Bring your own Ruby

bin/compile

@@ -0,0 +1 @@
+./run

bin/detect

@@ -0,0 +1 @@
+./run

bin/finalize

@@ -0,0 +1 @@
+./run

bin/release

@@ -0,0 +1 @@
+./run

bin/ruby-run

@@ -0,0 +1,50 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Cloud Foundry Java Buildpack
+# Copyright 2013-2020 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+$stdout.sync = true
+$stderr.sync = true
+$LOAD_PATH.unshift File.expand_path('../lib', __dir__)
+require 'java_buildpack/buildpack'
+
+case ARGV[0]
+  when "compile"
+    app_dir = ARGV[1]
+    JavaBuildpack::Buildpack.with_buildpack(app_dir, nil, nil, 'Compile failed with exception %s', &:compile)
+
+  when "detect"
+    app_dir = ARGV[1]
+    components = JavaBuildpack::Buildpack.with_buildpack(app_dir, nil, nil, 'Detect failed with exception %s',
+                                                         &:detect).compact
+    if components.empty?
+      abort
+    else
+      str = components.join(' ')
+      puts str.length > 255 ? str.slice(0..251) + '...' : str
+    end
+
+  when "finalize"
+    app_dir  = ARGV[1]
+    deps_dir = ARGV[3]
+    index    = ARGV[4]
+    JavaBuildpack::Buildpack.with_buildpack(app_dir, deps_dir, index, 'Finalize failed with exception %s', &:compile)
+
+  when "release"
+    app_dir  = ARGV[1]
+    output = JavaBuildpack::Buildpack.with_buildpack(app_dir, nil, nil, 'Release failed with exception %s', &:release)
+    puts output
+end

bin/run

@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+
+set -e
+set -u
+set -o pipefail
+
+BUILDPACK_DIR="$(cd "$(dirname "${0}")/.." && pwd)"
+readonly BUILDPACK_DIR
+
+RUBY_DIR="/tmp/ruby"
+readonly RUBY_DIR
+
+function util::config::lookup() {
+  sed '/^#/d' < "${BUILDPACK_DIR}/config/ruby.yml"
+}
+
+function util::cache::present() {
+  if [[ -e "${BUILDPACK_DIR}/resources/cache" ]]; then
+    return 0
+  else
+    return 1
+  fi
+}
+
+function util::index::lookup() {
+  local repository_root
+  repository_root="$(grep "repository_root" <<< "$(util::config::lookup)" | cut -d' ' -f2)"
+
+  local uri
+  uri="${repository_root}/index.yml"
+
+  if util::cache::present; then
+    local sha
+    sha="$(printf "%s" "${uri}" | shasum -a 256 | cut -d' ' -f1)"
+    cat "${BUILDPACK_DIR}/resources/cache/${sha}.cached"
+  else
+    curl -ssL "${uri}"
+  fi
+}
+
+function util::semver::parse() {
+  local version major minor patch
+  version="$(grep "version" <<< "$(util::config::lookup)" | cut -d' ' -f2)"
+  major="$(cut -d'.' -f1 <<< "${version}")"
+  minor="$(cut -d'.' -f2 <<< "${version}")"
+  patch="$(cut -d'.' -f3 <<< "${version}")"
+
+  printf "%s" "${major/+/*}\\.${minor/+/*}\\.${patch/+/*}"
+}
+
+function util::ruby::stream() {
+  local uri
+  uri="${1}"
+
+  if util::cache::present; then
+    local sha
+    sha="$(printf "%s" "${uri}" | shasum -a 256 | cut -d' ' -f1)"
+    cat "${BUILDPACK_DIR}/resources/cache/${sha}.cached"
+  else
+    curl -ssL "${uri}"
+  fi
+}
+
+function util::install() {
+  local index semver
+  index="$(util::index::lookup)"
+  semver="$(util::semver::parse)"
+
+  local uri
+  uri="$(grep "${semver}" <<< "${index}" | head -n 1 | awk '{print $2}')"
+
+  util::ruby::stream "${uri}" | tar xz -C "${RUBY_DIR}"
+}
+
+function util::print::error() {
+  local message red reset
+  message="${1}"
+  red="\033[0;31m"
+  reset="\033[0;39m"
+
+  echo -e "${red}${message}${reset}" >&2
+  exit 1
+}
+
+function util::environment::setup() {
+  export PATH="${RUBY_DIR}/bin:${PATH:-}"
+  export LIBRARY_PATH="${RUBY_DIR}/lib:${LIBRARY_PATH:-}"
+  export LD_LIBRARY_PATH="${RUBY_DIR}/lib:${LIBRARY_PATH:-}"
+  export CPATH="${RUBY_DIR}/include:${CPATH:-}"
+}
+
+function main() {
+  local phase
+  phase="$(basename "${0}")"
+
+  if [[ "${CF_STACK}" == "cflinuxfs4" ]]; then
+    if [[ ! -e "${RUBY_DIR}" ]]; then
+      mkdir -p "${RUBY_DIR}"
+
+      util::install
+    fi
+
+    util::environment::setup
+  fi
+
+  exec "${BUILDPACK_DIR}/bin/ruby-run" "${phase}" "${@-}"
+}
+
+main "${@:-}"

config/ruby.yml

@@ -0,0 +1,19 @@
+# Cloud Foundry Java Buildpack
+# Copyright 2013-2020 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Configuration for Ruby
+---
+version: 3.1.+
+repository_root: https://raw.githubusercontent.com/cloudfoundry/ruby-buildpack/develop/java-index

rakelib/dependency_cache_task.rb

@@ -119,7 +119,7 @@ def component_ids
         offline_cache = offline_cache.split(',')
         (conf << offline_cache).flatten!.uniq!
       end
-      conf
+      conf << "ruby"
     end
 
     def component_configuration(component_id)