feat: add error handling for database initialization

01.workspace/heave/src/fun/sqlite_init_db.rs

@@ -1,7 +1,7 @@
 use crate::*;
 use rusqlite::*;
 
-pub fn run(path: &path::Path) {
+pub fn run(path: &path::Path) -> result::Result<(), FailedTo> {
     let init_statement = r#"
         CREATE TABLE IF NOT EXISTS entity (
             id TEXT PRIMARY KEY,
@@ -22,11 +22,11 @@ pub fn run(path: &path::Path) {
         CREATE INDEX IF NOT EXISTS entity_class ON entity (class);
         CREATE INDEX IF NOT EXISTS attribute_id ON attribute (id);
         "#;
-    let connection = Connection::open(path).unwrap();
+    let connection = Connection::open(path).map_err(|_| FailedTo::OpenSQLiteConnection)?;
-    let _result = connection.execute_batch(init_statement);
+    connection
-    if _result.is_err() {
+        .execute_batch(init_statement)
-        panic!();
+        .map_err(|_| FailedTo::ExecuteSQLiteBatch)?;
-    }
+    Ok(())
 }
 
 #[cfg(test)]
@@ -36,6 +36,7 @@ mod unit_tests {
     fn test_call() {
         let tempfile = tempfile::NamedTempFile::new().unwrap();
         let path = tempfile.path();
-        run(path);
+        let result = run(path);
+        assert!(result.is_ok());
     }
 }

01.workspace/heave/src/lib.rs

@@ -11,6 +11,7 @@ pub use crate::str::attribute::O as Attribute;
 pub use crate::str::catalog::O as Catalog;
 pub use crate::str::entity::O as Entity;
 pub use crate::str::entity_state::E as EntityState;
+pub use crate::str::failed_to::E as FailedTo;
 pub use crate::str::value::E as Value;
 pub use crate::trt::eav::T as EAV;
 

01.workspace/heave/src/str/catalog.rs

@@ -24,9 +24,10 @@ impl O {
     }
 
     /// Initializes the database.
-    pub fn init(&self) {
+    pub fn init(&self) -> result::Result<(), FailedTo> {
         let path = path::Path::new(&self.path);
-        sqlite::init::db(path);
+        sqlite::init::db(path).map_err(|_| FailedTo::InitDatabase)?;
+        Ok(())
     }
 
     /// Inserts a single object that implements the `EAV` trait into the catalog.

01.workspace/heave/src/str/failed_to.rs

@@ -0,0 +1,6 @@
+#[derive(Debug, PartialEq, PartialOrd, Eq, Ord, Clone, Copy, Hash)]
+pub enum E {
+    ExecuteSQLiteBatch,
+    InitDatabase,
+    OpenSQLiteConnection,
+}

01.workspace/heave/src/str/mod.rs

@@ -2,4 +2,5 @@ pub mod attribute;
 pub mod catalog;
 pub mod entity;
 pub mod entity_state;
+pub mod failed_to;
 pub mod value;