.. _library_git:

git

This library provides access to a git project current branch and latest commit data (e.g. commit hash). Support for using this library on Windows operating-systems is experimental and may or may not work depending on the used Prolog backend.

API documentation

Open the `../../docs/library_index.html#git <../../docs/library_index.html#git>`__ link in a web browser.

Loading

To load all entities in this library, load the loader.lgt file:

::

| ?- logtalk_load(git(loader)).

Testing

To test this library predicates, load the tester.lgt file:

::

| ?- logtalk_load(git(tester)).

Usage

All predicates take as first argument a directory, which should be either a git repository directory or a sub-directory of a git repository directory. The main predicate is commit_log/3. It provides access to the git log command when called with the --oneline -n 1 --pretty=format: options. By passing as second argument the desired format, it returns an atom with the formatted output. For example:

::

| ?- git::commit_log('/Users/pmoura/logtalk3', '%h%n%B', Output), write(Output), nl.

eccaa1a2a Update SVG diagrams

Output = 'eccaa1a2a\nUpdate SVG diagrams\n' yes

See e.g. the official documentation on git log pretty formats for details:

https://git-scm.com/docs/pretty-formats

Convenient predicates are also provided for common used formats such as the commit author and the commit hash. For example:

::

| ?- git::commit_author('/Users/pmoura/Documents/Logtalk/logtalk3', Author).

Author = 'Paulo Moura' yes

| ?- git::commit_hash('/Users/pmoura/Documents/Logtalk/logtalk3', Hash).

Hash = eccaa1a2a9495fef441915bbace84e0a4b0394a2 yes

It's also possible to get the name of the current local branch. For example:

::

| ?- git::branch('/Users/pmoura/Documents/Logtalk/logtalk3', Branch).

Branch = master yes