Use Git commit to determine page date
======================================
If your blog content is versioned via Git, this plugin will set articles'
and pages' ``metadata['date']`` to correspond to that of the Git commit.
This plugin depends on the ``gitpython`` python package, which can be
installed via::
pip install gitpython
The date is determined via the following logic:
* if a file is not tracked by Git, or a file is staged but never committed
- metadata['date'] = filesystem time
- metadata['modified'] = filesystem time
* if a file is tracked, but no changes in staging area or working directory
- metadata['date'] = first commit time
- metadata['modified'] = last commit time
* if a file is tracked, and has changes in stage area or working directory
- metadata['date'] = first commit time
- metadata['modified'] = filesystem time
When this module is enabled, ``date`` and ``modified`` will be determined
by Git status; no need to manually set in article/page metadata. And
operations like copy and move will not affect the generated results.
If you don't want a given article or page to use the Git time, set the
metadata to ``gittime: off`` to disable it.
You can also set ``GIT_FILETIME_FOLLOW`` to ``True`` in your settings to
make the plugin follow file renames — i.e., ensure the creation date matches
the original file creation date, not the date it was renamed.
FAQ
---
### Q. I get a GitCommandError: 'git rev-list ...' when I run the plugin. Why?
Be sure to use the correct gitpython module for your distro's Git binary.
Using the ``GIT_FILETIME_FOLLOW`` option to ``True`` may also make your
problem go away, as that optino uses a different method to find commits.
Some notes on Git
~~~~~~~~~~~~~~~~~~
* How to check if a file is managed by Git?
.. code-block:: sh
git ls-files $file --error-unmatch
* How to check if a file has changes?
.. code-block:: sh
git diff $file # compare staging area with working directory
git diff --cached $file # compare HEAD with staged area
git diff HEAD $file # compare HEAD with working directory
* How to get commits related to a file?
.. code-block:: sh
git status $file
With ``gitpython`` package, it's easier to parse committed time:
.. code-block:: python
repo = Git.repo('/path/to/repo')
commits = repo.commits(path='path/to/file')
commits[-1].committed_date # oldest commit time
commits[0].committed_date # latest commit time