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cmd_add.go
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/
cmd_add.go
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package main
import (
"errors"
"strings"
)
type addCmd struct {
_ struct{} `help:"add an entry with args: {IP} {Host} [Comment] "`
IP, Host, Comment string
}
func (c addCmd) Run(args []string, g globalCmd) error {
err := c.feed(args)
if err != nil {
return err
}
el, err := readEntries(g.Hosts)
if err != nil {
return err
}
el = c.addTo(el)
return writeEntries(g.Hosts, el)
}
func (c *addCmd) feed(args []string) error {
idx := 0
if c.IP == "" {
if len(args) < idx+1 {
return errors.New("no IP")
}
c.IP = args[idx]
idx++
}
if c.Host == "" {
if len(args) < idx+1 {
return errors.New("no Host")
}
c.Host = args[idx]
idx++
}
if c.Comment == "" {
if len(args) < idx+1 {
//noerror
//return errors.New("no Comment")
} else {
c.Comment = strings.Join(args[idx:], " ")
}
}
return nil
}
func (c addCmd) addTo(el []entry) []entry {
found := false
for i := range el {
e := el[i]
if e.Type == hostEntry && (e.IP == c.IP || e.Host == c.Host) {
el[i].IP = c.IP
el[i].Host = c.Host
el[i].Comment = c.Comment
el[i].Enabled = true
found = true
break
}
}
if !found {
el = append(el, entry{
Type: hostEntry,
IP: c.IP,
Host: c.Host,
Comment: c.Comment,
Enabled: true,
})
}
return el
}