Add dbt documentation site with GitHub Pages and CI/CD auto-update

.github/GITHUB_PAGES_SETUP.md

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+# Setting Up GitHub Pages for dbt Documentation
+
+This guide explains how to enable GitHub Pages for the dbt documentation site.
+
+## Automatic Setup
+
+The GitHub Actions workflow (`.github/workflows/deploy-dbt-docs.yml`) is configured to automatically deploy documentation to GitHub Pages when changes are pushed to the `main` branch.
+
+## Repository Configuration
+
+To enable GitHub Pages deployment, a repository administrator needs to configure the following:
+
+### Step 1: Enable GitHub Pages
+
+1. Go to your repository on GitHub
+2. Navigate to **Settings** > **Pages**
+3. Under **Build and deployment**:
+   - **Source**: Select "GitHub Actions"
+   - This allows the workflow to deploy directly without using a specific branch
+
+### Step 2: Run the Workflow
+
+After merging this PR to the `main` branch:
+
+1. The workflow will automatically trigger
+2. It will generate the dbt documentation
+3. Deploy it to GitHub Pages
+
+### Step 3: Access the Documentation
+
+Once deployed, the documentation will be available at:
+- **URL**: `https://summers-team.github.io/school-m2-bi-project/`
+
+## Workflow Details
+
+The workflow performs the following steps:
+
+1. **Build Job**:
+   - Checks out the repository
+   - Sets up Python 3.12
+   - Installs dependencies using `uv`
+   - Generates dbt documentation using `dbt docs generate --empty-catalog --no-compile`
+   - Prepares documentation files for deployment
+   - Uploads the artifact for deployment
+
+2. **Deploy Job**:
+   - Deploys the artifact to GitHub Pages
+   - Creates the `github-pages` environment
+
+## Manual Workflow Trigger
+
+You can also manually trigger the workflow:
+
+1. Go to **Actions** > **Deploy dbt Docs to GitHub Pages**
+2. Click **Run workflow**
+3. Select the `main` branch
+4. Click **Run workflow**
+
+## Troubleshooting
+
+If the deployment fails:
+
+1. **Check Permissions**: Ensure the repository has GitHub Pages enabled and the workflow has the necessary permissions
+2. **Review Workflow Logs**: Go to the Actions tab and review the logs for any errors
+3. **Verify dbt Configuration**: Ensure the dbt project structure is correct and models can be parsed
+
+## Local Preview
+
+To preview the documentation locally before deployment, see the instructions in [`dbt/README.md`](../dbt/README.md).

.github/workflows/deploy-dbt-docs.yml

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+---
+name: Deploy dbt Docs to GitHub Pages
+
+# This workflow generates dbt documentation and deploys it to GitHub Pages
+#
+# Setup Required:
+# 1. Go to repository Settings > Pages
+# 2. Under "Build and deployment", set Source to "GitHub Actions"
+# 3. For more details, see .github/GITHUB_PAGES_SETUP.md
+#
+# The workflow runs automatically on:
+# - Push to main branch
+# - Manual trigger via workflow_dispatch
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between
+# the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these
+# production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
+
+      - name: Install dependencies
+        run: |
+          uv sync
+
+      - name: Generate dbt docs
+        run: |
+          cd dbt
+          # Create a minimal profiles.yml for docs generation
+          # (no connection needed)
+          cat > profiles.yml << EOF
+          projet_m2_bi:
+            outputs:
+              docs:
+                type: bigquery
+                method: oauth
+                project: dummy-project
+                dataset: dummy_dataset
+                threads: 1
+                location: US
+            target: docs
+          EOF
+          # Parse the project first
+          uv run --project .. dbt parse --profiles-dir .
+          # Generate documentation without catalog
+          # (no database connection required)
+          uv run --project .. \
+            dbt docs generate --profiles-dir . \
+            --empty-catalog --no-compile
+        continue-on-error: false
+
+      - name: Prepare docs for GitHub Pages
+        run: |
+          mkdir -p gh-pages
+          cp -r dbt/target/* gh-pages/
+          # Create index.html redirect to the dbt docs
+          cat > gh-pages/index.html << 'EOF'
+          <!DOCTYPE html>
+          <html>
+          <head>
+            <meta charset="utf-8">
+            <title>dbt Documentation</title>
+            <meta http-equiv="refresh" content="0; url=./index.html">
+            <link rel="canonical" href="./index.html">
+          </head>
+          <body>
+            <p>
+              Redirecting to
+              <a href="./index.html">dbt documentation</a>...
+            </p>
+          </body>
+          </html>
+          EOF
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: 'gh-pages'
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -142,6 +142,11 @@ docs/_build/
 .pybuilder/
 target/
 
+# dbt
+dbt/target/
+dbt/dbt_packages/
+dbt/logs/
+
 # Jupyter Notebook
 .ipynb_checkpoints
 

