Other: add straightforward linters

2021-04-08 08:00:39 +02:00
parent 7d0af7624c
commit 2d95f21567
49 changed files with 148 additions and 139 deletions
--- a/.golangci.yml
+++ b/.golangci.yml
@ -52,7 +52,6 @@ linters:
    - funlen            # Tool for detection of long functions [fast: true, auto-fix: false]
    - gochecknoglobals  # Checks that no globals are present in Go code [fast: true, auto-fix: false]
    - gochecknoinits    # Checks that no init functions are present in Go code [fast: true, auto-fix: false]
-    # - gocognit          # Computes and checks the cognitive complexity of functions [fast: true, auto-fix: false]
    - goconst           # Finds repeated strings that could be replaced by a constant [fast: true, auto-fix: false]
    - gocritic          # The most opinionated Go source code linter [fast: true, auto-fix: false]
    - gocyclo           # Computes and checks the cyclomatic complexity of functions [fast: true, auto-fix: false]
@ -68,46 +67,45 @@ linters:
    - unconvert         # Remove unnecessary type conversions [fast: true, auto-fix: false]
    - unparam           # Reports unused function parameters [fast: true, auto-fix: false]
    - whitespace        # Tool for detection of leading and trailing whitespace [fast: true, auto-fix: true]
+    - asciicheck        # Simple linter to check that your code does not contain non-ASCII identifiers [fast: true, auto-fix: false]
+    - durationcheck     # check for two durations multiplied together [fast: false, auto-fix: false]
+    - exhaustive        # check exhaustiveness of enum switch statements [fast: false, auto-fix: false]
+    - exportloopref     # checks for pointers to enclosing loop variables [fast: false, auto-fix: false]
+    - forcetypeassert   # finds forced type assertions [fast: true, auto-fix: false]
+    - godot             # Check if comments end in a period [fast: true, auto-fix: true]
+    - goheader          # Checks is file header matches to pattern [fast: true, auto-fix: false]
+    - gomodguard        # Allow and block list linter for direct Go module dependencies. This is different from depguard where there are different block types for example version constraints and module recommendations. [fast: true, auto-fix: false]
+    - goprintffuncname  # Checks that printf-like functions are named with `f` at the end [fast: true, auto-fix: false]
+    - importas          # Enforces consistent import aliases [fast: false, auto-fix: false]
+    - makezero          # Finds slice declarations with non-zero initial length [fast: false, auto-fix: false]
+    - nilerr            # Finds the code that returns nil even if it checks that the error is not nil. [fast: false, auto-fix: false]
+    - predeclared       # find code that shadows one of Go's predeclared identifiers [fast: true, auto-fix: false]
+    - revive            # Fast, configurable, extensible, flexible, and beautiful linter for Go. Drop-in replacement of golint. [fast: false, auto-fix: false]
+    - rowserrcheck      # checks whether Err of rows is checked successfully [fast: false, auto-fix: false]
+    - sqlclosecheck     # Checks that sql.Rows and sql.Stmt are closed. [fast: false, auto-fix: false]
+    - tparallel         # tparallel detects inappropriate usage of t.Parallel() method in your Go test codes [fast: false, auto-fix: false]
+    - wastedassign      # wastedassign finds wasted assignment statements. [fast: false, auto-fix: false]
    # - wsl               # Whitespace Linter - Forces you to use empty lines! [fast: true, auto-fix: false]
    # - lll               # Reports long lines [fast: true, auto-fix: false]
-    # Newly added linters (not processed yet)
-    # - asciicheck        # Simple linter to check that your code does not contain non-ASCII identifiers [fast: true, auto-fix: false]
+    # Consider to include:
+    # - gocognit          # Computes and checks the cognitive complexity of functions [fast: true, auto-fix: false]
    # - cyclop            # checks function and package cyclomatic complexity [fast: false, auto-fix: false]
-    # - durationcheck     # check for two durations multiplied together [fast: false, auto-fix: false]
    # - errorlint         # go-errorlint is a source code linter for Go software that can be used to find code that will cause problems with the error wrapping scheme introduced in Go 1.13. [fast: false, auto-fix: false]
-    # - exhaustive        # check exhaustiveness of enum switch statements [fast: false, auto-fix: false]
    # - exhaustivestruct  # Checks if all struct's fields are initialized [fast: false, auto-fix: false]
-    # - exportloopref     # checks for pointers to enclosing loop variables [fast: false, auto-fix: false]
    # - forbidigo         # Forbids identifiers [fast: true, auto-fix: false]
-    # - forcetypeassert   # finds forced type assertions [fast: true, auto-fix: false]
    # - gci               # Gci control golang package import order and make it always deterministic. [fast: true, auto-fix: true]
    # - gocognit          # Computes and checks the cognitive complexity of functions [fast: true, auto-fix: false]
-    # - godot             # Check if comments end in a period [fast: true, auto-fix: true]
    # - goerr113          # Golang linter to check the errors handling expressions [fast: false, auto-fix: false]
    # - gofumpt           # Gofumpt checks whether code was gofumpt-ed. [fast: true, auto-fix: true]
-    # - goheader          # Checks is file header matches to pattern [fast: true, auto-fix: false]
    # - gomnd             # An analyzer to detect magic numbers. [fast: true, auto-fix: false]
    # - gomoddirectives   # Manage the use of 'replace', 'retract', and 'excludes' directives in go.mod. [fast: true, auto-fix: false]
-    # - gomodguard        # Allow and block list linter for direct Go module dependencies. This is different from depguard where there are different block types for example version constraints and module recommendations. [fast: true, auto-fix: false]
-    # - goprintffuncname  # Checks that printf-like functions are named with `f` at the end [fast: true, auto-fix: false]
    # - ifshort           # Checks that your code uses short syntax for if-statements whenever possible [fast: true, auto-fix: false]
-    # - importas          # Enforces consistent import aliases [fast: false, auto-fix: false]
-    # - lll               # Reports long lines [fast: true, auto-fix: false]
-    # - makezero          # Finds slice declarations with non-zero initial length [fast: false, auto-fix: false]
    # - nestif            # Reports deeply nested if statements [fast: true, auto-fix: false]
-    # - nilerr            # Finds the code that returns nil even if it checks that the error is not nil. [fast: false, auto-fix: false]
    # - nlreturn          # nlreturn checks for a new line before return and branch statements to increase code clarity [fast: true, auto-fix: false]
    # - noctx             # noctx finds sending http request without context.Context [fast: false, auto-fix: false]
    # - nolintlint        # Reports ill-formed or insufficient nolint directives [fast: true, auto-fix: false]
    # - paralleltest      # paralleltest detects missing usage of t.Parallel() method in your Go test [fast: true, auto-fix: false]
-    # - predeclared       # find code that shadows one of Go's predeclared identifiers [fast: true, auto-fix: false]
-    # - revive            # Fast, configurable, extensible, flexible, and beautiful linter for Go. Drop-in replacement of golint. [fast: false, auto-fix: false]
-    # - rowserrcheck      # checks whether Err of rows is checked successfully [fast: false, auto-fix: false]
-    # - sqlclosecheck     # Checks that sql.Rows and sql.Stmt are closed. [fast: false, auto-fix: false]
    # - testpackage       # linter that makes you use a separate _test package [fast: true, auto-fix: false]
    # - thelper           # thelper detects golang test helpers without t.Helper() call and checks the consistency of test helpers [fast: false, auto-fix: false]
-    # - tparallel         # tparallel detects inappropriate usage of t.Parallel() method in your Go test codes [fast: false, auto-fix: false]
-    # - wastedassign      # wastedassign finds wasted assignment statements. [fast: false, auto-fix: false]
    # - wrapcheck         # Checks that errors returned from external packages are wrapped [fast: false, auto-fix: false]
-    # - wsl               # Whitespace Linter - Forces you to use empty lines! [fast: true, auto-fix: false]

--- a/internal/app/base/base.go
+++ b/internal/app/base/base.go
@ -69,7 +69,7 @@ const (
 	flagMemProfileShort = "m"
 	flagLogLevel        = "log-level"
 	flagLogLevelShort   = "l"
-	// FlagCLI indicate to start with command line interface
+	// FlagCLI indicate to start with command line interface.
 	FlagCLI      = "cli"
 	flagCLIShort = "c"
 	flagRestart  = "restart"
--- a/internal/app/base/migration.go
+++ b/internal/app/base/migration.go
@ -34,7 +34,7 @@ import (
 // | prefs     | ~/.cache/protonmail/<app>/c11/prefs.json  | ~/.config/protonmail/<app>/prefs.json  |
 // | c11 1.5.x | ~/.cache/protonmail/<app>/c11             | ~/.cache/protonmail/<app>/cache/c11    |
 // | c11 1.6.x | ~/.cache/protonmail/<app>/cache/c11       | ~/.config/protonmail/<app>/cache/c11   |
-// | updates   | ~/.cache/protonmail/<app>/updates         | ~/.config/protonmail/<app>/updates     |
+// | updates   | ~/.cache/protonmail/<app>/updates         | ~/.config/protonmail/<app>/updates     |.
 func migrateFiles(configName string) error {
 	locationsProvider, err := locations.NewDefaultProvider(filepath.Join(constants.VendorName, configName))
 	if err != nil {
@ -50,7 +50,7 @@ func migrateFiles(configName string) error {
 	if err := migrateCacheFromBoth15xAnd16x(locations, userCacheDir); err != nil {
 		return err
 	}
-	if err := migrateUpdatesFrom16x(configName, locations); err != nil {
+	if err := migrateUpdatesFrom16x(configName, locations); err != nil { //nolint[revive] It is more clear to structure this way
 		return err
 	}
 	return nil
--- a/internal/config/tls/tls.go
+++ b/internal/config/tls/tls.go
@ -122,11 +122,7 @@ func (t *TLS) GenerateCerts(template *x509.Certificate) error {
 	}
 	defer keyOut.Close() // nolint[errcheck]

-	if err := pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)}); err != nil {
-		return err
-	}
-
-	return nil
+	return pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
 }

 // GetConfig tries to load TLS config or generate new one which is then returned.
--- a/internal/imap/id/extension.go
+++ b/internal/imap/id/extension.go
@ -26,7 +26,7 @@ type currentClientSetter interface {
 	SetClient(name, version string)
 }

-// Extension for IMAP server
+// Extension for IMAP server.
 type extension struct {
 	extID        imapserver.ConnExtension
 	clientSetter currentClientSetter
--- a/internal/imap/mailbox_message.go
+++ b/internal/imap/mailbox_message.go
@ -227,7 +227,8 @@ func (im *imapMailbox) importMessage(m *pmapi.Message, readers []io.Reader, kr *
 }

 func (im *imapMailbox) getMessage(storeMessage storeMessageProvider, items []imap.FetchItem, msgBuildCountHistogram *msgBuildCountHistogram) (msg *imap.Message, err error) { //nolint[funlen]
-	im.log.WithField("msgID", storeMessage.ID()).Trace("Getting message")
+	msglog := im.log.WithField("msgID", storeMessage.ID())
+	msglog.Trace("Getting message")

 	seqNum, err := storeMessage.SequenceNumber()
 	if err != nil {
@ -267,7 +268,7 @@ func (im *imapMailbox) getMessage(storeMessage storeMessageProvider, items []ima
 			// Size attribute on the server counts encrypted data. The value is cleared
 			// on our part and we need to compute "real" size of decrypted data.
 			if m.Size <= 0 {
-				im.log.WithField("msgID", storeMessage.ID()).Trace("Size unknown - downloading body")
+				msglog.Debug("Size unknown - downloading body")
 				// We are sure the size is not a problem right now. Clients
 				// might not first check sizes of all messages so we couldn't
 				// be sure if seeing 1st or 2nd sync is all right or not.
@ -283,6 +284,8 @@ func (im *imapMailbox) getMessage(storeMessage storeMessageProvider, items []ima
 			if err != nil {
 				return nil, err
 			}
+		case imap.FetchAll, imap.FetchFast, imap.FetchFull, imap.FetchRFC822, imap.FetchRFC822Header, imap.FetchRFC822Text:
+			fallthrough // this is list of defined items by go-imap, but items can be also sections generated from requests
 		default:
 			if err = im.getLiteralForSection(item, msg, storeMessage, msgBuildCountHistogram); err != nil {
 				return
@ -295,8 +298,8 @@ func (im *imapMailbox) getMessage(storeMessage storeMessageProvider, items []ima

 func (im *imapMailbox) getLiteralForSection(itemSection imap.FetchItem, msg *imap.Message, storeMessage storeMessageProvider, msgBuildCountHistogram *msgBuildCountHistogram) error {
 	section, err := imap.ParseBodySectionName(itemSection)
-	if err != nil { // Ignore error
-		return nil
+	if err != nil {
+		return nil //nolint[nilerr] ignore error
 	}

 	var literal imap.Literal
@ -743,7 +746,7 @@ func (im *imapMailbox) buildMessageInner(m *pmapi.Message, kr *crypto.KeyRing) (
 		}

 		processCallback := func(value interface{}) (interface{}, error) {
-			att := value.(*pmapi.Attachment)
+			att := value.(*pmapi.Attachment) //nolint[forcetypeassert] we want to panic here

 			buf := &bytes.Buffer{}
 			if err = im.writeAttachmentBody(buf, m, att); err != nil {
@ -753,7 +756,7 @@ func (im *imapMailbox) buildMessageInner(m *pmapi.Message, kr *crypto.KeyRing) (
 		}

 		collectCallback := func(idx int, value interface{}) error {
-			buf := value.(*bytes.Buffer)
+			buf := value.(*bytes.Buffer) //nolint[forcetypeassert] we want to panic here
 			defer buf.Reset()
 			att := atts[idx]

