github.com/goplus/gogen@v1.16.0/chore/gobyeff/by_effect.go (about)

     1  /*
     2   Copyright 2022 The GoPlus Authors (goplus.org)
     3   Licensed under the Apache License, Version 2.0 (the "License");
     4   you may not use this file except in compliance with the License.
     5   You may obtain a copy of the License at
     6       http://www.apache.org/licenses/LICENSE-2.0
     7   Unless required by applicable law or agreed to in writing, software
     8   distributed under the License is distributed on an "AS IS" BASIS,
     9   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    10   See the License for the specific language governing permissions and
    11   limitations under the License.
    12  */
    13  
    14  package main
    15  
    16  import (
    17  	"fmt"
    18  	"go/token"
    19  	"go/types"
    20  	"log"
    21  	"os"
    22  
    23  	"github.com/goplus/gogen/packages"
    24  )
    25  
    26  type none = struct{}
    27  
    28  func usage() {
    29  	fmt.Fprintf(os.Stderr, "Usage: gobyeff pkgPath\n")
    30  }
    31  
    32  func main() {
    33  	if len(os.Args) < 2 {
    34  		usage()
    35  		return
    36  	}
    37  	fset := token.NewFileSet()
    38  	imp := packages.NewImporter(fset)
    39  	pkg, err := imp.Import(os.Args[1])
    40  	check(err)
    41  	checkSideEffect(imp, pkg, make(map[string]none))
    42  }
    43  
    44  func checkSideEffect(imp types.Importer, pkg *types.Package, checked map[string]none) {
    45  	pkgPath := pkg.Path()
    46  	if _, ok := checked[pkgPath]; ok {
    47  		return
    48  	}
    49  	checked[pkgPath] = none{}
    50  	fmt.Println("==> Checking", pkgPath)
    51  	if !pkg.Complete() {
    52  		pkg, _ = imp.Import(pkgPath)
    53  	}
    54  	scope := pkg.Scope()
    55  	for _, name := range scope.Names() {
    56  		switch o := scope.Lookup(name).(type) {
    57  		case *types.Var:
    58  			fmt.Println("var", o.Name(), o.Type())
    59  		}
    60  	}
    61  	fmt.Println()
    62  	for _, ref := range pkg.Imports() {
    63  		checkSideEffect(imp, ref, checked)
    64  	}
    65  }
    66  
    67  func check(err error) {
    68  	if err != nil {
    69  		log.Panicln(err)
    70  	}
    71  }