build-zowex-command

name: build-zowex-command description: Guides users through creating new zowex commands across the Zowe Remote SSH stack (native C++, server, SDK). Use when the user wants to add a new command, implement a zowex command, or add functionality to the native backend.

Building a New Zowex Command

This skill guides the creation of a new command for the Zowe Remote SSH stack, covering the C++ implementation, middleware layer, and SDK.

1. Native CLI Implementation (zowex)

Commands are loosely organized by command group in native/c/commands/.

Locate or Create Command Files

• For an existing command group (e.g., ds, job, uss): Update the existing native/c/commands/<group>.hpp and <group>.cpp.
• For a new command group: Create new files native/c/commands/<group>.hpp and <group>.cpp.

For the command implementation:

• Use int handle_<name>(InvocationContext &context) for logic.
• Use context.get<T>("argName", defaultValue) to parse arguments.
• Crucial: Always set a return object using context.set_object(result) for programmatic access.
• Return RTNCD_SUCCESS, RTNCD_WARNING, or RTNCD_FAILURE.
• Register the command inside void register_commands(parser::Command &root_command) using Command and add_option().

Register Command Group

(Only required if creating a new command group) Update native/c/zowex.cpp:

1. #include "commands/<group>.hpp"
2. Call <group>::register_commands(arg_parser.get_root_command()); in main().

Update Makefile

(Only required if creating a new command group) Add commands/<group>.o to COMMAND_OBJS in native/c/makefile.

2. Server Implementation (zowex server) [Optional]

(Optional: Not all commands need to be exposed through the server) Expose the command via JSON-RPC over SSH.

Define RPC Types

Update or create packages/sdk/src/doc/rpc/<group>.ts:

• Define <Name>Request extending common.CommandRequest.
• Define <Name>Response extending common.CommandResponse.
• If new, export it in packages/sdk/src/doc/rpc/index.ts.
• Run npm run build:types to generate C++ schemas.

Register with Server

Update native/c/server/rpc_commands.cpp:

1. Ensure #include "../c/commands/<group>.hpp" is present.
2. In the void register_<group>_commands(CommandDispatcher &dispatcher) function (create it if missing), register your command:

   dispatcher.register_command("methodName", 
       CommandBuilder(<group>::handle_<name>)
           .validate<<Name>Request, <Name>Response>()
   );
   

   Note: Middleware automatically converts camelCase RPC parameters to kebab-case CLI arguments.
3. If this is a new group, call your registration function in register_all_commands().

3. SDK Integration [Optional]

Update packages/sdk/src/RpcClientApi.ts:

• Ensure your group's types are imported from ./doc/rpc.
• Add a method to the corresponding group property in RpcClientApi (create the property if it's a new group):

  public <group> = {
    // ... existing methods
    methodName: this.rpc<<group>.<Name>Request, <group>.<Name>Response>("methodName"),
  };
  

4. Testing Workflow

1. Upload and build native code: npm run z:upload && npm run z:build (or npm run z:rebuild)
2. Build SDK: cd packages/sdk && npm run build
3. Test native locally on z/OS (./zowex <command>) or via a TypeScript SDK script.

Reference Implementation

For a complete working example, check out the examples/add-new-command directory.