coredns/plugin/chaos/setup.go
Miek Gieben 004c5fca9d
all: simply registering plugins (#3287)
Abstract the caddy call and make it simpler.

See #3261 for some part of the discussion.

Go from:

~~~ go
func init() {
       caddy.RegisterPlugin("any", caddy.Plugin{
               ServerType: "dns",
               Action:     setup,
       })
}
~~~

To:

~~~ go
func init() { plugin.Register("any", setup) }
~~~

This requires some external documents in coredns.io to be updated as
well; the old way still works, so it's backwards compatible.

Signed-off-by: Miek Gieben <miek@miek.nl>
2019-09-20 08:02:30 +01:00

67 lines
1.3 KiB
Go

//go:generate go run owners_generate.go
package chaos
import (
"sort"
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
"github.com/caddyserver/caddy"
)
func init() { plugin.Register("chaos", setup) }
func setup(c *caddy.Controller) error {
version, authors, err := parse(c)
if err != nil {
return plugin.Error("chaos", err)
}
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
return Chaos{Next: next, Version: version, Authors: authors}
})
return nil
}
func parse(c *caddy.Controller) (string, []string, error) {
// Set here so we pick up AppName and AppVersion that get set in coremain's init().
chaosVersion = caddy.AppName + "-" + caddy.AppVersion
version := ""
for c.Next() {
args := c.RemainingArgs()
if len(args) == 0 {
return trim(chaosVersion), Owners, nil
}
if len(args) == 1 {
return trim(args[0]), Owners, nil
}
version = args[0]
authors := make(map[string]struct{})
for _, a := range args[1:] {
authors[a] = struct{}{}
}
list := []string{}
for k := range authors {
k = trim(k) // limit size to 255 chars
list = append(list, k)
}
sort.Strings(list)
return version, list, nil
}
return version, Owners, nil
}
func trim(s string) string {
if len(s) < 256 {
return s
}
return s[:255]
}
var chaosVersion string