fix lint errors

Signed-off-by: Caleb Lloyd <caleb@synadia.com>

.gitignore

@@ -11,6 +11,9 @@ _test
 *.[568vq]
 [568vq].out
 
+# IDE
+.idea
+
 *.cgo1.go
 *.cgo2.c
 _cgo_defun.c

collector/collector.go

@@ -16,7 +16,7 @@ package collector
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"sync"
@@ -112,7 +112,7 @@ func getMetricURL(httpClient *http.Client, url string, response interface{}) err
 		return err
 	}
 	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}
@@ -128,7 +128,7 @@ func GetServerIDFromVarz(endpoint string, retryInterval time.Duration) string {
 			return "", err
 		}
 		defer resp.Body.Close()
-		body, err := ioutil.ReadAll(resp.Body)
+		body, err := io.ReadAll(resp.Body)
 		if err != nil {
 			return "", err
 		}

collector/jsz.go

@@ -313,7 +313,7 @@ func (nc *jszCollector) Collect(ch chan<- prometheus.Metric) {
 				serverID, serverName, clusterName, jsDomain, clusterLeader, isMetaLeader)
 		}
 
-		var isJetStreamDisabled float64 = 0
+		var isJetStreamDisabled float64
 		if resp.Disabled {
 			isJetStreamDisabled = 1
 		}

collector/log_test.go

@@ -15,7 +15,6 @@ package collector
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 )
@@ -72,15 +71,15 @@ func TestLogging(t *testing.T) {
 	// ConfigureLogger(sOpts, nOpts)
 
 	// test file
-	tmpDir, err := ioutil.TempDir("", "_exporter")
+	tmpDir, err := os.MkdirTemp("", "_exporter")
 	if err != nil {
 		t.Fatal("Could not create tmp dir")
 	}
 	defer func() {
 		_ = os.RemoveAll(tmpDir)
 	}()
 
-	file, err := ioutil.TempFile(tmpDir, "exporter:log_")
+	file, err := os.CreateTemp(tmpDir, "exporter:log_")
 	if err != nil {
 		t.Fatalf("unable to create temporary file")
 	}

exporter/exporter.go

@@ -19,9 +19,9 @@ import (
 	"crypto/x509"
 	"encoding/base64"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"net/http"
+	"os"
 	"strconv"
 	"strings"
 	"sync"
@@ -276,7 +276,7 @@ func (ne *NATSExporter) generateTLSConfig() (*tls.Config, error) {
 	}
 	// Add in CAs if applicable.
 	if ne.opts.CaFile != "" {
-		rootPEM, err := ioutil.ReadFile(ne.opts.CaFile)
+		rootPEM, err := os.ReadFile(ne.opts.CaFile)
 		if err != nil || rootPEM == nil {
 			return nil, fmt.Errorf("failed to load root ca certificate (%s): %v", ne.opts.CaFile, err)
 		}

exporter/exporter_test.go

@@ -18,8 +18,9 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
+	"os"
 	"strings"
 	"sync"
 	"testing"
@@ -52,7 +53,7 @@ func getStaticExporterTestOptions() (opts *NATSExporterOptions) {
 
 func httpGetSecure(url string) (*http.Response, error) {
 	tlsConfig := &tls.Config{}
-	caCert, err := ioutil.ReadFile(caCertFile)
+	caCert, err := os.ReadFile(caCertFile)
 	if err != nil {
 		return nil, fmt.Errorf("Got error reading RootCA file: %s", err)
 	}
@@ -113,7 +114,7 @@ func checkExporterFull(user, pass, addr, result, path string, secure bool, expec
 		return "", nil
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return "", fmt.Errorf("got an error reading the body: %v", err)
 	}

main.go

@@ -11,6 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// prometheus-nats-exporter
 package main
 
 import (

test/test.go

@@ -17,7 +17,6 @@ package test
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"os"
@@ -176,7 +175,7 @@ func RunJetStreamServerWithPorts(port, monitorPort int, domain string) *server.S
 	opts.Port = port
 	opts.JetStream = true
 	opts.JetStreamDomain = domain
-	tdir, _ := ioutil.TempDir(tempRoot, "js-storedir-")
+	tdir, _ := os.MkdirTemp(tempRoot, "js-storedir-")
 	opts.StoreDir = filepath.Dir(tdir)
 	opts.HTTPHost = "127.0.0.1"
 	opts.HTTPPort = monitorPort