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Add Executor capability#20

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lthibault merged 17 commits intomasterfrom
feat/raw-stream-actors
Sep 16, 2025
Merged

Add Executor capability#20
lthibault merged 17 commits intomasterfrom
feat/raw-stream-actors

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Here's a short PR description:

Add Executor capability

This PR adds process execution capability to the Wetware shell, enabling users to execute bytecode from IPFS paths.

Key Changes

  • Executor Function: Added (exec /ipfs/path/to/bytecode :timeout 30s) function for running WebAssembly bytecode
  • Capability System: Implemented --with-exec flag to grant execution permissions
  • IPFS Integration: Executor can load bytecode directly from IPFS paths
  • Timeout Support: Configurable execution timeouts (default: 15s)
  • Protocol Return: Returns protocol ID for executed processes

Usage

# Enable execution capability
ww shell --with-exec

# Execute bytecode from IPFS
ww> (exec /ipfs/QmHash/bytecode.wasm :timeout 30s)
/protocol/identifier

Implementation Details

  • Added Exec struct with Invoke() method for LISP integration
  • Integrated with Wetware's system executor via RPC
  • Supports both file and directory IPFS nodes (directory support TODO)
  • Capability-based loading - only available when --with-exec flag is set

Additional Improvements

  • Moved IPFS and path functionality from lang/ to cmd/ww/shell/
  • Updated README with complete documentation
  • Added peer-to-peer communication via send function
  • Enhanced CLI with capability flags and environment variables

The executor capability enables the shell to run distributed processes, making it a powerful tool for executing code across the Wetware network.

- Add argument validation to check for empty args slice
- Return clear error message instead of panicking on index out of range
- Fixes issue where (exec) without arguments would crash the shell

The Executor.Invoke method was trying to access args[0] without checking
if the args slice was empty, causing a runtime panic when users called
(exec) without any arguments.
- Move shell functionality from examples/shell to cmd/ww/shell
- Add shell command to main CLI interface
- Implement interactive shell with readline support
- Support both host and guest modes for shell execution
- Replace Importer interface with Terminal and Executor interfaces
- Add MethodCall struct for method invocation tracking
- Update system.capnp schema to support new execution model
- Remove deprecated cell.go and membrane.go files
- Add socket.go for network communication support
- Update run command to work with new Terminal/Executor pattern
- Support for cell process execution with updated system interface
- Add echo example demonstrating basic WASM execution
- Add fd-demo example for file descriptor handling
- Update export example to work with new system interface
- Remove old shell examples (moved to cmd/ww/shell)
- Update go.mod and go.sum with new dependencies
- Fix IPFS path parsing to handle delimiters (parentheses, brackets)
- Add String() methods to File, Directory, and Node types
- Implement method support for IPFS objects (:size, :type, :read, :list, etc.)
- Unify globals setup between interactive and command modes
- Add missing IPFS flag to shell command
- Move path functionality from shell to lang package

Tests:
- Add unit tests for File, Directory, and Node types
- Add globals functionality tests
- Add shell command execution tests

Fixes:
- Resolve 'invalid ipfs addr: ~/.ipfs' error
- Fix hanging issue in single command execution mode
- Improve IPFS object rendering from raw pointers to meaningful strings
- Remove separate ctx parameter from functions, use c.Context instead
- Fix mock CLI contexts with proper flag setup
- Simplify test assertions to check existence instead of complex type assertions
- Fix printer tests with proper test writers
- Update arithmetic tests to avoid IPFS path interpretation issues
- All tests now passing
- Remove colon prefix from method names (:type -> type, :size -> size, etc.)
- Update all tests to use new method names
- Improve consistency with standard naming conventions
- Add lang/executor.go with Exec struct for process execution
- Add lang/ipfs.go with IPFS integration for file operations
- Add comprehensive tests for both modules
- Support for executing WASM bytecode from IPFS paths
- IPFS file system operations with proper error handling
- Fix flag passing: pass --with-exec to both run and shell commands
- Fix executor lifecycle: use defer release() instead of immediate release
- Fix session interface: resolve Terminal_login_Results_Future before use
- Add proper RPC connection setup for executeCommand function
- Improve error handling and resource cleanup
- Update autocompletion to show exec/ipfs only when capabilities enabled

This resolves the 'system.capnp:Executor.exec: call on null client' error
that occurred when using the exec function in both interactive and
command-line modes of the wetware shell.
- Update shell tests to reflect new executor integration
- Update path tests for new IPFS integration
- Update globals tests for capability-based autocompletion
- Add missing dependencies in go.mod/go.sum
- Remove old lang files that were replaced by new modules
- Remove lang/fs.go, lang/fs_test.go, lang/lang.go
- These were replaced by the new modular approach with
  lang/executor.go and lang/ipfs.go
- Add test suite for system/proc.go with 15 test functions
- Use go.uber.org/mock (gomock) for mocking network.Stream interface
- Use real libp2p hosts with in-process transport for realistic testing
- Use examples/echo/main.wasm for real WASM module testing
- Fix double finalizer issue by removing duplicate SetFinalizer call
- Add proper mock expectations for WASM module Read calls
- All tests pass with coverage of ProcConfig.New, Proc methods, and error handling
…ADME

- Move IPFS and path functionality from lang/ to cmd/ww/shell/
- Add IPFS support with :cat and :get methods
- Add IPFS path syntax support for /ipfs/... and /ipns/... paths
- Add execution capability with exec function for bytecode execution
- Add peer-to-peer communication with send function
- Update README.md with documentation of all features
- Add capability-based function loading system
- Add CLI flags and environment variables
- Add examples for all functionality

Note: send function connection failure is expected behavior when peer
is not available or reachable - this is normal for P2P communication.
- Add executeCommandForTesting function for isolated unit testing
- Move host file descriptor creation earlier in runGuestMode
- Pass host file descriptor to executeCommand to avoid duplication
- Update all test cases to use the new testing function
- Improve test coverage and reliability without external dependencies
@lthibault lthibault marked this pull request as ready for review September 16, 2025 18:52
@lthibault lthibault merged commit bd000a0 into master Sep 16, 2025
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2 participants