ci: migrate e2e runner to Go

[tamas-jozsa]

Go-Based E2E Test Runner

Replaces bash-based e2e tests with a robust Go CLI tool for testing v4→v5
migrations.

Key Features

CLI Commands:

• e2e run - Full e2e test suite with drift detection
• e2e init - Initialize test resources from integration testdata
• e2e migrate - Run migration with tf-migrate
• e2e bootstrap - Migrate local state to R2 backend
• e2e clean - Remove modules from remote state

Improvements:

• ✅ Credential sanitization - Prevents API keys/secrets from leaking in logs
• ✅ Drift detection with configurable exemptions (e2e/drift-exemptions.yaml)
• ✅ Colored output with clear success/failure indicators
• ✅ Resource filtering - Test specific resources: --resources custom_pages,load_balancer_monitor
• ✅ 88 unit tests with comprehensive coverage

Project Structure

cmd/
├── tf-migrate/ # Main binary
└── e2e-runner/ # E2E test runner
internal/
└── e2e-runner/ # E2E implementation + tests
e2e/
├── drift-exemptions.yaml
└── tf/v4/ # Test fixtures
bin/ # Built binaries

Usage

# Run full e2e test suite
./scripts/run-e2e-tests --apply-exemptions

# Or use binary directly
make build-all
./bin/e2e-runner run --resources custom_pages

# Clean up state
./bin/e2e-runner clean --modules load_balancer_monitor

Testing

make test          # tf-migrate tests
make test-e2e      # e2e-runner tests (88 tests)
make build-all     # Build both binaries