feat: add new subcommand to open default editor with metadata

src/edit.rs

@@ -0,0 +1,31 @@
+use lofty::tag::Tag;
+use std::env::var;
+use std::io::Write;
+use std::path::PathBuf;
+use std::{fs::File, io::Read, process::Command};
+
+pub fn edit(file_path: PathBuf, tag: Tag) -> std::io::Result<()> {
+    let editor = var("EDITOR").unwrap();
+    let mut file = File::create(&file_path)?;
+    for item in tag.items() {
+        writeln!(
+            file,
+            "{:?} = {:?}",
+            item.key(),
+            item.value().text().unwrap_or("")
+        )?;
+    }
+
+    Command::new(editor)
+        .arg(&file_path)
+        .status()
+        .expect("Something went wrong");
+
+    let mut editable = String::new();
+    let _ = File::open(file_path)
+        .expect("Could not open file")
+        .read_to_string(&mut editable);
+
+    println!("File content:\n{}", editable);
+    Ok(())
+}