src/commit.rs: add check_path function

src/commit.rs

 use crate::init;
-use std::process::{exit, Command};
+use std::{process::{exit, Command}, path::PathBuf};
+
+
+/// Check if .borg repository and results folder exists
+pub fn check_path() -> (PathBuf, PathBuf) {
+    let (borg_folder, results_folder) = init::get_borg_folder();
+    if !borg_folder.is_dir() {
+        eprintln!("{} folder not found !", borg_folder.to_str().unwrap());
+        exit(2)
+    }
+    (borg_folder, results_folder)
+}
+
 
 /// Get the current commit name of a git repository
 ///
@@ -26,7 +38,7 @@ pub fn get_current_commit() -> String {
 
 /// Create a commit of the results folder named as the current git commit id
 pub fn commit(compression: String) {
-    let (borg_folder, results_folder) = init::get_borg_folder();
+    let (borg_folder, results_folder) = check_path();
     let commit = get_current_commit();
     let output = Command::new("borg")
         .arg("create")