Fix #181, and check that there are modpacks before listing them

Author: theRookieCoder

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog for Ferium
 
+## `4.1.9`
+### 25.07.2022
+
+- Fix [#181](https://github.com/gorilla-devs/ferium/issues/181), create the backup directory before copying files over
+- Check that there are modpacks before listing them
+
 ## `v4.1.8`
 ### 18.07.2022
 

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "ferium"
-version = "4.1.8"
+version = "4.1.9"
 edition = "2021"
 # Because of `std::process::ExitCode`
 rust-version = "1.61"
@@ -23,7 +23,7 @@ gtk = ["libium/gtk"]
 xdg = ["libium/xdg"]
 
 [dependencies]
-tokio = { version = "~1.20.0", default-features = false, features = [
+tokio = { version = "~1.20.1", default-features = false, features = [
     "rt-multi-thread",
     "macros",
 ] }
@@ -33,7 +33,7 @@ reqwest = { version = "~0.11.11", default-features = false, features = [
 octocrab = { version = "~0.16.0", default-features = false, features = [
     "rustls",
 ] }
-clap = { version = "~3.2.12", features = ["derive"] }
+clap = { version = "~3.2.14", features = ["derive"] }
 clap_complete = "~3.2.3"
 lazy_static = "~1.4.0"
 serde_json = "~1.0.82"

Cargo.toml

@@ -259,7 +259,12 @@ async fn actual_main(cli_app: Ferium) -> Result<()> {
             ModpackSubCommands::Delete { modpack_name } => {
                 subcommands::modpack::delete(&mut config, modpack_name)?;
             },
-            ModpackSubCommands::List => subcommands::modpack::list(&config),
+            ModpackSubCommands::List => {
+                if config.modpacks.is_empty() {
+                    bail!("There are no modpacks configured, add a modpack using `ferium modpack add`")
+                }
+                subcommands::modpack::list(&config);
+            },
             ModpackSubCommands::Switch { modpack_name } => {
                 subcommands::modpack::switch(&mut config, modpack_name)?;
             },

src/main.rs

@@ -21,6 +21,7 @@ use libium::{
     HOME,
 };
 use std::{fs::read_dir, path::PathBuf};
+use tokio::fs::create_dir_all;
 
 pub fn pick_mod_loader(default: Option<&ModLoader>) -> Result<ModLoader> {
     let mut picker = Select::with_theme(&*THEME);
@@ -90,6 +91,7 @@ pub async fn check_output_directory(output_dir: &PathBuf) -> Result<()> {
             let backup_dir = pick_folder(&*HOME, "Where should the backup be made?")
                 .await
                 .unwrap();
+            create_dir_all(&backup_dir).await?;
             copy(output_dir, backup_dir, &CopyOptions::new())?;
         }
     }