Add -v, --version flag to display program version info (#82)

Author: paketb0te

Diff for: git_sim/__init__.py

@@ -0,0 +1 @@
+__version__ = "0.2.9"

Diff for: git_sim/__main__.py

@@ -12,6 +12,12 @@
 app = typer.Typer(context_settings={"help_option_names": ["-h", "--help"]})
 
 
+def version_callback(value: bool) -> None:
+    if value:
+        print(f"git-sim version {git_sim.__version__}")
+        raise typer.Exit()
+
+
 @app.callback(no_args_is_help=True)
 def main(
     ctx: typer.Context,
@@ -134,6 +140,13 @@ def main(
         settings.highlight_commit_messages,
         help="Make the displayed commit messages more prominent",
     ),
+    version: bool = typer.Option(
+        False,
+        "--version",
+        "-v",
+        help="Show the version of git-sim and exit.",
+        callback=version_callback,
+    ),
 ):
     import git
     from manim import WHITE, config

Diff for: setup.py

@@ -1,11 +1,13 @@
 import setuptools
 
+from git_sim import __version__
+
 with open("README.md", "r") as fh:
     long_description = fh.read()
 
 setuptools.setup(
     name="git-sim",
-    version="0.2.9",
+    version=__version__,
     author="Jacob Stopak",
     author_email="jacob@initialcommit.io",
     description="Simulate Git commands on your own repos by generating an image (default) or video visualization depicting the command's behavior.",