Prepare a local repo of patched binaries for the current build

For each registry entry matching the current platform, ensures a patched binary is present in repo_dir (from cache_dir if available, else built and then cached) and writes a PACKAGES index over them.

The repo is assembled at a content-addressed path derived from the resolved patch set. Because every build_binary_package() resolution in a run passes the same patches/platform/arch/R, they all resolve to the same file:// repo URL, so {pkgcache} reuses one _metadata snapshot instead of minting a fresh ~70 MB one per resolution. See https://codefloe.com/rpkgs/bincraft/issues/62.

Usage

prepare_patched_repo(
  patches_dir,
  platform,
  arch,
  r_minor,
  cache_dir = file.path("/mnt", "cache", "patched-binaries"),
  repo_dir = NULL
)

Arguments

patches_dir

Directory with registry.json, or NULL.

platform

Build platform, e.g. "ubuntu-2604".

arch

Build arch, e.g. "amd64".

r_minor

R "major.minor" string, e.g. "4.5".

cache_dir

Persistent cache for patched binaries.

repo_dir

Directory to assemble the local repo in. Defaults to a content-addressed path under cache_dir so identical patch sets reuse a stable repo URL; pass an explicit path to override.

Value

repo_dir if at least one patched binary was produced, else NULL.