Added mod installation. First working version.

src/installer.rs

@@ -0,0 +1,135 @@
+use std::{
+    fs::{create_dir_all, read_dir, remove_dir_all, remove_file, DirEntry},
+    path::{Path, PathBuf},
+};
+
+use munsikka::*;
+
+const IGNORED_INSTALL: [&str; 7] = [
+    "icon.png",
+    "README.md",
+    "manifest.json",
+    "LICENSE",
+    "LICENSE.md",
+    "LICENSE.txt",
+    "CHANGELOG.md",
+];
+
+// TODO: Remove hardcoding
+const MOD_LOADER_FILES: [&str; 3] = ["BepInEx", "doorstop_config.ini", "winhttp.dll"];
+
+/// Removes any mod files from the game directory
+pub fn clean(game_dir: &Path) -> std::io::Result<()> {
+    println!("Cleaning old installation...");
+    MOD_LOADER_FILES
+        .iter()
+        .map(|item| game_dir.join(PathBuf::from(item)))
+        .for_each(|removal_target| {
+            // TODO: Only suppress NotFound errors
+            if removal_target.is_dir() {
+                remove_dir_all(removal_target).ok();
+            } else {
+                remove_file(removal_target).ok();
+            }
+        });
+    Ok(())
+}
+
+pub fn install(from: &Path, game_dir: &Path, mod_info: &ModInfo) -> std::io::Result<()> {
+    for path in [from, game_dir].iter() {
+        if !path.exists() {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::NotFound,
+                format!("Couldn't find {path:?}"),
+            ));
+        }
+    }
+
+    print!(
+        "  {version: >10} | {name: <30} | {author: <30} ",
+        name = mod_info.name,
+        author = mod_info.author,
+        version = mod_info.version_string(),
+    );
+
+    let mut flavour_string = String::new();
+
+    for entry in read_dir(from)? {
+        let entry = entry.unwrap();
+        if IGNORED_INSTALL
+            .iter()
+            .any(|ignored| *ignored == entry.file_name())
+        {
+            continue;
+        }
+
+        match choose_install_strategy(&entry) {
+            InstallStrategy::PluginFile => {
+                recursive_install(
+                    &entry.path(),
+                    &game_dir.join(PathBuf::from("BepInEx/plugins")),
+                )
+                .unwrap();
+                flavour_string.push_str("📦");
+            }
+            InstallStrategy::LoaderSubDirectory => {
+                recursive_install(&entry.path(), &game_dir.join(PathBuf::from("BepInEx"))).unwrap();
+                flavour_string.push_str("📂");
+            }
+            InstallStrategy::LoaderDirectory => {
+                recursive_install(&entry.path(), &game_dir).unwrap();
+                flavour_string.push_str("📂");
+            }
+            InstallStrategy::GameDirectory => {
+                for item in MOD_LOADER_FILES.iter() {
+                    recursive_install(&entry.path().join(PathBuf::from(item)), &game_dir).unwrap();
+                }
+                flavour_string.push_str("🛠️");
+            }
+        }
+    }
+
+    println!("✅ {flavour_string}");
+    Ok(())
+}
+
+enum InstallStrategy {
+    /// Simple .dll files and other resources
+    PluginFile,
+    /// Directory contained within the mod loader directory
+    LoaderSubDirectory,
+    /// The directory is the top-level directory
+    LoaderDirectory,
+    /// Contents should be installed to the game directory, used by the mod loader.
+    GameDirectory,
+}
+
+fn choose_install_strategy(top_level_file: &DirEntry) -> InstallStrategy {
+    if top_level_file.file_name() == "BepInExPack" {
+        return InstallStrategy::GameDirectory;
+    }
+    if top_level_file.file_name() == "BepInEx" {
+        return InstallStrategy::LoaderDirectory;
+    }
+    if top_level_file.path().is_dir() {
+        return InstallStrategy::LoaderSubDirectory;
+    }
+    InstallStrategy::PluginFile
+}
+
+fn recursive_install(src: &Path, dest: &Path) -> std::io::Result<()> {
+    if src.is_dir() {
+        for entry in read_dir(src)? {
+            let entry = entry?;
+            recursive_install(
+                &src.join(entry.file_name()),
+                &dest.join(src.file_name().unwrap()),
+            )?;
+        }
+    } else {
+        let dest = dest.join(src.file_name().unwrap());
+        create_dir_all(dest.parent().unwrap())?;
+        std::fs::copy(src, dest)?;
+    }
+    Ok(())
+}

src/lib.rs

@@ -9,13 +9,14 @@ use yaml_rust2::Yaml;
 
