diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..8937dd6
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/bakhirev/git-log
+
+go 1.23.1
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..bd73d58
--- /dev/null
+++ b/main.go
@@ -0,0 +1,109 @@
+package main
+
+import (
+ "fmt"
+ "os"
+ "os/exec"
+ "path/filepath"
+)
+
+func showMessage(message string) {
+ for _, arg := range os.Args {
+  if arg == "--debug" {
+   fmt.Println("Assayo: " + message)
+   break
+  }
+ }
+}
+
+func checkDirExists(path string) bool {
+  if _, err := os.Stat(path); os.IsNotExist(err) {
+    return false
+  }
+  return true
+}
+
+func getSaveLogCommand() string {
+ raw := "--raw --numstat"
+ for _, arg := range os.Args {
+  if arg == "--no-file" {
+   raw = ""
+   break
+  }
+ }
+ return fmt.Sprintf("git --no-pager log %s --oneline --all --reverse --date=iso-strict --pretty=format:\"%%ad>%%aN>%%aE>%%s\"", raw)
+}
+
+func getCloneRepoCommand() string {
+ return "git clone https://github.com/bakhirev/assayo.git && mv ./assayo ./source && mv ./source/build ./assayo && rm -r -f ./source"
+}
+
+func Assayo() error {
+ // folder, when library was saved
+ sourceDir := "../pkg/mod/github.com/bakhirev/assayo@v0.0.1/"
+ sourcePath := filepath.Dir(os.Args[0])
+
+ // folder, when user run library
+ distDir := "assayo"
+ distPath, _ := os.Getwd()
+
+ home := filepath.Join(sourcePath, sourceDir)
+ source := filepath.Join(home, "./assayo")
+ target := filepath.Join(distPath, distDir)
+ 
+ err := os.Chdir(home)
+ if err != nil {
+   fmt.Println("Cant found home dir:", err)
+   return err
+ }
+ 
+ // 0. Clone actual report from GIT
+ if checkDirExists(source) {
+  showMessage("actual report template already exist")
+ } else {
+  commandStr := getCloneRepoCommand()
+  command := exec.Command("bash", "-c", commandStr)
+  if err := command.Run(); err != nil {
+   fmt.Println(commandStr)
+   return err
+  }
+ }
+
+ // 1. Copy folder ./assayo from package to ./assayo in project
+ if checkDirExists(target) {
+  showMessage("directory with HTML report already exist")
+ } else {
+  command := exec.Command("cp", "-r", source, target)
+  if err := command.Run(); err != nil {
+   fmt.Println("Error copying directory:", err)
+   return err
+  }
+ }
+ showMessage("directory with HTML report was created")
+
+ // 2. Run 'git log' and save output in string
+ showMessage("reading git log was started")
+ os.Chdir(distPath)
+ commandStr := getSaveLogCommand()
+ command := exec.Command("bash", "-c", commandStr)
+ outputBytes, err := command.Output()
+ if err != nil {
+  fmt.Println("Error saving git log:", err)
+  return err
+ }
+ showMessage("the file with git log was saved")
+
+ // 3. Replace symbols in ./assayo/log.txt
+ newContent := string(outputBytes)
+ fileName := filepath.Join(target, "log.txt")
+ if err := os.WriteFile(fileName, []byte("R(f`"+newContent+"`);"), 0644); err != nil {
+  fmt.Println("Error writing file:", err)
+  return err
+ }
+
+ return nil
+}
+
+func main() {
+ Assayo()
+}