rung

A Git workflow tool for managing stacked PRs (pull request chains).

Overview

Rung helps you work with dependent branches by:

• Tracking branch relationships in a stack
• Syncing child branches when parents are updated
• Managing PR chains on GitHub with automatic stack comments
• Handling merges with automatic descendant rebasing

Installation

Pre-built binaries (recommended)

Download the latest release for your platform from GitHub Releases.

macOS (Apple Silicon):

curl -fsSL https://github.com/auswm85/rung/releases/latest/download/rung-$(curl -s https://api.github.com/repos/auswm85/rung/releases/latest | grep tag_name | cut -d '"' -f 4 | sed 's/v//')-aarch64-apple-darwin.tar.gz | tar xz
sudo mv rung /usr/local/bin/

macOS (Intel):

curl -fsSL https://github.com/auswm85/rung/releases/latest/download/rung-$(curl -s https://api.github.com/repos/auswm85/rung/releases/latest | grep tag_name | cut -d '"' -f 4 | sed 's/v//')-x86_64-apple-darwin.tar.gz | tar xz
sudo mv rung /usr/local/bin/

Linux (x86_64):

curl -fsSL https://github.com/auswm85/rung/releases/latest/download/rung-$(curl -s https://api.github.com/repos/auswm85/rung/releases/latest | grep tag_name | cut -d '"' -f 4 | sed 's/v//')-x86_64-unknown-linux-gnu.tar.gz | tar xz
sudo mv rung /usr/local/bin/

Windows: Download the .zip from releases and add to your PATH.

Homebrew (macOS/Linux)

brew tap auswm85/rung https://github.com/auswm85/rung
brew install rung

From crates.io

cargo install rung-cli

With cargo-binstall (faster, no compilation)

cargo binstall rung-cli

From source

cargo install --path crates/rung-cli

Quick Start

# Initialize rung in a repository
rung init

# Create your first stacked branch
rung create feature/auth

# Make changes, commit, then create another branch on top
rung create feature/auth-tests

# Submit all branches as PRs
rung submit

# View stack status
rung status

Commands

rung init

Initialize rung in the current repository. Creates a .git/rung/ directory to store stack state.

rung init

rung create <name>

Create a new branch with the current branch as its parent. This establishes the branch relationship in the stack.

rung create feature/new-feature

rung status

Display the current stack as a tree view with sync state and PR status.

rung status              # Basic status
rung status --fetch      # Fetch latest PR status from GitHub
rung status --json       # Output as JSON for tooling

Options:

• --fetch - Fetch latest PR status from GitHub
• --json - Output as JSON (for tooling integration)

rung sync

Sync the stack by rebasing all branches when the base moves forward.

rung sync                # Sync all branches
rung sync --dry-run      # Preview what would happen
rung sync --base develop # Sync against a different base branch

If conflicts occur:

# Resolve conflicts, then:
git add .
rung sync --continue

# Or abort and restore:
rung sync --abort

Options:

• --dry-run - Show what would be done without making changes
• --continue - Continue after resolving conflicts
• --abort - Abort and restore from backup
• -b, --base <branch> - Base branch to sync against (default: "main")

rung submit

Push all stack branches and create/update PRs on GitHub. Each PR includes a stack comment showing the branch hierarchy.

rung submit                          # Submit all branches
rung submit --draft                  # Create PRs as drafts
rung submit --force                  # Force push
rung submit --title "My PR title"    # Custom title for current branch

Options:

• --draft - Create PRs as drafts
• --force - Force push even if remote has changes
• -t, --title <title> - Custom PR title for current branch

rung merge

Merge the current branch's PR via GitHub API. Automatically:

• Rebases all descendant branches onto the new base
• Updates PR bases on GitHub
• Removes the branch from the stack
• Deletes local and remote branches
• Pulls latest changes to keep local up to date

rung merge                  # Squash merge (default)
rung merge --method merge   # Regular merge commit
rung merge --method rebase  # Rebase merge
rung merge --no-delete      # Keep remote branch after merge

Options:

• -m, --method <method> - Merge method: squash (default), merge, or rebase
• --no-delete - Don't delete the remote branch after merge

rung undo

Undo the last sync operation, restoring all branches to their previous state.

rung undo

rung nxt

Navigate to the next (child) branch in the stack.

rung nxt

rung prv

Navigate to the previous (parent) branch in the stack.

rung prv

rung doctor

Diagnose issues with the stack and repository. Checks:

• Stack integrity: Branches exist, parents are valid, no circular dependencies
• Git state: Clean working directory, not detached HEAD, no rebase in progress
• Sync state: Branches that need rebasing, sync operations in progress
• GitHub connectivity: Authentication, PR status (open/closed/merged)

rung doctor

Issues are reported with severity (error/warning) and actionable suggestions.

Typical Workflow

# Start on main
git checkout main

# Initialize rung (first time only)
rung init

# Create first feature branch
rung create feature/api-client

# Make changes and commit
git add . && git commit -m "Add API client"

# Create dependent branch
rung create feature/api-tests

# Make more changes
git add . && git commit -m "Add API tests"

# Submit both as PRs
rung submit

# After review, merge from bottom of stack
rung prv                    # Go to parent branch
rung merge                  # Merge PR, rebase children automatically

# Continue with remaining PRs
rung merge                  # Merge the next PR

Stack Comments

When you submit PRs, rung adds a comment to each PR showing the stack hierarchy:

### Stack

- API Tests #124 👈
- API Client #123
- `main`

---
*Managed by [rung](https://github.com/auswm85/rung)*

Configuration

Rung stores its state in .git/rung/:

• stack.json - Branch relationships and PR numbers
• config.json - Repository-specific settings
• backups/ - Sync backup data for undo

Requirements

• Rust 1.85+
• Git 2.x
• GitHub CLI (gh) authenticated, or GITHUB_TOKEN environment variable

Project Structure

crates/
  rung-cli/      # Command-line interface
  rung-core/     # Core logic (stack, sync, state)
  rung-git/      # Git operations wrapper
  rung-github/   # GitHub API client

Development

# Clone and set up git hooks
git clone https://github.com/auswm85/rung
cd rung
git config core.hooksPath .githooks

# Run tests
cargo test

# Run with clippy
cargo clippy

# Build release
cargo build --release

License

MIT