refactor: relocate CLI to a dedicated directory (#5101)

* refactor: relocate CLI to a dedicated directory

* chore: expose method and const

* refactor: use BoxedError

* chore: expose DatabaseClient

* chore: add clone derive

src/plugins/Cargo.toml

@@ -9,7 +9,10 @@ workspace = true
 
 [dependencies]
 auth.workspace = true
+clap.workspace = true
+cli.workspace = true
 common-base.workspace = true
+common-error.workspace = true
 datanode.workspace = true
 frontend.workspace = true
 meta-srv.workspace = true

src/plugins/src/cli.rs

@@ -0,0 +1,36 @@
+// Copyright 2023 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use clap::Parser;
+use cli::{BenchTableMetadataCommand, ExportCommand, ImportCommand, Tool};
+use common_error::ext::BoxedError;
+
+#[derive(Parser)]
+pub enum SubCommand {
+    // Attach(AttachCommand),
+    Bench(BenchTableMetadataCommand),
+    Export(ExportCommand),
+    Import(ImportCommand),
+}
+
+impl SubCommand {
+    pub async fn build(&self) -> std::result::Result<Box<dyn Tool>, BoxedError> {
+        match self {
+            // SubCommand::Attach(cmd) => cmd.build().await,
+            SubCommand::Bench(cmd) => cmd.build().await,
+            SubCommand::Export(cmd) => cmd.build().await,
+            SubCommand::Import(cmd) => cmd.build().await,
+        }
+    }
+}

src/plugins/src/lib.rs

@@ -12,11 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+mod cli;
 mod datanode;
 mod frontend;
 mod meta_srv;
 mod options;
 
+pub use cli::SubCommand;
 pub use datanode::{setup_datanode_plugins, start_datanode_plugins};
 pub use frontend::{setup_frontend_plugins, start_frontend_plugins};
 pub use meta_srv::{setup_metasrv_plugins, start_metasrv_plugins};