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+# GitLib
+
+The `gitapi.py` is an API for OgGit, written in Python/Flask.
+
+It is an HTTP server that receives commands and executes maintenance actions including the creation and deletion of repositories.
+
+
+# Installing Python dependencies
+
+The conversion of the code to Python 3 currently requires the packages specified in `requirements.txt`.
+
+To install Python dependencies, the `venv` module is used (https://docs.python.org/3/library/venv.html), which installs all dependencies in an environment independent of the system.
+
+
+# Usage
+
+
+## Older Distributions (18.04)
+
+    sudo apt install -y python3.8 python3.8-venv python3-venv libarchive-dev
+    python3.8 -m venv venvog
+    . venvog/bin/activate
+    python3.8 -m pip install --upgrade pip
+    pip3 install -r requirements.txt
+
+Run with:
+
+    ./gitapi.py
+
+
+## Usage
+
+**Note:** Run as `opengnsys`, as it manages the images located in `/opt/opengnsys/images`.
+
+    $ . venvog/bin/activate
+    $ ./gitapi.py
+
+
+# Documentation
+
+Python documentation can be generated using a utility like pdoc3 (there are multiple possible alternatives):
+
+    # Install pdoc3
+    pip install --user pdoc3
+
+    # Generate documentation
+    pdoc3 --force --html opengnsys_git_installer.py
+
+# Operation
+
+## Requirements
+
+The gitapi is designed to run within an existing opengnsys environment. It should be installed in an ogrepository.
+
+## API Example
+
+### Get list of branches
+
+    $ curl -L http://localhost:5000/repositories/linux/branches
+    {
+        "branches": [
+            "master" 
+        ]
+    }
+
+### Synchronize with remote repository
+
+    curl --header "Content-Type: application/json" --data  '{"remote_repository":"foobar"}' -X POST -L http://localhost:5000/repositories/linux/sync