#!/usr/bin/env bash # Usage: cached-bundle install –deployment # # After running `bundle`, caches the `vendor/bundle` directory to S3. # On the next run, restores the cached directory before running `bundle`. # When `Gemfile.lock` changes, the cache gets rebuilt. # # Requirements: # - Gemfile.lock # - TRAVIS_REPO_SLUG # - TRAVIS_RUBY_VERSION # - AMAZON_S3_BUCKET # - script/s3-put # - bundle # - curl # # Author: Mislav Marohnić
set -e
compute_md5() {
local output="$(openssl md5)" echo "${output##* }"
}
download() {
curl --tcp-nodelay -qsfL "$1" -o "$2"
}
gemfile=“${BUNDLE_GEMFILE:-Gemfile}” bundle_fullpath=“$(dirname $gemfile)/vendor/bundle” bundle_path=${bundle_fullpath#$PWD/} gemfile_hash=“$(compute_md5 <”${gemfile}.lock“)” cache_name=“${TRAVIS_RUBY_VERSION}-${gemfile_hash}.tgz” fetch_url=“${AMAZON_S3_BUCKET}.s3.amazonaws.com/${TRAVIS_REPO_SLUG}/${cache_name}”
if download “$fetch_url” “$cache_name”; then
echo "Reusing cached bundle ${cache_name}" tar xzf "$cache_name"
fi
bundle “$@”
if [ ! -f “$cache_name” ] && [ -n “$AMAZON_SECRET_ACCESS_KEY” ]; then
echo "Caching \`${bundle_path}' to S3" tar czf "$cache_name" "$bundle_path" script/s3-put "$cache_name" "${AMAZON_S3_BUCKET}:${TRAVIS_REPO_SLUG}/${cache_name}"
fi