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Published December 25, 2022 Updated February 5, 2023
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Provides a monadic Object API to the Git CLI. This project is also an extraction of work originally implemented within the following projects:

If you are looking for alternatives within this space, you might find the following gems of benefit too:


  • Wraps all Git commands with additional enhancements to improve your working experience.

  • Answers monads so you can pipe commands together for more powerful and complex workflows.



To set up the project, run:



At a high level, this project provides a centralized Object API via a single object: Repository. Example:

git =

git.branch          # Equivalent to `git branch <arguments>`.
git.branch_default  # Answers default branch.
git.branch_name     # Answers current branch.            # Allows you to run any Git command.
git.commits         # Answers commit records.
git.config          # Equivalent to `git config <arguments>`.
git.exist?          # Answers if current directory is a Git repository or not.
git.get             # Equivalent to `git config get`.
git.log             # Equivalent to `git log <arguments>`.
git.origin?         # Answers if repository has an origin or not.
git.set             # Equivalent to `get config set`.
git.tag             # Equivalent to `git tag <arguments>`.
git.tag?            # Answers if local or remote tag exists.
git.tag_create      # Create a new tag.
git.tag_last        # Anwswers last tag created.
git.tag_local?      # Answers if local tag exists?
git.tag_parse       # Parses and answers a tag record.
git.tag_remote?     # Answers if remote tag exists?
git.tagged?         # Answers if the repository has any tags.
git.tags_push       # Pushes local tags to remote git.
git.uncommitted     # Parses a file and answers an unsaved commit message.


Should you want to use individual commands instead of interacting with the Repository object, you can leverage any of the objects in the Commands namespace which — at a minimum — use the Command Pattern. Here are the select commands which are enhanced further:


Handles branches.

branch =

# Answers branch default (via Git `init.defaultBranch` configuration).
branch.default  # Success "main"

# Accepts any argument you'd send to `git branch`. Example: "--list"  # Success "  main\n"

# Answers current branch  # Success "major"


Handles global and local configurations.

config =

# Accepts any argument you'd send to `git config`. Example: "--get", "rebase.abbreviateCommands"  # Success "true\n"

# Answers value for key with support for fallback value or block manipulation.
config.get ""                                     # Success "Brooke Kuhlmann"
config.get "user.unknown", "fallback"                      # Success "fallback"
config.get("user.unknown") { |value| value + "fallback" }  # "fallback"

# Answers true or false if origin is defined.
config.origin?                                             # true

# Sets configuration key and value.
config.set "user.demo", "test"                             # Success "test"


Handles commit history.

log = "--oneline", "-1"  # Success "5e21a9866827 Added documentation\n"

The Log class provides two other methods but they require a more detailed explanation. The first is Log#all which answers an array of commits (records) upon success and accepts the same arguments as given to #call.

commit = log.all

The second, is:

commit log.uncommitted ".git/COMMIT_EDITMSG"

The above will answer a single commit record. This is great for building a commit object from an unsaved commit message. The only disadvantage of this approach is that you will get template commits which are always stripped out by Git when processing a saved commit.


Handles the tagging/versioning of commits.

tag =

# Accepts any argument you'd send to `git tag`.
# Example: "--list"
stdout, stderr, status =

# Answers true or false base on whether local and remote tag exist.
tag.exist? "0.1.0"

# Answers last tag for git.

# Answers if local tag exists.
tag.local? "0.1.0"

# Pushes tags to remote git.

# Answers if remote tag exists.
tag.remote? "0.1.0"

# Answers true or false based on whether repository is tagged.


In order to have access to rich data from the Git client, there are several models available to you.


An instance of Gitt::Commits::Model is what is answered back to when using Gitt::Repository via the #commits or #uncommitted methods. In each case, you’ll either get an array of records, a single record, or a failure depending on the result. Here’s an example of a single record:

# #<struct Gitt::Commits::Model
#  author_date_relative="2 days ago",
#  author_email="",
#  author_name="Demo User",
#  body="Necessary to explain recent changes.\n",
#  body_lines=["Necessary to explain recent changes."],
#  body_paragraphs=["Necessary to explain recent changes."],
#  message="Updated documentation with new functionality\n\nNecessary to explain recent changes.\n",
#  sha="5e21a9866827bf5c68bd445ea01b3837a3936b45",
#  subject="Updated documentation with new functionality",
#  trailers=[],
#  trailers_index=nil>

You get a Struct with the following attributes:

  • author_date_relative: Stores the relative date of when the commit was made.

  • author_email: Stores the author email.

  • author_name: Stores the author name.

  • body: Stores the commit body which excludes the subject and leading space.

  • body_lines: Stores each line of the body in an array.

  • body_paragraphs: Stores each paragraph of the body as an array (i.e. broken by double new lines).

  • message: Stores the entire, raw, commit message (i.e. subject and body).

  • sha: Stores the commit SHA.

  • subject: Stores the commit subject.

  • trailers: Stores any commit trailers as an array of GtiPlus::Trailers::Model records.

  • trailers_index: Stores the starting index of trailers within the commit message.


An instance of Gitt::Tags::Model is what is answered back to when using Gitt::Repository via the #tag_parse method. Here’s an example:

# #<struct Gitt::Tags::Model
#  author_date="Tue Dec 29 17:33:01 2020 -0700",
#  author_email="",
#  author_name="Demo User",
#  body="- Added gem skeleton\n- Added RSpec dependnecy",
#  sha="d041d07c29f97b5b06b3b2fd05fa1dd018c7da7c",
#  subject="Version 0.1.0",
#  version="0.1.0">

You get a Struct with the following attributes:

  • author_date: Stores author creation date.

  • author_email: Stores author email.

  • author_name: Store author name.

  • body: Stores body of tag which can be sentences, multiple paragraphs, and/or signature information.

  • sha: Stores the commit SHA for which this tag labels

  • subject: Stores the subject.

  • version: Stores the version.


A trailer is nested within a commit record when trailer information exists. Example:

#<struct Gitt::Commits::Trailers::Model key="Issue", delimiter=":", space=" ", value="123">

The attributes break down as follows:

  • key: Answers the key.

  • delimiter: Answers the delimiter which must be a colon but can be missing if invalid.

  • space: Answers either a space or an empty string with the former being invalid.

  • value: Answers the value associated with the key.


To contribute, run:

git clone
cd gitt

You can also use the IRB console for direct access to all objects:



To test, run: