init: basic tools

input_scv.go

@@ -0,0 +1,36 @@
+package script
+
+import (
+	"context"
+	"encoding/csv"
+	"os"
+)
+
+// CSV creates csv.Reader reading from filename.
+func NewCSVReader(filename string) (*CSVReader, error) {
+	return newCSVreader(filename)
+}
+
+type CSVReader struct {
+	f   *os.File
+	rdr *csv.Reader
+}
+
+func (c *CSVReader) Read(context.Context) ([]string, error) {
+	return c.rdr.Read()
+}
+
+func (c *CSVReader) Close() error {
+	return c.f.Close()
+}
+
+func newCSVreader(name string) (*CSVReader, error) {
+	f, err := os.Open(name)
+	if err != nil {
+		return nil, err
+	}
+
+	csvr := csv.NewReader(f)
+
+	return &CSVReader{f: f, rdr: csvr}, nil
+}