ocpsync v1.0.0

Added

• Download OCP binaries from mirror.openshift.com for specified versions
• Download RHCOS images from mirror.openshift.com for specified versions
• SHA-256 checksum validation for all downloaded files
• Configurable file filtering to exclude unwanted platform variants
• Exponential backoff retry logic for failed downloads
• YAML-based configuration (config.yaml)

Fixed

• Check HTTP status codes in downloadFile (404s were silently saving error pages)
• Change break to continue in downloadFileList (malformed lines no longer abort entire loop)
• Stream files through sha256 hasher instead of loading entirely into memory
• Fix exponential backoff calculation (was starting at 8s instead of 1s)
• Return errors from generateFileList instead of swallowing them
• Skip to next version in downloadHandler when sha256sum.txt download fails
• Replace panic() with logrus.Fatal() for config errors

Changed

• Upgrade Go from 1.22 to 1.24 (fixes crypto/tls and crypto/x509 vulnerabilities)
• Upgrade gopkg.in/yaml from v2 to v3
• Upgrade golang.org/x/sys to v0.28.0
• Use filepath.Join() instead of string concatenation for paths
• Rename module to github.com/BadgerOps/ocpsync
• Bump default config versions to OCP 4.17, 4.18, 4.19
• Rewrite tests to use httptest.NewServer and t.TempDir()
• Add CI/CD pipeline with changelog-driven releases, cross-platform builds, and checksums