Add Publish from Azure DevOps (#10213)

* Add Publish from Azure DevOps

* Add to TOC

---------

Co-authored-by: green-habit <thegreenhabit.official@gmail.com>
Co-authored-by: Yufei Huang <yufeih@live.com>

docs/docs/publish-azure-devops.md

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+# Deploy to GitHub Pages from Azure DevOps
+
+
+### 1. **Create a GitHub Personal Access Token (PAT)**
+You will need a GitHub PAT with repo permissions to allow Azure DevOps to push to the GitHub Pages branch.
+
+- Go to your GitHub account > **Settings** > **Developer settings** > **Personal Access Tokens**.
+- Click on **Generate new token** and select the required repo permissions.
+- Save the token somewhere secure as it will be used in the Azure DevOps pipeline.
+
+### 2. **Create Azure DevOps Pipeline**
+
+#### a. **Setup DocFX**
+Ensure that you have a `docfx.json` configuration file in your repository. This will define how DocFX generates your documentation.
+
+- Install DocFX locally on your development machine and create the configuration:
+
+  ```bash
+  docfx init -q
+  ```
+
+This will generate the `docfx.json` file, which you can configure to specify input and output directories, build settings, etc.
+
+#### b. **Azure Pipelines YAML File**
+
+Create an Azure DevOps pipeline YAML file (e.g., `azure-pipelines.yml`) in the root of your project to automate the build and deployment.
+
+Here is a sample pipeline YAML configuration for DocFX:
+
+```yaml
+trigger:
+  branches:
+    include:
+      - main  # Trigger on main branch
+
+pool:
+  vmImage: 'ubuntu-latest'  # Use the latest Ubuntu VM
+
+variables:
+  - group: GitHubPAT
+
+steps:
+  # Step 1: Install DocFX
+  - task: UseDotNet@2
+    inputs:
+      packageType: 'sdk'
+      version: '8.x'  # Ensure you have .NET SDK installed
+      installationPath: $(Agent.ToolsDirectory)/dotnet
+
+  - script: |
+      dotnet tool install -g docfx
+    displayName: 'Install DocFX'
+
+  # Step 2: Build the Documentation using DocFX
+  - script: |
+      docfx build
+    displayName: 'Build Documentation'
+
+  # Step 3: Deploy to GitHub Pages
+  - task: Bash@3
+    displayName: 'Deploy to GitHub Pages'
+    inputs:
+      targetType: 'inline'
+      script: |
+        git config --global user.email "your-email@example.com"
+        git config --global user.name "Your Name"
+        git clone --branch gh-pages https://$GITHUB_PAT@github.com/$GITHUB_REPO.git out
+        rm -rf out/*
+        cp -r _site/* out/
+        cd out
+        git add --all
+        git commit -m "Update documentation"
+        git push origin gh-pages
+    env:
+      GITHUB_PAT: $(GITHUB_PAT)  # The GitHub Personal Access Token
+      GITHUB_REPO: your-github-username/your-repo-name  # Update with your repo details
+```
+
+#### c. **Setup Azure Pipeline Variables**
+
+- Go to **Azure DevOps** > **Pipelines** > **Library**.
+- Create a new pipeline variable group called GitHubPAT.
+- Add a new variable named GITHUB_PAT and set the value to the GitHub Personal Access Token you created earlier. Mark this variable as secret.
+
+### 3. **Configure GitHub Pages**
+
+- Go to your GitHub repository.
+- Under **Settings** > **Pages**, set the source branch to gh-pages.
+
+### 4. **Run the Pipeline**
+
+- Commit the azure-pipelines.yml file to your repository and trigger the pipeline.
+- Azure DevOps will now:
+  1. Install DocFX.
+  2. Build the documentation.
+  3. Deploy the documentation to the gh-pages branch in GitHub.
+
+### 5. **Access the Documentation**
+
+After the pipeline finishes, your documentation will be available in the github-pages deployments.

docs/docs/toc.yml

@@ -14,6 +14,7 @@
 
 - name: Advanced
 - href: additional-languages.md
+- href: ./publish-azure-devops.md
 
 - name: Reference
 - href: ../reference/docfx-json-reference.md