--- a/internal/imap/mailbox_messages.go
+++ b/internal/imap/mailbox_messages.go
@ -141,7 +141,7 @@ func (im *imapMailbox) addOrRemoveFlags(operation imap.FlagsOp, messageIDs, flag
 	for _, f := range flags {
 		switch f {
 		case imap.SeenFlag:
-			switch operation {
+			switch operation { //nolint[exhaustive] imap.SetFlags is processed by im.setFlags
 			case imap.AddFlags:
 				if err := im.storeMailbox.MarkMessagesRead(messageIDs); err != nil {
 					return err
@ -152,7 +152,7 @@ func (im *imapMailbox) addOrRemoveFlags(operation imap.FlagsOp, messageIDs, flag
 				}
 			}
 		case imap.FlaggedFlag:
-			switch operation {
+			switch operation { //nolint[exhaustive] imap.SetFlag is processed by im.setFlags
 			case imap.AddFlags:
 				if err := im.storeMailbox.MarkMessagesStarred(messageIDs); err != nil {
 					return err
@ -163,7 +163,7 @@ func (im *imapMailbox) addOrRemoveFlags(operation imap.FlagsOp, messageIDs, flag
 				}
 			}
 		case imap.DeletedFlag:
-			switch operation {
+			switch operation { //nolint[exhaustive] imap.SetFlag is processed by im.setFlags
 			case imap.AddFlags:
 				if err := im.storeMailbox.MarkMessagesDeleted(messageIDs); err != nil {
 					return err
@ -182,7 +182,7 @@ func (im *imapMailbox) addOrRemoveFlags(operation imap.FlagsOp, messageIDs, flag
 			}

 			// Handle custom junk flags for Apple Mail and Thunderbird.
-			switch operation {
+			switch operation { //nolint[exhaustive] imap.SetFlag is processed by im.setFlags
 			// No label removal is necessary because Spam and Inbox are both exclusive labels so the backend
 			// will automatically take care of label removal.
 			case imap.AddFlags:
@ -536,7 +536,7 @@ func (im *imapMailbox) listMessages(isUID bool, seqSet *imap.SeqSet, items []ima
 	}

 	processCallback := func(value interface{}) (interface{}, error) {
-		apiID := value.(string)
+		apiID := value.(string) //nolint[forcetypeassert] we want to panic here

 		storeMessage, err := im.storeMailbox.GetMessage(apiID)
 		if err != nil {
@ -570,7 +570,7 @@ func (im *imapMailbox) listMessages(isUID bool, seqSet *imap.SeqSet, items []ima
 	}

 	collectCallback := func(idx int, value interface{}) error {
-		msg := value.(*imap.Message)
+		msg := value.(*imap.Message) //nolint[forcetypeassert] we want to panic here
 		msgResponse <- msg
 		return nil
 	}
--- a/internal/imap/msg_build_counts.go
+++ b/internal/imap/msg_build_counts.go
@ -32,7 +32,7 @@ import (
 // - 100 messages were downloaded first time
 // - 100 messages were downloaded second time
 // - 99 messages were downloaded 10th times
-// - 1 messages were downloaded 100th times
+// - 1 messages were downloaded 100th times.
 type msgBuildCountHistogram struct {
 	// Key represents how many times message was build.
 	// Value stores how many messages are build X times based on the key.
--- a/internal/imap/uidplus/extension.go
+++ b/internal/imap/uidplus/extension.go
@ -33,7 +33,7 @@ import (
 	"github.com/sirupsen/logrus"
 )

-// Capability extension identifier
+// Capability extension identifier.
 const Capability = "UIDPLUS"

 const (
@ -228,7 +228,9 @@ func getStatusResponseCopy(uidValidity uint32, sourceSeq, targetSeq *OrderedSeq)

 // CopyResponse prepares OK response with extended UID information about copied message.
 func CopyResponse(uidValidity uint32, sourceSeq, targetSeq *OrderedSeq) error {
-	return imap.ErrStatusResp{getStatusResponseCopy(uidValidity, sourceSeq, targetSeq)}
+	return &imap.ErrStatusResp{
+		Resp: getStatusResponseCopy(uidValidity, sourceSeq, targetSeq),
+	}
 }

 func getStatusResponseAppend(uidValidity uint32, targetSeq *OrderedSeq) *imap.StatusResp {
@ -250,5 +252,7 @@ func getStatusResponseAppend(uidValidity uint32, targetSeq *OrderedSeq) *imap.St

 // AppendResponse prepares OK response with extended UID information about appended message.
 func AppendResponse(uidValidity uint32, targetSeq *OrderedSeq) error {
-	return imap.ErrStatusResp{getStatusResponseAppend(uidValidity, targetSeq)}
+	return &imap.ErrStatusResp{
+		Resp: getStatusResponseAppend(uidValidity, targetSeq),
+	}
 }
--- a/internal/importexport/importexport.go
+++ b/internal/importexport/importexport.go
@ -88,7 +88,7 @@ func (ie *ImportExport) ReportBug(osType, osVersion, description, accountName, a
 	return nil
 }

-// ReportFile submits import report file
+// ReportFile submits import report file.
 func (ie *ImportExport) ReportFile(osType, osVersion, accountName, address string, logdata []byte) error {
 	c := ie.clientManager.GetAnonymousClient()
 	defer c.Logout()
--- a/internal/locations/locations.go
+++ b/internal/locations/locations.go
@ -34,7 +34,7 @@ import (
 // - logs: ~/.cache/protonmail/<app>/logs
 // - cache: ~/.config/protonmail/<app>/cache
 // - updates: ~/.config/protonmail/<app>/updates
-// - lockfile: ~/.cache/protonmail/<app>/<app>.lock
+// - lockfile: ~/.cache/protonmail/<app>/<app>.lock .
 type Locations struct {
 	userConfig, userCache string
 	configName            string
--- a/internal/smtp/preferences.go
+++ b/internal/smtp/preferences.go
@ -173,7 +173,7 @@ func (b *sendPreferencesBuilder) withPublicKey(v *crypto.KeyRing) {
 //								| 16 (PGP/MIME),
 //     mimeType: 'text/html' | 'text/plain' | 'multipart/mixed',
 //     publicKey: OpenPGPKey | undefined/null
-// }
+// }.
 func (b *sendPreferencesBuilder) build() (p SendPreferences) {
 	p.Encrypt = b.shouldEncrypt()
 	p.Sign = b.shouldSign()
@ -492,6 +492,8 @@ func (b *sendPreferencesBuilder) setEncryptionPreferences(mailSettings pmapi.Mai
 		b.withSchemeDefault(pgpInline)
 	case pmapi.PGPMIMEPackage:
 		b.withSchemeDefault(pgpMIME)
+	case pmapi.ClearMIMEPackage, pmapi.ClearPackage, pmapi.EncryptedOutsidePackage, pmapi.InternalPackage:
+		// nothing to set
 	}

