chore: Enable filepathJoin checker for gocritic

.golangci.yml

@@ -95,6 +95,7 @@ linters-settings:
       - evalOrder
       - exitAfterDefer
       - externalErrorReassign
+      - filepathJoin
       - flagName
       - mapKey
       - nilValReturn

config/config_test.go

@@ -907,7 +907,7 @@ func TestConfig_MultipleProcessorsOrder(t *testing.T) {
 			c := config.NewConfig()
 			filenames := make([]string, 0, len(test.filename))
 			for _, fn := range test.filename {
-				filenames = append(filenames, filepath.Join("./testdata/processor_order", fn))
+				filenames = append(filenames, filepath.Join(".", "testdata", "processor_order", fn))
 			}
 			require.NoError(t, c.LoadAll(filenames...))
 

internal/globpath/globpath_test.go

@@ -42,8 +42,10 @@ func TestCompileAndMatch(t *testing.T) {
 		// test exclamation mark creates non-matching list without a range
 		{path: filepath.Join(testdataDir, "log[!2]*"), matches: 2},
 		// test exclamation mark creates non-matching list without a range
+		//nolint:gocritic // filepathJoin - '\\' used to escape in glob, not path separator
 		{path: filepath.Join(testdataDir, "log\\[!*"), matches: 1},
 		// test exclamation mark creates non-matching list without a range
+		//nolint:gocritic // filepathJoin - '\\' used to escape in glob, not path separator
 		{path: filepath.Join(testdataDir, "log\\[^*"), matches: 0},
 	}
 

plugins/inputs/diskio/diskio_linux.go

@@ -132,7 +132,7 @@ func resolveName(name string) string {
 		return name
 	}
 	// Try to prepend "/dev"
-	resolved, err = filepath.EvalSymlinks(filepath.Join("/dev", name))
+	resolved, err = filepath.EvalSymlinks("/dev/" + name)
 	if err != nil {
 		return name
 	}

plugins/inputs/file/file_test.go

@@ -27,7 +27,7 @@ func TestRefreshFilePaths(t *testing.T) {
 	require.NoError(t, err)
 
 	r := File{
-		Files: []string{filepath.Join(wd, "dev/testfiles/**.log")},
+		Files: []string{filepath.Join(wd, "dev", "testfiles", "**.log")},
 	}
 	err = r.Init()
 	require.NoError(t, err)
@@ -42,7 +42,7 @@ func TestFileTag(t *testing.T) {
 	wd, err := os.Getwd()
 	require.NoError(t, err)
 	r := File{
-		Files:   []string{filepath.Join(wd, "dev/testfiles/json_a.log")},
+		Files:   []string{filepath.Join(wd, "dev", "testfiles", "json_a.log")},
 		FileTag: "filename",
 	}
 	require.NoError(t, r.Init())
@@ -67,7 +67,7 @@ func TestJSONParserCompile(t *testing.T) {
 	var acc testutil.Accumulator
 	wd, _ := os.Getwd()
 	r := File{
-		Files: []string{filepath.Join(wd, "dev/testfiles/json_a.log")},
+		Files: []string{filepath.Join(wd, "dev", "testfiles", "json_a.log")},
 	}
 	require.NoError(t, r.Init())
 
@@ -86,7 +86,7 @@ func TestGrokParser(t *testing.T) {
 	wd, _ := os.Getwd()
 	var acc testutil.Accumulator
 	r := File{
-		Files: []string{filepath.Join(wd, "dev/testfiles/grok_a.log")},
+		Files: []string{filepath.Join(wd, "dev", "testfiles", "grok_a.log")},
 	}
 	err := r.Init()
 	require.NoError(t, err)

plugins/inputs/powerdns_recursor/powerdns_recursor.go

@@ -4,7 +4,6 @@ package powerdns_recursor
 import (
 	_ "embed"
 	"fmt"
-	"path/filepath"
 	"strconv"
 	"time"
 
@@ -44,7 +43,7 @@ func (p *PowerdnsRecursor) Init() error {
 	}
 
 	if p.SocketDir == "" {
-		p.SocketDir = filepath.Join("/", "var", "run")
+		p.SocketDir = "/var/run"
 	}
 
 	switch p.ControlProtocolVersion {

plugins/inputs/prometheus/kubernetes.go

@@ -63,7 +63,7 @@ func (p *Prometheus) startK8s(ctx context.Context) error {
 			return fmt.Errorf("failed to get current user: %w", err)
 		}
 
-		kubeconfig := filepath.Join(u.HomeDir, ".kube/config")
+		kubeconfig := filepath.Join(u.HomeDir, ".kube", "config")
 
 		config, err = loadConfig(kubeconfig)
 		if err != nil {

plugins/inputs/system/ps.go

@@ -172,7 +172,7 @@ partitionRange:
 			continue
 		}
 
-		du.Path = filepath.Join("/", strings.TrimPrefix(p.Mountpoint, hostMountPrefix))
+		du.Path = filepath.Join(string(os.PathSeparator), strings.TrimPrefix(p.Mountpoint, hostMountPrefix))
 		du.Fstype = p.Fstype
 		usage = append(usage, du)
 		partitions = append(partitions, &p)

plugins/processors/port_name/services_path.go

@@ -8,5 +8,5 @@ import (
 )
 
 func servicesPath() string {
-	return filepath.Join(os.Getenv("WINDIR"), `system32\drivers\etc\services`)
+	return filepath.Join(os.Getenv("WINDIR"), "system32", "drivers", "etc", "services")
 }

testutil/socket.go

@@ -19,7 +19,7 @@ func TempSocket(tb testing.TB) string {
 	// If the name of the test is long, the path length could exceed 104
 	// characters, and this would result in listen unix ...: bind: invalid argument
 	if runtime.GOOS == "darwin" {
-		sock := filepath.Join("/tmp", "sock")
+		sock := "/tmp/sock"
 
 		tb.Cleanup(func() {
 			require.NoError(tb, os.RemoveAll(sock))