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|
package main
import (
"errors"
"fmt"
"go/ast"
"go/parser"
"go/token"
"io/ioutil"
"os"
"os/exec"
"strings"
"text/template"
"time"
)
var bodyTmpl = `package {{.PackageName}}
import (
{{range $import := .Imports}} {{$import}}
{{end}}
)
/*
This file is generated automatically by go generate. Do not edit.
*/
// Changed
func (o *{{.StructName}}) Changed(fieldName string) bool {
return util.Changed(o, fieldName)
}
// ToParams
func (o *{{.StructName}}) ToParams() (url.Values, error) {
return util.ToParams(o)
}
{{range $field := .Fields}}
// With{{.Name}}
func(o *{{$field.StructName}}) With{{$field.Name}}(value {{$field.Type}}) *{{$field.StructName}} {
v := {{$field.TypedValue}}
o.{{$field.Name}} = v
return o
}
// Get{{.Name}}
func(o *{{$field.StructName}}) Get{{$field.Name}}() {{$field.Type}} {
var {{$field.ZeroName}} {{$field.Type}}
if o.{{$field.Name}} == nil {
return {{$field.ZeroName}}
}
return {{$field.TypedName}}
}
{{end}}
`
type fieldStruct struct {
Name string
StructName string
Type string
TypedName string
TypedValue string
ZeroName string
}
func main() {
var (
closed bool
fieldStructs []fieldStruct
)
srcFile := os.Getenv("GOFILE")
pkg := os.Getenv("GOPACKAGE")
inputStructName := os.Args[1]
b, err := ioutil.ReadFile(srcFile)
if err != nil {
panic(err)
}
fset := token.NewFileSet() // positions are relative to fset
f, err := parser.ParseFile(fset, "", b, parser.ParseComments)
if err != nil {
panic(err)
}
// always add reflect
imports := []string{"\"reflect\"", "\"github.com/containers/podman/v3/pkg/bindings/util\""}
for _, imp := range f.Imports {
imports = append(imports, imp.Path.Value)
}
out, err := os.Create(strings.TrimRight(srcFile, ".go") + "_" + strings.Replace(strings.ToLower(inputStructName), "options", "_options", 1) + ".go")
if err != nil {
panic(err)
}
defer func() {
if !closed {
out.Close()
}
}()
ast.Inspect(f, func(n ast.Node) bool {
ref, refOK := n.(*ast.TypeSpec)
if refOK {
if ref.Name.Name == inputStructName {
x := ref.Type.(*ast.StructType)
for _, field := range x.Fields.List {
var (
name, zeroName, typedName, typedValue string
)
if len(field.Names) > 0 {
name = field.Names[0].Name
if len(name) < 1 {
panic(errors.New("bad name"))
}
}
for k, v := range name {
zeroName = strings.ToLower(string(v)) + name[k+1:]
break
}
//sub := "*"
typeExpr := field.Type
switch field.Type.(type) {
case *ast.MapType, *ast.StructType, *ast.ArrayType:
typedName = "o." + name
typedValue = "value"
default:
typedName = "*o." + name
typedValue = "&value"
}
start := typeExpr.Pos() - 1
end := typeExpr.End() - 1
fieldType := strings.Replace(string(b[start:end]), "*", "", 1)
fStruct := fieldStruct{
Name: name,
StructName: inputStructName,
Type: fieldType,
TypedName: typedName,
TypedValue: typedValue,
ZeroName: zeroName,
}
fieldStructs = append(fieldStructs, fStruct)
} // for
bodyStruct := struct {
PackageName string
Imports []string
Date string
StructName string
Fields []fieldStruct
}{
PackageName: pkg,
Imports: imports,
Date: time.Now().String(),
StructName: inputStructName,
Fields: fieldStructs,
}
body := template.Must(template.New("body").Parse(bodyTmpl))
// create the body
if err := body.Execute(out, bodyStruct); err != nil {
fmt.Println(err)
os.Exit(1)
}
// close out file
if err := out.Close(); err != nil {
fmt.Println(err)
os.Exit(1)
}
closed = true
// go fmt file
gofmt := exec.Command("go", "fmt", out.Name())
gofmt.Stderr = os.Stdout
if err := gofmt.Run(); err != nil {
fmt.Println(err)
os.Exit(1)
}
// go import file
goimport := exec.Command("goimports", "-w", out.Name())
goimport.Stderr = os.Stdout
if err := goimport.Run(); err != nil {
fmt.Println(err)
os.Exit(1)
}
}
}
return true
})
}
|
