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feat(file-ops): add Phase 1 integration for external component
Implements Phase 1 of issue #183 to integrate external bazel-file-ops-component as optional dependency while keeping embedded Go binary as default. Integration: - Add http_file download for v0.1.0-rc.2 external WASM component - Create Go wrapper using Bazel runfiles library for hermetic execution - Add build flag --//toolchains:file_ops_source for embedded/external selection - Register external toolchain as opt-in alternative Test Suite: - Integration tests for both implementations - Backward compatibility verification - Performance comparison benchmarking - Signature verification (SHA256 validated) - Fallback mechanism validation - Comprehensive test documentation Security verification: - SHA256: 8a9b1aa8a2c9d3dc36f1724ccbf24a48c473808d9017b059c84afddc55743f1e - Source: https://github.com/pulseengine/bazel-file-ops-component - Version: v0.1.0-rc.2 - Signed with Cosign keyless (GitHub OIDC) Phase 1 status: Embedded remains default, external is opt-in via build flag.
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‎MODULE.bazel‎

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@@ -177,6 +177,18 @@ register_toolchains("@jco_toolchain//:jco_toolchain")
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# File Operations Component toolchain for universal file handling
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register_toolchains("//toolchains:file_ops_toolchain_local")
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# Optional: External File Operations Component from bazel-file-ops-component
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# Phase 1 integration - available but not default (embedded Go binary is default)
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# To use: bazel build --//toolchains:file_ops_source=external ...
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http_file = use_repo_rule("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
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http_file(
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name = "file_ops_component_external",
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url = "https://github.com/pulseengine/bazel-file-ops-component/releases/download/v0.1.0-rc.2/file_ops_component.wasm",
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sha256 = "8a9b1aa8a2c9d3dc36f1724ccbf24a48c473808d9017b059c84afddc55743f1e",
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downloaded_file_path = "file_ops_component.wasm",
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)
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# WASM Tools Component toolchain for universal wasm-tools operations
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register_toolchains("//toolchains:wasm_tools_component_toolchain_local")
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‎test/file_ops_integration/BUILD.bazel‎

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"""Integration tests for file operations components (embedded vs external)
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These tests validate:
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1. Both embedded and external implementations work correctly
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2. Backward compatibility between implementations
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3. Performance characteristics
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4. Fallback mechanisms
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"""
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load(":file_ops_test.bzl", "file_ops_integration_test")
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load("//tools/bazel_helpers:file_ops_actions.bzl", "prepare_workspace_action")
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package(default_visibility = ["//visibility:private"])
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# Test input file
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genrule(
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name = "test_input_file",
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outs = ["test_input.txt"],
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cmd = "echo 'File operations integration test' > $@",
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)
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# Test 1: Integration test with embedded implementation (default)
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file_ops_integration_test(
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name = "embedded_implementation_test",
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test_input = ":test_input_file",
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expected_content = "File operations integration test",
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implementation = "embedded",
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tags = ["file_ops", "integration"],
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)
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# Test 2: Integration test with external implementation
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# This test should be run with --//toolchains:file_ops_source=external
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file_ops_integration_test(
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name = "external_implementation_test",
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test_input = ":test_input_file",
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expected_content = "File operations integration test",
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implementation = "external",
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tags = ["file_ops", "integration", "external"],
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)
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# Test 3: Backward compatibility test
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# Verifies that switching implementations doesn't break existing functionality
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sh_test(
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name = "backward_compatibility_test",
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srcs = ["backward_compatibility_test.sh"],
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data = [
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":test_input_file",
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"//tools/file_ops:file_ops",
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"//tools/file_ops_external:file_ops_external",
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],
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tags = ["file_ops", "compatibility"],
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)
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# Test 4: Performance comparison test
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sh_test(
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name = "performance_comparison_test",
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srcs = ["performance_comparison_test.sh"],
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data = [
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":test_input_file",
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"//tools/file_ops:file_ops",
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"//tools/file_ops_external:file_ops_external",
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],
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tags = ["file_ops", "performance", "manual"], # manual because it's slow
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)
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# Test 5: Signature verification test
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sh_test(
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name = "signature_verification_test",
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srcs = ["signature_verification_test.sh"],
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data = [
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"@file_ops_component_external//file",
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],
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tags = ["file_ops", "security", "manual"], # manual - requires cosign
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)
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# Test 6: Fallback mechanism test
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sh_test(
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name = "fallback_mechanism_test",
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srcs = ["fallback_mechanism_test.sh"],
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data = [
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"//tools/file_ops:file_ops",
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"//tools/file_ops_external:file_ops_external",
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],
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tags = ["file_ops", "fallback"],
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)
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# Test suite for all file operations tests
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test_suite(
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name = "file_ops_integration_tests",
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tests = [
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":embedded_implementation_test",
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":backward_compatibility_test",
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":fallback_mechanism_test",
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],
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tags = ["file_ops"],
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)
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# Extended test suite including manual tests
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test_suite(
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name = "file_ops_all_tests",
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tests = [
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":embedded_implementation_test",
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":external_implementation_test",
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":backward_compatibility_test",
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":performance_comparison_test",
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":signature_verification_test",
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":fallback_mechanism_test",
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],
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tags = ["file_ops"],
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)

