admin/server/utils/ast/import.go

95 lines
2.1 KiB
Go
Raw Normal View History

2025-06-19 21:53:00 +08:00
package ast
import (
"go/ast"
"go/token"
"io"
"strings"
)
type Import struct {
Base
ImportPath string // 导包路径
}
func NewImport(importPath string) *Import {
return &Import{ImportPath: importPath}
}
func (a *Import) Parse(filename string, writer io.Writer) (file *ast.File, err error) {
return a.Base.Parse(filename, writer)
}
func (a *Import) Rollback(file *ast.File) error {
if a.ImportPath == "" {
return nil
}
for i := 0; i < len(file.Decls); i++ {
v1, o1 := file.Decls[i].(*ast.GenDecl)
if o1 {
if v1.Tok != token.IMPORT {
break
}
for j := 0; j < len(v1.Specs); j++ {
v2, o2 := v1.Specs[j].(*ast.ImportSpec)
if o2 && strings.HasSuffix(a.ImportPath, v2.Path.Value) {
v1.Specs = append(v1.Specs[:j], v1.Specs[j+1:]...)
if len(v1.Specs) == 0 {
file.Decls = append(file.Decls[:i], file.Decls[i+1:]...)
} // 如果没有import声明就删除, 如果不删除则会出现import()
break
}
}
}
}
return nil
}
func (a *Import) Injection(file *ast.File) error {
if a.ImportPath == "" {
return nil
}
var has bool
for i := 0; i < len(file.Decls); i++ {
v1, o1 := file.Decls[i].(*ast.GenDecl)
if o1 {
if v1.Tok != token.IMPORT {
break
}
for j := 0; j < len(v1.Specs); j++ {
v2, o2 := v1.Specs[j].(*ast.ImportSpec)
if o2 && strings.HasSuffix(a.ImportPath, v2.Path.Value) {
has = true
break
}
}
if !has {
spec := &ast.ImportSpec{
Path: &ast.BasicLit{Kind: token.STRING, Value: a.ImportPath},
}
v1.Specs = append(v1.Specs, spec)
return nil
}
}
}
if !has {
decls := file.Decls
file.Decls = make([]ast.Decl, 0, len(file.Decls)+1)
decl := &ast.GenDecl{
Tok: token.IMPORT,
Specs: []ast.Spec{
&ast.ImportSpec{
Path: &ast.BasicLit{Kind: token.STRING, Value: a.ImportPath},
},
},
}
file.Decls = append(file.Decls, decl)
file.Decls = append(file.Decls, decls...)
} // 如果没有import声明就创建一个, 主要要放在第一个
return nil
}
func (a *Import) Format(filename string, writer io.Writer, file *ast.File) error {
return a.Base.Format(filename, writer, file)
}