go generate代码自动生成指南

go generate ./...

// go:generate go run generate_constants.go
package main
// go generate生成的常量
const (
    Monday = iota + 1
    Tuesday
    Wednesday
    Thursday
    Friday
    Saturday
    Sunday
)

    Tuesday
    Wednesday
    Thursday
    Friday
    Saturday
    Sunday
)
`
  // 创建或覆盖constants.go文件
  file, err := os.Create("constants.go")
  if err != nil {
    fmt.Println("Error creating constants.go file:", err)
    return
  }
  defer file.Close()
  // 将生成的代码写入文件
  _, err = file.WriteString(constantsTemplate)
  if err != nil {
    fmt.Println("Error writing to constants.go file:", err)
    return
  }
  fmt.Println("Constants generated successfully.")
}

go generate ./...

// go:generate go run generate_data.go
package main
func main() {
    // Main code
}

package main
import (
  "fmt"
  "os"
)
func main() {
  data := "Generated data for the application."
  // 创建或覆盖data.txt文件
  file, err := os.Create("data.txt")
  if err != nil {
    fmt.Println("Error creating data.txt file:", err)
    return
  }
  defer file.Close()
  // 将生成的数据写入文件
  _, err = file.WriteString(data)
  if err != nil {
    fmt.Println("Error writing to data.txt file:", err)
    return
  }
  fmt.Println("Data generated successfully.")
}

go generate ./...

// 生成go文档
package main
func main() {
    // Main code
}

go generate ./...

// go:generate go run generate_queries.go
package main
type User struct {
    ID   int
    Name string
}
type Product struct {
    ID    int
    Name  string
    Price float64
}

package main
import (
  "fmt"
  "os"
  "text/template"
)
func main() {
queriesTemplate 
:= `// Code generated by go generate; DO NOT EDIT.
package main
import "database/sql"
// 以主键ID查询
func (u *User) QueryByID(db *sql.DB) error {
    // Implementation of the query logic
    return nil
}
// 按名称查询
func (u *User) QueryByName(db *sql.DB) error {
    // Implementation of the query logic
    return nil
}
// 按 ID 查询产品
func (p *Product) QueryByID(db *sql.DB) error {
    // Implementation of the query logic
    return nil
}
// 以名称查询产品
func (p *Product) QueryByName(db *sql.DB) error {
    // Implementation of the query logic
    return nil
}
`
  // 创建或覆盖queries.go文件
  file, err := os.Create("queries.go")
  if err != nil {
    fmt.Println("Error creating queries.go file:", err)
    return
  }
  defer file.Close()
  // 将生成的代码写入文件
  _, err = file.WriteString(queriesTemplate)
  if err != nil {
    fmt.Println("Error writing to queries.go file:", err)
    return
  }
  fmt.Println("Queries generated successfully.")
}

go generate ./...