📡 go-broadcast

Stateless File Sync Orchestrator for Repository Management

`CI / CD`		`Quality`
`Security`		`Community`

`Project Navigation`

🚀 `Quick Start`	📚 `Documentation`	⚡ `Performance`
✨ `Key Features`	🧪 `Examples & Tests`	👥 `Maintainers`
🔍 `How It Works`	🛠️ `Code Standards`	🤝 `Contributing`
💡 `Usage Examples`	🤖 `AI Usage`	⚖️ `License`

⚡ Quick Start

Get up and running with go-broadcast in under 5 minutes!

Prerequisites

Go 1.24+ (supported release) and GitHub CLI installed
GitHub authentication: gh auth login
MAGE-X (optional, for building from source)

Installation

Option 1: Pre-built Binary (Recommended)

Download the latest release for your platform from GitHub Releases, or use the GitHub CLI:

# macOS (Apple Silicon)
gh release download --repo mrz1836/go-broadcast --pattern '*darwin*arm64*' -D /tmp && \
  tar -xzf /tmp/go-broadcast_*_darwin_arm64.tar.gz -C /tmp && \
  sudo mv /tmp/go-broadcast /usr/local/bin/

# macOS (Intel)
gh release download --repo mrz1836/go-broadcast --pattern '*darwin*amd64*' -D /tmp && \
  tar -xzf /tmp/go-broadcast_*_darwin_amd64.tar.gz -C /tmp && \
  sudo mv /tmp/go-broadcast /usr/local/bin/

# Linux (x86_64)
gh release download --repo mrz1836/go-broadcast --pattern '*linux*amd64*' -D /tmp && \
  tar -xzf /tmp/go-broadcast_*_linux_amd64.tar.gz -C /tmp && \
  sudo mv /tmp/go-broadcast /usr/local/bin/

Option 2: Build from Source

git clone https://github.com/mrz1836/go-broadcast.git
cd go-broadcast && go install ./cmd/go-broadcast

Option 3: Upgrade Existing Installation

go-broadcast upgrade --force

Create Configuration

Create a sync.yaml file:

version: 1
groups:
  - name: "Default Sync"
    id: "default"
    description: "Basic file and directory synchronization"
    priority: 1
    enabled: true
    source:
      repo: "mrz1836/template-repo"
      branch: "master"
    targets:
      - repo: "mrz1836/target-repo"
        files:
          - src: ".github/workflows/ci.yml"
            dest: ".github/workflows/ci.yml"
        directories:
          - src: ".github/actions"
            dest: ".github/actions"
            exclude: ["*.out", "*.test"]
        transform:
          repo_name: true

Run Sync

# Validate configuration
go-broadcast validate --config sync.yaml

# Preview changes (dry run)
go-broadcast sync --dry-run --config sync.yaml

# Execute sync
go-broadcast sync --config sync.yaml

Example Dry-Run Output

When using --dry-run, go-broadcast provides clean, readable output showing exactly what would happen:

🔍 📋 COMMIT PREVIEW
┌─────────────────────────────────────────────────────────────────
│ Message: sync: update 2 files from source repository
│ Files: 2 changed
│ README.md, .mage.yaml
└─────────────────────────────────────────────────────────────────

📄 FILE CHANGES:
   ✨ README.md (added) (+1249 bytes)
   📝 .mage.yaml (modified) (+45 bytes)

🔍 DRY-RUN: Pull Request Preview
┌─────────────────────────────────────────────────────────────────
│ Repository: company/service-name
│ Branch: chore/sync-files-20250130-143052-abc123f
├─────────────────────────────────────────────────────────────────
│ Title: [Sync] Update project files from source repository (abc123f)
├─────────────────────────────────────────────────────────────────
│ ## What Changed
│ * Updated project files to synchronize with the latest ch...
│
│ ## Changed Files
│
│ - `README.md` (added)
│ - `.mage.yaml` (modified)
└─────────────────────────────────────────────────────────────────

✅ DRY-RUN SUMMARY: Repository sync preview completed successfully
   📁 Repository: company/service-name
   🌿 Branch: chore/sync-files-20250130-143052-abc123f
   📝 Files: 2 would be changed
   🔗 Commit: dry-run-commit-sha
   💡 Run without --dry-run to execute these changes

That's it! 🎉 go-broadcast automatically:

Executes each group in priority order
Clones your template repository
Applies configured transformations
Creates a branch in each target repository
Commits synchronized files
Opens a pull request for review

💡 Pro tip: go-broadcast includes a built-in coverage system, enterprise performance, and comprehensive logging & debugging - explore the features below!

Install MAGE-X build tool

Want to contribute to go-broadcast? Use MAGE-X for building, testing, linting, and more.

# Install MAGE-X for development and building
go install github.com/mrz1836/mage-x/cmd/magex@latest
magex update:install

✨ Key Features

go-broadcast is a production-grade repository synchronization platform with enterprise performance:

🚀 Core Synchronization Engine

Stateless architecture - All state derived from GitHub (branches, PRs, commits)
File & directory sync - Individual files or entire directories with intelligent filtering
Mixed sync operations - Combine files and directories in single configurations
Smart diff detection - Only syncs files that actually changed (content-based)
Zero-downtime operations - Works at any scale without state corruption
Full audit trail - Every operation tracked in Git history with metadata

⚡ Enterprise Performance

587M+ ops/sec - Binary detection with zero memory allocations
239M+ ops/sec - Content comparison for identical files
32ms/1000 files - Directory processing with concurrent workers
90%+ API reduction - GitHub Tree API optimization
Worker pools - Concurrent task execution with panic recovery
TTL caching - High-performance cache with 13.5M+ ops/sec

🎯 Intelligent Configuration

Group-based organization - Logical grouping with names, IDs, and descriptions
Priority execution - Groups execute in order (lower number = higher priority)
Dependency management - Groups can depend on successful completion of others
Enable/disable control - Toggle groups without removing configuration
Reusable lists - Define file/directory lists once, use everywhere
Module-aware sync - Version management for Go modules with semantic versioning