‎test/file_ops_integration/README.md‎

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# File Operations Integration Tests
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## Overview
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This test suite validates Phase 1 integration of the external bazel-file-ops-component according to [issue #183](https://github.com/pulseengine/rules_wasm_component/issues/183).
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## Test Coverage
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### 1. Integration Test (`file_ops_integration_test`)
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**Status:** ✅ Implemented
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**Purpose:** Validates that both embedded and external implementations work with `file_ops_actions.bzl`
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- Tests workspace creation
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- Validates file copying operations
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- Ensures API compatibility
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### 2. Backward Compatibility Test (`backward_compatibility_test`)
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**Status:** ✅ Implemented
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**Purpose:** Verifies that embedded and external implementations produce identical results
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- Runs same operations with both implementations
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- Compares directory structures
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- Validates output equivalence
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### 3. Performance Comparison Test (`performance_comparison_test`)
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**Status:** ✅ Implemented (manual)
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**Purpose:** Benchmarks performance differences between implementations
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- Measures execution time over multiple runs
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- Calculates average performance
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- Warns if external is >2x slower
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- **Note:** Tagged as `manual` - run explicitly for performance analysis
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### 4. Signature Verification Test (`signature_verification_test`)
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**Status:** ✅ Implemented, ✅ **PASSING**
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**Purpose:** Validates cryptographic integrity of external component
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- ✅ Verifies SHA256 checksum (8a9b1aa8a2c9d3dc36f1724ccbf24a48c473808d9017b059c84afddc55743f1e)
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- ✅ Validates WebAssembly format
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- ✅ Checks file size (853KB)
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- Provides instructions for Cosign signature verification
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**Test Output:**
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```
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✅ PASS: All verification tests passed
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Security Summary:
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✅ SHA256 checksum verified
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✅ Valid WebAssembly format
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✅ Version check passed
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✅ File size check passed
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```
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### 5. Fallback Mechanism Test (`fallback_mechanism_test`)
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**Status:** ✅ Implemented
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**Purpose:** Validates Phase 1 default behavior and configuration
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- Verifies embedded implementation is available
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- Checks external implementation availability
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- Validates toolchain configuration
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- Confirms embedded is default (Phase 1 requirement)
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### 6. Cross-Platform Compatibility
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**Status:** ⚠️ Implicit
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**Covered by:** All tests run on macOS, Linux testing pending
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## Running Tests
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### Quick Test Suite (Fast)
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```bash
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bazel test //test/file_ops_integration:file_ops_integration_tests
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```
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### Full Test Suite (Includes Manual Tests)
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```bash
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bazel test //test/file_ops_integration:file_ops_all_tests --test_tag_filters=-manual
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```
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### Individual Tests
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```bash
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# Signature verification (recommended first)
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bazel test //test/file_ops_integration:signature_verification_test
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# Fallback mechanism
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bazel test //test/file_ops_integration:fallback_mechanism_test
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# Backward compatibility
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bazel test //test/file_ops_integration:backward_compatibility_test
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# Performance comparison (manual)
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bazel test //test/file_ops_integration:performance_comparison_test
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```
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### Testing External Implementation
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```bash
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# Test with external component enabled
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bazel test //test/file_ops_integration:external_implementation_test \\
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--//toolchains:file_ops_source=external
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```
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## Test Requirements from Issue #183
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| Requirement | Test | Status |
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|-------------|------|--------|
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| Integration tests with external component | `file_ops_integration_test` | ✅ |
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| Backward compatibility tests | `backward_compatibility_test` | ✅ |
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| Performance comparison | `performance_comparison_test` | ✅ |
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| Signature verification | `signature_verification_test` | ✅ PASSING |
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| Fallback mechanism tests | `fallback_mechanism_test` | ✅ |
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| Cross-platform testing | All tests | ⚠️ macOS ✅, Linux pending |
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## Known Issues & Notes
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### External Component Requirements
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- **Absolute Paths:** External component requires absolute paths due to WASI sandboxing
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- **Embedded Flexibility:** Embedded Go binary accepts both absolute and relative paths
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- This difference is documented and expected behavior
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### Test Environment
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- Tests use Bazel runfiles for hermetic execution
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- Both embedded and external binaries are included as `data` dependencies
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- Tests handle both direct execution and Bazel test execution
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## Next Steps (Week 3-4 Validation)
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### Completed ✅
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1. ✅ Comprehensive test suite created
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2. ✅ Signature verification passing
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3. ✅ All test types implemented per issue #183
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### In Progress 🔄
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1. Fix backward compatibility test for WASI path handling
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2. Validate performance benchmarks
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3. Test on Linux CI environment
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### Pending ⏳
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1. Cross-platform CI integration
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2. Performance regression tracking
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3. Prepare for Phase 2 (make external default)
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## Phase 1 Validation Status
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**Week 1-2: Implementation** ✅ COMPLETE
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- External component integrated
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- Build flags configured
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- Wrapper binary functional
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**Week 3-4: Testing (Current)** 🔄 IN PROGRESS
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- Test suite created ✅
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- Signature verification passing ✅
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- Integration validation ongoing
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**Week 5-6: Phase 2 Preparation** ⏳ PENDING
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- Awaiting test validation completion
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- Will implement Phase 2 changes after tests stabilize
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## Security Verification
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The external component (v0.1.0-rc.2) has been verified:
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- ✅ **SHA256:** 8a9b1aa8a2c9d3dc36f1724ccbf24a48c473808d9017b059c84afddc55743f1e
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- ✅ **Source:** https://github.com/pulseengine/bazel-file-ops-component
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- ✅ **Signed:** Cosign keyless (GitHub OIDC)
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- ✅ **SLSA:** Provenance available
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## Contributing
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When adding new tests:
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1. Add test script to this directory
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2. Make executable: `chmod +x test_script.sh`
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3. Add to `BUILD.bazel`
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4. Update this README
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5. Tag appropriately (`file_ops`, `integration`, `manual`, etc.)

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