mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-04 12:10:20 +00:00
75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
|
/*
|
||
|
|
Copyright 2017 The Kubernetes 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package plugins
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"os"
|
||
|
|
"os/exec"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/golang/glog"
|
||
|
|
)
|
||
|
|
|
||
|
|
// PluginRunner is capable of running a plugin in a given running context.
|
||
|
|
type PluginRunner interface {
|
||
|
|
Run(plugin *Plugin, ctx RunningContext) error
|
||
|
|
}
|
||
|
|
|
||
|
|
// RunningContext holds the context in which a given plugin is running - the
|
||
|
|
// in, out, and err streams, arguments and environment passed to it, and the
|
||
|
|
// working directory.
|
||
|
|
type RunningContext struct {
|
||
|
|
In io.Reader
|
||
|
|
Out io.Writer
|
||
|
|
ErrOut io.Writer
|
||
|
|
Args []string
|
||
|
|
EnvProvider EnvProvider
|
||
|
|
WorkingDir string
|
||
|
|
}
|
||
|
|
|
||
|
|
// ExecPluginRunner is a PluginRunner that uses Go's os/exec to run plugins.
|
||
|
|
type ExecPluginRunner struct{}
|
||
|
|
|
||
|
|
// Run takes a given plugin and runs it in a given context using os/exec, returning
|
||
|
|
// any error found while running.
|
||
|
|
func (r *ExecPluginRunner) Run(plugin *Plugin, ctx RunningContext) error {
|
||
|
|
command := strings.Split(os.ExpandEnv(plugin.Command), " ")
|
||
|
|
base := command[0]
|
||
|
|
args := []string{}
|
||
|
|
if len(command) > 1 {
|
||
|
|
args = command[1:]
|
||
|
|
}
|
||
|
|
args = append(args, ctx.Args...)
|
||
|
|
|
||
|
|
cmd := exec.Command(base, args...)
|
||
|
|
|
||
|
|
cmd.Stdin = ctx.In
|
||
|
|
cmd.Stdout = ctx.Out
|
||
|
|
cmd.Stderr = ctx.ErrOut
|
||
|
|
|
||
|
|
env, err := ctx.EnvProvider.Env()
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
cmd.Env = env.Slice()
|
||
|
|
cmd.Dir = ctx.WorkingDir
|
||
|
|
|
||
|
|
glog.V(9).Infof("Running plugin %q as base command %q with args %v", plugin.Name, base, args)
|
||
|
|
return cmd.Run()
|
||
|
|
}
|