🗄️ Database Backend

SQLite storage - Structured configuration in queryable database (pure Go, no CGO)
YAML import/export - Seamless migration and backwards compatibility
Universal --from-db flag - Works with all commands (sync, status, cancel, validate, modules)
Write-time validation - Catch errors before they affect repositories
Queryable config - "Which repos sync this file?" answered instantly
CLI management - Full CRUD operations without editing YAML
Transaction safety - All-or-nothing imports with automatic rollback
Repository analytics - Track stars, forks, issues, PRs, and security alerts across orgs
Batched GraphQL collection - Collect metadata for 25 repos per API call (96% reduction)
Security alert tracking - Dependabot, code scanning, and secret scanning alerts with severity
Point-in-time snapshots - Historical trend data for repository metrics
Full documentation →

🔄 Advanced Transformations

Variable substitution - Template variables ({{VAR}} and ${VAR} syntax)
Go module updates - Automatic repository name transformation
Pattern-based transforms - Apply to all files in directories
Context-aware - Different transforms per target repository

🤖 Automation & CI/CD

Automatic PR creation - Creates pull requests with rich metadata & AI-generated descriptions
PR management - Auto-assign reviewers, assignees, and labels
Automerge labels - Add configurable automerge labels to PRs with --automerge flag
Global settings - Organization-wide PR assignments
Branch naming - Encoded metadata for state tracking
Cancel operations - Abort active syncs with cleanup
Self-updating - Built-in upgrade command with version management

📊 Developer Experience

Rich dry-run mode - Beautiful previews with exact change details
Component debugging - Targeted debugging (--debug-git, --debug-api)
Verbose logging - Multi-level verbosity (-v, -vv, -vvv)
Progress tracking - Real-time sync progress with statistics
Diagnostic tool - Comprehensive system information collection
Status command - Repository synchronization status overview

🛡️ Production Ready

85%+ test coverage - Comprehensive unit and integration tests
Fuzz testing - Security-critical components fuzz tested
60+ linters - Zero tolerance for code issues via golangci-lint
Vulnerability scanning - govulncheck, nancy, CodeQL, OSSAR
OpenSSF Scorecard - Supply chain security assessment
Secret detection - gitleaks integration prevents leaks

🎨 Smart Defaults & Exclusions

Automatic exclusions - Filters out *.out, *.test, *.exe, .DS_Store, tmp/
Custom patterns - Add your own exclusion patterns per directory
Hidden file control - Include or exclude dotfiles as needed
Binary detection - Intelligent binary file detection prevents corruption
Preserve structure - Maintains nested directory hierarchies

🔍 How It Works

go-broadcast uses a stateless architecture that tracks synchronization state through GitHub itself - no databases or state files needed!

State Tracking Through Branch Names

Every sync operation creates a branch with encoded metadata:

[chore/sync-files]-[group1]-[20250123-143052]-[abc123f]
        │             │              │            │
        │             │              │            └─── Source branch commit SHA (7 chars)
        │ 		 	  │              └──────────────── Timestamp (YYYYMMDD-HHMMSS)
        │ 			  └─────────────────────────────── Group ID (from config)
        └───────────────────────────────────────────── Configurable prefix

How go-broadcast Determines What to Sync

State Discovery - Queries GitHub to find:
- Latest commit in source repository
- All sync branches in target repositories
- Open sync pull requests

Smart Comparison - For each target:

Source commit: abc123f (latest)
Target's last sync: def456g (from branch name)
Status: Behind → Needs sync ✓

Content-Based Sync - Only syncs files that actually changed:
- Fetches current files from target (individual files or directory contents)
- Applies transformations to source files
- Compares content byte-by-byte with smart exclusion filtering
- Skips unchanged files and processes directories concurrently

Pull Request Metadata

Each PR includes structured metadata for complete traceability:

<!-- go-broadcast metadata
group:
  id: default
  name: Default Sync
source:
  repo: company/template-repo
  branch: master
  commit: abc123f7890
files:
  - src: .github/workflows/ci.yml
    dest: .github/workflows/ci.yml
directories:
  - src: .github/actions
    dest: .github/actions
    excluded: ["*.out", "*.test"]
    files_synced: 87
    processing_time_ms: 4
performance:
  total_files: 88
  api_calls_saved: 79
timestamp: 2025-01-23T14:30:52Z
-->

Why This Approach is Powerful

No State Files - Everything lives in GitHub
Atomic Operations - Each sync is self-contained
Full Audit Trail - Branch and PR history shows all syncs
Disaster Recovery - State can be reconstructed from GitHub
Works at Scale - No state corruption with concurrent syncs

💡 Usage Examples

Common Use Cases

Sync CI/CD workflows across microservices

version: 1
groups:
  - name: "CI/CD Templates"
    id: "ci-cd"
    priority: 1
    enabled: true
    source:
      repo: "company/ci-templates"
      branch: "main"
    targets:
      - repo: "company/user-service"
        blob_size_limit: "0"  # Disable filter for this target
        files:
          - src: "workflows/ci.yml"
            dest: ".github/workflows/ci.yml"
        transform:
          variables:
            SERVICE_NAME: "user-service"

Sync entire directories with smart exclusions

version: 1
groups:
  - name: "GitHub Configuration"
    id: "github-config"
    priority: 1
    enabled: true
    source:
      repo: "company/ci-templates"
      branch: "main"
    targets:
      - repo: "company/microservice-a"
        directories:
          - src: ".github/workflows"
            dest: ".github/workflows"
            exclude: ["*-local.yml", "*.disabled"]
          - src: ".github/actions"
            dest: ".github/actions"
            # Smart defaults automatically exclude: *.out, *.test, *.exe, **/.DS_Store
        transform:
          repo_name: true

Mixed file and directory synchronization

version: 1
groups:
  - name: "Mixed Content Sync"
    id: "mixed-sync"
    priority: 1
    enabled: true
    source:
      repo: "company/template-repo"
      branch: "main"
    targets:
      - repo: "company/service"
        files:
          - src: "Makefile"
            dest: "Makefile"
        directories:
          - src: "configs"
            dest: "configs"
            exclude: ["*.local", "*.secret"]
        transform:
          variables:
            SERVICE_NAME: "user-service"