 	// Its value is constrained by the sign flag and the PGP scheme:
--- a/internal/store/event_loop.go
+++ b/internal/store/event_loop.go
@ -156,6 +156,7 @@ func (loop *eventLoop) loop() {
 			return
 		case <-t.C:
 			// Randomise periodic calls within range pollInterval ± pollSpread to reduces potential load spikes on API.
+			//nolint[gosec] It is OK to use weaker random number generator here
 			time.Sleep(time.Duration(rand.Intn(2*int(pollIntervalSpread.Milliseconds()))) * time.Millisecond)
 		case eventProcessedCh = <-loop.pollCh:
 			// We don't want to wait here. Polling should happen instantly.
@ -381,6 +382,8 @@ func (loop *eventLoop) processAddresses(log *logrus.Entry, addressEvents []*pmap
 			log.WithField("email", email).Debug("Address was deleted")
 			loop.user.CloseConnection(email)
 			loop.events.Emit(bridgeEvents.AddressChangedLogoutEvent, email)
+		case pmapi.EventUpdateFlags:
+			log.Error("EventUpdateFlags for address event is uknown operation")
 		}
 	}

@ -409,6 +412,8 @@ func (loop *eventLoop) processLabels(eventLog *logrus.Entry, labels []*pmapi.Eve
 			if err := loop.store.deleteMailboxEvent(eventLabel.ID); err != nil {
 				return errors.Wrap(err, "failed to delete label")
 			}
+		case pmapi.EventUpdateFlags:
+			log.Error("EventUpdateFlags for label event is uknown operation")
 		}
 	}

--- a/internal/store/mailbox.go
+++ b/internal/store/mailbox.go
@ -254,7 +254,7 @@ func (storeMailbox *Mailbox) txGetAPIIDsBucket(tx *bolt.Tx) *bolt.Bucket {
 	return storeMailbox.txGetBucket(tx).Bucket(apiIDsBucket)
 }

-// txGetDeletedIDsBucket returns the bucket with messagesID marked as deleted
+// txGetDeletedIDsBucket returns the bucket with messagesID marked as deleted.
 func (storeMailbox *Mailbox) txGetDeletedIDsBucket(tx *bolt.Tx) *bolt.Bucket {
 	return storeMailbox.txGetBucket(tx).Bucket(deletedIDsBucket)
 }
--- a/internal/store/mailbox_message.go
+++ b/internal/store/mailbox_message.go
@ -25,7 +25,7 @@ import (
 )

 // ErrAllMailOpNotAllowed is error user when user tries to do unsupported
-// operation on All Mail folder
+// operation on All Mail folder.
 var ErrAllMailOpNotAllowed = errors.New("operation not allowed for 'All Mail' folder")

 // GetMessage returns the `pmapi.Message` struct wrapped in `StoreMessage`
@ -177,7 +177,7 @@ func (storeMailbox *Mailbox) MarkMessagesUnstarred(apiIDs []string) error {
 }

 // MarkMessagesDeleted adds local flag \Deleted. This is not propagated to API
-// until RemoveDeleted is called
+// until RemoveDeleted is called.
 func (storeMailbox *Mailbox) MarkMessagesDeleted(apiIDs []string) error {
 	log.WithFields(logrus.Fields{
 		"messages": apiIDs,
--- a/internal/store/message.go
+++ b/internal/store/message.go
@ -64,7 +64,7 @@ func (message *Message) Message() *pmapi.Message {
 }

 // IsMarkedDeleted returns true if message is marked as deleted for specific
-// mailbox
+// mailbox.
 func (message *Message) IsMarkedDeleted() bool {
 	isMarkedAsDeleted := false
 	err := message.storeMailbox.db().View(func(tx *bolt.Tx) error {
--- a/internal/store/store.go
+++ b/internal/store/store.go
@ -34,15 +34,15 @@ import (
 )

 const (
-	// PathDelimiter for IMAP
+	// PathDelimiter for IMAP.
 	PathDelimiter = "/"
-	// UserLabelsMailboxName for IMAP
+	// UserLabelsMailboxName for IMAP.
 	UserLabelsMailboxName = "Labels"
-	// UserLabelsPrefix contains name with delimiter for IMAP
+	// UserLabelsPrefix contains name with delimiter for IMAP.
 	UserLabelsPrefix = UserLabelsMailboxName + PathDelimiter
-	// UserFoldersMailboxName for IMAP
+	// UserFoldersMailboxName for IMAP.
 	UserFoldersMailboxName = "Folders"
-	// UserFoldersPrefix contains name with delimiter for IMAP
+	// UserFoldersPrefix contains name with delimiter for IMAP.
 	UserFoldersPrefix = UserFoldersMailboxName + PathDelimiter
 )

--- a/internal/store/store_test_exports.go
+++ b/internal/store/store_test_exports.go
@ -90,10 +90,7 @@ func (store *Store) TestDumpDB(tb assert.TestingT) {
 				return err
 			}
 		}
-		if err := txMails(tx); err != nil {
-			return err
-		}
-		return nil
+		return txMails(tx)
 	}

 	assert.NoError(tb, store.db.View(txDump))
--- a/internal/store/user_message.go
+++ b/internal/store/user_message.go
@ -289,7 +289,7 @@ func clearNonMetadata(onlyMeta *pmapi.Message) {
 // If there is stored message in metaBucket the size, header and MIMEType are
 // not changed if already set. To change these:
 // * size must be updated by Message.SetSize
-// * contentType and header must be updated by Message.SetContentTypeAndHeader
+// * contentType and header must be updated by Message.SetContentTypeAndHeader.
 func txUpdateMetadaFromDB(metaBucket *bolt.Bucket, onlyMeta *pmapi.Message, log *logrus.Entry) {
 	// Size attribute on the server is counting encrypted data. We need to compute
 	// "real" size of decrypted data. Negative values will be processed during fetch.
--- a/internal/transfer/mailbox.go
+++ b/internal/transfer/mailbox.go
@ -35,7 +35,7 @@ var systemFolderMapping = map[string]string{ //nolint[gochecknoglobals]
 	// Add more translations.
 }

-// LeastUsedColor is intended to return color for creating a new inbox or label
+// LeastUsedColor is intended to return color for creating a new inbox or label.
 func LeastUsedColor(mailboxes []Mailbox) string {
 	usedColors := []string{}
 	for _, m := range mailboxes {
--- a/internal/transfer/provider_imap.go
+++ b/internal/transfer/provider_imap.go
@ -27,7 +27,7 @@ import (

 type IMAPClientProvider interface {
 	Capability() (map[string]bool, error)
-	Support(cap string) (bool, error)
+	Support(capability string) (bool, error)
 	State() imap.ConnState
 	SupportAuth(mech string) (bool, error)
 	Authenticate(auth sasl.Client) error
--- a/internal/transfer/provider_pmapi_target.go
+++ b/internal/transfer/provider_pmapi_target.go
@ -329,10 +329,10 @@ func (p *PMAPIProvider) importMessage(msgSourceID string, progress *Progress, re
 		}
 		if results[0].Error != nil {
 			importedErr = errors.Wrap(results[0].Error, "failed to import message")
-			return nil // Call passed but API refused this message, skip this one.
+			return nil //nolint[nilerr] Call passed but API refused this message, skip this one.
 		}
 		importedID = results[0].MessageID
 		return nil
 	})
-	return
+	return importedID, importedErr
 }
--- a/internal/transfer/provider_test.go
+++ b/internal/transfer/provider_test.go
@ -85,7 +85,7 @@ func testTransferFrom(t *testing.T, rules transferRules, provider TargetProvider
 		progress.finish()
 	}()

