gg-stack-0.1.0 is not a library.

git-gud (gg)

A stacked-diffs CLI tool for GitHub and GitLab, inspired by Gerrit, Phabricator/Arcanist, and Graphite.

[!CAUTION] This tool has been vibe coded for myself and hasn't been battle tested yet. Do not use! You might bork your git repository!

What are Stacked Diffs?

Stacked diffs allow you to break large changes into small, reviewable commits that build on each other. Each commit becomes its own Pull Request (GitHub) or Merge Request (GitLab), with proper dependency chains. This enables:

Faster reviews - Small, focused changes are easier to review
Parallel work - Start the next feature while waiting for review
Clean history - Each commit is a logical unit of change

Installation

From source

cargo install --path .

From crates.io

cargo install gg-stack

Prerequisites

Git 2.x+
For GitHub repositories: gh - GitHub CLI
For GitLab repositories: glab - GitLab CLI

git-gud automatically detects your remote provider and uses the appropriate CLI tool.

Authenticate with your provider before using git-gud:

# For GitHub
gh auth login

# For GitLab
glab auth login

Quick Start

# Create a new stack
gg co my-feature

# Make changes and commit (normal git workflow)
git add . && git commit -m "Add data model"
git add . && git commit -m "Add API endpoint"
git add . && git commit -m "Add UI component"

# View your stack
gg ls

# Sync with remote (creates PRs/MRs)
gg sync --draft

# Navigate within the stack
gg first          # Go to first commit
gg next           # Go to next commit
gg prev           # Go to previous commit
gg last           # Return to stack head

# After review feedback, modify a commit
gg mv 1           # Move to commit 1
# make changes...
gg sc             # Squash changes into current commit

# Land approved PRs/MRs
gg land --all

# Clean up merged stacks
gg clean

Commands

Stack Management

Command	Description
`gg co <name>`	Create a new stack, switch to existing, or checkout from remote
`gg ls`	List current stack commits with PR/MR status
`gg ls --all`	List all stacks in the repository
`gg ls --remote`	List remote stacks not checked out locally
`gg clean`	Remove merged stacks and their remote branches

Syncing

Command	Description
`gg sync`	Push all commits and create/update PRs/MRs
`gg sync --draft`	Create new PRs/MRs as drafts
`gg sync --force`	Force push even if remote diverged

Navigation

Command	Description
`gg first`	Move to the first commit in the stack
`gg last`	Move to the last commit (stack head)
`gg prev`	Move to the previous commit
`gg next`	Move to the next commit
`gg mv <target>`	Move to a specific commit (by position, GG-ID, or SHA)

Editing

Command	Description
`gg sc`	Squash staged changes into current commit
`gg sc --all`	Squash all changes (staged + unstaged)
`gg reorder`	Reorder commits interactively
`gg absorb`	Auto-distribute changes to appropriate commits

Landing

Command	Description
`gg land`	Merge the first approved PR/MR (squash by default)
`gg land --all`	Merge all approved PRs/MRs in sequence
`gg land --wait`	Wait for CI to pass and approvals before merging
`gg land --all --wait`	Wait and merge all PRs/MRs in sequence
`gg land --no-squash`	Merge using merge commit instead of squash
`gg land --clean`	Automatically clean up stack after landing all PRs/MRs
`gg land --no-clean`	Disable automatic cleanup (overrides config default)
`gg rebase`	Rebase stack onto updated base branch

Notes:

The --wait flag polls for CI status and approvals with a configurable timeout (default: 30 minutes). Configure with land_wait_timeout_minutes in .git/gg/config.json.
The --clean and --no-clean flags control automatic stack cleanup after landing all PRs/MRs. If neither is specified, the behavior is controlled by the land_auto_clean config option (default: false). Use --clean to enable cleanup for a single command, or --no-clean to override a true config default.

Utilities

Command	Description
`gg setup`	Generate or update `.git/gg/config.json` interactively
`gg lint`	Run lint commands on each commit
`gg continue`	Continue after resolving conflicts
`gg abort`	Abort current operation
`gg completions <shell>`	Generate shell completions

Configuration

Configuration is stored in .git/gg/config.json. Run gg setup to generate it interactively:

{
  "defaults": {
    "base": "main",
    "branch_username": "your-username",
    "lint": [
      "cargo fmt --check",
      "cargo clippy -- -D warnings"
    ]
  },
  "stacks": {
    "my-feature": {
      "base": "main",
      "mrs": {
        "c-abc1234": 123,
        "c-def5678": 124
      }
    }
  }
}

Configuration Options

All configuration options are in the defaults section:

