/
mapper.go
70 lines (61 loc) · 1.35 KB
/
mapper.go
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// Copyright(C) 2021 github.com/fsgo All Rights Reserved.
// Author: fsgo
// Date: 2021/6/30
package tasks
import (
"context"
"errors"
"flag"
"fmt"
"os"
)
var ErrTaskNotFound = errors.New("task not found")
type Mapper struct {
tasks map[string]Task
}
// Register 注册
func (m *Mapper) Register(task Task) error {
if m.tasks == nil {
m.tasks = map[string]Task{}
}
if _, has := m.tasks[task.Name()]; has {
return fmt.Errorf("task.Name=%q already exists", task.Name())
}
m.tasks[task.Name()] = task
return nil
}
func (m *Mapper) Find(name string) Task {
if len(m.tasks) == 0 {
return nil
}
return m.tasks[name]
}
func (m *Mapper) Run(ctx context.Context, name string) error {
task := m.Find(name)
if task == nil {
return fmt.Errorf("%w, name=%q", ErrTaskNotFound, name)
}
return Run(ctx, task)
}
func (m *Mapper) Execute(ctx context.Context) error {
var name string
fs := flag.NewFlagSet(os.Args[0], flag.PanicOnError)
fs.StringVar(&name, "name", "", "task name")
var help bool
fs.BoolVar(&help, "help", false, "help")
if len(os.Args) < 3 {
fs.PrintDefaults()
return errors.New("os.Args too short")
}
if err := fs.Parse(os.Args[1:3]); err != nil {
return err
}
if len(name) == 0 {
fs.PrintDefaults()
return errors.New("-name is empty")
}
return m.Run(ctx, name)
}
func (m *Mapper) Tasks() map[string]Task {
return m.tasks
}