init: basic tools

input_stdin.go

@@ -0,0 +1,37 @@
+package script
+
+import (
+	"bufio"
+	"context"
+	"io"
+	"os"
+	"strings"
+)
+
+// StdinReader reads from stdin
+type StdinReader struct {
+	scanner bufio.Scanner
+}
+
+func NewStdinReader() *StdinReader {
+	return &StdinReader{
+		scanner: *bufio.NewScanner(os.Stdin),
+	}
+}
+
+// Read reads from stdin until \n character
+// then splits result at "," separator and returns
+// the resulting slice.
+// It returns EOF when nothing left to read.
+func (s *StdinReader) Read(_ context.Context) ([]string, error) {
+	if !s.scanner.Scan() {
+		err := s.scanner.Err()
+		if err == nil {
+			return nil, io.EOF
+		}
+
+		return nil, err
+	}
+
+	return strings.Split(s.scanner.Text(), ","), nil
+}