mirrorsync is a Go command-line tool for transparent mirroring of APT and Alpine APK repositories. It preserves upstream metadata and signatures, verifies package payloads against upstream checksums, and publishes package files before signed metadata so clients do not observe metadata that references missing packages.

mirrorsync plan   -config config.yaml
mirrorsync sync   -config config.yaml
mirrorsync verify -config config.yaml
mirrorsync prune  -config config.yaml
mirrorsync run    -config config.yaml

See spec.md and config.test.yaml for the supported configuration format.

make build
make test

The project uses Go 1.26.4. The release binary is built statically with CGO_ENABLED=0.

docker run --rm \
  -v "$PWD/config.yaml:/config.yaml:ro" \
  -v "$PWD/mirrors:/srv/mirrors" \
  ghcr.io/torob/mirror-sync:latest \
  sync -config /config.yaml

Published images are available at ghcr.io/torob/mirror-sync.

Releases are created from v* tags. The release workflow builds Linux amd64 and arm64 archives, publishes checksums, and pushes a multi-arch image to GitHub Container Registry.