Do no allow to run dura as root (#134)

If `dura` runs as root, libgit2 will create files that will be owned by root. The repo will appear as corrupted to a non-root user.

Author: Amanse

Cargo.lock

@@ -23,6 +23,7 @@ toml = "0.5.8"
 tracing = { version = "0.1.5"}
 tracing-subscriber = { version = "0.3", features = ["env-filter", "registry"] }
 walkdir = "2.3.2"
+sudo = "0.6.0"
 
 [dev-dependencies]
 tempfile = "3.2.0"

Cargo.toml

@@ -20,6 +20,11 @@ use tracing_subscriber::{EnvFilter, Registry};
 
 #[tokio::main]
 async fn main() {
+    if !check_if_user() {
+        eprintln!("Dura cannot be run as root, to avoid data corruption");
+        process::exit(1);
+    }
+
     let cwd = std::env::current_dir().expect("Failed to get current directory");
 
     let suffix = option_env!("DURA_VERSION_SUFFIX")
@@ -246,6 +251,16 @@ fn unwatch_dir(path: &std::path::Path) {
     config.save();
 }
 
+#[cfg(all(unix))]
+fn check_if_user() -> bool {
+    sudo::check() != sudo::RunningAs::Root
+}
+
+#[cfg(target_os = "windows")]
+fn check_if_user() -> bool {
+    true
+}
+
 /// kills running dura poller
 ///
 /// poller's check to make sure that their pid is the same as the pid