#!/bin/sh
# Install R packages into the CI library with uvr (https://github.com/nbafrank/uvr).
#
# Usage:
#   local/uvr-install.sh httr2 jsonlite
#   local/uvr-install.sh forgejo::codefloe.com/rpkgs/bincraft@v4.4.3
#
# Replaces `pak::pak(...)`. uvr is project-scoped: `uvr add` refuses to run
# outside a project and always writes to `.uvr/library/`, and only
# `uvr sync --library` can target an existing library. The project is therefore
# minted in a scratch directory under TMPDIR and thrown away afterwards; that
# also keeps `uvr init`'s `.Rprofile` out of the repo checkout, where it would
# hijack `.libPaths()` for every other R call in the pipeline.
#
# Pruning is a no-op here: uvr disables it whenever `--library` is passed,
# precisely because such a target may be shared (`/mnt/cache/R-pkgs` holds
# bincraft and its dependencies alongside whatever this script installs).
#
# System dependencies come from uvr's vendored r-system-requirements rules, so
# `pak::sysreqs_db_update()` and `PKG_SYSREQS_PLATFORM` are no longer needed.
#
# Environment:
#   UVR_R_BIN        R interpreter to install for; set by install-bincraft.R so
#                    the per-R-minor passes target their own R, not the primary
#   R_VERSION        fallback interpreter selector (/opt/R/<version>/bin/R)
#   UVR_TARGET_LIB   target library; defaults to R_LIBS_USER, then to the
#                    active R's .libPaths()[1] (which is where pak wrote)
#   UVR_INSTALL_DIR  where the uvr binary lands (default /usr/local/bin)

set -eu

# renovate: datasource=github-releases depName=nbafrank/uvr
UVR_PIN="v0.4.4"

if [ "$#" -eq 0 ]; then
  echo "usage: $0 <pkg-spec>..." >&2
  exit 2
fi

# The build images keep R under /opt/R/<version> and off PATH. uvr resolves the
# interpreter via PATH and never downloads one unless `uvr r install` is run, so
# put the requested R first.
r_bin="${UVR_R_BIN:-}"
if [ -z "$r_bin" ] && [ -n "${R_VERSION:-}" ] && [ -x "/opt/R/${R_VERSION}/bin/R" ]; then
  r_bin="/opt/R/${R_VERSION}/bin/R"
fi
if [ -n "$r_bin" ]; then
  PATH="$(dirname "$r_bin"):$PATH"
  export PATH
else
  r_bin="$(command -v R)"
fi

target_lib="${UVR_TARGET_LIB:-${R_LIBS_USER:-}}"
if [ -z "$target_lib" ]; then
  target_lib="$("$r_bin" --no-echo --no-save -e 'cat(.libPaths()[1])')"
fi
if [ -z "$target_lib" ]; then
  echo "error: could not determine a target library; set UVR_TARGET_LIB" >&2
  exit 2
fi
mkdir -p "$target_lib"

# Pin the manifest to the active R so the lockfile's R stays in step with the
# library's R sentinel. Without that, uvr can decide the library is ABI-stale
# and wipe it -- and this target is shared with bincraft. uvr only discovers R
# via PATH/R_HOME (it does not scan /opt/R), so the R put on PATH above is the
# only candidate this constraint can resolve to.
# shellcheck disable=SC2016  # $major/$minor are R expressions, not shell vars
r_full="$("$r_bin" --no-echo --no-save -e 'cat(paste(R.version$major, R.version$minor, sep = "."))')"

install_dir="${UVR_INSTALL_DIR:-/usr/local/bin}"
uvr_bin="${install_dir}/uvr"
if [ ! -x "$uvr_bin" ]; then
  echo "Bootstrapping uvr ${UVR_PIN} into ${install_dir}"
  UVR_INSTALL_DIR="$install_dir" UVR_VERSION="$UVR_PIN" \
    sh -c 'curl -fsSL https://raw.githubusercontent.com/nbafrank/uvr/main/install.sh | sh'
fi

project_dir="${TMPDIR:-/tmp}/uvr-ci-$$"
rm -rf "$project_dir"
mkdir -p "$project_dir"
trap 'rm -rf "$project_dir"' EXIT
cd "$project_dir"

"$uvr_bin" init --here --r-version "$r_full"
# --no-install: resolve and lock only. The install happens in the sync below,
# which is the only command that honours --library.
"$uvr_bin" add --no-install "$@"
"$uvr_bin" sync --library "$target_lib" --install-system-deps