/
fash.go
143 lines (118 loc) · 2.33 KB
/
fash.go
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package main
import (
"fmt"
"os"
"path/filepath"
"sync"
"time"
"bitbucket.org/kalafut/gosh"
"github.com/spaolacci/murmur3"
)
const SAMPLE_SIZE = 4096
const FULL_HASH_LIMIT = 3 * SAMPLE_SIZE
const WORKERS = 10
var exts = gosh.NewSet(".jpg", ".mp4")
func smartHash(file string) (uint64, error) {
h := murmur3.New64()
f, err := os.Open(file)
defer f.Close()
fi, err := f.Stat()
if err != nil {
return 0, err
}
if fi.Size() <= FULL_HASH_LIMIT {
buffer := make([]byte, fi.Size())
f.Read(buffer)
h.Write(buffer)
} else {
buffer := make([]byte, SAMPLE_SIZE)
f.Read(buffer)
h.Write(buffer)
f.Seek(fi.Size()/2, 0)
f.Read(buffer)
h.Write(buffer)
f.Seek(-SAMPLE_SIZE, 2)
f.Read(buffer)
h.Write(buffer)
}
return h.Sum64(), nil
}
func hashFiles(files <-chan *File, catalog *Catalog) {
buffer := make([]byte, SAMPLE_SIZE)
h := murmur3.New64()
for file := range files {
h.Reset()
f, _ := os.Open(file.Path)
f.Read(buffer)
h.Write(buffer)
f.Close()
file.Hash = h.Sum64()
catalog.AddFile(file)
}
}
func traverse(root string) <-chan *File {
files := make(chan *File)
go func() {
defer close(files)
filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
if err != nil {
panic(err)
}
//if exts.Contains(strings.ToLower(filepath.Ext(path))) {
if info.Mode().IsRegular() {
files <- &File{Path: path, Size: info.Size(), ModTime: info.ModTime()}
}
//}
return nil
})
}()
return files
}
func monitor(catalog *Catalog) {
for {
fmt.Println(catalog.count)
time.Sleep(1 * time.Second)
}
}
func listCatalog(name string) error {
catalog, err := LoadCatalog(name)
if err != nil {
return err
}
catalog.List()
return nil
}
func build(root string, name string) {
var wg sync.WaitGroup
catalog := NewCatalog()
go monitor(catalog)
files := traverse(root)
for w := 0; w < WORKERS; w++ {
wg.Add(1)
go func() {
defer wg.Done()
hashFiles(files, catalog)
}()
}
wg.Wait()
catalog.Save(name)
}
func dedupe(keep string, kill string, doDelete bool) error {
keepCat, err := LoadCatalog(keep)
if err != nil {
return err
}
killCat, err := LoadCatalog(kill)
if err != nil {
return err
}
files := BInA(keepCat, killCat)
for _, f := range files {
if doDelete {
os.Remove(f)
fmt.Print("Deleting: ")
}
fmt.Println(f)
}
return nil
}