forked from BenLubar/vpk
/
main.go
141 lines (118 loc) · 2.36 KB
/
main.go
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package main
import (
"bytes"
"crypto/sha1"
"flag"
"fmt"
"io"
"os"
"strings"
"github.com/BenLubar/vpk"
"github.com/petar/GoLLRB/llrb"
)
var whitelist = map[string]bool{
"addonimage.jpg": true,
"addoninfo.txt": true,
}
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: vpkcollision [file1.vpk] [file2.vpk] [file3.vpk]\n\n")
flag.PrintDefaults()
os.Exit(2)
}
}
type file struct {
path string
vpks []*vpk.VPK
}
func (f *file) Less(item llrb.Item) bool {
return f.path < item.(*file).path
}
func main() {
skipSame := flag.Bool("skip-same", false, "don't warn about the exact same file being in multiple VPKs.")
flag.Parse()
if flag.NArg() == 0 {
flag.Usage()
}
reverse := make(map[*vpk.VPK]string)
files := llrb.New()
for _, name := range flag.Args() {
var opener vpk.Opener
if strings.HasSuffix(name, "_dir.vpk") {
opener = vpk.MultiVPK(name[:len(name)-len("_dir.vpk")])
} else {
opener = vpk.SingleVPK(name)
}
v, err := vpk.Open(opener)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %v\n", name, err)
os.Exit(2)
}
reverse[v] = name
for _, path := range v.Paths() {
f := &file{path: path}
if item := files.Get(f); item != nil {
f = item.(*file)
} else {
files.InsertNoReplace(f)
}
f.vpks = append(f.vpks, v)
}
}
exitStatus := 0
files.AscendGreaterOrEqual(files.Min(), func(item llrb.Item) bool {
f := item.(*file)
if whitelist[f.path] {
return true
}
if len(f.vpks) == 1 {
return true
}
hashes := make([][]byte, 0, len(f.vpks))
for _, v := range f.vpks {
hash, err := doHash(v.Entry(f.path))
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %s: %v\n", reverse[v], f.path, err)
os.Exit(2)
}
hashes = append(hashes, hash)
}
if *skipSame {
any := false
for _, h := range hashes[1:] {
if !bytes.Equal(hashes[0], h) {
any = true
break
}
}
if !any {
return true
}
}
fmt.Printf("%s:\n", f.path)
for i, h := range hashes {
fmt.Printf("%s: %x\n", reverse[f.vpks[i]], h)
}
fmt.Printf("\n")
exitStatus = 1
return true
})
os.Exit(exitStatus)
}
func doHash(e vpk.Entry) (hash []byte, err error) {
r, err := e.Open()
if err != nil {
return
}
defer func() {
if e := r.Close(); err == nil {
err = e
}
}()
h := sha1.New()
_, err = io.Copy(h, r)
if err != nil {
return
}
return h.Sum(nil), nil
}