Automated PR management with assignees, reviewers, and labels

version: 1
groups:
  - name: "Security Policies"
    id: "security-sync"
    priority: 1
    enabled: true
    source:
      repo: "company/security-templates"
      branch: "main"
    defaults:
      pr_labels: ["automated-sync", "chore"]
      pr_assignees: ["tech-lead", "platform-team"]
      pr_reviewers: ["senior-dev1", "senior-dev2"]
      pr_team_reviewers: ["architecture-team"]
    targets:
      - repo: "company/critical-service"
        files:
          - src: "security/policies.yml"
            dest: "security/policies.yml"
        # Critical service needs security team review
        pr_labels: ["security-update", "high-priority"]
        pr_assignees: ["security-lead"]
        pr_reviewers: ["security-engineer"]
        pr_team_reviewers: ["security-team"]

File and directory cleanup with deletions

version: 1
groups:
  - name: "Repository Cleanup"
    id: "cleanup-sync"
    description: "Clean up obsolete files while syncing new ones"
    priority: 1
    enabled: true
    source:
      repo: "company/template-repo"
      branch: "main"
    targets:
      - repo: "company/service-a"
        # Regular file syncing
        files:
          - src: ".github/workflows/new-ci.yml"
            dest: ".github/workflows/ci.yml"

        # File deletions - remove obsolete files
        # Note: src can be empty or omitted when delete: true
        files:
          - dest: ".github/workflows/old-ci.yml"
            delete: true
          - dest: "deprecated-config.json"
            delete: true

        # Directory operations
        directories:
          - src: ".github/actions"
            dest: ".github/actions"

        # Directory deletions - remove entire directories
        directories:
          - dest: "old-docs"
            delete: true
          - dest: ".github/legacy-workflows"
            delete: true

        transform:
          repo_name: true

Target different branches for development workflows

version: 1
groups:
  - name: "Development Sync"
    id: "dev-sync"
    priority: 1
    enabled: true
    source:
      repo: "company/template-repo"
      branch: "main"
    targets:
      # Sync to main branch (production)
      - repo: "company/service-a"
        branch: "main"
        files:
          - src: ".github/workflows/production.yml"
            dest: ".github/workflows/ci.yml"

      # Sync to develop branch (staging)
      - repo: "company/service-a"
        branch: "develop"
        files:
          - src: ".github/workflows/staging.yml"
            dest: ".github/workflows/ci.yml"
        transform:
          variables:
            ENVIRONMENT: "staging"

      # Sync to feature branch
      - repo: "company/service-b"
        branch: "feature/new-deployment"
        files:
          - src: ".github/workflows/feature.yml"
            dest: ".github/workflows/ci.yml"
        transform:
          variables:
            ENVIRONMENT: "development"

Review and merge pull requests

# Review and merge a single PR
go-broadcast review-pr https://github.com/owner/repo/pull/123

# Review and merge multiple PRs in batch
go-broadcast review-pr \
  https://github.com/owner/repo/pull/123 \
  https://github.com/owner/repo/pull/124 \
  https://github.com/owner/repo/pull/125

# Use short format
go-broadcast review-pr owner/repo#123

# Review all PRs assigned to you (excludes drafts)
go-broadcast review-pr --all-assigned-prs

# Customize the review approval message
go-broadcast review-pr --message "Approved after testing" \
  https://github.com/owner/repo/pull/123

# Preview all assigned PRs without executing (dry run)
go-broadcast review-pr --all-assigned-prs --dry-run

# Review all assigned PRs with custom message
go-broadcast review-pr --all-assigned-prs --message "LGTM"

# Bypass branch protection with admin privileges (requires admin access)
go-broadcast review-pr --bypass https://github.com/owner/repo/pull/123

# Bypass and ignore status checks (dangerous - use with caution)
go-broadcast review-pr --bypass --ignore-checks https://github.com/owner/repo/pull/123

The review-pr command will:

Parse the PR URL(s) to extract owner, repo, and PR number (or fetch all assigned PRs with --all-assigned-prs)
Check if the PR is already merged or closed
Submit an approving review with your message (default: "LGTM")
Detect the repository's preferred merge method (squash, merge, or rebase)
Intelligently merge the PR using a try-and-fallback approach:
- Tries to merge immediately first (optimistic)
- If branch protection blocks merge, automatically enables auto-merge
- Handles merge conflicts, pending checks, and required reviews gracefully

All Assigned PRs Mode (--all-assigned-prs):

Automatically fetches all open pull requests assigned to you
Excludes draft PRs from processing (only ready-for-review PRs are included)
Cannot be used together with explicit PR URLs (mutually exclusive)
Perfect for bulk reviewing and merging your assigned PRs
Works with --dry-run to preview what would be processed
Processes each PR sequentially with the same smart merge behavior

Automerge Label Gating:

When GO_BROADCAST_AUTOMERGE_LABELS is configured, merge operations require the PR to have one of the specified labels
Label present: Review + merge operations proceed as normal
Label missing: Review/comment only, NO merge attempt (safe mode)
No labels configured: Backwards compatible - merge proceeds without label check
This prevents accidental merges and ensures only explicitly approved PRs are merged
Configure via environment variable: GO_BROADCAST_AUTOMERGE_LABELS=automerge,ready-to-merge

Smart Merge Behavior (Try-and-Fallback):

The command uses an intelligent try-first approach for maximum efficiency
Automerge label check: If labels are configured, PRs without the label are review-only
Merge conflicts detected: If the PR has merge conflicts, it enables auto-merge immediately
- Warning: "⚠️ PR has merge conflicts - enabling auto-merge for when conflicts are resolved"
Optimistic merge attempt: For PRs with the automerge label, it tries to merge immediately first
- Success: If merge succeeds, the PR is merged right away ✓
- Branch protection detected: If merge fails due to branch protection policies:
  - Automatically falls back to enabling auto-merge
  - Warning: "⚠️ Branch protection blocking merge - enabling auto-merge"
  - Success: "✓ Auto-merge enabled - will merge when requirements are met"
  - Handles: pending status checks, required reviews, or other protection rules
- Real errors: Other errors (permissions, PR not found, etc.) fail as expected
This ensures PRs get merged without manual intervention once all requirements are satisfied

Admin Bypass Mode (--bypass):

Use --bypass to merge using admin privileges, bypassing branch protection rules
Requires admin access to the repository
By default, still waits for status checks to pass before merging
Use --ignore-checks with --bypass to skip waiting for status checks (dangerous)
Perfect for repos with "automerge" labels or other exceptions to review requirements
Example: go-broadcast review-pr --bypass https://github.com/owner/repo/pull/123

