prevent ssd extra writes if the post file is up to date

src/nex.rs

@@ -133,7 +133,20 @@ impl Nex {
                 .format(&self.filename.trim_matches(std::path::MAIN_SEPARATOR))
                 .to_string(),
         );
-        fs::write(p, c)?; // @TODO skip overwrite operations
+
+        // safe SSD by prevent extra writes
+        let f = p.to_string_lossy();
+        if fs::exists(&p)? {
+            if fs::read_to_string(&p)? != c {
+                fs::write(&p, c)?;
+                println!("\t\t\tpost file `{f}` updated with new content.")
+            } else {
+                println!("\t\t\tpost file `{f}` is up to date.")
+            }
+        } else {
+            fs::write(&p, c)?;
+            println!("\t\t\tcreated new post file `{f}`.")
+        }
 
         Ok(())
     }