任务

原文：https://gobuffalo.io/documentation/guides/tasks/

Tasks 任务

Tasks are small scripts that are often needed when writing an application. These tasks might be along the lines of seeding a database, parsing a log file, or even a release script. Buffalo uses the grift package to make writing these tasks simple.

​ 任务通常是在编写应用程序时经常需要的脚本。这些任务可能包括填充数据库、解析日志文件，甚至发布脚本。Buffalo 使用 grift 包来简化编写这些任务。

Writing Tasks 编写任务

Tasks must all be in the grifts package. A simple task would look like following:

​ 所有任务都必须在 grifts 包中。一个简单的任务如下所示：

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var _ = grift.Add("hello", func(c *grift.Context) error {
  fmt.Println("Hello!")
  return nil
})

Tasks Generator 任务生成器

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$ buffalo g task foo:bar

--> grifts/bar.go
// grifts/bar.go
package grifts

import (
  . "github.com/gobuffalo/grift/grift"
)

var _ = Namespace("foo", func() {

  Desc("bar", "TODO")
  Add("bar", func(c *Context) error {
    return nil
  })

})

Listing Available Tasks 列出可用任务

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$ buffalo task list

Available grifts
================
buffalo task db:seed       # Seeds a database
buffalo task middleware    # Prints out your middleware stack
buffalo task routes        # Print out all defined routes
buffalo task secret        # Generate a cryptographically secure secret key

Running Tasks 运行任务

Development 开发

Tasks can be run in development using the buffalo task command.

​ 可以使用 buffalo task 命令在开发中运行任务。

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$ buffalo task hello

From a Built Binary 从已构建的二进制文件

After a binary has been built, the tasks can be run with the task subcommand:

​ 构建二进制文件后，可以使用 task 子命令运行任务：

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$ myapp task hello