-	maxWait := time.Duration(len(messages)) * 2 * time.Second
+	maxWait := time.Duration(len(messages)*2) * time.Second
 	a.Eventually(t, func() bool {
 		return progress.updateCh == nil
 	}, maxWait, 10*time.Millisecond, "Waiting for imported messages timed out")
--- a/internal/updater/version.go
+++ b/internal/updater/version.go
@ -78,7 +78,7 @@ type VersionInfo struct {
 //   "...": {
 //     ...
 //   }
-// }
+// }.
 type VersionMap map[string]VersionInfo

 // getVersionFileURL returns the URL of the version file.
--- a/internal/users/credentials/store_test.go
+++ b/internal/users/credentials/store_test.go
@ -67,7 +67,7 @@ func (s *testCredentials) MarshalGob() string {
 	if err := enc.Encode(s); err != nil {
 		return ""
 	}
-	fmt.Printf("MarshalGob: %#v\n", buf.String())
+	log.Infof("MarshalGob: %#v\n", buf.String())
 	return base64.StdEncoding.EncodeToString(buf.Bytes())
 }

@ -88,13 +88,13 @@ func (s *testCredentials) UnmarshalGob(secret string) error {
 	s.Clear()
 	b, err := base64.StdEncoding.DecodeString(secret)
 	if err != nil {
-		fmt.Println("decode base64", b)
+		log.Infoln("decode base64", b)
 		return err
 	}
 	buf := bytes.NewBuffer(b)
 	dec := gob.NewDecoder(buf)
 	if err = dec.Decode(s); err != nil {
-		fmt.Println("decode gob", b, buf.Bytes())
+		log.Info("decode gob", b, buf.Bytes())
 		return err
 	}
 	return nil
@ -102,7 +102,7 @@ func (s *testCredentials) UnmarshalGob(secret string) error {

 func (s *testCredentials) ToJSON() string {
 	if b, err := json.Marshal(s); err == nil {
-		fmt.Printf("MarshalJSON: %#v\n", string(b))
+		log.Infof("MarshalJSON: %#v\n", string(b))
 		return base64.StdEncoding.EncodeToString(b)
 	}
 	return ""
@ -134,7 +134,7 @@ func (s *testCredentials) MarshalFmt() string {
 		s.IsHidden,
 		s.IsCombinedAddressMode,
 	)
-	fmt.Printf("MarshalFmt: %#v\n", buf.String())
+	log.Infof("MarshalFmt: %#v\n", buf.String())
 	return base64.StdEncoding.EncodeToString(buf.Bytes())
 }

@ -144,7 +144,7 @@ func (s *testCredentials) UnmarshalFmt(secret string) error {
 		return err
 	}
 	buf := bytes.NewBuffer(b)
-	fmt.Println("decode fmt", b, buf.Bytes())
+	log.Infoln("decode fmt", b, buf.Bytes())
 	_, err = fmt.Fscanf(
 		buf, secretFormat,
 		&s.UserID,
@ -190,7 +190,7 @@ func (s *testCredentials) MarshalStrings() string { // this is the most space ef

 	str := strings.Join(items, sep)

-	fmt.Printf("MarshalJoin: %#v\n", str)
+	log.Infof("MarshalJoin: %#v\n", str)
 	return base64.StdEncoding.EncodeToString([]byte(str))
 }

@ -237,37 +237,37 @@ func (s *testCredentials) IsSame(rhs *testCredentials) bool {

 func TestMarshalFormats(t *testing.T) {
 	input := testCredentials{UserID: "007", Emails: "ja@pm.me;jakub@cu.th", Timestamp: 152469263742, IsHidden: true}
-	fmt.Printf("input %#v\n", input)
+	log.Infof("input %#v\n", input)

 	secretStrings := input.MarshalStrings()
-	fmt.Printf("secretStrings %#v %d\n", secretStrings, len(secretStrings))
+	log.Infof("secretStrings %#v %d\n", secretStrings, len(secretStrings))
 	secretGob := input.MarshalGob()
-	fmt.Printf("secretGob %#v %d\n", secretGob, len(secretGob))
+	log.Infof("secretGob %#v %d\n", secretGob, len(secretGob))
 	secretJSON := input.ToJSON()
-	fmt.Printf("secretJSON %#v %d\n", secretJSON, len(secretJSON))
+	log.Infof("secretJSON %#v %d\n", secretJSON, len(secretJSON))
 	secretFmt := input.MarshalFmt()
-	fmt.Printf("secretFmt %#v %d\n", secretFmt, len(secretFmt))
+	log.Infof("secretFmt %#v %d\n", secretFmt, len(secretFmt))

 	output := testCredentials{APIToken: "refresh"}
 	require.NoError(t, output.UnmarshalStrings(secretStrings))
-	fmt.Printf("strings out %#v \n", output)
+	log.Infof("strings out %#v \n", output)
 	require.True(t, input.IsSame(&output), "strings out not same")

 	output = testCredentials{APIToken: "refresh"}
 	require.NoError(t, output.UnmarshalGob(secretGob))
-	fmt.Printf("gob out %#v\n \n", output)
+	log.Infof("gob out %#v\n \n", output)
 	assert.Equal(t, input, output)

 	output = testCredentials{APIToken: "refresh"}
 	require.NoError(t, output.FromJSON(secretJSON))
-	fmt.Printf("json out %#v \n", output)
+	log.Infof("json out %#v \n", output)
 	require.True(t, input.IsSame(&output), "json out not same")

 	/*
 		// Simple Fscanf not working!
 		output = testCredentials{APIToken: "refresh"}
 			require.NoError(t, output.UnmarshalFmt(secretFmt))
-			fmt.Printf("fmt out %#v \n", output)
+			log.Infof("fmt out %#v \n", output)
 			require.True(t, input.IsSame(&output), "fmt out not same")
 	*/
 }
@ -285,13 +285,13 @@ func TestMarshal(t *testing.T) {
 		IsHidden:              true,
 		IsCombinedAddressMode: false,
 	}
-	fmt.Printf("input %#v\n", input)
+	log.Infof("input %#v\n", input)

 	secret := input.Marshal()
-	fmt.Printf("secret %#v %d\n", secret, len(secret))
+	log.Infof("secret %#v %d\n", secret, len(secret))

 	output := Credentials{APIToken: "refresh"}
 	require.NoError(t, output.Unmarshal(secret))
-	fmt.Printf("output %#v\n", output)
+	log.Infof("output %#v\n", output)
 	assert.Equal(t, input, output)
 }
--- a/pkg/algo/sets.go
+++ b/pkg/algo/sets.go
@ -19,7 +19,7 @@ package algo

 import "reflect"

