A simple project to get information from the git repository of your project
MIT License
A very simple project to get information from the git repository of your project. This package does not have any dependencies; it reads directly the data from the .git repository.
Just do a pip install python-git-info
. This project should work with both python 2.7 and 3.x.
This app will search the current directory for a .git
directory (which is
always contained inside the root directory of a project). If one is found
it will be used; else it will search the parent directory recursively until a
.git
is found.
There's a single function name get_git_info()
with an optional dir
parameter.
If you leave it empty it will start the .git
directory search from the current directory,
if you provide a value for dir
it will start from that directory. The get_git_info
will return a dictionary with the following structure if everything works ok or
None
if something fishy happend or no .git
folder was found:
>> import gitinfo
>> gitinfo.get_git_info()
{
'parent_commit': 'd54743b6e7cf9dc36354fe2907f2f415b9988198',
'message': 'commit: Small restructuring\n',
'commiter': 'Serafeim <[email protected]>',
'commit_date': '2018-11-14 13:52:34',
'author': 'Serafeim <[email protected]>',
'author_date': '2018-11-14 13:52:34',
'commit': '9e1eec364ad24df153ca36d1da8405bb6379e03b',
'refs': 'master'
}
You can also use it directly from the command line, f.e to get the info from the current directory: python -c "import gitinfo; print(gitinfo.get_git_info())"
.
You can even do some funny stuff with jq if you convert that struct to json:
python -c "import gitinfo, json; print(json.dumps(gitinfo.get_git_info()))" | jq .commit
"92c76134aa108de6fcd39462ed2c9bc72fad4d01"
Notice that refs
is the current branch.
This project will return the info from the latest commit of your current branch. To do this, it will read the .git/HEAD
file which contains your current branch (i.e something like ref: refs/heads/master
). It will then read the file it found there (i.e .git/refs/heads/master
) to retrieve the actual sha of the latest commit, something like 8f6223c849d4bba75f037aeeb8660d9e6e306862
.
This object is located in.git/objects/8f/6223c849d4bba75f037aeeb8660d9e6e306862
(notice
the first two characters are a directory name and the rest is the actual filename). This
is a zlib compressed folder. After it is uncompressed it has a simple format; I'm
copying from the git internals manual:
The format for a commit object is simple: it specifies the top-level tree for the snapshot of the project at that point; the parent commits if any (the commit object described above does not have any parents); the author/committer information (which uses your user.name and user.email configuration settings and a timestamp); a blank line, and then the commit message.
So a sample commit message file would be something like this:
tree fa077d18fe3309aa12791dad2f733bfbb50fdee6
parent 943f6e8e3641ea38a9d9db3256944b46bcfc1f77
author Serafeim Papastefanos <[email protected]> 1562836041 +0300
committer Serafeim Papastefanos <[email protected]> 1562836041 +0300
prep new ver
Until now everything seems like sunshine; unfortunately there's a can of snakes in this process or better a pack
of snakes: Non trivial git repositories will
compress the contents of their .git/objects
folder to save network (and disk) space to a file ending with .pack
. This file is a dump of all the (zlib compressed)
object your repository contains (including the commit messages of course) and is accompanied by a .idx
object which says where each object can be found in the
pack file. You can find these files in .git/objects/pack
folder (if your repository has them of course).
In any case, the process of reading the .idx
file to find the index of your commit and then reading that from the .pack
file is not trivial; if you want
to learn more about it you can check out this excellent resource: https://codewords.recurse.com/issues/three/unpacking-git-packfiles
Or you can take a look at my code at the pack_reader
module which I tried to heavily comment to improve understanding.
This project may seem useless or very useful, depending on the way you deploy to your servers. If you, like me, push every changeset to your VCS before deploying and then pull the changes from the remote server to actually deploy then you'll find this project priceless: You can easily add the latest commit information to somewhere in your web application so you'll be able to see immediately which changeset is deployed to each server without the need to actually login to the server and do a git log
.
Also it is important to add here that this project is pure python and does not have
any external dependencies (not even git
); making it very easy to install and
use in any project.
0.8.3
0.8.2
0.8.1
0.8.0
0.7.6
0.7.5
refs
0.7.4
0.7.3
0.7.2
0.7.1
0.7
0.6.1
0.6
0.5
.git/logs
to parse the real commit object inside the .git/objects
folder.0.4
0.3
0.2