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pro-bpa-scanner

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BPA scanning for Fabric semantic models without Premium capacity or XMLA endpoints. Vibe-coded with Claude Code.

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# Pro BPA Scanner

[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://raw.githubusercontent.com/vdvoorder/pro-bpa-scanner/main/LICENSE)
[![PowerShell 5.1+](https://img.shields.io/badge/PowerShell-5.1%2B-blue.svg)](https://docs.microsoft.com/powershell/)
[![Python 3.8+](https://img.shields.io/badge/Python-3.8%2B-green.svg)](https://www.python.org/)

**BPA scanning for Fabric semantic models in Pro workspaces — no Premium capacity or XMLA endpoints required.**

Combines [Fabric CLI](https://aka.ms/fabric-cli) (REST API extraction) with [Tabular Editor 2](https://github.com/TabularEditor/TabularEditor) (BPA rule engine) to analyze semantic models headlessly, enabling CI/CD automation for any Fabric workspace.

## Why This Tool?

| Approach | XMLA Required | Premium Required | CI/CD Ready |
|----------|---------------|------------------|-------------|
| Tabular Editor direct | Yes | Yes | Partial |
| Fabric Notebooks (semantic-link-labs) | No | Yes | Partial |
| **This tool** | **No** | **No** | **Yes** |

## Output

![Dashboard Overview](https://raw.githubusercontent.com/vdvoorder/pro-bpa-scanner/main/docs/images/dashboard.png)

## Quick Start

```powershell
# Scan all models in a workspace (.Workspace suffix optional)
./scan-workspaces.ps1 -Workspaces "YourWorkspace"

# Scan multiple workspaces
./scan-workspaces.ps1 -Workspaces "Production", "Development"

# Scan specific model
./scan-workspaces.ps1 -Workspaces "YourWorkspace" -Model "YourModel.SemanticModel"

# Filter by pattern
./scan-workspaces.ps1 -Workspaces "YourWorkspace" -Filter "Sales.*"

# With custom rules
./scan-workspaces.ps1 -Workspaces "YourWorkspace" -CustomRulesFile "./my-rules.json"
```

![Scan Start](https://raw.githubusercontent.com/vdvoorder/pro-bpa-scanner/main/docs/images/scan-start.png)

![Scan Complete](https://raw.githubusercontent.com/vdvoorder/pro-bpa-scanner/main/docs/images/scan-complete.png)

## How It Works

![Architecture](https://raw.githubusercontent.com/vdvoorder/pro-bpa-scanner/main/docs/images/architecture.svg)

See [docs/architecture.md](docs/architecture.md) for detailed component documentation.

## Parameters

| Parameter | Required | Description |
|-----------|----------|-------------|
| `-Workspaces` | Yes | One or more workspace names (`.Workspace` suffix optional) |
| `-Model` | No | Specific model to scan (`.SemanticModel` suffix required) |
| `-Filter` | No | Regex pattern to filter models |
| `-RulesFile` | No | Path to BPA rules JSON (default: `./BPARules-PowerBI.json`) |
| `-CustomRulesFile` | No | Path to custom rules JSON (merged with default rules) |
| `-OutputDir` | No | Output directory for reports (default: `./output`) |

## View Results

```bash
# Python dashboard (recommended)
python bpa-dashboard.py

# Or process JSON directly
cat output/bpa-analysis-*.json | jq '.violations'
```

## Prerequisites

See [PREREQUISITES.md](PREREQUISITES.md) for installation requirements:
- Fabric CLI (`fab`) - https://aka.ms/fabric-cli
- Tabular Editor 2 - https://github.com/TabularEditor/TabularEditor/releases
- PowerShell 5.1+
- Python 3.8+ with `rich` library (for dashboard only)

## Output Format

```json
{
  "metadata": {
    "timestamp": "2025-12-15T12:00:00Z",
    "model": "Sales Model",
    "workspace": "Production"
  },
  "modelStructure": {
    "tables": 10,
    "measures": 25,
    "relationships": 8
  },
  "violations": [
    {
      "rule": "DAX_DIVISION_COLUMNS",
      "object": "Sales.Revenue Ratio",
      "severity": 3,
      "message": "Avoid division (use DIVIDE function instead)"
    }
  ]
}
```

## Severity Levels

| Level | Name | Action |
|-------|------|--------|
| 3 | Error | Fix before deployment |
| 2 | Warning | Consider fixing |
| 1 | Info | Optional improvement |

## CI/CD Integration

See [.github/workflows/bpa-scan.yml](.github/workflows/bpa-scan.yml) for a GitHub Actions template.

Required secrets:
- `FABRIC_CLIENT_ID` - Service principal app ID
- `FABRIC_CLIENT_SECRET` - Service principal secret
- `FABRIC_TENANT_ID` - Azure AD tenant ID

## Project Structure

```
pro-bpa-scanner/
├── scan-workspaces.ps1              # Main scanner entry point
├── lib/                      # PowerShell modules
│   ├── Discover-Models.ps1   # Workspace model discovery
│   ├── Extract-Model.ps1     # TMDL extraction via Fabric CLI
│   ├── Analyze-Model.ps1     # BPA analysis via Tabular Editor 2
│   └── Format-Report.ps1     # JSON report generation
├── bpa_dashboard/            # Python dashboard package
├── bpa-dashboard.py          # Dashboard entry point
├── BPARules-PowerBI.json     # BPA rule definitions
├── output/                   # JSON analysis reports (generated)
├── temp/                     # TMDL extraction (temporary, auto-cleaned)
└── PREREQUISITES.md          # Installation guide
```

## Known Limitations

### Calculated Table Column Detection

When comparing scanner results with Tabular Editor 3 GUI connected directly to a model, the scanner may report fewer violations. This is due to a limitation in Tabular Editor 2 CLI mode when analyzing TMDL exports.

**Affected rules** (violations on Calculated Table Columns may be missed):
- `APPLY_FORMAT_STRING_COLUMNS` - Provide format string for visible numeric columns
- `META_AVOID_FLOAT` - Do not use floating point data types
- `META_SUMMARIZE_NONE` - Don't summarize numeric columns

**Root cause**: Tabular Editor 2 CLI analyzing TMDL exports does not evaluate certain metadata rules against Calculated Table Columns the same way TE3 GUI does when connected to a live model.

**Impact**: Scanner results are directionally accurate but may undercount by ~5-15% for models with many Calculated Table Columns. Critical violations (DAX issues, unused columns, relationship naming) are fully detected.

## Acknowledgments

- [Kurt Buhler](https://github.com/data-goblin) - [fabric-cli](https://github.com/data-goblin/fabric-cli) reference documentation used in developing this solution
- [Kurt Buhler](https://github.com/data-goblin) - [claude-goblin](https://github.com/data-goblin/claude-goblin) TUI design that inspired the dashboard
- [Daniel Otykier](https://github.com/otykier) - Tabular Editor and Best Practice Analyzer
- [TabularEditor/BestPracticeRules](https://github.com/TabularEditor/BestPracticeRules) - Official BPA rule definitions

## License

[MIT](LICENSE)

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