-// SetIntersection complexity: O(n^2), could be better but this is simple enough
+// SetIntersection complexity: O(n^2), could be better but this is simple enough.
 func SetIntersection(a, b interface{}, eq func(a, b interface{}) bool) []interface{} {
 	set := make([]interface{}, 0)
 	av := reflect.ValueOf(a)
--- a/pkg/message/body.go
+++ b/pkg/message/body.go
@ -51,9 +51,8 @@ func WriteAttachmentBody(w io.Writer, kr *crypto.KeyRing, m *pmapi.Message, att
 	var dr io.Reader
 	dr, err = att.Decrypt(r, kr)
 	if err == openpgperrors.ErrKeyIncorrect {
-		// Do not fail if attachment is encrypted with a different key.
+		err = nil //nolint[wastedassing] Do not fail if attachment is encrypted with a different key.
 		dr = r
-		err = nil
 		att.Name += ".gpg"
 		att.MIMEType = "application/pgp-encrypted" //nolint
 	} else if err != nil && err != openpgperrors.ErrSignatureExpired {
--- a/pkg/message/build.go
+++ b/pkg/message/build.go
@ -48,7 +48,7 @@ func NewBuilder(client pmapi.Client, message *pmapi.Message) *Builder {
 	return &Builder{cl: client, msg: message, EncryptedToHTML: true, successfullyDecrypted: false}
 }

-// fetchMessage will update original PM message if successful
+// fetchMessage will update original PM message if successful.
 func (bld *Builder) fetchMessage() (err error) {
 	if bld.msg.Body != "" {
 		return nil
@ -211,11 +211,11 @@ func (bld *Builder) BuildMessage() (structure *BodyStructure, message []byte, er
 	return structure, message, err
 }

-// SuccessfullyDecrypted is true when message was fetched and decrypted successfully
+// SuccessfullyDecrypted is true when message was fetched and decrypted successfully.
 func (bld *Builder) SuccessfullyDecrypted() bool { return bld.successfullyDecrypted }

 // WriteBody decrypts PM message and writes main body section. The external PGP
-// message is written as is (including attachments)
+// message is written as is (including attachments).
 func (bld *Builder) WriteBody(w io.Writer) error {
 	kr, err := bld.cl.KeyRingForAddressID(bld.msg.AddressID)
 	if err != nil {
@ -238,7 +238,7 @@ func (bld *Builder) WriteBody(w io.Writer) error {
 	return err
 }

-// WriteAttachmentBody decrypts and writes the attachments
+// WriteAttachmentBody decrypts and writes the attachments.
 func (bld *Builder) WriteAttachmentBody(w io.Writer, att *pmapi.Attachment, attReader io.Reader) (err error) {
 	kr, err := bld.cl.KeyRingForAddressID(bld.msg.AddressID)
 	if err != nil {
@ -248,9 +248,8 @@ func (bld *Builder) WriteAttachmentBody(w io.Writer, att *pmapi.Attachment, attR
 	var dr io.Reader
 	dr, err = att.Decrypt(attReader, kr)
 	if err == openpgperrors.ErrKeyIncorrect {
-		// Do not fail if attachment is encrypted with a different key
+		err = nil //nolint[wastedasign] Do not fail if attachment is encrypted with a different key
 		dr = attReader
-		err = nil
 		att.Name += ".gpg"
 		att.MIMEType = "application/pgp-encrypted"
 	} else if err != nil && err != openpgperrors.ErrSignatureExpired {
--- a/pkg/message/section.go
+++ b/pkg/message/section.go
@ -38,7 +38,7 @@ type SectionInfo struct {
 	reader                    io.Reader
 }

-// Read and count
+// Read and count.
 func (si *SectionInfo) Read(p []byte) (n int, err error) {
 	n, err = si.reader.Read(p)
 	si.Size += n
@ -237,11 +237,11 @@ func (bs *BodyStructure) parseAllChildSections(r io.Reader, currentPath []int, s
 	}

 	// Clear all buffers.
-	bodyReader = nil
+	bodyReader = nil //nolint[wastedassign] just to be sure we clear garbage collector
 	bodyInfo.reader = nil
 	tp.R = nil
-	tp = nil
-	bufInfo = nil // nolint
+	tp = nil      //nolint[wastedassign] just to be sure we clear garbage collector
+	bufInfo = nil //nolint[ineffassign] just to be sure we clear garbage collector
 	info.reader = nil

 	// Store boundaries.
@ -305,6 +305,11 @@ func stringPathFromInts(ints []int) (ret string) {
 	return
 }

+func (bs *BodyStructure) hasInfo(sectionPath []int) bool {
+	_, err := bs.getInfo(sectionPath)
+	return err == nil
+}
+
 func (bs *BodyStructure) getInfo(sectionPath []int) (sectionInfo *SectionInfo, err error) {
 	path := stringPathFromInts(sectionPath)
 	sectionInfo, ok := (*bs)[path]
@ -404,7 +409,7 @@ func (bs *BodyStructure) IMAPBodyStructure(currentPart []int) (imapBS *imap.Body

 	nextPart := append(currentPart, 1)
 	for {
-		if _, err := bs.getInfo(nextPart); err != nil {
+		if !bs.hasInfo(nextPart) {
 			break
 		}
 		var subStruct *imap.BodyStructure
--- a/pkg/parallel/parallel_test.go
+++ b/pkg/parallel/parallel_test.go
@ -89,7 +89,7 @@ func TestParallelErrorInProcess(t *testing.T) {
 				return value, nil
 			}
 			collect := func(idx int, value interface{}) error {
-				lastCollected = value.(int)
+				lastCollected = value.(int) //nolint[forcetypeassert]
 				return nil
 			}

--- a/pkg/pmapi/dialer.go
+++ b/pkg/pmapi/dialer.go
@ -61,7 +61,7 @@ func NewBasicTLSDialer() *BasicTLSDialer {
 func (b *BasicTLSDialer) DialTLS(network, address string) (conn net.Conn, err error) {
 	dialer := &net.Dialer{Timeout: 30 * time.Second} // Alternative Routes spec says this should be a 30s timeout.

