minor cleanup

- Reused contains() from utils.go at a couple of places
- Cleanup in return statements and boolean checks

cmd/auth-handler.go

@@ -165,22 +165,18 @@ func setAuthHandler(h http.Handler) http.Handler {
 }
 
 // List of all support S3 auth types.
-var supportedS3AuthTypes = []authType{
-	authTypeAnonymous,
-	authTypePresigned,
-	authTypeSigned,
-	authTypePostPolicy,
-	authTypeStreamingSigned,
+var supportedS3AuthTypes = map[authType]struct{}{
+	authTypeAnonymous:       {},
+	authTypePresigned:       {},
+	authTypeSigned:          {},
+	authTypePostPolicy:      {},
+	authTypeStreamingSigned: {},
 }
 
 // Validate if the authType is valid and supported.
 func isSupportedS3AuthType(aType authType) bool {
-	for _, a := range supportedS3AuthTypes {
-		if a == aType {
-			return true
-		}
-	}
-	return false
+	_, ok := supportedS3AuthTypes[aType]
+	return ok
 }
 
 // handler for validating incoming authorization headers.

cmd/erasure-readfile_test.go

@@ -112,7 +112,7 @@ func testGetReadDisks(t *testing.T, xl xlObjects) {
 			t.Errorf("test-case %d - expected nextIndex: %d, got : %d", i+1, test.nextIndex, nextIndex)
 			continue
 		}
-		if reflect.DeepEqual(test.retDisks, disks) == false {
+		if !reflect.DeepEqual(test.retDisks, disks) {
 			t.Errorf("test-case %d : incorrect disks returned. expected %+v, got %+v", i+1, test.retDisks, disks)
 			continue
 		}

cmd/object-handlers.go

@@ -268,9 +268,7 @@ func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Re
 	}
 
 	// Skip the first element if it is '/', split the rest.
-	if strings.HasPrefix(objectSource, "/") {
-		objectSource = objectSource[1:]
-	}
+	objectSource = strings.TrimPrefix(objectSource, "/")
 	splits := strings.SplitN(objectSource, "/", 2)
 
 	// Save sourceBucket and sourceObject extracted from url Path.

cmd/posix.go

@@ -107,10 +107,8 @@ func newPosix(diskPath string) (StorageAPI, error) {
 	if err != nil {
 		if os.IsNotExist(err) {
 			// Disk not found create it.
-			if err = os.MkdirAll(diskPath, 0777); err != nil {
-				return fs, err
-			}
-			return fs, nil
+			err = os.MkdirAll(diskPath, 0777)
+			return fs, err
 		}
 		return fs, err
 	}

cmd/rpc-server.go

@@ -16,11 +16,7 @@ type storageServer struct {
 
 // MakeVolHandler - make vol handler is rpc wrapper for MakeVol operation.
 func (s *storageServer) MakeVolHandler(arg *string, reply *GenericReply) error {
-	err := s.storage.MakeVol(*arg)
-	if err != nil {
-		return err
-	}
-	return nil
+	return s.storage.MakeVol(*arg)
 }
 
 // ListVolsHandler - list vols handler is rpc wrapper for ListVols operation.
@@ -46,11 +42,7 @@ func (s *storageServer) StatVolHandler(arg *string, reply *VolInfo) error {
 // DeleteVolHandler - delete vol handler is a rpc wrapper for
 // DeleteVol operation.
 func (s *storageServer) DeleteVolHandler(arg *string, reply *GenericReply) error {
-	err := s.storage.DeleteVol(*arg)
-	if err != nil {
-		return err
-	}
-	return nil
+	return s.storage.DeleteVol(*arg)
 }
 
 /// File operations

cmd/server-rlimit-nix.go

@@ -37,15 +37,7 @@ func setMaxOpenFiles() error {
 	// TO increase this limit further user has to manually edit
 	// `/etc/security/limits.conf`
 	rLimit.Cur = rLimit.Max
-	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
-	if err != nil {
-		return err
-	}
-	err = syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
-	if err != nil {
-		return err
-	}
-	return nil
+	return syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
 }
 
 // Set max memory used by minio as a process, this value is usually

cmd/xl-v1-list-objects.go

@@ -76,7 +76,7 @@ func (xl xlObjects) listObjects(bucket, prefix, marker, delimiter string, maxKey
 		nextMarker = objInfo.Name
 		objInfos = append(objInfos, objInfo)
 		i++
-		if walkResult.end == true {
+		if walkResult.end {
 			eof = true
 			break
 		}

cmd/xl-v1-metadata.go

@@ -137,11 +137,10 @@ func (m xlMetaV1) IsValid() bool {
 }
 
 // ObjectPartIndex - returns the index of matching object part number.
-func (m xlMetaV1) ObjectPartIndex(partNumber int) (index int) {
+func (m xlMetaV1) ObjectPartIndex(partNumber int) int {
 	for i, part := range m.Parts {
 		if partNumber == part.Number {
-			index = i
-			return index
+			return i
 		}
 	}
 	return -1

cmd/xl-v1.go

@@ -95,13 +95,7 @@ func checkSufficientDisks(disks []string) error {
 
 // isDiskFound - validates if the disk is found in a list of input disks.
 func isDiskFound(disk string, disks []string) bool {
-	for _, d := range disks {
-		// Disk found return
-		if disk == d {
-			return true
-		}
-	}
-	return false
+	return contains(disks, disk)
 }
 
 // newXLObjects - initialize new xl object layer.

dist/linux-systemd/readme.md

@@ -26,7 +26,7 @@ EOT
 
 Put minio.service in /etc/systemd/system/
 ```
-curl https://raw.githubusercontent.com/minio/minio/master/dist/linux-systemd/minio.service > /etc/systemd/system/
+( cd /etc/systemd/system/; curl -O https://raw.githubusercontent.com/minio/minio/master/dist/linux-systemd/minio.service )
 ```
 
 Enable startup on boot