Option	Type	Description	Default
`base`	`string`	Default base branch for new stacks	Auto-detect (main/master/trunk)
`branch_username`	`string`	Username prefix for branch naming	Auto-detect via `gh whoami`/`glab whoami`
`lint`	`array`	Lint commands to run on each commit with `gg lint`	`[]`
`auto_add_gg_ids`	`boolean`	Automatically add GG-IDs to commits without prompting	`true`
`land_wait_timeout_minutes`	`number`	Timeout in minutes for `gg land --wait`	`30`
`land_auto_clean`	`boolean`	Automatically clean up stack after landing all PRs/MRs	`false`

Example configuration:

{
  "defaults": {
    "base": "main",
    "branch_username": "nacho",
    "lint": [
      "cargo fmt --check",
      "cargo clippy -- -D warnings"
    ],
    "auto_add_gg_ids": true,
    "land_wait_timeout_minutes": 60,
    "land_auto_clean": true
  }
}

How It Works

Branch Naming

Stack branch: <username>/<stack-name> (e.g., nacho/my-feature)
Per-commit branches: <username>/<stack-name>--<entry-id> (e.g., nacho/my-feature--c-abc1234)

GG-ID Trailers

Each commit gets a stable GG-ID trailer that persists across rebases:

Add user authentication

Implement JWT-based auth with refresh tokens.

GG-ID: c-abc1234

This ID is used to track which PR/MR corresponds to which commit, even after reordering or amending.

PR/MR Dependencies

PRs/MRs are created with proper target branches:

First commit targets the base branch (e.g., main)
Subsequent commits target the previous commit's branch

This creates a chain of dependent PRs/MRs that can be reviewed and merged in order.

Example Workflow

# 1. Start a new feature
$ gg co user-auth
OK Created stack "user-auth" based on main

# 2. Develop incrementally
$ git add . && git commit -m "Add user model"
$ git add . && git commit -m "Add auth endpoints"
$ git add . && git commit -m "Add login UI"

# 3. Check your stack
$ gg ls
user-auth (3 commits, 0 synced)
  [1] abc1234 Add user model      (id: c-f9a1e2b) (not pushed)
  [2] def5678 Add auth endpoints  (id: c-7c1b9d0) (not pushed)
  [3] ghi9012 Add login UI        (id: c-98ab321) (not pushed) <- HEAD

# 4. Push to remote
$ gg sync --draft
OK Pushed nacho/user-auth--c-f9a1e2b -> MR !101 (draft)
   https://gitlab.com/user/repo/-/merge_requests/101
OK Pushed nacho/user-auth--c-7c1b9d0 -> MR !102 (draft)
   https://gitlab.com/user/repo/-/merge_requests/102
OK Pushed nacho/user-auth--c-98ab321 -> MR !103 (draft)
   https://gitlab.com/user/repo/-/merge_requests/103

# 5. Address review feedback on commit 1
$ gg mv 1
OK Moved to: [1] abc1234 Add user model

$ # make changes...
$ gg sc
OK Squashed into abc1234
OK Rebased 2 commits on top

# 6. Re-sync
$ gg sync
OK Force-pushed nacho/user-auth--c-f9a1e2b
OK Force-pushed nacho/user-auth--c-7c1b9d0
OK Force-pushed nacho/user-auth--c-98ab321

# 7. Land when approved
$ gg land --all
OK Merged MR !101 into main
OK Merged MR !102 into main
OK Merged MR !103 into main

# 8. Clean up
$ gg clean
OK Deleted stack "user-auth" (all merged)

Working with Remote Stacks

You can continue working on stacks from another machine:

# List stacks that exist on remote but not locally
$ gg ls --remote
Remote stacks:
  ○ user-auth (3 commits) [#101, #102, #103]
  ○ api-refactor (2 commits)

# Check out a remote stack
$ gg co user-auth
→ Fetching remote stack user-auth...
OK Checked out remote stack user-auth

# Continue working normally
$ gg ls
$ gg sync

Shell Completions

Generate completions for your shell:

# Bash
gg completions bash > ~/.local/share/bash-completion/completions/gg

# Zsh
gg completions zsh > ~/.zfunc/_gg

# Fish
gg completions fish > ~/.config/fish/completions/gg.fish

Troubleshooting

"gh CLI not installed" / "glab is not installed"

Install the appropriate CLI for your provider:

# GitHub CLI (macOS)
brew install gh

# GitLab CLI (macOS)
brew install glab

# Other platforms
# GitHub: https://cli.github.com/
# GitLab: https://gitlab.com/gitlab-org/cli#installation

"Not authenticated with GitHub/GitLab"

Run the appropriate auth command:

gh auth login    # For GitHub
glab auth login  # For GitLab

"Not on a stack branch"

You're on a branch that doesn't follow the <user>/<stack> naming convention. Use gg co <name> to create or switch to a stack.

"Merge commits are not supported"

Stacks must have linear history. Rebase your branch to remove merge commits:

git rebase main

Contributing

Contributions are welcome! Please see the design document for architecture details.

License

MIT License - see LICENSE for details.

gg-stack 0.1.0