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rbenv: install all gems from one version to another
#!/bin/bash
# copy is a misnomer; it's actually LIST + INSTALL
# --from 2.2.1 [--to other-version-else-whatever-is-currently-set]
#
# TODO: install only most-recent version that's installed in FROM
# TODO: use gem names only from FROM, install latest available version (might be more recent than in FROM)
# TODO: pass arguments to gem command (e.g. --no-document)
CURRENT_VERSION=`rbenv version | cut -d' ' -f1`
GEM_LIST_ARGS="--local"
while [[ $# -gt 0 ]]; do
option="$1"
case $option in
--from)
FROM="$2"
shift
;;
--to)
TO="$2"
shift
;;
esac
shift # past argument or value
done
if [ -z "${FROM}" ]; then
FROM="${CURRENT_VERSION}"
fi
if [ -z "${TO}" ]; then
TO="${CURRENT_VERSION}"
fi
echo ">>> Install gems from v${FROM} to v${TO}"
# Get gems and versions, reformat to GEMNAME:version[,version[...]]
gems=(`RBENV_VERSION=${FROM} gem list ${GEM_LIST_ARGS} | sed -e 's/[\(\)]//g' -e 's/, /,/g' -e 's/ /:/'`)
for geminfo in "${gems[@]}"; do
gem=`echo $geminfo | cut -d: -f1`
versions=(`echo $geminfo | sed -e 's/^.*://' -e 's/,/ /g'`)
for version in "${versions[@]}"; do
installed=`RBENV_VERSION=${TO} gem query -i $gem -v $version`
if [ "${installed}" == "false" ]; then
echo ">>> Installing ${gem} ${version}:"
RBENV_VERSION=${TO} gem install $gem -v $version
else
echo ">>> ${gem} ${version} already installed"
fi
echo ""
done
done
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