IMPLEMENTATION_SUMMARY.md

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+# dbt Documentation Implementation Summary
+
+This document summarizes the implementation of automated dbt documentation with GitHub Pages and CI/CD.
+
+## What Was Implemented
+
+### 1. GitHub Actions Workflow
+**File:** `.github/workflows/deploy-dbt-docs.yml`
+
+The workflow automatically:
+- Triggers on every push to the `main` branch
+- Can be manually triggered via GitHub UI
+- Installs Python 3.12 and uv package manager
+- Syncs project dependencies
+- Parses the dbt project
+- Generates documentation without requiring a database connection
+- Deploys the documentation to GitHub Pages
+
+**Key Features:**
+- No database connection required for CI/CD (uses `--empty-catalog` flag)
+- Proper permissions for GitHub Pages deployment
+- Concurrent deployment protection
+- Clear comments explaining setup requirements
+
+### 2. Local Development Support
+
+#### mise Tasks
+**File:** `mise.toml`
+
+Added two convenient tasks:
+```bash
+# Generate documentation
+mise run dbt:docs:generate
+
+# Generate and serve documentation
+mise run dbt:docs:serve
+```
+
+These tasks:
+- Automatically create a minimal `profiles.yml` if needed
+- Generate documentation without database connection
+- Serve documentation at http://localhost:8080
+
+#### Documentation Updates
+**File:** `dbt/README.md`
+
+Added comprehensive instructions for:
+- Accessing the live documentation site
+- Generating docs locally (both with mise and manually)
+- Serving docs locally
+- Understanding what the documentation includes
+
+### 3. Setup Guide
+**File:** `.github/GITHUB_PAGES_SETUP.md`
+
+Complete guide covering:
+- How to enable GitHub Pages in repository settings
+- How to verify deployment
+- How to manually trigger the workflow
+- Troubleshooting tips
+- Links to documentation
+
+### 4. Main README Update
+**File:** `README.md`
+
+Added:
+- Prominent link to the documentation site
+- Description of documentation features
+- Reference to dbt README for local preview
+
+### 5. .gitignore Updates
+**File:** `.gitignore`
+
+Added explicit entries for:
+- `dbt/target/` - Generated documentation
+- `dbt/dbt_packages/` - Downloaded packages
+- `dbt/logs/` - Log files
+
+## How to Use
+
+### For Repository Administrators
+
+1. **Enable GitHub Pages:**
+   - Go to repository Settings > Pages
+   - Under "Build and deployment", set Source to "GitHub Actions"
+   - See `.github/GITHUB_PAGES_SETUP.md` for detailed instructions
+
+2. **Deploy Documentation:**
+   - Merge this PR to the `main` branch
+   - The workflow will automatically run and deploy
+   - Documentation will be available at: https://summers-team.github.io/school-m2-bi-project/
+
+### For Contributors
+
+1. **View Online Documentation:**
+   - Visit: https://summers-team.github.io/school-m2-bi-project/
+
+2. **Preview Documentation Locally:**
+   ```bash
+   # Using mise (recommended)
+   mise run dbt:docs:serve
+
+   # Or manually
+   cd dbt
+   uv run --project .. dbt parse
+   uv run --project .. dbt docs generate --empty-catalog --no-compile
+   uv run --project .. dbt docs serve
+   ```
+
+3. **Open Browser:**
+   - Navigate to http://localhost:8080
+
+## Technical Details
+
+### Why `--empty-catalog`?
+
+The `--empty-catalog` flag allows dbt to generate documentation without connecting to the database. This is important for:
+- CI/CD environments without database credentials
+- Contributors who want to preview docs structure without database access
+- Faster documentation generation
+
+**Note:** When generating docs with a database connection, dbt will include additional metadata like row counts, column types from the actual database, and freshness information.
+
+### Documentation Contents
+
+The generated documentation includes:
+- **Data lineage graphs:** Visual representation of model dependencies
+- **Model descriptions:** Markdown documentation for each model
+- **Column-level documentation:** Descriptions and metadata for each column
+- **Test coverage:** Information about data quality tests
+- **Source definitions:** Documentation for raw data sources
+- **Macro definitions:** Reusable SQL snippets and their documentation
+
+### Files Generated
+
+The documentation generation creates:
+- `index.html` - Main documentation interface
+- `manifest.json` - dbt project metadata
+- `catalog.json` - Database catalog information (empty when using `--empty-catalog`)
+- `semantic_manifest.json` - Semantic layer information
+
+## Validation
+
+### Local Testing Completed
+✅ Documentation generation works without database connection  
+✅ Generated HTML is valid and contains dbt docs  
+✅ mise tasks work correctly  
+✅ YAML workflow file is properly formatted  
+✅ No security vulnerabilities detected  
+
+### Next Steps
+1. Merge PR to main branch
+2. Enable GitHub Pages in repository settings
+3. Verify workflow runs successfully
+4. Access documentation at the GitHub Pages URL
+
+## Troubleshooting
+
+If the workflow fails:
+
+1. **Check Workflow Logs:**
+   - Go to Actions tab in GitHub
+   - Click on the failed workflow run
+   - Review the logs for errors
+
+2. **Common Issues:**
+   - GitHub Pages not enabled: Enable in Settings > Pages
+   - Permissions error: Ensure workflow has `pages: write` permission
+   - Parsing error: Check dbt project structure and model definitions
+
+3. **Local Testing:**
+   - Always test locally first using `mise run dbt:docs:generate`
+   - Check that models can be parsed successfully
+
+## Support
+
+For more information:
+- **dbt Documentation:** https://docs.getdbt.com/docs/collaborate/documentation
+- **GitHub Pages:** https://docs.github.com/en/pages
+- **GitHub Actions:** https://docs.github.com/en/actions
+- **Setup Guide:** `.github/GITHUB_PAGES_SETUP.md`