Merge Method Detection:

The command automatically queries the repository settings via GitHub API
Uses the first allowed method in this priority: squash → merge → rebase
Handles all three merge strategies supported by GitHub

Batch Operations:

Process multiple PRs sequentially
Continue on error (doesn't fail fast)
Display summary showing:
- How many PRs were merged immediately
- How many have auto-merge enabled
- How many were review-only (no automerge label)
- How many failed
All PRs are processed even if some fail
Non-zero exit code if any PR fails

Error Handling:

Skips PRs that are already merged (with warning)
Reports PRs that are closed but not merged
Provides clear error messages for failures
Dry-run mode shows what would happen without making changes

Essential Commands

# Validate and preview
go-broadcast validate --config sync.yaml
go-broadcast validate --skip-remote-checks        # Offline validation (no network checks)
go-broadcast validate --source-only               # Only validate source repo access
go-broadcast sync --dry-run --config sync.yaml

# Execute sync
go-broadcast sync --config sync.yaml
go-broadcast sync org/specific-repo --config sync.yaml
go-broadcast sync --clear-cache --config sync.yaml  # Clear module version cache before sync

# Database-backed configuration (alternative to YAML)
go-broadcast db init                              # Initialize database
go-broadcast db init --force                      # Force recreation (destroys existing data)
go-broadcast db import sync.yaml                  # Import existing YAML config
go-broadcast db import --force                    # Force import (replace existing config)
go-broadcast sync --from-db                       # Sync using database config
go-broadcast status --from-db                     # Check status from database
go-broadcast validate --from-db                   # Validate database config
go-broadcast cancel --from-db --groups "core"     # Cancel using database config

# Database status and inspection
go-broadcast db status                            # Show database status (version, table counts)
go-broadcast db status --json                     # Status in JSON format
go-broadcast db diff                              # Compare DB config vs YAML file
go-broadcast db diff --yaml my-config.yaml        # Compare against specific YAML file
go-broadcast db diff --detail                     # Show detailed field-level differences
go-broadcast db validate                          # Validate database consistency
go-broadcast db validate --json                   # Validation results in JSON

# Database export
go-broadcast db export --output backup.yaml       # Export entire config to YAML
go-broadcast db export --group core --output core-group.yaml  # Export specific group
go-broadcast db export --stdout                   # Export to stdout

# Granular CLI management (full reference: docs/database.md)
go-broadcast db group list                        # List all groups
go-broadcast db group enable my-group             # Enable a group
go-broadcast db group disable my-group            # Disable a group
go-broadcast db group create                      # Create a new group
go-broadcast db group update my-group             # Update a group
go-broadcast db group delete my-group             # Delete a group
go-broadcast db target list                       # List all target repositories
go-broadcast db target add owner/repo             # Add a target repository
go-broadcast db target remove target-id           # Remove a target repository
go-broadcast db file-list list                    # List all file lists
go-broadcast db file-list create                  # Create a new file list
go-broadcast db file-list delete list-id          # Delete a file list
go-broadcast db dir-list list                     # List all directory lists
go-broadcast db dir-list create                   # Create a new directory list
go-broadcast db ref add-file-list target-id list-id   # Add file list ref to target
go-broadcast db ref add-dir-list target-id list-id    # Add dir list ref to target
go-broadcast db bulk add-file-list list-id t1 t2      # Add file list to multiple targets
go-broadcast db bulk add-dir-list list-id t1 t2       # Add dir list to multiple targets
# See docs/database.md for complete database documentation

# Repository analytics
go-broadcast analytics sync                       # Collect analytics for all orgs
go-broadcast analytics sync --org mrz1836         # Sync specific organization
go-broadcast analytics sync --security-only       # Security alerts only
go-broadcast analytics status                     # Show analytics status
go-broadcast analytics status mrz1836/go-broadcast # Status for specific repo

# Group-based sync operations
go-broadcast sync --groups "Default Sync" --config sync.yaml        # Sync only one group by name
go-broadcast sync --groups "default" --config sync.yaml             # Sync by group ID
go-broadcast sync --groups "core,security" --config sync.yaml       # Sync multiple groups
go-broadcast sync --skip-groups "experimental" --config sync.yaml   # Skip specific groups
go-broadcast sync --groups "core" org/repo1 --config sync.yaml      # Combine with target filtering

# Automerge configuration
go-broadcast sync --automerge --config sync.yaml                    # Add automerge labels to created PRs
go-broadcast sync --automerge --groups "core" --config sync.yaml    # Automerge with group filtering (adds labels)

# Monitor status of repositories
go-broadcast status --groups "core"
go-broadcast status --groups "core,security"

# Show all groups except specific ones
go-broadcast status --skip-groups "experimental"

# Troubleshooting and diagnostics
go-broadcast diagnose                    # Collect system diagnostic information
go-broadcast diagnose > diagnostics.json # Save diagnostics to file

# Cancel active syncs
go-broadcast cancel                                        # Cancel all active sync operations
go-broadcast cancel org/repo1                              # Cancel syncs for specific repository
go-broadcast cancel --groups "core"                        # Cancel syncs for specific group (much faster!)
go-broadcast cancel --groups "core,security"               # Cancel syncs for multiple groups
go-broadcast cancel --groups "core" org/repo1              # Cancel specific repo in a group
go-broadcast cancel --skip-groups "experimental"           # Cancel all except experimental group
go-broadcast cancel --dry-run                              # Preview what would be cancelled

# Query sync metrics and history
go-broadcast metrics                              # Summary statistics across all sync runs
go-broadcast metrics --last 7d                    # Runs from last 7 days
go-broadcast metrics --last 24h                   # Runs from last 24 hours
go-broadcast metrics --repo owner/repo-name       # Sync history for specific repository
go-broadcast metrics --run SR-20260215-abc123     # Details for a specific run ID
go-broadcast metrics --json                       # Output as JSON
go-broadcast metrics --last 24h --json            # Recent runs in JSON format

