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use std::path::PathBuf;
use structopt::StructOpt;
use garage_db::*;
/// K2V command line interface
#[derive(StructOpt, Debug)]
pub struct ConvertDbOpt {
/// Input database path (not the same as metadata_dir, see
/// https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#db-engine-since-v0-8-0)
#[structopt(short = "i")]
input_path: PathBuf,
/// Input database engine (sled, lmdb or sqlite; limited by db engines
/// enabled in this build)
#[structopt(short = "a")]
input_engine: String,
/// Output database path
#[structopt(short = "o")]
output_path: PathBuf,
/// Output database engine
#[structopt(short = "b")]
output_engine: String,
}
pub(crate) fn do_conversion(args: ConvertDbOpt) -> Result<()> {
let input = open_db(args.input_path, args.input_engine)?;
let output = open_db(args.output_path, args.output_engine)?;
output.import(&input)?;
Ok(())
}
fn open_db(path: PathBuf, engine: String) -> Result<Db> {
match engine.as_str() {
#[cfg(feature = "sled")]
"sled" => {
let db = sled_adapter::sled::Config::default().path(&path).open()?;
Ok(sled_adapter::SledDb::init(db))
}
#[cfg(feature = "sqlite")]
"sqlite" | "sqlite3" | "rusqlite" => {
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" => {
std::fs::create_dir_all(&path).map_err(|e| {
Error(format!("Unable to create LMDB data directory: {}", e).into())
})?;
let map_size = lmdb_adapter::recommended_map_size();
let mut env_builder = lmdb_adapter::heed::EnvOpenOptions::new();
env_builder.max_dbs(100);
env_builder.map_size(map_size);
unsafe {
env_builder.flag(lmdb_adapter::heed::flags::Flags::MdbNoMetaSync);
}
let db = env_builder.open(&path)?;
Ok(lmdb_adapter::LmdbDb::init(db))
}
e => Err(Error(
format!("Invalid or unsupported DB engine: {}", e).into(),
)),
}
}
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