### Example GitHub Custom Property Configurations

Source: https://wellarchitected.github.com/library/governance/recommendations/managing-repositories-at-scale/custom-properties-best-practices

Demonstrates example configurations for GitHub repository custom properties, illustrating how to define metadata for different types of repositories based on their criticality, compliance needs, and technical characteristics. These examples can be adapted to specific organizational requirements.

```yaml
# Financial services repository (SOX, PCI DSS)
compliance-frameworks: ["SOX", "PCI-DSS"]
data-classification: "Restricted"
business-criticality: "Critical"
environment: "Production"
public-facing: "true"

# Platform service repository
service-tier: "Platform"
business-criticality: "Critical"
owner-team: "platform-ops"
environment: "Production"

# Legacy modernization candidate
tech-stack: ["Java", "Spring Boot"]
architecture-pattern: "Monolith"
modernization-candidate: "true"
migration-priority: "High"
business-criticality: "Medium"

```

--------------------------------

### Run Compression Test on MP4 File (Binary)

Source: https://wellarchitected.github.com/library/architecture/recommendations/scaling-git-repositories/when-to-use-git-lfs

This example demonstrates running the compression test script on a binary file (e.g., `.mp4`). Binary files typically show low compression ratios, suggesting Git LFS might be more appropriate for managing them in a repository.

```bash
./lfstest.rb Untitled.mp4

```

--------------------------------

### Install gh-language GitHub CLI Extension

Source: https://wellarchitected.github.com/library/collaboration/recommendations/scaling-actions-reusability

Installs the 'gh-language' extension for the GitHub CLI, which helps analyze language trends across repositories. Ensure you have the GitHub CLI installed before running this command.

```bash
gh extension install CallMeGreg/gh-language
```

--------------------------------

### Run Compression Test on CSV File (Text)

Source: https://wellarchitected.github.com/library/architecture/recommendations/scaling-git-repositories/when-to-use-git-lfs

This example shows the compression test script applied to a text file (e.g., `.csv`). Text files usually exhibit high compression ratios, indicating that Git's native version control is likely sufficient and efficient for these types of files.

```bash
./test.rb users1.csv

```

--------------------------------

### Generate SBOM for Software Releases (GitHub Actions)

Source: https://wellarchitected.github.com/library/scenarios/nist-ssdf-implementation

This GitHub Actions workflow generates a Software Bill of Materials (SBOM) in SPDX JSON format for a software release. It uses the `anchore/sbom-action` to create the SBOM and `actions/attest-sbom` to attest to its integrity, ensuring transparency and aiding in vulnerability analysis.

```YAML
name: Generate SBOM
on:
  push:
    tags:
      - 'v*'

permissions:
  id-token: write
  attestations: write
  contents: read

jobs:
  build-and-generate-sbom:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5

      # Build steps for your software would go here

      - name: Generate SBOM
        uses: anchore/sbom-action@v0
        with:
          format: spdx-json
          output-file: sbom.spdx.json

      - name: Attest SBOM
        uses: actions/attest-sbom@v3
        with:
          subject-path: '${{ github.workspace }}'
          sbom-path: 'sbom.spdx.json'

```

--------------------------------

### Disable Yarn Scripts and Ensure Immutable Installs

Source: https://wellarchitected.github.com/library/application-security/recommendations/managing-dependency-threats

Configure Yarn (v2+) to disable package scripts and ensure immutable installs, preventing lockfile modifications. This enhances security by catching unexpected dependency changes. Legitimate script usage can be explicitly enabled per package.

```yaml
enableScripts: false
enableImmutableInstalls: true
defaultSemverRangePrefix: ""
```

```json
{
  "dependenciesMeta": {
    "esbuild": {
      "built": true
    }
  }
}
```

--------------------------------

### Reference Reusable Workflow in GitHub Actions

Source: https://wellarchitected.github.com/library/collaboration/recommendations/scaling-actions-reusability

Demonstrates how to reference a reusable workflow from a shared location within a GitHub Actions workflow file. This example specifies the workflow path, version, input parameters, and secrets required.

```yaml
# Example of referencing a reusable workflow
name: Build and Test

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    uses: acme-shared-actions/build-workflows/.github/workflows/build-java-maven.yml@v2
    with:
      java-version: '17'
      run-tests: true
    secrets:
      maven-repo-token: ${{ secrets.MAVEN_REPO_TOKEN }}

```