# Review and merge pull requests
go-broadcast review-pr <pr-url>                                      # Review and merge single PR
go-broadcast review-pr <url1> <url2> <url3>                         # Batch review and merge multiple PRs
go-broadcast review-pr --message "Looks good!" <pr-url>             # Custom review message
go-broadcast review-pr --dry-run <pr-url>                           # Preview without executing
go-broadcast review-pr owner/repo#123                               # Use short format
go-broadcast review-pr https://github.com/owner/repo/pull/123       # Use full URL
go-broadcast review-pr --all-assigned-prs                           # Review all PRs assigned to you
go-broadcast review-pr --all-assigned-prs --dry-run                 # Preview all assigned PRs
go-broadcast review-pr --all-assigned-prs --message "LGTM"          # Custom message for all assigned PRs
go-broadcast review-pr --bypass <pr-url>                            # Bypass branch protection (admin)
go-broadcast review-pr --bypass --ignore-checks <pr-url>            # Bypass and skip status checks

# Module management
go-broadcast modules list                                         # List all modules in config
go-broadcast modules show github.com/example/module               # Show module details
go-broadcast modules versions github.com/example/module           # Show available versions for a module
go-broadcast modules validate                                     # Validate all module configurations
go-broadcast modules list --from-db                               # List modules from database config

# Upgrade go-broadcast
go-broadcast upgrade                     # Upgrade to latest version
go-broadcast upgrade --check             # Check for updates without upgrading
go-broadcast upgrade --force             # Force upgrade even if already on latest
go-broadcast upgrade --verbose           # Show release notes after upgrade
go-broadcast upgrade --use-binary        # Install pre-built binary instead of go install

Configuration Reference

🔄 File Transformations

transform:
  repo_name: true  # Updates Go module paths
  variables:
    SERVICE_NAME: "my-service"    # {{SERVICE_NAME}} → my-service
    ENVIRONMENT: "production"     # ${ENVIRONMENT} → production

📁 File & Directory Mapping Options

File Mapping:

files:
  - src: "Makefile"         # Copy to same location
    dest: "Makefile"
  - src: "template.md"      # Rename during sync
    dest: "README.md"
  - src: "config/app.yml"   # Move to different directory
    dest: "configs/app.yml"
  - dest: "old-config.json" # Delete file (src can be omitted)
    delete: true
  - dest: "deprecated.yml"  # Delete file with explicit empty src
    src: ""
    delete: true

Directory Mapping:

directories:
  - src: ".github/workflows"           # Basic directory sync
    dest: ".github/workflows"
  - src: ".github/actions"            # Directory with exclusions
    dest: ".github/actions"
    exclude: ["*.out", "*.test", "go-coverage"]
  - src: "docs"                        # Advanced directory options
    dest: "documentation"
    exclude: ["*.tmp", "**/draft/*"]
    preserve_structure: true           # Keep nested structure (default: true)
    include_hidden: true               # Include hidden files (default: true)
    transform:                         # Apply transforms to all files
      variables:
        VERSION: "v2.0"
  - dest: "legacy-docs"                # Delete entire directory
    delete: true
  - dest: "old-scripts"                # Delete directory (src can be omitted)
    src: ""
    delete: true

Smart Default Exclusions: Automatically applied to all directories: *.out, *.test, *.exe, **/.DS_Store, **/tmp/*, **/.git

File and Directory Deletions:

Set delete: true to remove files or directories from target repositories
When deleting, the src field can be omitted or set to an empty string
Deletions are processed alongside regular sync operations
Perfect for cleaning up deprecated files, old CI workflows, or restructuring projects

⚙️ Advanced Configuration

version: 1
groups:
  - name: "Platform Configuration"
    id: "platform-config"
    priority: 1
    enabled: true
    source:
      repo: "org/template-repo"
      branch: "master"
    # Global PR settings applied to ALL targets (merged with target-specific settings)
    global:
      pr_labels: ["automated-sync", "chore"]
      pr_assignees: ["platform-team"]
      pr_reviewers: ["platform-lead"]
      pr_team_reviewers: ["infrastructure-team"]
    # Default settings (fallback when no global or target settings)
    defaults:
      branch_prefix: "chore/sync-files"
      pr_labels: ["maintenance"]
      pr_assignees: ["maintainer1", "maintainer2"]
      pr_reviewers: ["reviewer1", "reviewer2"]
      pr_team_reviewers: ["platform-team"]
    targets:
      - repo: "org/target-repo"
        branch: "main"                        # Target branch for PRs (defaults to repo's default branch)
        files:
          - src: ".github/workflows/ci.yml"
            dest: ".github/workflows/ci.yml"
        directories:
          - src: ".github/actions"
            dest: ".github/actions"
            exclude: ["*.out", "go-coverage"]
        transform:
          repo_name: true
          variables:
            ENVIRONMENT: "production"
        # Additional PR settings merged with global settings
        # Final labels: ["automated-sync", "chore", "service-specific"]
        pr_labels: ["service-specific"]
        # Final assignees: ["platform-team", "service-owner"]
        pr_assignees: ["service-owner"]
        # Final reviewers: ["platform-lead", "service-reviewer"]
        pr_reviewers: ["service-reviewer"]

📋 Reusable File & Directory Lists

Define reusable file and directory lists to reduce configuration repetition when syncing the same files to multiple repositories.

version: 1

# Define reusable file lists
file_lists:
  - id: "common-github-files"
    name: "Common GitHub Files"
    description: "Standard GitHub configuration files"
    files:
      - src: ".github/CODE_OF_CONDUCT.md"
        dest: ".github/CODE_OF_CONDUCT.md"
      - src: ".github/SECURITY.md"
        dest: ".github/SECURITY.md"
      - src: ".github/SUPPORT.md"
        dest: ".github/SUPPORT.md"

  - id: "editor-config"
    name: "Editor Configuration"
    description: "Editor and code formatting files"
    files:
      - src: ".editorconfig"
        dest: ".editorconfig"
      - src: ".gitattributes"
        dest: ".gitattributes"

# Define reusable directory lists
directory_lists:
  - id: "github-workflows"
    name: "GitHub Actions Workflows"
    description: "Standard CI/CD workflows"
    directories:
      - src: ".github/workflows"
        dest: ".github/workflows"
        exclude: ["*.tmp", "*.local"]

groups:
  - name: "standard-sync"
    id: "standard-sync"
    source:
      repo: "org/template-repo"
      branch: "master"
    targets:
      # Use lists for multiple repos
      - repo: "org/service-a"
        file_list_refs: ["common-github-files", "editor-config"]
        directory_list_refs: ["github-workflows"]
        # Can still add inline files
        files:
          - src: "LICENSE"
            dest: "LICENSE"

      - repo: "org/service-b"
        file_list_refs: ["common-github-files"]
        directory_list_refs: ["github-workflows"]

Benefits:

Define file/directory lists once, use many times
Easy updates - change lists in one place
Mix references with inline files/directories
Clear organization and reduced YAML duplication

❌ Cancel Sync Operations

When issues arise, you can cancel active sync operations to prevent unwanted changes. Group filtering makes cancellation much faster for multi-group configurations.

