use rustyline to replace readline

src/bin/completion.rs

@@ -0,0 +1,72 @@
+use failure::*;
+use serde_json::Value;
+
+use proxmox::{sortable, identity};
+use proxmox::api::*;
+use proxmox::api::schema::*;
+
+use proxmox_backup::cli::*;
+
+#[sortable]
+const API_METHOD_TEST_COMMAND: ApiMethod = ApiMethod::new(
+    &ApiHandler::Sync(&test_command),
+    &ObjectSchema::new(
+        "Test command.",
+        &sorted!([
+            ( "verbose", true, &BooleanSchema::new("Verbose output.").schema() ),
+        ])
+    )
+);
+
+fn test_command(
+    _param: Value,
+    _info: &ApiMethod,
+    _rpcenv: &mut dyn RpcEnvironment,
+) -> Result<Value, Error> {
+
+
+    Ok(Value::Null)
+}
+
+fn command_map() -> CliCommandMap {
+    let cmd_def = CliCommandMap::new()
+        .insert("ls", CliCommand::new(&API_METHOD_TEST_COMMAND).into())
+        .insert("test", CliCommand::new(&API_METHOD_TEST_COMMAND).into())
+        .insert("help", help_command_def().into());
+
+    cmd_def
+}
+
+
+fn main() -> Result<(), Error> {
+
+    let def = CommandLineInterface::Nested(command_map());
+
+    let helper = CliHelper::new(def);
+
+    let config = rustyline::config::Builder::new()
+    //.completion_type(rustyline::config::CompletionType::List)
+    //.completion_prompt_limit(0)
+        .build();
+
+    let mut rl = rustyline::Editor::<CliHelper>::with_config(config);
+    rl.set_helper(Some(helper));
+
+    while let Ok(line) = rl.readline("# prompt: ") {
+        let helper = rl.helper().unwrap();
+        // readline already handles tabs, so here we only split on spaces
+        let args = shellword_split(&line)?;
+
+        let def = helper.cmd_def();
+        let _ = match def {
+            CommandLineInterface::Simple(ref cli_cmd) => {
+                handle_simple_command(def, "", &cli_cmd, args)
+            }
+            CommandLineInterface::Nested(ref map) => {
+                handle_nested_command(def, "", &map, args)
+            }
+        };
+    }
+
+    Ok(())
+}