Require Ruby 3.1

.github/workflows/tests.yml

@@ -294,12 +294,6 @@ jobs:
           - name: tests (macOS 13)
             test-flags: --coverage
             runs-on: macos-13
-          - name: tests (Ubuntu 22.04; Ruby 2.6)
-            runs-on: ubuntu-22.04
-            ruby: '2.6'
-          - name: tests (macOS 13; Ruby 2.6)
-            runs-on: macos-13
-            ruby: '2.6'
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew
@@ -313,21 +307,8 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ${{ steps.set-up-homebrew.outputs.gems-path }}
-          key: ${{ matrix.runs-on }}-tests-rubygems${{ matrix.ruby }}-${{ steps.set-up-homebrew.outputs.gems-hash }}
-          restore-keys: ${{ matrix.runs-on }}-tests-rubygems${{ matrix.ruby }}-
-
-      - name: Setup Ruby
-        if: matrix.ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ${{ matrix.ruby }}
-          bundler: none
-
-      - name: Setup Ruby environment
-        if: matrix.ruby
-        run: |
-          echo "HOMEBREW_USE_RUBY_FROM_PATH=1" >> "${GITHUB_ENV}"
-          rm -rf "${{ steps.set-up-homebrew.outputs.repository-path }}/Library/Homebrew/vendor/portable-ruby"
+          key: ${{ matrix.runs-on }}-tests-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}
+          restore-keys: ${{ matrix.runs-on }}-tests-rubygems-
 
       - run: brew config
 
@@ -341,8 +322,8 @@ jobs:
         uses: actions/cache@v3
         with:
           path: tests
-          key: ${{ runner.os }}-${{ matrix.test-flags }}-parallel_runtime_rspec${{ matrix.ruby }}-${{ github.sha }}
-          restore-keys: ${{ runner.os }}-${{ matrix.test-flags }}-parallel_runtime_rspec${{ matrix.ruby }}-
+          key: ${{ runner.os }}-${{ matrix.test-flags }}-parallel_runtime_rspec-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-${{ matrix.test-flags }}-parallel_runtime_rspec-
 
       - name: Install brew tests dependencies
         if: matrix.name != 'tests (generic OS)'

Library/Homebrew/brew.sh

@@ -504,9 +504,6 @@ case "$*" in
     ;;
 esac
 
-# TODO: remove this after we want Dependabot to point to 3.1 minimum and system macOS Ruby code is gone
-export HOMEBREW_RUBY3="1"
-
 # TODO: bump version when new macOS is released or announced and update references in:
 # - docs/Installation.md
 # - https://github.com/Homebrew/install/blob/HEAD/install.sh

Library/Homebrew/utils/ruby.sh

@@ -1,6 +1,9 @@
 # When bumping, run `brew vendor-gems --update=--ruby`
 # When bumping to a new major/minor version, also update the bounds in the Gemfile
-export HOMEBREW_REQUIRED_RUBY_VERSION=2.6.10
+export HOMEBREW_REQUIRED_RUBY_VERSION=3.1
+
+# TODO: remove this after we want Dependabot to point to 3.1 minimum
+export HOMEBREW_RUBY3="1"
 
 # HOMEBREW_LIBRARY is from the user environment
 # shellcheck disable=SC2154
@@ -10,24 +13,9 @@ test_ruby() {
     return 1
   fi
 
-  supported_ruby_versions=()
-  if [[ -n "${HOMEBREW_RUBY3}" && -z "${HOMEBREW_USE_RUBY_FROM_PATH}" ]]
-  then
-    supported_ruby_versions+=("3.1.0")
-  fi
-  supported_ruby_versions+=("${HOMEBREW_REQUIRED_RUBY_VERSION}")
-
-  for ruby_version in "${supported_ruby_versions[@]}"
-  do
-    if "$1" --enable-frozen-string-literal --disable=gems,did_you_mean,rubyopt \
-       "${HOMEBREW_LIBRARY}/Homebrew/utils/ruby_check_version_script.rb" \
-       "${ruby_version}" 2>/dev/null
-    then
-      return 0
-    fi
-  done
-
-  return 1
+  "$1" --enable-frozen-string-literal --disable=gems,did_you_mean,rubyopt \
+    "${HOMEBREW_LIBRARY}/Homebrew/utils/ruby_check_version_script.rb" \
+    "${HOMEBREW_REQUIRED_RUBY_VERSION}" 2>/dev/null
 }
 
 can_use_ruby_from_path() {