show goimports

show-goimport.go

package main

import (
        "fmt"
        "go/ast"
        "go/parser"
        "go/token"
        "os"
)

func main() {
        for i, arg := range os.Args {
                if i == 0 {
                        continue
                }
                fmt.Println(arg)
                fset := token.NewFileSet()
                f, err := parser.ParseFile(fset, arg, nil, 0)
                if err != nil {
                        panic(err)
                }
                for _, decl := range f.Decls {
                        switch td := decl.(type) {
                        case *ast.GenDecl:
                                switch td.Tok {
                                case token.IMPORT:
                                        for _, sp := range td.Specs {
                                                s := sp.(*ast.ImportSpec)
                                                fmt.Println(s.Path.Value)
                                        }
                                default:
                                }
                        }
                }
                fmt.Println()
        }
}