rename appmgr

backend/src/disk/mount/filesystem/label.rs

@@ -0,0 +1,42 @@
+use std::path::Path;
+
+use async_trait::async_trait;
+use digest::generic_array::GenericArray;
+use digest::Digest;
+use sha2::Sha256;
+
+use super::FileSystem;
+use crate::util::Invoke;
+use crate::Error;
+
+pub async fn mount_label(label: &str, mountpoint: impl AsRef<Path>) -> Result<(), Error> {
+    tokio::fs::create_dir_all(mountpoint.as_ref()).await?;
+    tokio::process::Command::new("mount")
+        .arg("-L")
+        .arg(label)
+        .arg(mountpoint.as_ref())
+        .invoke(crate::ErrorKind::Filesystem)
+        .await?;
+    Ok(())
+}
+
+pub struct Label<S: AsRef<str>> {
+    label: S,
+}
+impl<S: AsRef<str>> Label<S> {
+    pub fn new(label: S) -> Self {
+        Label { label }
+    }
+}
+#[async_trait]
+impl<S: AsRef<str> + Send + Sync> FileSystem for Label<S> {
+    async fn mount<P: AsRef<Path> + Send + Sync>(&self, mountpoint: P) -> Result<(), Error> {
+        mount_label(self.label.as_ref(), mountpoint).await
+    }
+    async fn source_hash(&self) -> Result<GenericArray<u8, <Sha256 as Digest>::OutputSize>, Error> {
+        let mut sha = Sha256::new();
+        sha.update("Label");
+        sha.update(self.label.as_ref().as_bytes());
+        Ok(sha.finalize())
+    }
+}