👷 Split heads to separate workflow

.github/workflows/current.yml

@@ -1,4 +1,4 @@
-name: Ruby Matrix
+name: Ruby Current Matrix
 
 env:
   K_SOUP_COV_DO: false
@@ -30,8 +30,6 @@ jobs:
     if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
-      CI_CODECOV: true
-      COVER_ALL: true
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -45,11 +43,8 @@ jobs:
           #- '3.1' - 3.1 tests are run by coverage.yml
           - '3.2'
           - '3.3'
-          - head
           - jruby
-          - jruby-head
           - truffleruby
-          - truffleruby-head
 
     steps:
       - name: Checkout

.github/workflows/heads.yml

@@ -0,0 +1,60 @@
+name: Ruby Heads Matrix
+
+env:
+  K_SOUP_COV_DO: false
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '!*' # Do not execute on tags
+  pull_request:
+    branches:
+      - '*'
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Specs - Ruby ${{ matrix.ruby }} ${{ matrix.name_extra || '' }}
+    if: "!contains(github.event.commits[0].message, '[ci skip]') && !contains(github.event.commits[0].message, '[skip ci]')"
+    env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
+      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rubygems:
+          - latest
+        bundler:
+          - latest
+        gemfile:
+          - vanilla
+        ruby:
+          - head
+          - jruby-head
+          - truffleruby-head
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby & Bundle
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "${{ matrix.ruby }}"
+          rubygems: "${{ matrix.rubygems }}"
+          bundler: "${{ matrix.bundler }}"
+          bundler-cache: true
+
+      - name: Run tests
+        run: bundle exec rake