chore: modernize Go code

caddy/admin_test.go

@@ -112,9 +112,9 @@ func TestAutoScaleWorkerThreads(t *testing.T) {
 	amountOfThreads := len(getDebugState(t, tester).ThreadDebugStates)
 
 	// try to spawn the additional threads by spamming the server
-	for tries := 0; tries < maxTries; tries++ {
+	for range maxTries {
 		wg.Add(requestsPerTry)
-		for i := 0; i < requestsPerTry; i++ {
+		for range requestsPerTry {
 			go func() {
 				tester.AssertGetResponse(endpoint, http.StatusOK, "slept for 2 ms and worked for 1000 iterations")
 				wg.Done()
@@ -164,9 +164,9 @@ func TestAutoScaleRegularThreadsOnAutomaticThreadLimit(t *testing.T) {
 	amountOfThreads := len(getDebugState(t, tester).ThreadDebugStates)
 
 	// try to spawn the additional threads by spamming the server
-	for tries := 0; tries < maxTries; tries++ {
+	for range maxTries {
 		wg.Add(requestsPerTry)
-		for i := 0; i < requestsPerTry; i++ {
+		for range requestsPerTry {
 			go func() {
 				tester.AssertGetResponse(endpoint, http.StatusOK, "slept for 2 ms and worked for 1000 iterations")
 				wg.Done()

caddy/app.go

@@ -267,7 +267,7 @@ func (f *FrankenPHPApp) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 	return nil
 }
 
-func parseGlobalOption(d *caddyfile.Dispenser, _ interface{}) (interface{}, error) {
+func parseGlobalOption(d *caddyfile.Dispenser, _ any) (any, error) {
 	app := &FrankenPHPApp{}
 	if err := app.UnmarshalCaddyfile(d); err != nil {
 		return nil, err

caddy/caddy_test.go

@@ -42,7 +42,7 @@ func TestPHP(t *testing.T) {
 		}
 		`, "caddyfile")
 
-	for i := 0; i < 100; i++ {
+	for i := range 100 {
 		wg.Add(1)
 
 		go func(i int) {
@@ -105,7 +105,7 @@ func TestWorker(t *testing.T) {
 		}
 		`, "caddyfile")
 
-	for i := 0; i < 100; i++ {
+	for i := range 100 {
 		wg.Add(1)
 
 		go func(i int) {
@@ -157,7 +157,7 @@ func TestGlobalAndModuleWorker(t *testing.T) {
 		}
 		`, "caddyfile")
 
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 
 		go func(i int) {
@@ -209,7 +209,7 @@ func TestNamedModuleWorkers(t *testing.T) {
 		}
 		`, "caddyfile")
 
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 
 		go func(i int) {
@@ -456,7 +456,7 @@ func TestMetrics(t *testing.T) {
 	`, "caddyfile")
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/index.php?i=%d", i), http.StatusOK, fmt.Sprintf("I am by birth a Genevese (%d)", i))
@@ -529,7 +529,7 @@ func TestWorkerMetrics(t *testing.T) {
 	workerName, _ := fastabs.FastAbs("../testdata/index.php")
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/index.php?i=%d", i), http.StatusOK, fmt.Sprintf("I am by birth a Genevese (%d)", i))
@@ -621,7 +621,7 @@ func TestNamedWorkerMetrics(t *testing.T) {
 	`, "caddyfile")
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/index.php?i=%d", i), http.StatusOK, fmt.Sprintf("I am by birth a Genevese (%d)", i))
@@ -712,7 +712,7 @@ func TestAutoWorkerConfig(t *testing.T) {
 	workerName, _ := fastabs.FastAbs("../testdata/index.php")
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/index.php?i=%d", i), http.StatusOK, fmt.Sprintf("I am by birth a Genevese (%d)", i))
@@ -872,7 +872,7 @@ func TestPHPIniBlockConfiguration(t *testing.T) {
 