Cancel sync operations when issues arise:

# Cancel all active syncs (closes PRs and deletes branches)
go-broadcast cancel --config sync.yaml

# Cancel syncs for specific repositories only
go-broadcast cancel company/service1 company/service2

# Cancel syncs for specific groups (much faster for multi-group configs!)
go-broadcast cancel --groups "core"
go-broadcast cancel --groups "core,security"

# Cancel specific repository in a specific group
go-broadcast cancel --groups "third-party-libraries" company/repo1

# Cancel all except experimental group
go-broadcast cancel --skip-groups "experimental"

# Preview what would be cancelled without making changes
go-broadcast cancel --dry-run --config sync.yaml

# Close PRs but keep sync branches for later cleanup
go-broadcast cancel --keep-branches --config sync.yaml

# Add custom comment when closing PRs
go-broadcast cancel --comment "Cancelling due to template update" --config sync.yaml

Performance Benefits:

Without group filtering: Scans all groups in your config (100+ API calls for 5 groups)
With --groups "core": Scans only the core group (20 API calls)
Result: 5x faster cancellation for multi-group configurations

🌐 Global PR Assignment Configuration

The global section allows you to define PR assignments (labels, assignees, reviewers, team reviewers) that are merged with target-specific assignments rather than overridden. This provides powerful control over PR workflows across all repositories.

How It Works

Merge Priority: global + target → defaults (fallback)

Global settings apply to ALL target repositories
Target settings are merged with global settings (duplicates removed)
Default settings are used only when neither global nor target settings exist

Example Configuration

version: 1
groups:
  - name: "Workflow Distribution"
    id: "workflow-dist"
    priority: 1
    enabled: true
    source:
      repo: "org/template-repo"
      branch: "master"
    # Applied to ALL PRs across all targets
    global:
      pr_labels: ["automated-sync", "chore"]
      pr_assignees: ["platform-team"]
      pr_reviewers: ["platform-lead"]
      pr_team_reviewers: ["infrastructure-team"]
    # Fallback settings (used only if no global/target assignments)
    defaults:
      branch_prefix: "chore/sync-files"
      pr_labels: ["maintenance"]
    targets:
      # This repo gets ONLY global settings
      - repo: "org/service-a"
        files:
          - src: ".github/workflows/ci.yml"
            dest: ".github/workflows/ci.yml"
        # Effective PR settings:
        # Labels: ["automated-sync", "chore"]
        # Assignees: ["platform-team"]
        # Reviewers: ["platform-lead"]
        # Team reviewers: ["infrastructure-team"]
      # This repo gets global + target merged
      - repo: "org/service-b"
        files:
          - src: ".github/workflows/ci.yml"
            dest: ".github/workflows/ci.yml"
        pr_labels: ["critical", "service-b"]
        pr_assignees: ["service-b-owner"]
        # Effective PR settings (merged):
        # Labels: ["automated-sync", "chore", "critical", "service-b"]
        # Assignees: ["platform-team", "service-b-owner"]
        # Reviewers: ["platform-lead"] (from global)
        # Team reviewers: ["infrastructure-team"] (from global)

Use Cases

Organization-wide standards: Apply consistent labels and assignees across all repositories
Platform team oversight: Ensure platform team is always assigned to infrastructure changes
Security requirements: Add security team reviewers to all template updates
Compliance labeling: Automatically tag all PRs with audit/compliance labels

🗄️ Database-Backed Configuration

Use SQLite database instead of YAML files for dynamic configuration management, queryable config, and structured storage.

Quick Start:

# Initialize database
go-broadcast db init

# Import existing YAML configuration
go-broadcast db import sync.yaml

# Use database for all operations
go-broadcast sync --from-db
go-broadcast status --from-db --json
go-broadcast validate --from-db
go-broadcast cancel --from-db --groups "bitcoin-schema"

Query your configuration:

# Which repos sync this file?
go-broadcast db query --file .github/workflows/ci.yml

# What files sync to this repo?
go-broadcast db query --repo company/service-name

# Which targets use this file list?
go-broadcast db query --file-list ai-files

Export back to YAML:

# Export entire configuration
go-broadcast db export --output backup.yaml

# Export specific group
go-broadcast db export --group core --output core-group.yaml

Benefits:

Queryable: Answer "which repos sync this file?" instantly
Structured: SQLite schema with full validation
Backwards compatible: Import/export YAML anytime
Works everywhere: --from-db flag available on all commands
Transaction safety: All-or-nothing imports with rollback

See the complete Database Documentation for schema reference, CLI commands, and migration guide.

📚 Documentation

Quick Start – Get up and running in 5 minutes with the Quick Start guide
Configuration Guide – Complete guide to group-based configuration at docs/configuration-guide.md
Database Backend – Structured configuration storage with SQLite at docs/database.md
Repository Analytics – Track repo metrics and security alerts across organizations at docs/database.md
Module-Aware Sync – Smart module versioning and synchronization at docs/module-sync.md
Group Examples – Practical configuration patterns at docs/group-examples.md
Usage Examples – Real-world scenarios in the Usage Examples section
Directory Sync Guide – Complete guide to directory synchronization at docs/directory-sync.md
Configuration Examples – Browse practical patterns in the examples directory
Troubleshooting – Solve common issues with the troubleshooting guide
API Reference – Dive into the godocs at pkg.go.dev/github.com/mrz1836/go-broadcast
Integration Tests – End-to-end testing examples in test/integration
Internal Utilities – Shared testing and validation utilities in internal packages
Performance – Check the latest numbers in the Performance section
Repository Features – Full list of built-in CI/CD, security, and DX features at .github/docs/repository-features.md
GitHub Workflows – Workflow descriptions and the control center at .github/docs/workflows.md

🤖 AI-Powered Text Generation (Optional)

go-broadcast can optionally use AI to generate intelligent PR descriptions and commit messages based on diff analysis.

