,8 +22,6 @@ func TestHandler(t *testing.T) {
 	t.Parallel()
 
 	for _, testcase := range testcases() {
-		testcase := testcase
-
 		t.Run(testcase.description, func(t *testing.T) {
 			t.Parallel()
 

go.mod

@@ -1,5 +1,5 @@
 module github.com/nil-go/sloth
 
-go 1.21
+go 1.22
 
 retract [v0.1.0, v0.2.0] // wrong trace context key

rate/counter.go

@@ -31,7 +31,7 @@ func fnv32a(str string) uint32 {
 		prime32  = 16777619
 	)
 	hash := uint32(offset32)
-	for i := 0; i < len(str); i++ {
+	for i := range len(str) {
 		hash ^= uint32(str[i])
 		hash *= prime32
 	}

rate/handler_test.go

@@ -75,8 +75,6 @@ level=DEBUG msg=msg g.pos=after
 	}
 
 	for _, testcase := range testcases {
-		testcase := testcase
-
 		t.Run(testcase.description, func(t *testing.T) {
 			t.Parallel()
 
@@ -127,7 +125,7 @@ func TestHandler_race(t *testing.T) {
 	start := make(chan struct{})
 	var waitGroup sync.WaitGroup
 	waitGroup.Add(procs)
-	for i := 0; i < procs; i++ {
+	for range procs {
 		go func() {
 			defer waitGroup.Done()
 

sampling/handler_test.go

@@ -35,8 +35,6 @@ func TestNew_panic(t *testing.T) {
 	}
 
 	for _, testcase := range testcases {
-		testcase := testcase
-
 		t.Run(testcase.description, func(t *testing.T) {
 			t.Parallel()
 
@@ -95,8 +93,6 @@ level=INFO msg=info3
 	}
 
 	for _, testcase := range testcases {
-		testcase := testcase
-
 		t.Run(testcase.description, func(t *testing.T) {
 			t.Parallel()