1package main
2
3import (
4	"flag"
5	"fmt"
6	"go/ast"
7	"go/format"
8	"go/parser"
9	"go/token"
10	"log"
11	"os"
12
13	"golang.org/x/tools/go/ast/astutil"
14)
15
16// https://github.com/shirou/gopsutil/issues/429
17func issue429() error {
18	f := func(filename string) error {
19		fset := token.NewFileSet()
20		expr, err := parser.ParseFile(fset, filename, nil, parser.ParseComments)
21		if err != nil {
22			return err
23		}
24		n := astutil.Apply(expr, func(cr *astutil.Cursor) bool {
25			if cr.Name() == "Decls" {
26				switch n := cr.Node().(type) {
27				case *ast.FuncDecl:
28					if n.Name.Name == "NetIOCounters" || n.Name.Name == ("NetIOCountersWithContext") {
29						cr.Delete()
30					}
31				}
32			}
33			return true
34		}, nil)
35		return replace(filename, fset, n)
36	}
37
38	root := "process/"
39	fnames := []string{"process.go", "process_darwin.go", "process_fallback.go", "process_freebsd.go", "process_linux.go", "process_openbsd.go", "process_bsd.go", "process_posix.go", "process_windows.go", "process_test.go"}
40	for _, fname := range fnames {
41		if err := f(root + fname); err != nil {
42			log.Fatalln("run 429:", err)
43		}
44	}
45	return nil
46}
47
48func issueRemoveUnusedValue() error {
49	f := func(filename string) error {
50		fset := token.NewFileSet()
51		expr, err := parser.ParseFile(fset, filename, nil, parser.ParseComments)
52		if err != nil {
53			return err
54		}
55		n := astutil.Apply(expr, func(cr *astutil.Cursor) bool {
56			if cr.Name() == "Decls" {
57				switch n := cr.Node().(type) {
58				case *ast.GenDecl:
59					if n.Tok != token.TYPE {
60						break
61					}
62					ts := n.Specs[0].(*ast.TypeSpec)
63					if ts.Name.Name == "SystemProcessInformation" {
64						cr.Delete()
65					}
66				}
67			}
68			return true
69		}, nil)
70		return replace(filename, fset, n)
71	}
72
73	if err := f("process/process_windows.go"); err != nil {
74		log.Fatalln("run 429:", err)
75	}
76	return nil
77}
78
79func replace(filename string, fset *token.FileSet, n ast.Node) error {
80	if err := os.Remove(filename); err != nil {
81		return err
82	}
83	fp, err := os.Create(filename)
84	if err != nil {
85		return err
86	}
87	defer fp.Close()
88	if err := format.Node(fp, fset, n); err != nil {
89		return err
90	}
91	fp.WriteString("\n")
92	return nil
93}
94
95func main() {
96	flag.Parse()
97	for _, n := range flag.Args() {
98		fmt.Println("issue:" + n)
99		switch n {
100		case "429":
101			issue429()
102		case "issueRemoveUnusedValue":
103			issueRemoveUnusedValue()
104		}
105	}
106
107}
108