archive: Add install importing

Allows exported installs to be imported using the command `vento -G`.
Mind the uppercase "G" there!

src/archive.rs

@@ -101,3 +101,22 @@ pub fn import_inv(input: PathBuf, slot: &str, message: bool) -> Result<()> {
     };
     Ok(())
 }
+
+pub fn import_install(input: PathBuf, message: bool) -> Result<()> {
+    let dir: PathBuf = common::env_config()?.vento_dir;
+
+    let tar_xz = File::open(&input)?;
+    let tar = XzDecoder::new(tar_xz);
+    let mut archive = Archive::new(tar);
+    archive.unpack(&dir)?;
+
+    if message {
+        println!(
+            "✅ {} {} {}",
+            "Imported".green(),
+            &input.to_str().unwrap(),
+            "into Vento install".green(),
+        );
+    };
+    Ok(())
+}

src/bin/vento.rs

@@ -71,6 +71,11 @@ fn main() -> Result<()> {
                     2 => throw_error(ErrorType::SpecifyFile)?,
                     _ => throw_error(ErrorType::TooManyArgs)?,
                 },
+                "-G" | "--import-install" => match args.len() {
+                    3 => archive::import_install(PathBuf::from(&args[2]), true)?,
+                    2 => throw_error(ErrorType::SpecifyFile)?,
+                    _ => throw_error(ErrorType::TooManyArgs)?,
+                },
                 "-s" => match args.len() {
                     4 => inv::list(&args[2], &args[3])?,
                     3 => inv::list(&args[2], "")?,