Add the ability to exclude specific separators from the parsing algor…

README.md

@@ -42,6 +42,11 @@ args, err := p.Parse("./foo `echo $SHELL`")
 // args should be ["./foo", "/bin/bash"]
 ```
 
+```go
+p := shellwords.NewParser()
+p.SetExcludeSeparators('\t',';')
+```
+
 # Thanks
 
 This is based on cpan module [Parse::CommandLine](https://metacpan.org/pod/Parse::CommandLine).

shellwords.go

@@ -99,6 +99,7 @@ type Parser struct {
 	ParseBacktick bool
 	Position      int
 	Dir           string
+	excludedSep   []rune
 
 	// If ParseEnv is true, use this for getenv.
 	// If nil, use os.Getenv.
@@ -111,6 +112,7 @@ func NewParser() *Parser {
 		ParseBacktick: ParseBacktick,
 		Position:      0,
 		Dir:           "",
+		excludedSep:   []rune{},
 	}
 }
 
@@ -122,6 +124,27 @@ const (
 	argQuoted
 )
 
+// isExcluded checks if separator should be ignored
+func (p *Parser) isExcluded(r rune) bool {
+	for _, v := range p.excludedSep {
+		if v == r {
+			return true
+		}
+	}
+	return false
+}
+
+// SetExcludeSeparators indictes the parser to ignore provided separators when parsing
+// example: parser.SetExcludeSeparators(';','\t')
+func (p *Parser) SetExcludeSeparators(r ...rune) {
+	p.excludedSep = r
+}
+
+// ExcludedSeparators returns excluded separators
+func (p *Parser) ExcludedSeparators() []rune {
+	return p.excludedSep
+}
+
 func (p *Parser) Parse(line string) ([]string, error) {
 	args := []string{}
 	buf := ""
@@ -157,6 +180,15 @@ loop:
 			continue
 		}
 
+		if p.isExcluded(r) {
+			got = argSingle
+			buf += string(r)
+			if backQuote || dollarQuote {
+				backtick += string(r)
+			}
+			continue
+		}
+
 		if isSpace(r) {
 			if singleQuoted || doubleQuoted || backQuote || dollarQuote {
 				buf += string(r)