Initial commit

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${workspaceFolder}/pkg/main.go",
+            "env": {},
+            "args": []
+        }
+    ]
+}

go.mod

@@ -0,0 +1,8 @@
+module github.com/Alex99y/duplicate-files
+
+go 1.14
+
+require (
+	github.com/spf13/cobra v1.0.0
+	github.com/spf13/pflag v1.0.5 // indirect
+)

go.sum

@@ -0,0 +1,141 @@
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pkg/cmd/cli.go

@@ -0,0 +1,57 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// CobraInterface represents the CMD interface
+type CobraInterface struct {
+	RootCmd         *cobra.Command
+	NumberOfThreads uint64
+	RootFolder      string
+}
+
+func (cmd *CobraInterface) setRootCommand() {
+	cmd.RootCmd = &cobra.Command{
+		Short: "Short",
+		Long:  "Long",
+	}
+}
+
+func (cmd *CobraInterface) setVersion() {
+	version := &cobra.Command{
+		Use:   "version",
+		Short: "Print app version",
+		Run: func(c *cobra.Command, arg []string) {
+			fmt.Print("v0.0.1")
+		},
+	}
+	cmd.RootCmd.AddCommand(version)
+}
+
+func (cmd *CobraInterface) setStart() {
+	start := &cobra.Command{
+		Use:   "start",
+		Short: "Execute duplicate files searcher",
+		Long:  "Long description",
+		Run: func(c *cobra.Command, arg []string) {
+			cmd.RootFolder, _ = c.PersistentFlags().GetString("path")
+			cmd.NumberOfThreads, _ = c.PersistentFlags().GetUint64("threads")
+		},
+	}
+	start.PersistentFlags().Uint64P("threads", "t", 4, "--threads 2")
+	start.PersistentFlags().StringP("path", "f", "", "--path /home")
+	start.MarkPersistentFlagRequired("path")
+
+	cmd.RootCmd.AddCommand(start)
+}
+
+// Execute function starts reading arguments from CLI
+func (cmd *CobraInterface) Execute() {
+	cmd.setRootCommand()
+	cmd.setVersion()
+	cmd.setStart()
+	cmd.RootCmd.Execute()
+}

pkg/core/core.go

@@ -0,0 +1,116 @@
+package core
+
+import (
+	"fmt"
+	"path"
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/Alex99y/duplicate-files/pkg/cmd"
+	"github.com/Alex99y/duplicate-files/pkg/crypto"
+	"github.com/Alex99y/duplicate-files/pkg/structures"
+	"github.com/Alex99y/duplicate-files/pkg/utils"
+)
+
+const threadRetryBeforeReturn = 1
+
+var wg sync.WaitGroup
+
+// StructureInfo contains the configuration to start the process
+type StructureInfo struct {
+	folderQueue *structures.QueueWithSync
+	resultMap   *structures.MapWithSync
+}
+
+func (s *StructureInfo) processFile() {
+	// Process file
+}
+
+func (s *StructureInfo) processFolder(id int) {
+	// Retries before return
+	retriesLeft := threadRetryBeforeReturn
+	for {
+		// Dequeue next file to process
+		nextFolderToProcess := s.folderQueue.Dequeue()
+
+		if nextFolderToProcess != nil {
+			retriesLeft = threadRetryBeforeReturn
+			file := nextFolderToProcess.(string)
+			isDir, err := utils.IsDirectory(file)
+			if err != nil {
+				fmt.Println(err)
+				continue
+			}
+			if isDir {
+				// Process folder
+				files := utils.ReadFilesFromDirectory(file)
+				for _, f := range files {
+					s.folderQueue.Enqueue(path.Join(file, f))
+				}
+			} else {
+				// Process regular file
+				fileContent := utils.ReadFile(file)
+				fileHash := crypto.GetFileHash(fileContent)
+				s.resultMap.AddElement(fileHash, file)
+				fileContent = nil
+			}
+		} else {
+			if retriesLeft == 0 {
+				break
+			} else {
+				time.Sleep(500 * time.Millisecond)
+				retriesLeft--
+			}
+		}
+	}
+
+	// End task
+	wg.Done()
+}
+
+// Start function will start the thread process
+func Start(config cmd.CobraInterface) {
+
+	// Prepare queues
+	structure := StructureInfo{
+		// Contains the folder/files to process
+		folderQueue: structures.NewQueue(),
+		// Contains the result (duplicated files)
+		resultMap: structures.NewMap(),
+	}
+	structure.folderQueue.Enqueue(config.RootFolder)
+
+	// Total threads to improve paralellism
+	threads := runtime.NumCPU() / 2
+	if int(config.NumberOfThreads) < threads {
+		threads = int(config.NumberOfThreads)
+	}
+	runtime.GOMAXPROCS(threads)
+	wg.Add(threads)
+
+	// Start searching
+	for i := 0; i < threads; i++ {
+		go structure.processFolder(i)
+	}
+
+	// Wait until goroutines ends
+	wg.Wait()
+
+	resultMap := structure.resultMap.GetMap()
+	gotDuplicates := false
+
+	for key, files := range resultMap {
+		if len(files) > 1 {
+			gotDuplicates = true
+			fmt.Println("Duplicated files (" + key + "):")
+			for _, file := range files {
+				fmt.Println(file)
+			}
+			fmt.Print("\n")
+		}
+	}
+	if gotDuplicates == false {
+		fmt.Println("No duplicated files found")
+	}
+}

pkg/crypto/crypto.go

@@ -0,0 +1,12 @@
+package crypto
+
+import (
+	"crypto/sha256"
+	"fmt"
+)
+
+// GetFileHash returns the sha256 of the file's content
+func GetFileHash(file []byte) string {
+	checksum := sha256.Sum256(file)
+	return fmt.Sprintf("%x", checksum)
+}

pkg/main.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"github.com/Alex99y/duplicate-files/pkg/cmd"
+	"github.com/Alex99y/duplicate-files/pkg/core"
+)
+
+func main() {
+	cobra := new(cmd.CobraInterface)
+	cobra.Execute()
+	core.Start(*cobra)
+}