feat: Add --digest CLI option to select digest type

src/main.rs

@@ -105,9 +105,17 @@ struct ItemArgs {
     #[arg(help("Set metadata for the item using the format KEY=[VALUE], the metadata will be removed if VALUE is not provided"))]
     meta: Vec<KeyValue>,
 
+    #[arg(help_heading("Item Options"), short, long, env("KEEP_DIGEST"))]
+    #[arg(help("Digest algorithm to use when saving items"))]
+    digest: Option<String>,
+
     #[arg(help_heading("Item Options"), short, long, env("KEEP_COMPRESSION"))]
     #[arg(help("Compression algorithm to use when saving items"))]
     compression: Option<String>,
+
+    #[arg(help_heading("Item Options"), short, long, env("KEEP_DIGEST"))]
+    #[arg(help("Digest algorithm to use when saving items"))]
+    digest: Option<String>,
 }
 
 #[derive(Parser, Debug)]

src/modes/save.rs

@@ -35,6 +35,13 @@ pub fn mode_save(
         tags.push("none".to_string());
     }
 
+    // Get the digest type to use
+    let digest_name = args
+        .item
+        .digest
+        .clone()
+        .unwrap_or(DigestType::Sha256.to_string());
+
     let compression_name = args
         .item
         .compression
@@ -55,7 +62,8 @@ pub fn mode_save(
     debug!("MAIN: Compression type: {}", compression_type);
 
     // Create a new digest engine
-    let digest_type = DigestType::Sha256;
+    let digest_type = DigestType::from_str(&digest_name)
+        .unwrap_or(DigestType::Sha256);
     let mut digest_engine = get_engine(digest_type);
     
     let mut item = db::Item {

src/tests.rs

@@ -57,6 +57,37 @@ mod tests {
             cmd,
             output.status
         );
+
+        // Test with digest option
+        let cmd = format!("echo {} | {} --digest sha256 -c none none", INPUT_A, env);
+        println!("RUNNING: {}", cmd);
+        let output = run_sh(cmd.as_str());
+        assert!(
+            output.status.success(),
+            "Command failed: {}  {}",
+            cmd,
+            output.status
+        );
+
+        let cmd = format!("echo {} | {} --digest md5 -c none none", INPUT_A, env);
+        println!("RUNNING: {}", cmd);
+        let output = run_sh(cmd.as_str());
+        assert!(
+            output.status.success(),
+            "Command failed: {}  {}",
+            cmd,
+            output.status
+        );
+
+        let cmd = format!("echo {} | {} --digest program -p md5sum -c none none", INPUT_A, env);
+        println!("RUNNING: {}", cmd);
+        let output = run_sh(cmd.as_str());
+        assert!(
+            output.status.success(),
+            "Command failed: {}  {}",
+            cmd,
+            output.status
+        );
     }
 
     // Helper function to check if a file exists in the data directory