Quick Setup:

export GO_BROADCAST_AI_ENABLED=true
export ANTHROPIC_API_KEY=sk-ant-...

What Gets Generated:

Feature	AI Output	Fallback
PR Body	Context-aware description	Static template
Commit Message	Descriptive conventional commit	`sync: update N files`

Supported Providers:

Provider	Env Var	Default Model
Anthropic	`ANTHROPIC_API_KEY`	claude-sonnet-4-5-20250929
OpenAI	`OPENAI_API_KEY`	gpt-5.2
Google	`GEMINI_API_KEY`	gemini-3-pro-preview

Performance Optimizations:

Caching: Identical diffs across repos reuse cached AI responses (SHA256-keyed)
Smart Truncation: Large diffs are intelligently truncated to stay within token limits
Retry Logic: Transient failures are automatically retried with exponential backoff

Granular Control:

GO_BROADCAST_AI_PR_ENABLED=true      # AI for PRs only
GO_BROADCAST_AI_COMMIT_ENABLED=true  # AI for commits only

Important: AI failures never block sync operations - they fall back to static templates silently.

See the modular environment configuration for all AI configuration options.

Repository Features

This repository includes 25+ built-in features covering CI/CD, security, code quality, developer experience, and community tooling.

View the full Repository Features list →

Library Deployment

This project uses goreleaser for streamlined binary and library deployment to GitHub. To get started, install it via:

brew install goreleaser

The release process is defined in the .goreleaser.yml configuration file.

Then create and push a new Git tag using:

magex version:bump push=true bump=patch branch=master

This process ensures consistent, repeatable releases with properly versioned artifacts and citation metadata.

Build Commands

View all build commands

magex help

GitHub Workflows

All workflows are driven by modular configuration in .github/env/ — no YAML editing required.

View all workflows and the control center →

Updating Dependencies

To update all dependencies in go.mod files, run:

# Update all dependencies
magex deps:update

# Update all modules
magex deps:update all-modules

This command ensures all dependencies are brought up to date in a single step, including Go modules and any tools managed by MAGE-X. It is the recommended way to keep your development environment and CI in sync with the latest versions.

To update the environment files with the latest tool versions, run:

# Dry run to preview changes
magex updateToolVersions

# Apply minor/patch updates (major version upgrades are skipped by default)
UPDATE_VERSIONS=true magex updateToolVersions

# Apply all updates including major version upgrades (e.g., v1.x.x to v2.x.x)
UPDATE_VERSIONS=true ALLOW_MAJOR_UPGRADES=true magex updateToolVersions

Pre-commit Hooks

Set up the Go-Pre-commit System to run the same formatting, linting, and tests defined in AGENTS.md before every commit:

# Install and set up pre-commit hooks
go install github.com/mrz1836/go-pre-commit/cmd/go-pre-commit@latest
go-pre-commit install

# Run pre-commit hooks manually
go-pre-commit run --all-files

The system is configured via the modular environment configuration and provides 17x faster execution than traditional Python-based pre-commit hooks. See the complete documentation for details.

Logging and Debugging

go-broadcast provides comprehensive logging capabilities designed for debugging, monitoring, and troubleshooting. The logging system features intuitive verbose flags, component-specific debug modes, and automatic sensitive data redaction.

Quick Start

# Basic logging levels
go-broadcast sync --log-level debug     # Debug level logging
go-broadcast sync --log-level info      # Info level logging (default)
go-broadcast sync --log-level warn      # Warning level logging
go-broadcast sync --log-level error     # Error level logging

# Collect comprehensive diagnostic information
go-broadcast diagnose                    # Display diagnostic info to stdout
go-broadcast diagnose > diagnostics.json # Save diagnostics to file for support

Note: Advanced verbose flags (-v, -vv, -vvv) and component-specific debug flags (--debug-git, --debug-api, etc.) are planned features not yet implemented. The current implementation supports --log-level for basic debugging.

Log Levels

ERROR: Critical failures that prevent operation
WARN: Important issues that don't stop execution
INFO: High-level operation progress (default)
DEBUG: Detailed operation information (--log-level debug)

Advanced Logging Features

Performance Monitoring

All operations are timed automatically. Look for duration_ms in logs:

# Find slow operations
go-broadcast sync --log-format json 2>&1 | \
  jq -r 'select(.duration_ms > 5000) | "\(.operation): \(.duration_ms)ms"'

Security and Compliance

All tokens and secrets are automatically redacted
Audit trail for configuration changes and repository access
No sensitive data is ever logged

Troubleshooting Common Issues

Git Authentication Issues

# Enable debug logging to see git operations
go-broadcast sync --log-level debug

# Common indicators:
# - "Authentication failed" in git output
# - "Permission denied" errors
# - Check GH_TOKEN or GITHUB_TOKEN environment variables

API Rate Limiting

# Monitor operations with debug logging
go-broadcast sync --log-level debug 2>&1 | grep -i "rate"

File Transformation Issues

# Use debug logging to see operation details
go-broadcast sync --log-level debug

# Debug output shows:
# - File operations
# - Configuration processing
# - Error details

State Discovery Problems

# Enable debug logging for repository state information
go-broadcast sync --log-level debug

# Debug output includes:
# - Repository access attempts
# - Branch discovery
# - File discovery process

Log Management

Debug Sessions

# Save debug session
go-broadcast sync --log-level debug 2> debug-$(date +%Y%m%d-%H%M%S).log

# Review debug logs
go-broadcast sync --log-level debug 2>&1 | tee sync-debug.log

Diagnostic Information Collection

The diagnose command collects comprehensive system information for troubleshooting:

# Collect all diagnostic information (JSON format)
go-broadcast diagnose

# Information collected includes:
# - System details (OS, architecture, CPU count, hostname)
# - go-broadcast --version and build information
# - Git and GitHub CLI versions
# - Environment variables (sensitive data automatically redacted)
# - Configuration file status and validation results
# - Timestamp and runtime information

Note: JSON log format (--log-format json) is a planned feature. The diagnose command provides JSON output for system information.