 func testSingleIniConfiguration(tester *caddytest.Tester, key string, value string) {
 	// test twice to ensure the ini setting is not lost
-	for i := 0; i < 2; i++ {
+	for range 2 {
 		tester.AssertGetResponse(
 			"http://localhost:"+testPort+"/ini.php?key="+key,
 			http.StatusOK,
@@ -940,7 +940,7 @@ func TestMaxWaitTime(t *testing.T) {
 	wg := sync.WaitGroup{}
 	success := atomic.Bool{}
 	wg.Add(10)
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		go func() {
 			statusCode := getStatusCode("http://localhost:"+testPort+"/sleep.php?sleep=10", t)
 			if statusCode == http.StatusGatewayTimeout {
@@ -987,7 +987,7 @@ func TestMaxWaitTimeWorker(t *testing.T) {
 	wg := sync.WaitGroup{}
 	success := atomic.Bool{}
 	wg.Add(10)
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		go func() {
 			statusCode := getStatusCode("http://localhost:"+testPort+"/sleep.php?sleep=10000&iteration=1", t)
 			if statusCode == http.StatusGatewayTimeout {
@@ -1074,7 +1074,7 @@ func TestMultiWorkersMetrics(t *testing.T) {
 	`, "caddyfile")
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/index.php?i=%d", i), http.StatusOK, fmt.Sprintf("I am by birth a Genevese (%d)", i))
@@ -1180,7 +1180,7 @@ func TestDisabledMetrics(t *testing.T) {
 	`, "caddyfile")
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/index.php?i=%d", i), http.StatusOK, fmt.Sprintf("I am by birth a Genevese (%d)", i))
@@ -1285,7 +1285,7 @@ func TestWorkerRestart(t *testing.T) {
 		))
 
 	// Make some requests
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		wg.Add(1)
 		go func(i int) {
 			tester.AssertGetResponse(fmt.Sprintf("http://localhost:"+testPort+"/worker-restart.php?i=%d", i), http.StatusOK, fmt.Sprintf("Counter (%d)", i))

caddy/module.go

@@ -6,6 +6,7 @@ import (
 	"log/slog"
 	"net/http"
 	"path/filepath"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -450,12 +451,8 @@ func parsePhpServer(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error)
 				tryPolicy = ""
 			}
 
-			for _, tf := range tryFiles {
-				if tf == dirIndex {
-					dirRedir = true
-
-					break
-				}
+			if slices.Contains(tryFiles, dirIndex) {
+				dirRedir = true
 			}
 		}
 

context.go

@@ -29,7 +29,7 @@ type frankenPHPContext struct {
 
 	responseWriter http.ResponseWriter
 
-	done      chan interface{}
+	done      chan any
 	startedAt time.Time
 }
 
@@ -42,7 +42,7 @@ func fromContext(ctx context.Context) (fctx *frankenPHPContext, ok bool) {
 // NewRequestWithContext creates a new FrankenPHP request context.
 func NewRequestWithContext(r *http.Request, opts ...RequestOption) (*http.Request, error) {
 	fc := &frankenPHPContext{
-		done:      make(chan interface{}),
+		done:      make(chan any),
 		startedAt: time.Now(),
 		request:   r,
 	}

frankenphp_test.go

@@ -522,7 +522,7 @@ func testFlush(t *testing.T, opts *testOptions) {
 			if j == 0 {
 				assert.Equal(t, []byte("He"), buf)
 			} else {
-				assert.Equal(t, []byte(fmt.Sprintf("llo %d", i)), buf)
+				assert.Equal(t, fmt.Appendf(nil, "llo %d", i), buf)
 			}
 
