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package fs
import (
"bytes"
"encoding/csv"
"fmt"
)
// CommaSepList is a comma separated config value
// It uses the encoding/csv rules for quoting and escaping
type CommaSepList []string
// SpaceSepList is a space separated config value
// It uses the encoding/csv rules for quoting and escaping
type SpaceSepList []string
type genericList []string
func (l CommaSepList) String() string {
return genericList(l).string(',')
}
// Set the List entries
func (l *CommaSepList) Set(s string) error {
return (*genericList)(l).set(',', []byte(s))
}
// Type of the value
func (CommaSepList) Type() string {
return "CommaSepList"
}
// Scan implements the fmt.Scanner interface
func (l *CommaSepList) Scan(s fmt.ScanState, ch rune) error {
return (*genericList)(l).scan(',', s, ch)
}
func (l SpaceSepList) String() string {
return genericList(l).string(' ')
}
// Set the List entries
func (l *SpaceSepList) Set(s string) error {
return (*genericList)(l).set(' ', []byte(s))
}
// Type of the value
func (SpaceSepList) Type() string {
return "SpaceSepList"
}
// Scan implements the fmt.Scanner interface
func (l *SpaceSepList) Scan(s fmt.ScanState, ch rune) error {
return (*genericList)(l).scan(' ', s, ch)
}
func (gl genericList) string(sep rune) string {
var buf bytes.Buffer
w := csv.NewWriter(&buf)
w.Comma = sep
err := w.Write(gl)
if err != nil {
// can only happen if w.Comma is invalid
panic(err)
}
w.Flush()
return string(bytes.TrimSpace(buf.Bytes()))
}
func (gl *genericList) set(sep rune, b []byte) error {
if len(b) == 0 {
*gl = nil
return nil
}
r := csv.NewReader(bytes.NewReader(b))
r.Comma = sep
record, err := r.Read()
switch _err := err.(type) {
case nil:
*gl = record
case *csv.ParseError:
err = _err.Err // remove line numbers from the error message
}
return err
}
func (gl *genericList) scan(sep rune, s fmt.ScanState, ch rune) error {
token, err := s.Token(true, func(rune) bool { return true })
if err != nil {
return err
}
return gl.set(sep, bytes.TrimSpace(token))
}
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