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script_exit.go
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script_exit.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 script
import (
"context"
"fmt"
"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"
)
type ScriptExitActionCommand struct {
spec.BaseExpActionCommandSpec
}
func NewScriptExitActionCommand() spec.ExpActionCommandSpec {
return &ScriptExitActionCommand{
spec.BaseExpActionCommandSpec{
ActionMatchers: []spec.ExpFlagSpec{},
ActionFlags: []spec.ExpFlagSpec{
&spec.ExpFlag{
Name: "exit-code",
Desc: "Exit code",
Required: false,
},
&spec.ExpFlag{
Name: "exit-message",
Desc: "Exit message",
Required: false,
},
},
ActionExecutor: &ScriptExitExecutor{},
ActionExample: `
# Add commands to the script "start0() { echo this-is-error-message; exit 1; ... }"
blade create script exit --exit-code 1 --exit-message this-is-error-message --file test.sh --function-name start0`,
ActionCategories: []string{category.SystemScript},
},
}
}
func (*ScriptExitActionCommand) Name() string {
return "exit"
}
func (*ScriptExitActionCommand) Aliases() []string {
return []string{}
}
func (*ScriptExitActionCommand) ShortDesc() string {
return "Exit script"
}
func (s *ScriptExitActionCommand) LongDesc() string {
if s.ActionLongDesc != "" {
return s.ActionLongDesc
}
return "Exit script with specify message and code"
}
type ScriptExitExecutor struct {
channel spec.Channel
}
func (*ScriptExitExecutor) Name() string {
return "exit"
}
func (see *ScriptExitExecutor) Exec(uid string, ctx context.Context, model *spec.ExpModel) *spec.Response {
commands := []string{"cat", "rm", "sed", "awk", "rm"}
if response, ok := see.channel.IsAllCommandsAvailable(ctx, commands); !ok {
return response
}
scriptFile := model.ActionFlags["file"]
if scriptFile == "" {
log.Errorf(ctx, "file is nil")
return spec.ResponseFailWithFlags(spec.ParameterLess, "file")
}
if !exec.CheckFilepathExists(ctx, see.channel, scriptFile) {
log.Errorf(ctx, "`%s`, file is invalid. it not found", scriptFile)
return spec.ResponseFailWithFlags(spec.ParameterIllegal, "file", scriptFile, "the file is not found")
}
if _, ok := spec.IsDestroy(ctx); ok {
return see.stop(ctx, scriptFile)
}
functionName := model.ActionFlags["function-name"]
if functionName == "" {
log.Errorf(ctx, "function-name is nil")
return spec.ResponseFailWithFlags(spec.ParameterLess, "function-name")
}
exitMessage := model.ActionFlags["exit-message"]
exitCode := model.ActionFlags["exit-code"]
return see.start(ctx, scriptFile, functionName, exitMessage, exitCode)
}
func (see *ScriptExitExecutor) start(ctx context.Context, scriptFile, functionName, exitMessage, exitCode string) *spec.Response {
var content string
if exitMessage != "" {
content = fmt.Sprintf(`echo "%s";`, exitMessage)
}
if exitCode == "" {
exitCode = "1"
}
content = fmt.Sprintf("%sexit %s", content, exitCode)
// backup file
response := backScript(ctx, see.channel, scriptFile)
if !response.Success {
return response
}
response = insertContentToScriptBy(ctx, see.channel, functionName, content, scriptFile)
if !response.Success {
see.stop(ctx, scriptFile)
}
return response
}
func (see *ScriptExitExecutor) stop(ctx context.Context, scriptFile string) *spec.Response {
return recoverScript(ctx, see.channel, scriptFile)
}
func (see *ScriptExitExecutor) SetChannel(channel spec.Channel) {
see.channel = channel
}