 			j++
@@ -663,7 +663,7 @@ func TestEnvIsNotResetInWorkerMode(t *testing.T) {
 // reproduction of https://github.com/php/frankenphp/issues/1061
 func TestModificationsToEnvPersistAcrossRequests(t *testing.T) {
 	runTest(t, func(handler func(http.ResponseWriter, *http.Request), _ *httptest.Server, i int) {
-		for j := 0; j < 3; j++ {
+		for range 3 {
 			result, _ := testGet("http://example.com/env/overwrite-env.php", handler, t)
 			assert.Equal(t, "custom_value", result, "a var directly added to $_ENV should persist")
 		}
@@ -780,8 +780,7 @@ func BenchmarkHelloWorld(b *testing.B) {
 	req := httptest.NewRequest("GET", "http://example.com/index.php", nil)
 	w := httptest.NewRecorder()
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		handler(w, req)
 	}
 }
@@ -846,8 +845,7 @@ func BenchmarkEcho(b *testing.B) {
 	req := httptest.NewRequest("POST", "http://example.com/echo.php", r)
 	w := httptest.NewRecorder()
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		r.Reset(body)
 		handler(w, req)
 	}
@@ -917,8 +915,7 @@ func BenchmarkServerSuperGlobal(b *testing.B) {
 	req := httptest.NewRequest("GET", "http://example.com/server-variable.php", nil)
 	w := httptest.NewRecorder()
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		handler(w, req)
 	}
 }

internal/extgen/classparser.go

@@ -306,8 +306,8 @@ func (cp *classParser) parseMethodSignature(className, signature string) (*phpCl
 
 	var params []phpParameter
 	if paramsStr != "" {
-		paramParts := strings.Split(paramsStr, ",")
-		for _, part := range paramParts {
+		paramParts := strings.SplitSeq(paramsStr, ",")
+		for part := range paramParts {
 			param, err := cp.parseMethodParameter(strings.TrimSpace(part))
 			if err != nil {
 				return nil, fmt.Errorf("parsing parameter '%s': %w", part, err)

internal/extgen/docs_test.go

@@ -378,8 +378,7 @@ func BenchmarkDocumentationGenerator_GenerateMarkdown(b *testing.B) {
 		generator: generator,
 	}
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_, err := docGen.generateMarkdown()
 		assert.NoError(b, err)
 	}

internal/extgen/funcparser.go

@@ -128,8 +128,8 @@ func (fp *FuncParser) parseSignature(signature string) (*phpFunction, error) {
 
 	var params []phpParameter
 	if paramsStr != "" {
-		paramParts := strings.Split(paramsStr, ",")
-		for _, part := range paramParts {
+		paramParts := strings.SplitSeq(paramsStr, ",")
+		for part := range paramParts {
 			param, err := fp.parseParameter(strings.TrimSpace(part))
 			if err != nil {
 				return nil, fmt.Errorf("parsing parameter '%s': %w", part, err)

internal/extgen/srcanalyzer_test.go

@@ -371,8 +371,7 @@ func internalTwo() {
 
 	analyzer := &SourceAnalyzer{}
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_, _, err := analyzer.analyze(filename)
 		require.NoError(b, err)
 	}
@@ -391,8 +390,7 @@ func test3() {
 
 	analyzer := &SourceAnalyzer{}
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		analyzer.extractInternalFunctions(content)
 	}
 }

internal/extgen/utils_test.go

@@ -234,7 +234,7 @@ func BenchmarkSanitizePackageName(b *testing.B) {
 
 	for _, tc := range testCases {
 		b.Run(tc, func(b *testing.B) {
-			for i := 0; i < b.N; i++ {
+			for b.Loop() {
 				SanitizePackageName(tc)
 			}
 		})

internal/extgen/validator.go

@@ -6,6 +6,7 @@ import (
 	"go/parser"
 	"go/token"
 	"regexp"
+	"slices"
 	"strings"
 )
 
@@ -115,12 +116,7 @@ func (v *Validator) validateClassProperty(prop phpClassProperty) error {
 }
 
 func (v *Validator) isValidPHPType(phpType phpType, validTypes []phpType) bool {
-	for _, valid := range validTypes {
-		if phpType == valid {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(validTypes, phpType)
 }
 
