130 lines
3.0 KiB
Go
130 lines
3.0 KiB
Go
// Copyright 2016 CNI authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
/*
|
|
Noop plugin is a CNI plugin designed for use as a test-double.
|
|
|
|
When calling, set the CNI_ARGS env var equal to the path of a file containing
|
|
the JSON encoding of a Debug.
|
|
*/
|
|
|
|
package main
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
|
|
"github.com/containernetworking/cni/pkg/skel"
|
|
"github.com/containernetworking/cni/pkg/version"
|
|
noop_debug "github.com/containernetworking/cni/plugins/test/noop/debug"
|
|
)
|
|
|
|
// parse extra args i.e. FOO=BAR;ABC=123
|
|
func parseExtraArgs(args string) (map[string]string, error) {
|
|
m := make(map[string]string)
|
|
|
|
items := strings.Split(args, ";")
|
|
for _, item := range items {
|
|
kv := strings.Split(item, "=")
|
|
if len(kv) != 2 {
|
|
return nil, fmt.Errorf("CNI_ARGS invalid key/value pair: %s\n", kv)
|
|
}
|
|
m[kv[0]] = kv[1]
|
|
}
|
|
return m, nil
|
|
}
|
|
|
|
func debugBehavior(args *skel.CmdArgs, command string) error {
|
|
extraArgs, err := parseExtraArgs(args.Args)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
debugFilePath, ok := extraArgs["DEBUG"]
|
|
if !ok {
|
|
fmt.Printf(`{}`)
|
|
os.Stderr.WriteString("CNI_ARGS empty, no debug behavior\n")
|
|
return nil
|
|
}
|
|
|
|
debug, err := noop_debug.ReadDebug(debugFilePath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
debug.CmdArgs = *args
|
|
debug.Command = command
|
|
|
|
if debug.ReportResult == "" {
|
|
debug.ReportResult = fmt.Sprintf(` { "result": %q }`, noop_debug.EmptyReportResultMessage)
|
|
}
|
|
|
|
err = debug.WriteDebug(debugFilePath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
os.Stderr.WriteString(debug.ReportStderr)
|
|
|
|
if debug.ReportError != "" {
|
|
return errors.New(debug.ReportError)
|
|
} else {
|
|
os.Stdout.WriteString(debug.ReportResult)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func debugGetSupportedVersions() []string {
|
|
vers := []string{"0.-42.0", "0.1.0", "0.2.0"}
|
|
cniArgs := os.Getenv("CNI_ARGS")
|
|
if cniArgs == "" {
|
|
return vers
|
|
}
|
|
|
|
extraArgs, err := parseExtraArgs(cniArgs)
|
|
if err != nil {
|
|
panic("test setup error: invalid CNI_ARGS format")
|
|
}
|
|
|
|
debugFilePath, ok := extraArgs["DEBUG"]
|
|
if !ok {
|
|
panic("test setup error: missing DEBUG in CNI_ARGS")
|
|
}
|
|
|
|
debug, err := noop_debug.ReadDebug(debugFilePath)
|
|
if err != nil {
|
|
panic("test setup error: unable to read debug file: " + err.Error())
|
|
}
|
|
if debug.ReportVersionSupport == nil {
|
|
return vers
|
|
}
|
|
return debug.ReportVersionSupport
|
|
}
|
|
|
|
func cmdAdd(args *skel.CmdArgs) error {
|
|
return debugBehavior(args, "ADD")
|
|
}
|
|
|
|
func cmdDel(args *skel.CmdArgs) error {
|
|
return debugBehavior(args, "DEL")
|
|
}
|
|
|
|
func main() {
|
|
supportedVersions := debugGetSupportedVersions()
|
|
skel.PluginMain(cmdAdd, cmdDel, version.PluginSupports(supportedVersions...))
|
|
}
|