Implement basic game files download logic

Implement core clap arguments

Respect XDG_BASE_DIR

Currently library extraction is broken because it assumes every instace has it's own library folder. This should be refactored so instances share libraries

Signed-off-by: Filip Wandzio <contact@philw.dev>

2 files changed, 49 insertions, 0 deletions

diff --git a/src/platform/mod.rs b/src/platform/mod.rs
new file mode 100644
index 0000000..8118b29
--- /dev/null
+++ b/src/platform/mod.rs
@@ -0,0 +1 @@
+pub mod paths;
diff --git a/src/platform/paths.rs b/src/platform/paths.rs
new file mode 100644
index 0000000..47aae9a
--- /dev/null
+++ b/src/platform/paths.rs
@@ -0,0 +1,48 @@
+use std::{fs, path::PathBuf};
+
+use directories::ProjectDirs;
+
+use crate::{config::Config, errors::McError};
+
+fn project_dirs() -> ProjectDirs {
+    ProjectDirs::from("com", "dml", "dml").expect("failed to determine project directories")
+}
+
+/// Root Minecraft directory
+pub fn minecraft_root(_cfg: &Config) -> PathBuf { project_dirs().data_dir().join("minecraft") }
+
+/* ---------------- setup ---------------- */
+
+pub fn ensure_dirs(cfg: &Config) -> Result<(), McError> {
+    let root = minecraft_root(cfg);
+
+    fs::create_dir_all(root.join("versions"))?;
+    fs::create_dir_all(root.join("libraries"))?;
+    fs::create_dir_all(root.join("assets"))?;
+
+    Ok(())
+}
+
+/* ---------------- versions ---------------- */
+
+pub fn version_dir(cfg: &Config, version: &str) -> PathBuf {
+    minecraft_root(cfg).join("versions").join(version)
+}
+
+pub fn client_jar(cfg: &Config, version: &str) -> Result<PathBuf, McError> {
+    Ok(version_dir(cfg, version).join(format!("{}.jar", version)))
+}
+
+/* ---------------- libraries ---------------- */
+
+pub fn library_file(cfg: &Config, rel_path: &str) -> Result<PathBuf, McError> {
+    Ok(minecraft_root(cfg)
+        .join("libraries")
+        .join(rel_path))
+}
+
+/* ---------------- natives ---------------- */
+
+pub fn natives_dir(cfg: &Config, version: &str) -> PathBuf {
+    version_dir(cfg, version).join("natives")
+}