3 files changed, 28 insertions, 0 deletions

diff --git a/src/util/fs.rs b/src/util/fs.rs
new file mode 100644
index 0000000..b86c0d7
--- /dev/null
+++ b/src/util/fs.rs
@@ -0,0 +1,12 @@
+#![allow(dead_code)]
+
+use std::path::Path;
+
+use crate::errors::McError;
+
+pub async fn remove_if_exists(path: &Path) -> Result<(), McError> {
+    if path.exists() {
+        tokio::fs::remove_file(path).await?;
+    }
+    Ok(())
+}
diff --git a/src/util/mod.rs b/src/util/mod.rs
new file mode 100644
index 0000000..8176b9b
--- /dev/null
+++ b/src/util/mod.rs
@@ -0,0 +1,2 @@
+pub mod fs;
+pub mod sha1;
diff --git a/src/util/sha1.rs b/src/util/sha1.rs
new file mode 100644
index 0000000..c5f1021
--- /dev/null
+++ b/src/util/sha1.rs
@@ -0,0 +1,14 @@
+#![allow(dead_code)]
+
+use std::path::Path;
+
+use sha1::{Digest, Sha1};
+
+use crate::errors::McError;
+
+pub async fn sha1_hex(path: &Path) -> Result<String, McError> {
+    let data = tokio::fs::read(path).await?;
+    let mut hasher = Sha1::new();
+    hasher.update(&data);
+    Ok(format!("{:x}", hasher.finalize()))
+}