feat: Introduce a working key-value based database

examples/search-index.rs

@@ -0,0 +1,40 @@
+use std::error::Error;
+use std::path::PathBuf;
+use std::io::{self, Write};
+
+use elapsed::measure_time;
+use structopt::StructOpt;
+use pentium::index::Index;
+
+#[derive(Debug, StructOpt)]
+pub struct Cmd {
+    /// Index path (e.g. relaxed-colden).
+    #[structopt(parse(from_os_str))]
+    pub index_path: PathBuf,
+}
+
+fn main() -> Result<(), Box<Error>> {
+    let command = Cmd::from_args();
+    let index = Index::open(command.index_path)?;
+
+    loop {
+        print!("Searching for: ");
+        io::stdout().flush()?;
+
+        let mut query = String::new();
+        io::stdin().read_line(&mut query)?;
+
+        if query.is_empty() { break }
+
+        let (elapsed, result) = measure_time(|| index.search(&query));
+        match result {
+            Ok(documents) => {
+                println!("{:?}", documents);
+                println!("Finished in {}", elapsed)
+            },
+            Err(e) => panic!("{}", e),
+        }
+    }
+
+    Ok(())
+}