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-rw-r--r--src/db/lib.rs47
-rw-r--r--src/garage/cli/convert_db.rs25
2 files changed, 60 insertions, 12 deletions
diff --git a/src/db/lib.rs b/src/db/lib.rs
index fe44b01e..427140f9 100644
--- a/src/db/lib.rs
+++ b/src/db/lib.rs
@@ -171,6 +171,53 @@ impl Db {
}
}
+/// List of supported database engine types
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Engine {
+ #[cfg(feature = "lmdb")]
+ Lmdb,
+
+ #[cfg(feature = "sqlite")]
+ Sqlite,
+
+ #[cfg(feature = "sled")]
+ Sled,
+}
+
+impl std::fmt::Display for Engine {
+ fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
+ match self {
+ #[cfg(feature = "lmdb")]
+ Self::Lmdb => fmt.write_str("lmdb"),
+
+ #[cfg(feature = "sqlite")]
+ Self::Sqlite => fmt.write_str("sqlite"),
+
+ #[cfg(feature = "sled")]
+ Self::Sled => fmt.write_str("sled"),
+ }
+ }
+}
+
+impl std::str::FromStr for Engine {
+ type Err = Error;
+
+ fn from_str(text: &str) -> Result<Engine> {
+ match text {
+ #[cfg(feature = "lmdb")]
+ "lmdb" | "heed" => Ok(Self::Lmdb),
+
+ #[cfg(feature = "sqlite")]
+ "sqlite" | "sqlite3" | "rusqlite" => Ok(Self::Sqlite),
+
+ #[cfg(feature = "sled")]
+ "sled" => Ok(Self::Sled),
+
+ kind => Err(Error(format!("Invalid DB engine: {}", kind).into())),
+ }
+ }
+}
+
#[allow(clippy::len_without_is_empty)]
impl Tree {
#[inline]
diff --git a/src/garage/cli/convert_db.rs b/src/garage/cli/convert_db.rs
index 3b396c1b..d33010f4 100644
--- a/src/garage/cli/convert_db.rs
+++ b/src/garage/cli/convert_db.rs
@@ -14,14 +14,14 @@ pub struct ConvertDbOpt {
/// Input database engine (sled, lmdb or sqlite; limited by db engines
/// enabled in this build)
#[structopt(short = "a")]
- input_engine: String,
+ input_engine: Engine,
/// Output database path
#[structopt(short = "o")]
output_path: PathBuf,
/// Output database engine
#[structopt(short = "b")]
- output_engine: String,
+ output_engine: Engine,
#[structopt(flatten)]
output_open: OpenDbOpt,
@@ -47,28 +47,32 @@ pub struct OpenLmdbOpt {
}
pub(crate) fn do_conversion(args: ConvertDbOpt) -> Result<()> {
- let input = open_db(args.input_path, args.input_engine, OpenDbOpt::default())?;
- let output = open_db(args.output_path, args.output_engine, args.output_open)?;
+ if args.input_engine == args.output_engine {
+ return Err(Error("input and output database engine must differ".into()));
+ }
+
+ let input = open_db(args.input_path, args.input_engine, &args.output_open)?;
+ let output = open_db(args.output_path, args.output_engine, &args.output_open)?;
output.import(&input)?;
Ok(())
}
-fn open_db(path: PathBuf, engine: String, open: OpenDbOpt) -> Result<Db> {
- match engine.as_str() {
+fn open_db(path: PathBuf, engine: Engine, open: &OpenDbOpt) -> Result<Db> {
+ match engine {
#[cfg(feature = "sled")]
- "sled" => {
+ Engine::Sled => {
let db = sled_adapter::sled::Config::default().path(&path).open()?;
Ok(sled_adapter::SledDb::init(db))
}
#[cfg(feature = "sqlite")]
- "sqlite" | "sqlite3" | "rusqlite" => {
+ Engine::Sqlite => {
let db = sqlite_adapter::rusqlite::Connection::open(&path)?;
db.pragma_update(None, "journal_mode", &"WAL")?;
db.pragma_update(None, "synchronous", &"NORMAL")?;
Ok(sqlite_adapter::SqliteDb::init(db))
}
#[cfg(feature = "lmdb")]
- "lmdb" | "heed" => {
+ Engine::Lmdb => {
std::fs::create_dir_all(&path).map_err(|e| {
Error(format!("Unable to create LMDB data directory: {}", e).into())
})?;
@@ -87,8 +91,5 @@ fn open_db(path: PathBuf, engine: String, open: OpenDbOpt) -> Result<Db> {
let db = env_builder.open(&path)?;
Ok(lmdb_adapter::LmdbDb::init(db))
}
- e => Err(Error(
- format!("Invalid or unsupported DB engine: {}", e).into(),
- )),
}
}