 // validateScalarTypes checks if PHP signature contains only supported scalar types
@@ -141,12 +137,7 @@ func (v *Validator) validateScalarTypes(fn phpFunction) error {
 }
 
 func (v *Validator) isScalarPHPType(phpType phpType, supportedTypes []phpType) bool {
-	for _, supported := range supportedTypes {
-		if phpType == supported {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(supportedTypes, phpType)
 }
 
 // validateGoFunctionSignatureWithOptions validates with option for method vs function

internal/watcher/watch_pattern.go

@@ -150,7 +150,7 @@ func matchBracketPattern(pattern string, fileName string) bool {
 
 	// all bracket entries are checked individually, only one needs to match
 	// *.{php,twig,yaml} -> *.php, *.twig, *.yaml
-	for _, pattern := range strings.Split(betweenTheBrackets, ",") {
+	for pattern := range strings.SplitSeq(betweenTheBrackets, ",") {
 		if matchPattern(beforeTheBrackets+pattern+afterTheBrackets, fileName) {
 			return true
 		}

phpmainthread_test.go

@@ -111,7 +111,7 @@ func TestTransitionThreadsWhileDoingRequests(t *testing.T) {
 
 	// try all possible permutations of transition, transition every ms
 	transitions := allPossibleTransitions(worker1Path, worker2Path)
-	for i := 0; i < numThreads; i++ {
+	for i := range numThreads {
 		go func(thread *phpThread, start int) {
 			for {
 				for j := start; j < len(transitions); j++ {
@@ -128,9 +128,9 @@ func TestTransitionThreadsWhileDoingRequests(t *testing.T) {
 
 	// randomly do requests to the 3 endpoints
 	wg.Add(numThreads)
-	for i := 0; i < numThreads; i++ {
+	for i := range numThreads {
 		go func(i int) {
-			for j := 0; j < numRequestsPerThread; j++ {
+			for range numRequestsPerThread {
 				switch rand.IntN(3) {
 				case 0:
 					assertRequestBody(t, "http://localhost/transition-worker-1.php", "Hello from worker 1")

recorder_test.go

@@ -227,7 +227,7 @@ func (rw *ResponseRecorder) Result() *http.Response {
 	if trailers, ok := rw.snapHeader["Trailer"]; ok {
 		res.Trailer = make(http.Header, len(trailers))
 		for _, k := range trailers {
-			for _, k := range strings.Split(k, ",") {
+			for k := range strings.SplitSeq(k, ",") {
 				k = http.CanonicalHeaderKey(textproto.TrimString(k))
 				if !httpguts.ValidTrailerHeader(k) {
 					// Ignore since forbidden by RFC 7230, section 4.1.2.

state_test.go

@@ -39,9 +39,7 @@ func TestStateShouldHaveCorrectAmountOfSubscribers(t *testing.T) {
 }
 
 func assertNumberOfSubscribers(t *testing.T, threadState *threadState, expected int) {
-	maxWaits := 10_000 // wait for 1 second max
-
-	for i := 0; i < maxWaits; i++ {
+	for range 10_000 { // wait for 1 second max
 		time.Sleep(100 * time.Microsecond)
 		threadState.mu.RLock()
 		if len(threadState.subscribers) == expected {

watcher_test.go

@@ -46,7 +46,7 @@ func pollForWorkerReset(t *testing.T, handler func(http.ResponseWriter, *http.Re
 	assert.Equal(t, "requests:1", body)
 
 	// now we spam file updates and check if the request counter resets
-	for i := 0; i < limit; i++ {
+	for range limit {
 		updateTestFile("./testdata/files/test.txt", "updated", t)
 		time.Sleep(pollingTime * time.Millisecond)
 		body, _ := testGet("http://example.com/worker-with-counter.php", handler, t)