-	var tlsConfig *tls.Config = nil
+	var tlsConfig *tls.Config

 	// If we are not dialing the standard API then we should skip cert verification checks.
 	if address != rootURL {
--- a/pkg/pmapi/dialer_proxy.go
+++ b/pkg/pmapi/dialer_proxy.go
@ -39,7 +39,7 @@ func NewProxyTLSDialer(dialer TLSDialer, cm *ClientManager) *ProxyTLSDialer {
 // DialTLS dials the given network/address. If it fails, it retries using a proxy.
 func (d *ProxyTLSDialer) DialTLS(network, address string) (conn net.Conn, err error) {
 	if conn, err = d.dialer.DialTLS(network, address); err == nil {
-		return
+		return conn, nil
 	}

 	if !d.cm.allowProxy {
--- a/pkg/pmapi/events.go
+++ b/pkg/pmapi/events.go
@ -107,6 +107,8 @@ func (em *EventMessage) UnmarshalJSON(b []byte) (err error) {
 	case EventUpdate, EventUpdateFlags:
 		em.Updated = &EventMessageUpdated{ID: raw.ID}
 		return json.Unmarshal(raw.Message, em.Updated)
+	case EventDelete:
+		return nil
 	}
 	return nil
 }
@ -121,6 +123,7 @@ func (em *EventMessage) MarshalJSON() ([]byte, error) {
 		raw.Message, err = json.Marshal(em.Created)
 	case EventUpdate, EventUpdateFlags:
 		raw.Message, err = json.Marshal(em.Updated)
+	case EventDelete:
 	}
 	if err != nil {
 		return nil, err
--- a/pkg/pmapi/key.go
+++ b/pkg/pmapi/key.go
@ -25,7 +25,7 @@ import (
 	"github.com/ProtonMail/gopenpgp/v2/crypto"
 )

-// Flags
+// Key flags.
 const (
 	UseToVerifyFlag = 1 << iota
 	UseToEncryptFlag
--- a/pkg/pmapi/labels.go
+++ b/pkg/pmapi/labels.go
@ -22,7 +22,7 @@ import (
 	"fmt"
 )

-// System labels
+// System labels.
 const (
 	InboxLabel     = "0"
 	AllDraftsLabel = "1"
@ -188,7 +188,7 @@ func (c *client) DeleteLabel(id string) (err error) {
 	return
 }

-// LeastUsedColor is intended to return color for creating a new inbox or label
+// LeastUsedColor is intended to return color for creating a new inbox or label.
 func LeastUsedColor(colors []string) (color string) {
 	color = LabelColors[0]
 	frequency := map[string]int{}
--- a/pkg/pmapi/message_send.go
+++ b/pkg/pmapi/message_send.go
@ -24,14 +24,14 @@ import (
 	"github.com/ProtonMail/gopenpgp/v2/crypto"
 )

-// Draft actions
+// Draft actions.
 const (
 	DraftActionReply    = 0
 	DraftActionReplyAll = 1
 	DraftActionForward  = 2
 )

-// PackageFlag for send message package types
+// PackageFlag for send message package types.
 type PackageFlag int

 func (p *PackageFlag) Has(flag PackageFlag) bool { return iHasFlag(int(*p), int(flag)) }
@ -65,7 +65,7 @@ const (
 	SignatureAttachedArmored = SignatureFlag(2)
 )

-// DraftReq defines paylod for creating drafts
+// DraftReq defines paylod for creating drafts.
 type DraftReq struct {
 	Message              *Message
 	ParentID             string `json:",omitempty"`
--- a/pkg/pmapi/proxy_test.go
+++ b/pkg/pmapi/proxy_test.go
@ -52,7 +52,7 @@ func getTrustedServerWithHandler(handler http.HandlerFunc) *httptest.Server {
 	return proxy
 }

-// server.crt
+// server.crt data.
 const servercrt = `
 -----BEGIN CERTIFICATE-----
 MIIE5TCCA82gAwIBAgIJAKsmhcMFGfGcMA0GCSqGSIb3DQEBCwUAMIGsMQswCQYD
--- a/pkg/pmapi/server_test.go
+++ b/pkg/pmapi/server_test.go
@ -172,11 +172,11 @@ func checkHeader(h http.Header, field, exp string) error {
 	return nil
 }

-func isAuthReq(r *http.Request, uid, token string) error { // nolint[unparam]
+func isAuthReq(r *http.Request, uid, token string) error { //nolint[unparam] always retrieves testUID
 	if err := checkHeader(r.Header, "x-pm-uid", uid); err != nil {
 		return err
 	}
-	if err := checkHeader(r.Header, "authorization", "Bearer "+token); err != nil {
+	if err := checkHeader(r.Header, "authorization", "Bearer "+token); err != nil { //nolint[revive] can return the error right away but this is easier to read
 		return err
 	}
 	return nil
--- a/pkg/pmapi/tlsreport.go
+++ b/pkg/pmapi/tlsreport.go
@ -33,7 +33,7 @@ import (
 var ErrTLSMismatch = errors.New("no TLS fingerprint match found")

 // TrustedAPIPins contains trusted public keys of the protonmail API and proxies.
-// NOTE: the proxy pins are the same for all proxy servers, guaranteed by infra team ;)
+// NOTE: the proxy pins are the same for all proxy servers, guaranteed by infra team ;).
 var TrustedAPIPins = []string{ // nolint[gochecknoglobals]
 	// api.protonmail.ch
 	`pin-sha256="drtmcR2kFkM8qJClsuWgUzxgBkePfRCkRpqUesyDmeE="`, // current
--- a/pkg/pmapi/users.go
+++ b/pkg/pmapi/users.go
@ -29,7 +29,7 @@ const (
 	PaidAdminRole
 )

-// User status
+// User status.
 const (
 	DeletedUser  = 0
 	DisabledUser = 1
--- a/pkg/srp/hash.go
+++ b/pkg/srp/hash.go
@ -29,12 +29,12 @@ import (
 	"github.com/jameskeane/bcrypt"
 )

-// BCryptHash function bcrypt algorithm to hash password with salt
+// BCryptHash function bcrypt algorithm to hash password with salt.
 func BCryptHash(password string, salt string) (string, error) {
 	return bcrypt.Hash(password, salt)
 }

-// ExpandHash extends the byte data for SRP flow
+// ExpandHash extends the byte data for SRP flow.
 func ExpandHash(data []byte) []byte {
 	part0 := sha512.Sum512(append(data, 0))
 	part1 := sha512.Sum512(append(data, 1))
@ -51,7 +51,7 @@ func ExpandHash(data []byte) []byte {
 // HashPassword returns the hash of password argument. Based on version number
 // following arguments are used in addition to password:
 // * 0, 1, 2: userName and modulus
-// * 3, 4: salt and modulus
+// * 3, 4: salt and modulus.
 func HashPassword(authVersion int, password, userName string, salt, modulus []byte) ([]byte, error) {
 	switch authVersion {
 	case 4, 3:
--- a/pkg/srp/srp.go
+++ b/pkg/srp/srp.go
@ -37,7 +37,7 @@ var (

 // Store random reader in a variable to be able to overwrite it in tests

-// Amored pubkey for modulus verification
+// Amored pubkey for modulus verification.
 const modulusPubkey = `-----BEGIN PGP PUBLIC KEY BLOCK-----

 xjMEXAHLgxYJKwYBBAHaRw8BAQdAFurWXXwjTemqjD7CXjXVyKf0of7n9Ctm
@ -73,12 +73,12 @@ func ReadClearSignedMessage(signedMessage string) (string, error) {
 	return string(modulusBlock.Bytes), nil
 }

