Add reusable public gh actions.

.github/actions/create-and-tag-release/action.yml

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+name: "Create a release tag and github release"
+description: "Create a release tag and github release"
+
+inputs:
+  tag:
+    description: 'Release tag (e.g. release/2.0.1)'
+    required: true
+
+  name:
+    description: 'Release name, leave empty to use tag'
+    required: false
+
+  removeExistingReleaseAndTag:
+    description: 'Remove existing release and tag'
+    type: boolean
+    required: false
+    default: false
+
+  artifacts:
+    description: 'A glob or paths to artifacts to include in the release (e.g., releases/*)'
+    required: true
+
+  token:
+    description: "Github token."
+    required: false
+
+runs:
+ using: "composite"
+ steps:
+    - name: Remove existing release and tag
+      if: ${{ inputs.removeExistingReleaseAndTag }}
+      shell: bash
+      run: |
+        if gh release delete "${{ inputs.tag }}" --yes --cleanup-tag; then
+          echo "Release deleted: ${{ inputs.tag }}"
+          # Wait a bit so that the deletion is confirmed and propagates.
+          sleep 5
+        else
+          echo "::warning::Can't delete an existing release with this tag: ${{ inputs.tag }}?"
+          gh release list
+        fi
+      env:
+        GH_TOKEN: ${{ inputs.token || github.token }}
+
+    - name: Create release
+      uses: ncipollo/release-action@2c591bcc8ecdcd2db72b97d6147f871fcd833ba5
+      with:
+        draft: false
+        commit: ${{ github.ref }}
+        tag: ${{ inputs.tag }}
+        name: ${{ inputs.name }}
+        artifacts: ${{ inputs.artifacts }}
+        allowUpdates: false
+        artifactErrorsFailBuild: true
+        generateReleaseNotes: true
+        token: ${{ inputs.token || github.token }}

.github/actions/download-release-artifacts/action.yml

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+name: Download release artifacts
+description: Download one or more artifacts (reusable infra action)
+
+inputs:
+  release:
+    description: "Release to download. Default 'latest'. If not 'latest', this has to be in the form tags/<tag_name> or <release_id>"
+    required: true
+
+  dir:
+    description: "Target directory to write artifacts to."
+    required: true
+
+  repo:
+    description: "The `org/repo` containing the release. Defaults to the current repo."
+    required: false
+
+  pattern:
+    description: "Regexp pattern to match artifact names."
+    default: "^.*$"
+    required: false
+
+  token:
+    description: "Github token."
+    required: false
+
+runs:
+  using: "composite"
+  steps:
+      - name: Create release artifact folders
+        shell: bash
+        run: |
+          mkdir -p ${{ inputs.dir }}
+
+      - name: Fetch release artifacts
+        uses: dweiss/fetch-gh-release-asset@v1
+        with:
+          repo: ${{ inputs.repo }}
+          version: ${{ inputs.release }}
+          file: ${{ inputs.pattern }}
+          regex: true
+          target: ${{ inputs.dir }}
+          token: ${{ inputs.token || github.token }}
+
+      - name: List downloaded release files 
+        shell: bash
+        run: |
+          ls -al ${{ inputs.dir }}

.github/actions/prepare-git-clone/action.yml

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+name: "Prepare local git clone"
+description: "Prepare local git clone"
+
+inputs:
+  token:
+    description: "Github token."
+    required: false
+
+runs:
+ using: "composite"
+ steps:
+    - name: Correct git autocrlf
+      shell: bash
+      run: git config --global core.autocrlf false
+
+    - name: Git checkout
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 1
+        submodules: recursive
+        token: ${{ inputs.token || github.token }}

.github/actions/prepare-gradle-build/action.yml

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+name: "Prepare Gradle and Java build"
+description: "Prepare Gradle and Java build"
+
+inputs:
+   jdk-version:
+     required: true
+     description: "JDK version to set up"
+
+   jdk-distribution:
+     required: false
+     default: "temurin"
+     description: "JDK distribution"
+
+runs:
+ using: "composite"
+ steps:
+   - name: "Set up JDK (${{ inputs.jdk-distribution }}, ${{ inputs.jdk-version }}) [buildjet]"
+     if: ${{ contains(runner.name, 'buildjet') }}
+     uses: buildjet/setup-java@v4
+     with:
+       distribution: ${{ inputs.jdk-distribution }}
+       java-version: ${{ inputs.jdk-version }}
+       java-package: jdk
+
+   - name: "Set up JDK (${{ inputs.jdk-distribution }}, ${{ inputs.jdk-version }}) [blacksmith]"
+     if: ${{ contains(runner.name, 'blacksmith') }}
+     uses: useblacksmith/setup-java@v5
+     with:
+       distribution: ${{ inputs.jdk-distribution }}
+       java-version: ${{ inputs.jdk-version }}
+       java-package: jdk
+
+   - name: "Set up JDK (${{ inputs.jdk-distribution }}, ${{ inputs.jdk-version }}) [github]"
+     if: ${{ !contains(runner.name, 'buildjet') && !contains(runner.name, 'blacksmith') }}
+     uses: actions/setup-java@v4
+     with:
+       distribution: ${{ inputs.jdk-distribution }}
+       java-version: ${{ inputs.jdk-version }}
+       java-package: jdk
+
+   - name: Setup Gradle [blacksmith]
+     if: ${{ contains(runner.name, 'blacksmith') }}
+     uses: useblacksmith/setup-gradle/setup-gradle@v5
+
+   - name: Setup Gradle
+     if: ${{ !contains(runner.name, 'buildjet') && !contains(runner.name, 'blacksmith') }}
+     uses: gradle/actions/setup-gradle@v3

.github/actions/prepare-java-build/action.yml

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+name: "Prepare Java build"
+description: "Prepare Java build"
+
+inputs:
+   jdk-version:
+     required: true
+     description: "JDK version to set up"
+
+   jdk-distribution:
+     required: false
+     default: "temurin"
+     description: "JDK distribution"
+
+runs:
+ using: "composite"
+ steps:
+   - name: "Set up JDK (${{ inputs.jdk-distribution }}, ${{ inputs.jdk-version }}) [buildjet]"
+     if: ${{ contains(runner.name, 'buildjet') }}
+     uses: buildjet/setup-java@v4
+     with:
+       distribution: ${{ inputs.jdk-distribution }}
+       java-version: ${{ inputs.jdk-version }}
+       java-package: jdk
+
+   - name: "Set up JDK (${{ inputs.jdk-distribution }}, ${{ inputs.jdk-version }}) [blacksmith]"
+     if: ${{ contains(runner.name, 'blacksmith') }}
+     uses: useblacksmith/setup-java@v5
+     with:
+       distribution: ${{ inputs.jdk-distribution }}
+       java-version: ${{ inputs.jdk-version }}
+       java-package: jdk
+
+   - name: "Set up JDK (${{ inputs.jdk-distribution }}, ${{ inputs.jdk-version }}) [github]"
+     if: ${{ !contains(runner.name, 'buildjet') && !contains(runner.name, 'blacksmith') }}
+     uses: actions/setup-java@v4
+     with:
+       distribution: ${{ inputs.jdk-distribution }}
+       java-version: ${{ inputs.jdk-version }}
+       java-package: jdk

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"