Environment Variables

Variable	Description	Example
`NO_COLOR`	Disable colored output	`1`

Note: Environment variables for log level and format are planned features not yet implemented.

For more detailed information, see the comprehensive logging guide and enhanced troubleshooting guide.

🧪 Examples & Tests

All unit tests and examples run via GitHub Actions and use Go version 1.24.x. View the configuration file.

Run all tests (fast):

magex test

Run all tests with race detector (slower):

magex test:race

⚡ Performance

Enterprise-grade performance - Designed for high-scale repository management with zero-allocation critical paths.

Performance Highlights

Operation	Performance	Memory
Binary Detection	587M+ ops/sec	Zero allocations
Content Comparison	239M+ ops/sec	Zero allocations
Cache Operations	13.5M+ ops/sec	Minimal memory
Batch Processing	23.8M+ ops/sec	Concurrent safe
Directory Sync	32ms/1000 files	Linear scaling
Exclusion Engine	107ns/op	Zero allocations

Quick Benchmarks

Commands for Benchmarking

# Run quick benchmarks (CI default, <5 minutes)
magex bench

# Run heavy benchmarks manually (10-30 minutes)
# Includes worker pools, large datasets, real-world scenarios
mage benchHeavy

# Run all benchmarks (30-60 minutes)
mage benchAll

# Benchmark specific components
go test -bench=. -benchmem ./internal/algorithms
go test -bench=. -benchmem ./internal/cache

# Run heavy benchmarks with custom settings
go test -bench=. -benchmem -tags=bench_heavy -benchtime=1s ./...

# Try the profiling demo
go run ./cmd/profile_demo

Note: Heavy benchmarks (worker pools with 1000+ tasks, large directory syncs, memory efficiency tests) are excluded from CI to prevent timeouts. Use mage benchHeavy for comprehensive performance testing during development.

Complete Benchmark Results & Profiling Tools

Performance Analysis Tools

🔬 100+ Benchmarks covering all major components
📊 CPU & Memory Profiling with detailed analysis
📈 Performance Reports in HTML, JSON, and Markdown
🔍 Goroutine Analysis for concurrency debugging
⚡ Zero-Allocation operations in critical paths

Complete Performance Results

The following benchmarks were run on Apple M1 Max (updated January 2025):

Benchmark	Operations	ns/op	B/op	allocs/op
Core Algorithms
BinaryDetection (Small Text)	5,852,616	204.5	0	0
BinaryDetection (Large Text)	179,217	6,606	0	0
BinaryDetection (Small Binary)	335,143,730	3.6	0	0
BinaryDetection (Large Binary)	587,204,924	2.0	0	0
DiffOptimized (Identical)	239,319,295	5.0	0	0
DiffOptimized (Different)	4,035,818	297.2	240	10
DiffOptimized (Large Similar)	250,452	4,711	5,492	7
BatchProcessor	23,842,558	54.3	25	1
Cache Operations
Cache Set	6,067,380	177.4	48	4
Cache Get (Hit)	11,481,175	103.8	7	1
Cache Get (Miss)	13,565,466	89.4	32	2
Cache GetOrLoad	11,330,936	106.2	16	1
Performance Profiling
CaptureMemStats	58,352	20,476	0	0
CaptureMemoryStats	3,475	302,402	107	4
MeasureOperation	4,032	316,467	107	4

Performance Characteristics

go-broadcast is designed for efficiency:

Binary detection executes 587M+ operations/second with zero allocations for binary files
Content comparison performs 239M+ operations/second for identical files with zero allocations
Cache operations handle 13.5M+ get operations/second with minimal memory usage
Batch processing manages 23.8M+ operations/second for concurrent tasks
Memory profiling captures detailed statistics at 58K+ operations/second
Performance monitoring measures operations at 3K+ captures/second with comprehensive metrics
Zero-allocation paths optimized algorithms avoid memory allocation in critical operations
Concurrent operations sync multiple repositories simultaneously (configurable concurrency)
GitHub API optimization reduces API calls through intelligent state discovery
Memory efficiency most core operations use minimal allocations
Test coverage maintained at >85% across core packages with comprehensive error handling

Performance varies based on GitHub API rate limits, network conditions, and repository sizes.

Profiling Documentation

📚 Complete Performance Guide:

Performance Guide - Complete benchmarking, profiling, and optimization reference

🛠️ Code Standards

Read more about this Go project's code standards.

🤖 AI Usage & Assistant Guidelines

Read the AI Usage & Assistant Guidelines for details on how AI is used in this project and how to interact with AI assistants.

👥 Maintainers


MrZ

🤝 Contributing

View the contributing guidelines and please follow the code of conduct.

How can I help?

All kinds of contributions are welcome 🙌! The most basic way to show your support is to star 🌟 the project, or to raise issues 💬. You can also support this project by becoming a sponsor on GitHub 👏 or by making a bitcoin donation to ensure this journey continues indefinitely! 🚀

Name		Name	Last commit message	Last commit date
Latest commit History 1,511 Commits
.github		.github
.vscode		.vscode
cmd		cmd
docs		docs
examples		examples
internal		internal
magefiles		magefiles
test		test
.cursorrules		.cursorrules
.devcontainer.json		.devcontainer.json
.dockerignore		.dockerignore
.editorconfig		.editorconfig
.gitattributes		.gitattributes
.gitignore		.gitignore
.gitpod.yml		.gitpod.yml
.golangci.json		.golangci.json
.goreleaser-library.yml		.goreleaser-library.yml
.goreleaser.yml		.goreleaser.yml
.mage.yaml		.mage.yaml
LICENSE		LICENSE
README.md		README.md
codecov.yml		codecov.yml
go.mod		go.mod
go.sum		go.sum

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📡 go-broadcast

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Prerequisites

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Install MAGE-X build tool

✨ Key Features

🚀 Core Synchronization Engine

⚡ Enterprise Performance

🎯 Intelligent Configuration

🗄️ Database Backend

🔄 Advanced Transformations

🤖 Automation & CI/CD

📊 Developer Experience

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🎨 Smart Defaults & Exclusions

🔍 How It Works

State Tracking Through Branch Names

How go-broadcast Determines What to Sync

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🧪 Examples & Tests

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