-// SrpProofs object
+// SrpProofs object.
 type SrpProofs struct { //nolint[golint]
 	ClientProof, ClientEphemeral, ExpectedServerProof []byte
 }

-// SrpAuth stores byte data for the calculation of SRP proofs
+// SrpAuth stores byte data for the calculation of SRP proofs.
 type SrpAuth struct { //nolint[golint]
 	Modulus, ServerEphemeral, HashedPassword []byte
 }
@ -213,7 +213,7 @@ func (s *SrpAuth) GenerateSrpProofs(length int) (res *SrpProofs, err error) { //
 	return &SrpProofs{ClientEphemeral: fromInt(clientEphemeral), ClientProof: clientProof, ExpectedServerProof: serverProof}, nil
 }

-// GenerateVerifier verifier for update pwds and create accounts
+// GenerateVerifier verifier for update pwds and create accounts.
 func (s *SrpAuth) GenerateVerifier(length int) ([]byte, error) {
 	return nil, errors.New("pm-srp: the client doesn't need SRP GenerateVerifier")
 }
--- a/pkg/tar/tar.go
+++ b/pkg/tar/tar.go
@ -28,10 +28,10 @@ import (
 	"github.com/sirupsen/logrus"
 )

-// maxFileSize limit tre single file size after decopression is not larger than 1GB
+// maxFileSize limit tre single file size after decopression is not larger than 1GB.
 const maxFileSize = int64(1 * 1024 * 1024 * 1024) // 1 GB

-// ErrFileTooLarge returned when decompressed file is too large
+// ErrFileTooLarge returned when decompressed file is too large.
 var ErrFileTooLarge = errors.New("trying to decompress file larger than 1GB")

 type limitReader struct {
@ -40,6 +40,7 @@ type limitReader struct {
 }

 // Read returns error if limit was exceeded. Inspired by io.LimitReader.Read
+// implementation.
 func (lr *limitReader) Read(p []byte) (n int, err error) {
 	if lr.n <= 0 {
 		return 0, ErrFileTooLarge
@ -52,7 +53,7 @@ func (lr *limitReader) Read(p []byte) (n int, err error) {
 	return
 }

-// UntarToDir decopmress and unarchive the files into directory
+// UntarToDir decopmress and unarchive the files into directory.
 func UntarToDir(r io.Reader, dir string) error {
 	tr := tar.NewReader(r)

--- a/test/benchmarks/bench_test.go
+++ b/test/benchmarks/bench_test.go
@ -132,8 +132,8 @@ func BenchmarkIMAPAppleMail(b *testing.B) {
 					`)])`,
 				`UID FETCH ` + newUID + ` (BODYSTRUCTURE BODY.PEEK[HEADER])`,
 				// if email has attachment it is splitted to several fetches
-				//`UID FETCH 133 (BODY.PEEK[3]<0.5877469> BODY.PEEK[1] BODY.PEEK[2])`,
-				//`UID FETCH 133 BODY.PEEK[3]<5877469.2925661>`,
+				//   `UID FETCH 133 (BODY.PEEK[3]<0.5877469> BODY.PEEK[1] BODY.PEEK[2])`,
+				//   `UID FETCH 133 BODY.PEEK[3]<5877469.2925661>`,
 				// here I will just use section download, which is used by AppleMail
 				`UID FETCH ` + newUID + ` BODY.PEEK[1]`,
 				// here I will just use partial download, which is used by AppleMail
--- a/test/context/settings.go
+++ b/test/context/settings.go
@ -43,8 +43,8 @@ func newFakeSettings() *fakeSettings {
 	}

 	// We should use nonstandard ports to not conflict with bridge.
-	s.SetInt(settings.IMAPPortKey, 21100+rand.Intn(100)) //noling[gosec] G404 It is OK to use weak random number generator here
-	s.SetInt(settings.SMTPPortKey, 21200+rand.Intn(100)) //noling[gosec] G404 It is OK to use weak random number generator here
+	s.SetInt(settings.IMAPPortKey, 21100+rand.Intn(100)) //nolint[gosec] G404 It is OK to use weak random number generator here
+	s.SetInt(settings.SMTPPortKey, 21200+rand.Intn(100)) //nolint[gosec] G404 It is OK to use weak random number generator here

 	return s
 }
--- a/test/context/transfer.go
+++ b/test/context/transfer.go
@ -88,7 +88,7 @@ func (ctx *TestContext) GetTransferRemoteIMAPServer() *mocks.IMAPServer {
 		return ctx.transferRemoteIMAPServer
 	}

-	port := 21300 + rand.Intn(100)
+	port := 21300 + rand.Intn(100) //nolint[gosec] It is OK to use weaker rand generator here
 	ctx.transferRemoteIMAPServer = mocks.NewIMAPServer("user", "pass", "127.0.0.1", strconv.Itoa(port))

 	ctx.transferRemoteIMAPServer.Start()
--- a/test/context/users.go
+++ b/test/context/users.go
@ -37,7 +37,7 @@ func (ctx *TestContext) GetUsers() *users.Users {

 // LoginUser logs in the user with the given username, password, and mailbox password.
 func (ctx *TestContext) LoginUser(username, password, mailboxPassword string) (err error) {
-	srp.RandReader = rand.New(rand.NewSource(42))
+	srp.RandReader = rand.New(rand.NewSource(42)) //nolint[gosec] It is OK to use weaker random number generator here

 	client, auth, err := ctx.users.Login(username, password)
 	if err != nil {
@ -120,7 +120,7 @@ func (ctx *TestContext) eventuallySyncIsFinished(store *store.Store) {
 }

 // EventuallySyncIsFinishedForUsername will wait until sync is finished or
-// deadline is reached see eventuallySyncIsFinished for timing
+// deadline is reached see eventuallySyncIsFinished for timing.
 func (ctx *TestContext) EventuallySyncIsFinishedForUsername(username string) {
 	store, err := ctx.GetStore(username)
 	assert.Nil(ctx.t, err)
--- a/test/fakeapi/attachments.go
+++ b/test/fakeapi/attachments.go
@ -47,8 +47,5 @@ func (api *FakePMAPI) CreateAttachment(attachment *pmapi.Attachment, data io.Rea
 }

 func (api *FakePMAPI) DeleteAttachment(attID string) error {
-	if err := api.checkAndRecordCall(DELETE, "/mail/v4/attachments/"+attID, nil); err != nil {
-		return err
-	}
-	return nil
+	return api.checkAndRecordCall(DELETE, "/mail/v4/attachments/"+attID, nil)
 }
--- a/test/users_setup_test.go
+++ b/test/users_setup_test.go
@ -108,7 +108,7 @@ func thereIsNoDatabaseFileForUser(bddUserID string) error {
 	}
 	filePath := ctx.GetDatabaseFilePath(account.UserID())
 	if _, err := os.Stat(filePath); err != nil {
-		return nil
+		return nil //nolint[nilerr] Error means the file is not there or not accessible so test passed
 	}
 	return internalError(os.Remove(filePath), "removing database file of %s", account.Username())
 }