Creating a DB handle.

src/db/init.rs

@@ -0,0 +1,19 @@
+use std::path::Path;
+
+use rusqlite::Connection;
+
+static DB_INIT_QUERY: &str = include_str!("../../migrations/01_init.sql");
+
+pub struct DbHandle {
+    conn: Connection,
+}
+
+impl DbHandle {
+    pub fn new<P: AsRef<Path>>(db_path: P) -> Result<DbHandle, Box<dyn std::error::Error>> {
+        let mut conn: Connection = Connection::open(db_path).unwrap();
+        let tx = conn.transaction()?;
+        tx.execute_batch(DB_INIT_QUERY).unwrap();
+        tx.commit().unwrap();
+        Ok(DbHandle { conn })
+    }
+}

src/db/mod.rs

@@ -0,0 +1,3 @@
+mod init;
+
+pub(crate) use init::DbHandle;

src/main.rs

@@ -1,3 +1,10 @@
-fn main() {
-    println!("Hello, world!");
+mod db;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let db_path = std::env::args()
+        .nth(1)
+        .ok_or("Pass path to sqlite DB in first parameter.")?;
+    let mut db_conn: db::DbHandle = db::DbHandle::new(db_path)?;
+    println!("Done.");
+    Ok(())
 }