webr-build.sh

#!/bin/bash
set -eu

[[ -z "${1-}" ]] && echo "Error: Must supply tarball" && exit 1
[[ ! -f "$1" ]] && echo "Error: Must supply a tarball file" && exit 1

PKG_NAME=$(basename $1)
[[ $PKG_NAME =~ ([^_]+)_ ]]
PKG_NAME="${BASH_REMATCH[1]-NULL}"

[[ "$PKG_NAME" == "NULL" ]] && echo "Error: File does not conform to a versioned tarball" && exit 1

ROOT=$(dirname $(realpath "$0"))
ORIG=$(realpath .)
TMP=$(mktemp -d)
TARBALL=$(realpath "$1")

export R_MAKEVARS_USER="${ROOT}/webr-vars.mk"

cd $TMP
tar xvf $TARBALL

R_CMD_OPTS="--no-docs --no-html --no-test-load --no-staged-install --no-byte-compile"
MKVARS_SRC="${ORIG}/Makevars/${PKG_NAME}.mk"
MKVARS_DEST="./${PKG_NAME}/src/Makevars"
MKVARS_WEBR="./${PKG_NAME}/src/Makevars.webr"
# If a Makevars override is provided, use it and skip running `configure`
for mk in "${MKVARS_SRC}" "${MKVARS_WEBR}"; do
  if [ -f "$mk" ]; then
    echo "Using Makevars override: $mk"
    cp "$mk" "${MKVARS_DEST}"
    R_CMD_OPTS="${R_CMD_OPTS} --no-configure"
    break
  fi
done

# Need to use an empty library and only then copy to the `lib` folder,
# otherwise R might try to load wasm packages from the library and fail
mkdir lib

$R_HOST/bin/R CMD INSTALL --build --library="lib" "${PKG_NAME}" ${R_CMD_OPTS}

if [ -d "${ROOT}/lib/${PKG_NAME}" ]; then
  rm -rf "${ROOT}/lib/${PKG_NAME}"
fi
mv lib/* ${ROOT}/lib

BIN="${ORIG}/repo/bin/emscripten/contrib/${R_VERSION}/"

mkdir -p $BIN
find . -name '*.tgz' -exec mv {} $BIN \;
find . -name '*.tar.gz' -exec sh -c \
  'f="{}"; v="${f#*_}"; mv -- "$f" "'${BIN}'${f%%_*}_${v%%_*}.tgz"' \;

cd ${ORIG}
rm -rf ${TMP}