Update default bundler and ruby versions

Rails 8.0.1 needs Ruby 3.2+ and unfortunately they decided to stop shipping with a Ruby version in the Gemfile. I don't yet have `.ruby-version` support, but this will at least allow a `rails new` app to work on Heroku with the default versions.
heroku · Dec 16, 2024 · 64dd3e1 · 64dd3e1
1 parent 96715dc
commit 64dd3e1
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diff --git a/buildpacks/ruby/CHANGELOG.md b/buildpacks/ruby/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Default Ruby version is now 3.2.6 ([]())
+- Default Bundler version is now 2.5.6 ([]())
+
 ## [4.0.2] - 2024-12-16
 
 ### Fixed

diff --git a/buildpacks/ruby/src/main.rs b/buildpacks/ruby/src/main.rs
@@ -122,8 +122,8 @@ impl Buildpack for RubyBuildpack {
         let lockfile_contents = fs_err::read_to_string(&lockfile)
             .map_err(|error| RubyBuildpackError::MissingGemfileLock(lockfile, error))?;
         let gemfile_lock = GemfileLock::from_str(&lockfile_contents).expect("Infallible");
-        let bundler_version = gemfile_lock.resolve_bundler("2.4.5");
-        let ruby_version = gemfile_lock.resolve_ruby("3.1.3");
+        let bundler_version = gemfile_lock.resolve_bundler("2.5.6");
+        let ruby_version = gemfile_lock.resolve_ruby("3.2.6");
 
         // ## Install metrics agent
         build_output = {