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file_move.go
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file_move.go
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/*
* Copyright 1999-2020 Alibaba Group Holding Ltd.
*
* 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 file
import (
"context"
"fmt"
"path"
"github.com/chaosblade-io/chaosblade-spec-go/log"
"github.com/chaosblade-io/chaosblade-spec-go/spec"
"github.com/deepsola/chaosblade-exec-os/exec"
"github.com/deepsola/chaosblade-exec-os/exec/category"
)
const (
MoveFileBin = "chaos_movefile"
suffix = ".chaos-blade-backup"
)
type FileMoveActionSpec struct {
spec.BaseExpActionCommandSpec
}
func NewFileMoveActionSpec() spec.ExpActionCommandSpec {
return &FileMoveActionSpec{
spec.BaseExpActionCommandSpec{
ActionMatchers: fileCommFlags,
ActionFlags: []spec.ExpFlagSpec{
&spec.ExpFlag{
Name: "target",
Desc: "target folder",
Required: true,
},
&spec.ExpFlag{
Name: "force",
Desc: "use --force flag overwrite target file",
NoArgs: true,
},
&spec.ExpFlag{
Name: "auto-create-dir",
Desc: "automatically creates a directory that does not exist",
NoArgs: true,
},
},
ActionExecutor: &FileMoveActionExecutor{},
ActionExample: `
# Move the file /home/logs/nginx.log to /tmp
blade create file move --filepath /home/logs/nginx.log --target /tmp
# Force Move the file /home/logs/nginx.log to /temp
blade create file move --filepath /home/logs/nginx.log --target /tmp --force
# Move the file /home/logs/nginx.log to /temp/ and automatically create directories that don't exist
blade create file move --filepath /home/logs/nginx.log --target /temp --auto-create-dir
`,
ActionPrograms: []string{MoveFileBin},
ActionCategories: []string{category.SystemFile},
},
}
}
func (*FileMoveActionSpec) Name() string {
return "move"
}
func (*FileMoveActionSpec) Aliases() []string {
return []string{}
}
func (*FileMoveActionSpec) ShortDesc() string {
return "File move"
}
func (f *FileMoveActionSpec) LongDesc() string {
return "File move"
}
type FileMoveActionExecutor struct {
channel spec.Channel
}
func (*FileMoveActionExecutor) Name() string {
return "move"
}
func (f *FileMoveActionExecutor) Exec(uid string, ctx context.Context, model *spec.ExpModel) *spec.Response {
commands := []string{"mv", "mkdir"}
if response, ok := f.channel.IsAllCommandsAvailable(ctx, commands); !ok {
return response
}
filepath := model.ActionFlags["filepath"]
target := model.ActionFlags["target"]
if _, ok := spec.IsDestroy(ctx); ok {
return f.stop(filepath, target, ctx)
}
force := model.ActionFlags["force"] == "true"
autoCreateDir := model.ActionFlags["auto-create-dir"] == "true"
if !force {
targetFile := path.Join(target, "/", path.Base(filepath))
if exec.CheckFilepathExists(ctx, f.channel, targetFile) {
log.Errorf(ctx, "`%s`: target file already exists", targetFile)
return spec.ResponseFailWithFlags(spec.ParameterInvalid, "target", targetFile, "the target file already exists")
}
}
return f.start(filepath, target, force, autoCreateDir, ctx)
}
func (f *FileMoveActionExecutor) start(filepath, target string, force, autoCreateDir bool, ctx context.Context) *spec.Response {
var response *spec.Response
if autoCreateDir && !exec.CheckFilepathExists(ctx, f.channel, target) {
response = f.channel.Run(ctx, "mkdir", fmt.Sprintf(`-p %s`, target))
if !response.Success {
return response
}
}
if force {
// backup
_ = f.channel.Run(ctx, "cp", fmt.Sprintf(`"%s" "%s"`, path.Join(target, path.Base(filepath)),
path.Join(target, path.Base(filepath)+suffix)))
response = f.channel.Run(ctx, "mv", fmt.Sprintf(`-f "%s" "%s"`, filepath, target))
} else {
response = f.channel.Run(ctx, "mv", fmt.Sprintf(`"%s" "%s"`, filepath, target))
}
return response
}
func (f *FileMoveActionExecutor) stop(filepath, target string, ctx context.Context) *spec.Response {
origin := path.Join(target, "/", path.Base(filepath))
response := f.channel.Run(ctx, "mv", fmt.Sprintf(`-f "%s" "%s"`, origin, path.Dir(filepath)))
if response.Success {
// restore backup
_ = f.channel.Run(ctx, "mv", fmt.Sprintf(`"%s" "%s"`, path.Join(target, path.Base(filepath)+suffix),
path.Join(target, path.Base(filepath))))
}
return response
}
func (f *FileMoveActionExecutor) SetChannel(channel spec.Channel) {
f.channel = channel
}