From 50c79336d0de87e0f77137530142625e1473c8f1 Mon Sep 17 00:00:00 2001
From: Yuta Saito <kateinoigakukun@gmail.com>
Date: Tue, 20 Feb 2024 13:14:24 +0000
Subject: [PATCH] [ruby] Build with base ruby 3.0 to bootstrap from git sources

We recently updated the minimum required base ruby version to 3.0
(https://github.com/ruby/ruby/pull/9976). This change updates the
Dockerfile to build base ruby from tarball and install it instead of
using Ubuntu focal's ruby package, which is still 2.7.
---
 projects/ruby/Dockerfile        |  6 ++++--
 projects/ruby/build_baseruby.sh | 38 +++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 2 deletions(-)
 create mode 100755 projects/ruby/build_baseruby.sh

diff --git a/projects/ruby/Dockerfile b/projects/ruby/Dockerfile
index 899814767509..3f442c99738a 100644
--- a/projects/ruby/Dockerfile
+++ b/projects/ruby/Dockerfile
@@ -19,11 +19,13 @@ FROM gcr.io/oss-fuzz-base/base-builder
 RUN apt-get update -y && \
     apt-get install -y libssl-dev libyaml-dev libreadline6-dev \
                        zlib1g-dev libncurses5-dev libffi-dev \
-                       bison autoconf ruby pkg-config
+                       bison autoconf pkg-config
+RUN mkdir $SRC/fuzz
+COPY build_baseruby.sh $SRC/fuzz/
+RUN $SRC/fuzz/build_baseruby.sh
 
 RUN git clone https://github.com/ruby/ruby.git
 WORKDIR ruby
 
 COPY build.sh $SRC/
-RUN mkdir $SRC/fuzz
 COPY *.rb *.c *.options $SRC/fuzz/
diff --git a/projects/ruby/build_baseruby.sh b/projects/ruby/build_baseruby.sh
new file mode 100755
index 000000000000..a9ddf6908c65
--- /dev/null
+++ b/projects/ruby/build_baseruby.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+# This script builds and installs the base ruby, which is used to bootstrap ruby from git sources.
+
+set -euxo pipefail
+
+# NOTE: You can find tarball URLs and SHA256 checksums at https://www.ruby-lang.org/en/downloads
+ruby_tarball_url=https://cache.ruby-lang.org/pub/ruby/3.0/ruby-3.0.6.tar.gz
+ruby_tarball_sha256=6e6cbd490030d7910c0ff20edefab4294dfcd1046f0f8f47f78b597987ac683e
+
+# Download and verify the tarball
+build_dir="$(mktemp -d -t build_baseruby.XXXXXX)"
+curl -L -o "$build_dir/ruby.tar.gz" "$ruby_tarball_url"
+echo "$ruby_tarball_sha256  $build_dir/ruby.tar.gz" | sha256sum -c -
+
+# Extract the tarball
+tar -C "$build_dir" -xzf "$build_dir/ruby.tar.gz" --strip-components=1
+
+# Build and install the base ruby
+cd "$build_dir"
+./configure --disable-install-doc
+make -j"$(nproc)"
+make install