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executor.go
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executor.go
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package common
import (
"context"
"errors"
"fmt"
log "github.com/sirupsen/logrus"
)
type ExecutorData interface{}
type ExecutorCommand struct {
Script string
Stage BuildStage
Predefined bool
Context context.Context
}
type ExecutorStage string
const (
ExecutorStageCreated ExecutorStage = "created"
ExecutorStagePrepare ExecutorStage = "prepare"
ExecutorStageFinish ExecutorStage = "finish"
ExecutorStageCleanup ExecutorStage = "cleanup"
)
type ExecutorPrepareOptions struct {
Config *RunnerConfig
Build *Build
Trace JobTrace
User string
Context context.Context
}
type Executor interface {
Shell() *ShellScriptInfo
Prepare(options ExecutorPrepareOptions) error
Run(cmd ExecutorCommand) error
Finish(err error)
Cleanup()
GetCurrentStage() ExecutorStage
SetCurrentStage(stage ExecutorStage)
}
type ExecutorProvider interface {
CanCreate() bool
Create() Executor
Acquire(config *RunnerConfig) (ExecutorData, error)
Release(config *RunnerConfig, data ExecutorData) error
GetFeatures(features *FeaturesInfo) error
GetDefaultShell() string
}
type BuildError struct {
Inner error
FailureReason JobFailureReason
}
func (b *BuildError) Error() string {
if b.Inner == nil {
return "error"
}
return b.Inner.Error()
}
var executors map[string]ExecutorProvider
func validateExecutorProvider(provider ExecutorProvider) error {
if provider.GetDefaultShell() == "" {
return errors.New("default shell not implemented")
}
if !provider.CanCreate() {
return errors.New("cannot create executor")
}
if err := provider.GetFeatures(&FeaturesInfo{}); err != nil {
return fmt.Errorf("cannot get features: %v", err)
}
return nil
}
func RegisterExecutor(executor string, provider ExecutorProvider) {
log.Debugln("Registering", executor, "executor...")
if err := validateExecutorProvider(provider); err != nil {
panic("Executor cannot be registered: " + err.Error())
}
if executors == nil {
executors = make(map[string]ExecutorProvider)
}
if _, ok := executors[executor]; ok {
panic("Executor already exist: " + executor)
}
executors[executor] = provider
}
func GetExecutor(executor string) ExecutorProvider {
if executors == nil {
return nil
}
provider, _ := executors[executor]
return provider
}
func GetExecutors() []string {
names := []string{}
if executors != nil {
for name := range executors {
names = append(names, name)
}
}
return names
}
func GetExecutorProviders() (providers []ExecutorProvider) {
if executors != nil {
for _, executorProvider := range executors {
providers = append(providers, executorProvider)
}
}
return
}
func NewExecutor(executor string) Executor {
provider := GetExecutor(executor)
if provider != nil {
return provider.Create()
}
return nil
}