src/commit.rs: add a commit functionality

src/commit.rs

+use crate::init;
+use std::process::{exit, Command};
+
+/// Get the current commit name of a git repository
+///
+/// # Return:
+/// * A string corresponding to the current commit id
+pub fn get_current_commit() -> String {
+    let output = Command::new("git")
+        .arg("rev-parse")
+        .arg("--verify")
+        .arg("HEAD")
+        .output()
+        .unwrap();
+    match output.status.code().unwrap() {
+        0 => (),
+        num => {
+            eprintln!("{}", String::from_utf8(output.stderr).unwrap());
+            exit(num);
+        }
+    }
+    let mut commit = String::from_utf8(output.stdout).unwrap();
+    commit.pop();
+    commit
+}
+
+/// 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 commit = get_current_commit();
+    let output = Command::new("borg")
+        .arg("create")
+        .arg("--stats")
+        .arg("--progress")
+        .arg("--compression")
+        .arg(compression)
+        .arg(format!("{}::{}", borg_folder.to_str().unwrap(), commit))
+        .arg(results_folder.to_str().unwrap())
+        .output()
+        .unwrap();
+    match output.status.code().unwrap() {
+        0 => (),
+        num => {
+            eprintln!("{}", String::from_utf8(output.stderr).unwrap());
+            exit(num);
+        }
+    }
+}