Lock ozy config directory when updating

rozy/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ozy"
-version = "0.1.8"
+version = "0.1.9"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

rozy/src/files.rs

@@ -1,6 +1,7 @@
 use std::env;
 
 use anyhow::{Context, Error, Result};
+use file_lock::{FileLock, FileOptions};
 
 fn get_home_dir() -> Result<std::path::PathBuf, Error> {
     let home_dir = std::env::var("HOME").context("While checking $HOME")?;
@@ -78,3 +79,10 @@ pub fn softlink(from_command: &str, to_command: &str) -> Result<bool> {
     })?;
     Ok(was_there)
 }
+
+pub fn lock_ozy_dir() -> Result<FileLock> {
+    let lock_for_writing = FileOptions::new().create(true).write(true).read(true);
+    let lock_path = get_ozy_dir()?.join("ozy.lock");
+    let lock = FileLock::lock(lock_path, true, lock_for_writing).context("Locking ozy config")?;
+    Ok(lock)
+}

rozy/src/main.rs

@@ -233,6 +233,7 @@ fn get_apps(config: &serde_yaml::Mapping) -> Result<Vec<app::App>> {
 
 fn update(path_to_ozy: &std::path::PathBuf, url: &Option<String>) -> Result<()> {
     files::ensure_ozy_dirs()?;
+    let _lock = files::lock_ozy_dir()?;
     let old_base_ozy_conf = files::get_ozy_dir()?.join("ozy.yaml");
     let new_base_ozy_conf = files::get_ozy_dir()?.join("ozy.yaml.tmp");