 pub const BASE_URL: &str = "http://thunderstore.io";
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct ModInfo {
     pub name: String,
     pub author: String,
     pub version: (i64, i64, i64),
     pub website_url: String,
     pub enabled: bool,
+    pub dependencies: Vec<Option<String>>,
 }
 
 impl ModInfo {
@@ -30,6 +31,11 @@ impl ModInfo {
             ),
             website_url: yaml["websiteUrl"].as_str()?.to_owned(),
             enabled: yaml["enabled"].as_bool()?,
+            dependencies: yaml["dependencies"]
+                .as_vec()?
+                .iter()
+                .map(|y| y.as_str().map(|str| str.to_owned()))
+                .collect(),
         })
     }
 
@@ -167,7 +173,7 @@ impl FetchExtractor {
 }
 
 fn unzip_to(from: &Path, to: &Path) -> Result<(), ()> {
-    // TODO: use the zip library
+    // TODO: use a zip library
     Command::new("unzip")
         .arg(from)
         .arg("-d")
@@ -180,3 +186,11 @@ fn unzip_to(from: &Path, to: &Path) -> Result<(), ()> {
 pub fn data_dir() -> PathBuf {
     PathBuf::from(var("HOME").unwrap()).join(".local/share/munsikka")
 }
+
+pub fn game_dir() -> PathBuf {
+    match var("GAME_DIR").ok() {
+        Some(game_dir) => game_dir.into(),
+        None => PathBuf::from(var("HOME").unwrap())
+            .join(".steam/steam/steamapps/common/Lethal Company"),
+    }
+}

src/main.rs

@@ -5,6 +5,8 @@ use munsikka::*;
 use base64::prelude::*;
 use yaml_rust2::{Yaml, YamlLoader};
 
+pub mod installer;
+
 fn main() {
     // First and only argument is the (legacy) profile UUID from a mod manager user
     let profile_uuid = std::env::args()
@@ -31,6 +33,18 @@ fn main() {
 
     let mod_list = fetch_mod_list(&profile_fetcher, &profile_uuid).unwrap();
     fetch_mods(&mod_fetcher, &mod_list).unwrap();
+
+    println!("");
+    installer::clean(&game_dir()).unwrap();
+    println!("Installing mods");
+    for mod_info in mod_list.iter() {
+        installer::install(
+            &mod_fetcher.extracted_path(&mod_info.unique_name()),
+            &game_dir(),
+            &mod_info,
+        )
+        .unwrap();
+    }
 }
 
 /// Map the legacy profile response into a zip binary
@@ -47,6 +61,7 @@ fn profile_preprocessor(profile_response: Vec<u8>) -> Vec<u8> {
     BASE64_STANDARD.decode(base64_zip).unwrap()
 }
 
+/// Gets the list of required mods from a profile uuid
 fn fetch_mod_list(
     fetcher: &FetchExtractor,
     profile_uuid: &str,
@@ -64,18 +79,30 @@ fn fetch_mod_list(
 
     // Handle yaml
     let mods = &YamlLoader::load_from_str(&mods_yaml)?[0];
-    Ok(mods
-        .as_vec()
-        .ok_or(std::io::Error::new(
-            std::io::ErrorKind::Other,
-            format!("YAML file is not a list: {:?}", mods_yaml_path),
-        ))?
-        .iter()
-        .filter(|yaml| yaml["enabled"] == Yaml::Boolean(true))
-        .map(|yaml| ModInfo::from_yaml(yaml).unwrap())
-        .collect())
+
+    Ok(sort_mods(
+        &mods
+            .as_vec()
+            .ok_or(std::io::Error::new(
+                std::io::ErrorKind::Other,
+                format!("YAML file is not a list: {:?}", mods_yaml_path),
+            ))?
+            .iter()
+            .filter(|yaml| yaml["enabled"] == Yaml::Boolean(true))
+            .map(|yaml| ModInfo::from_yaml(yaml).unwrap())
+            .collect(),
+    ))
 }
 
+/// Sort mods by dependency order
+fn sort_mods(mods: &Vec<ModInfo>) -> Vec<ModInfo> {
+    // TODO: Actual dependecy sorting
+    let mut mods = mods.clone();
+    mods.sort_unstable_by_key(|mod_info| mod_info.dependencies.len());
+    mods
+}
+
+/// Download and extract mods
 fn fetch_mods(fetcher: &FetchExtractor, mod_list: &Vec<ModInfo>) -> Result<(), Box<dyn Error>> {
     println!("Fetching {} mods...", mod_list.len());