Merge pull request #287 from compose-spec/add-nakedret-linter

Add "nakedret" to the linters to put dotenv in conformity

Author: ulyssessouza

dotenv/godotenv.go

@@ -62,7 +62,7 @@ func ParseWithLookup(r io.Reader, lookupFn LookupFn) (map[string]string, error)
 //		godotenv.Load("fileone", "filetwo")
 //
 // It's important to note that it WILL NOT OVERRIDE an env variable that already exists - consider the .env file to set dev vars or sensible defaults
-func Load(filenames ...string) (err error) {
+func Load(filenames ...string) error {
 	return load(false, filenames...)
 }
 
@@ -77,20 +77,19 @@ func Load(filenames ...string) (err error) {
 //		godotenv.Overload("fileone", "filetwo")
 //
 // It's important to note this WILL OVERRIDE an env variable that already exists - consider the .env file to forcefilly set all vars.
-func Overload(filenames ...string) (err error) {
+func Overload(filenames ...string) error {
 	return load(true, filenames...)
 }
 
-func load(overload bool, filenames ...string) (err error) {
+func load(overload bool, filenames ...string) error {
 	filenames = filenamesOrDefault(filenames)
-
 	for _, filename := range filenames {
-		err = loadFile(filename, overload)
+		err := loadFile(filename, overload)
 		if err != nil {
-			return // return early on a spazout
+			return err
 		}
 	}
-	return
+	return nil
 }
 
 var startsWithDigitRegex = regexp.MustCompile(`^\s*\d.*`) // Keys starting with numbers are ignored
@@ -121,12 +120,12 @@ func ReadWithLookup(lookupFn LookupFn, filenames ...string) (map[string]string,
 
 // Read all env (with same file loading semantics as Load) but return values as
 // a map rather than automatically writing values into env
-func Read(filenames ...string) (envMap map[string]string, err error) {
+func Read(filenames ...string) (map[string]string, error) {
 	return ReadWithLookup(nil, filenames...)
 }
 
 // Unmarshal reads an env file from a string, returning a map of keys and values.
-func Unmarshal(str string) (envMap map[string]string, err error) {
+func Unmarshal(str string) (map[string]string, error) {
 	return UnmarshalBytes([]byte(str))
 }
 
@@ -223,10 +222,10 @@ func loadFile(filename string, overload bool) error {
 	return nil
 }
 
-func readFile(filename string, lookupFn LookupFn) (envMap map[string]string, err error) {
+func readFile(filename string, lookupFn LookupFn) (map[string]string, error) {
 	file, err := os.Open(filename)
 	if err != nil {
-		return
+		return nil, err
 	}
 	defer file.Close()
 
@@ -235,7 +234,7 @@ func readFile(filename string, lookupFn LookupFn) (envMap map[string]string, err
 
 var exportRegex = regexp.MustCompile(`^\s*(?:export\s+)?(.*?)\s*$`)
 
-func parseLine(line string, envMap map[string]string) (key string, value string, err error) {
+func parseLine(line string, envMap map[string]string) (string, string, error) {
 	return parseLineWithLookup(line, envMap, nil)
 }
 func parseLineWithLookup(line string, envMap map[string]string, lookupFn LookupFn) (string, string, error) {

dotenv/parser.go

@@ -81,7 +81,9 @@ func getStatementStart(src []byte) []byte {
 }
 
 // locateKeyName locates and parses key name and returns rest of slice
-func locateKeyName(src []byte) (key string, cutset []byte, inherited bool, err error) {
+func locateKeyName(src []byte) (string, []byte, bool, error) {
+	var key string
+	var inherited bool
 	// trim "export" and space at beginning
 	src = bytes.TrimLeftFunc(bytes.TrimPrefix(src, []byte(exportPrefix)), isSpace)
 
@@ -120,7 +122,7 @@ loop:
 
 	// trim whitespace
 	key = strings.TrimRightFunc(key, unicode.IsSpace)
-	cutset = bytes.TrimLeftFunc(src[offset:], isSpace)
+	cutset := bytes.TrimLeftFunc(src[offset:], isSpace)
 	return key, cutset, inherited, nil
 }
 
@@ -208,14 +210,14 @@ func indexOfNonSpaceChar(src []byte) int {
 }
 
 // hasQuotePrefix reports whether charset starts with single or double quote and returns quote character
-func hasQuotePrefix(src []byte) (quote byte, isQuoted bool) {
+func hasQuotePrefix(src []byte) (byte, bool) {
 	if len(src) == 0 {
 		return 0, false
 	}
 
-	switch prefix := src[0]; prefix {
+	switch quote := src[0]; quote {
 	case prefixDoubleQuote, prefixSingleQuote:
-		return prefix, true
+		return quote, true // isQuoted
 	default:
 		return 0, false
 	}

golangci.yml

@@ -11,6 +11,7 @@ linters:
   - gosimple
   - ineffassign
   - misspell
+  - nakedret
   - govet
 linters-settings:
   gocritic:
@@ -23,4 +24,4 @@ linters-settings:
     disabled-checks:
       - paramTypeCombine
       - unnamedResult
-      - whyNoLint
+      - whyNoLint