Add Antora docs-build

.github/workflows/deploy-docs.yml

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+name: Deploy Docs
+run-name: ${{ format('{0} ({1})', github.workflow, github.event.inputs.build-refname || 'all') }}
+on:
+  workflow_dispatch:
+    inputs:
+      build-refname:
+        description: Enter git refname to build (e.g., 5.7.x).
+        required: false
+  push:
+    branches: docs-build
+env:
+  GRADLE_ENTERPRISE_SECRET_ACCESS_KEY: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
+permissions: read-all
+jobs:
+  build:
+    if: github.repository_owner == 'spring-projects'
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 5
+    - name: Set Up Gradle
+      uses: spring-io/spring-gradle-build-action@v2
+      with:
+        java-version: '17'
+        distribution: temurin
+    - name: Set up refname build
+      if: github.event.inputs.build-refname
+      run: |
+        git fetch --depth 1 https://github.com/$GITHUB_REPOSITORY ${{ github.event.inputs.build-refname }}
+        echo BUILD_REFNAME=${{ github.event.inputs.build-refname }} >> $GITHUB_ENV
+        echo BUILD_VERSION=$(git cat-file --textconv FETCH_HEAD:gradle.properties | sed -n '/^version=/ { s/^version=//;p }') >> $GITHUB_ENV
+    - name: Run Antora
+      run: ./gradlew antora
+    - name: Copy the cache to be included in the site
+      run: cp -rf build/antora/inject-collector-cache-config-extension/.cache build/site/
+    - name: Publish Docs
+      uses: spring-io/spring-doc-actions/rsync-antora-reference@v0.0.11
+      with:
+        docs-username: ${{ secrets.DOCS_USERNAME }}
+        docs-host: ${{ secrets.DOCS_HOST }}
+        docs-ssh-key: ${{ secrets.DOCS_SSH_KEY }}
+        docs-ssh-host-key: ${{ secrets.DOCS_SSH_HOST_KEY }}
+    - name: Bust Clouflare Cache
+      uses: spring-io/spring-doc-actions/bust-cloudflare-antora-cache@v0.0.11
+      with:
+        context-root: spring-shell
+        cloudflare-zone-id: ${{ secrets.CLOUDFLARE_ZONE_ID }}
+        cloudflare-cache-token: ${{ secrets.CLOUDFLARE_CACHE_TOKEN }}

.gitignore

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+/.gradle/
+/.idea/*
+/.settings/
+/.classpath
+/.project
+/build/
+/node_modules/
+/package-lock.json
+/*.iml
+/*.ipr
+/*.iws
+!/.idea/checkstyle-idea.xml
+!/.idea/externalDependencies.xml

README.adoc

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+= Spring Shell Docs Build
+
+You're currently viewing the Antora playbook branch.
+The playbook branch hosts the docs build that is used to build and publish the production docs site.
+
+The Spring Shell reference docs are built using https://antora.org[Antora].
+This README covers how to build the docs in a software branch as well as how to build the production docs site locally.
+
+== Building the Site
+
+You can build the entire site by invoking the following and then viewing the site at `build/site/index.html`
+
+[source,bash]
+----
+./gradlew antora
+----
+
+== Building a Specific Branch
+
+You can build a specific branch and then viewing the branch specific site at `build/site/index.html`.
+
+[source,bash]
+----
+./gradlew antora
+----

antora-playbook.yml

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+antora:
+  extensions:
+  - '@springio/antora-extensions/partial-build-extension'
+  - require: '@springio/antora-extensions/latest-version-extension'
+  - require: '@springio/antora-extensions/inject-collector-cache-config-extension'
+  - '@antora/collector-extension'
+  - '@antora/atlas-extension'
+  - require: '@springio/antora-extensions/root-component-extension'
+    root_component_name: 'shell'
+site:
+  title: Spring Shell
+  url: https://docs.spring.io/spring-shell/reference
+  robots: allow
+git:
+  ensure_git_suffix: false
+content:
+  sources:
+  - url: https://github.com/spring-projects/spring-shell
+    # Refname matching:
+    # https://docs.antora.org/antora/latest/playbook/content-refname-matching/
+    branches: [ main,'({3..9}).+({0..9}).x', '!(3.{0..1}.x)' ]
+    tags: [ 'v({3..9}).+({0..9}).+({0..9})?(-{RC,M}+({0..9}))', '!(v3.{0..1}.+({0..9})?(-{RC,M}+({0..9})))' ]
+    start_path: spring-shell-docs
+asciidoc:
+  attributes:
+    page-stackoverflow-url: https://stackoverflow.com/tags/spring-shell
+    page-pagination: ''
+    hide-uri-scheme: '@'
+    tabs-sync-option: '@'
+  extensions:
+  - '@asciidoctor/tabs'
+  - '@springio/asciidoctor-extensions'
+urls:
+  latest_version_segment_strategy: redirect:to
+  latest_version_segment: ''
+  redirect_facility: httpd
+ui:
+  bundle:
+    url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.3.3/ui-bundle.zip
+runtime:
+  log:
+    failure_level: warn

build.gradle

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+plugins {
+	id 'base'
+	id 'org.antora' version '1.0.0'
+}
+
+antora {
+	version = '3.2.0-alpha.2'
+	options = [clean: true, fetch: true, stacktrace: true]
+	environment = [
+		'ALGOLIA_API_KEY': '9d489079e5ec46dbb238909fee5c9c29',
+		'ALGOLIA_APP_ID': 'WB1FQYI187',
+		'ALGOLIA_INDEX_NAME': 'springshell',
+	]
+	dependencies = [
+		'@antora/atlas-extension': '1.0.0-alpha.1',
+		'@antora/collector-extension': '1.0.0-alpha.3',
+		'@asciidoctor/tabs': '1.0.0-beta.3',
+		'@springio/antora-extensions': '1.4.2',
+		'@springio/asciidoctor-extensions': '1.0.0-alpha.8',
+	]
+}

gradle.properties

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+group=org.springframework.shell
+description=Spring GraphQL Docs Site

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists