ci: Add workflows

.github/CODEOWNERS

@@ -0,0 +1,11 @@
+# See https://help.github.com/articles/about-codeowners/ for syntax
+
+# Core Engineering will be the default owners for everything
+# in the repo. Unless a later match takes precedence,
+# @deepset-ai/core-engineering will be requested for review
+# when someone opens a pull request.
+*                       @deepset-ai/open-source-engineering
+
+# Documentation
+*.md                    @deepset-ai/documentation @deepset-ai/open-source-engineering
+releasenotes/notes/*    @deepset-ai/documentation @deepset-ai/open-source-engineering

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'daily'

.github/pull_request_template.md

@@ -0,0 +1,25 @@
+### Related Issues
+
+- fixes #issue-number
+
+### Proposed Changes:
+
+ <!--- In case of a bug: Describe what caused the issue and how you solved it -->
+ <!--- In case of a feature: Describe what did you add and how it works -->
+
+### How did you test it?
+
+<!-- unit tests, integration tests, manual verification, instructions for manual tests -->
+
+### Notes for the reviewer
+
+<!-- E.g. point out section where the reviewer  -->
+
+### Checklist
+
+- I have read the [contributors guidelines](https://github.com/deepset-ai/haystack/blob/main/CONTRIBUTING.md) and the [code of conduct](https://github.com/deepset-ai/haystack/blob/main/code_of_conduct.txt)
+- I have updated the related issue with new insights and changes
+- I added unit tests and updated the docstrings
+- I've used one of the [conventional commit types](https://www.conventionalcommits.org/en/v1.0.0/) for my PR title: `fix:`, `feat:`, `build:`, `chore:`, `ci:`, `docs:`, `style:`, `refactor:`, `perf:`, `test:`.
+- I documented my code
+- I ran [pre-commit hooks](https://github.com/deepset-ai/haystack/blob/main/CONTRIBUTING.md#installation) and fixed any issue

.github/workflows/licensing.yml

@@ -0,0 +1,18 @@
+name: Licensing
+
+on:
+  pull_request:
+    paths:
+      - "haystack_experimental/**/*.py"
+      - "test/**/*.py"
+      - "pyproject.toml"
+
+jobs:
+  license-header:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Check License Header
+        run: docker run --rm -v "$(pwd):/github/workspace" ghcr.io/korandoru/hawkeye check

.github/workflows/project.yml

@@ -0,0 +1,16 @@
+name: Track issues with Github project
+
+on:
+  issues:
+    types:
+      - opened
+
+jobs:
+  add-to-project:
+    name: Add new issues to project for triage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+        with:
+          project-url: https://github.com/orgs/deepset-ai/projects/5
+          github-token: ${{ secrets.GH_PROJECT_PAT }}

.github/workflows/pypi_release.yml

@@ -0,0 +1,40 @@
+name: Project release on PyPi
+
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+*"
+
+env:
+  HATCH_VERSION: "1.9.4"
+
+jobs:
+  release-on-pypi:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Hatch
+        run: pip install hatch==${{ env.HATCH_VERSION }}
+
+      - name: Build Haystack Experimental
+        run: hatch build
+
+      - name: Publish on PyPi
+        env:
+          HATCH_INDEX_USER: __token__
+          HATCH_INDEX_AUTH: ${{ secrets.HAYSTACK_AI_PYPI_TOKEN }}
+        run: hatch publish -y
+
+      - name: Notify Slack
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+          VERSION: ${{ github.ref_name }}
+        if: always()
+        uses: act10ns/slack@v2
+        with:
+          status: ${{ job.status }}
+          channel: "#haystack-notifications"
+          config: .github/config/pypi-release-slack-notification.yml

.github/workflows/tests.yml

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+# If you change this name also do it in tests_skipper.yml and ci_metrics.yml
+name: Tests
+
+on:
+  # Activate this workflow manually
+  workflow_dispatch:
+
+  # Run tests nightly against Haystack's main branch
+  schedule:
+    - cron: "0 0 * * *"
+
+  push:
+    branches:
+      - main
+
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+    paths:
+      # Keep the list in sync with the paths defined in the `tests_skipper.yml` workflow
+      - "haystack_experimental/**/*.py"
+      - "test/**/*.py"
+      - "pyproject.toml"
+
+env:
+  PYTHON_VERSION: "3.8"
+  HATCH_VERSION: "1.9.4"
+
+jobs:
+  linting:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Hatch
+        run: pip install hatch==${{ env.HATCH_VERSION }}
+
+      - name: Check code format
+        run: hatch fmt
+
+      - name: Linting
+        run: hatch run test:lint
+
+      - name: Typing
+        run: hatch run test:typing
+
+  unit-tests:
+    name: Unit / ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "${{ env.PYTHON_VERSION }}"
+
+      - name: Install Hatch
+        run: pip install hatch==${{ env.HATCH_VERSION }}
+
+      - name: Run
+        run: hatch run test:cov
+
+      - name: Coveralls
+        # We upload only coverage for ubuntu as handling both os
+        # complicates the workflow too much for little to no gain
+        if: matrix.os == 'ubuntu-latest'
+        uses: coverallsapp/github-action@v2
+        with:
+          path-to-lcov: coverage.xml
+
+      - name: Nightly - run unit tests with Haystack main branch
+        if: github.event_name == 'schedule'
+        id: nightly-haystack-main
+        run: |
+          hatch run pip install git+https://github.com/deepset-ai/haystack.git
+          hatch run test:unit

.github/workflows/workflows_linting.yml

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+name: Github workflows linter
+
+on:
+  pull_request:
+    paths:
+      - ".github/workflows"
+
+jobs:
+  lint-workflows:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install actionlint
+        run: go install github.com/rhysd/actionlint/cmd/actionlint@latest
+
+      - name: Run actionlint
+        run: actionlint

haystack_experimental/__init__.py

@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <[email protected]>
+#
+# SPDX-License-Identifier: Apache-2.0

haystack_experimental/version.py

@@ -2,9 +2,4 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-from importlib import metadata
-
-try:
-    __version__ = str(metadata.version("haystack-experimental"))
-except metadata.PackageNotFoundError:
-    __version__ = "main"
+__version__ = "0.0.0"