From 347be7cf3626da2bee6487ef25b2d9dc66988a43 Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Thu, 16 Jul 2020 17:10:59 -0700
Subject: [PATCH] Simple command-line interface

---
 Changelog    |  2 ++
 git_cache.py | 14 ++++++++++++++
 setup.py     |  1 +
 3 files changed, 17 insertions(+)

diff --git a/Changelog b/Changelog
index bfacb4c..0021bf3 100644
--- a/Changelog
+++ b/Changelog
@@ -1,4 +1,6 @@
 ## [Unreleased]
+### Added
+- Command line interface
 
 ## [1.0.0] - 2020-07-10
 Initial release
diff --git a/git_cache.py b/git_cache.py
index d1923cd..594fb8a 100644
--- a/git_cache.py
+++ b/git_cache.py
@@ -8,6 +8,7 @@ import hashlib
 import logging
 import os
 import subprocess
+import sys
 
 from typing import Tuple
 
@@ -77,3 +78,16 @@ def ensure_rev_available(repo: Repo, ref: Ref, rev: Rev) -> Path:
     subprocess.run(['git', '-C', cachedir, 'cat-file', '-e', rev], check=True)
 
     return cachedir
+
+
+def _main() -> None:
+    if len(sys.argv) == 3:
+        print('{1} {0}'.format(*fetch(Repo(sys.argv[1]), Ref(sys.argv[2]))))
+    elif len(sys.argv) == 4:
+        print(ensure_rev_available(
+            Repo(sys.argv[1]), Ref(sys.argv[2]), Rev(sys.argv[3])))
+    else:
+        usage = '''usage: git-cache repo ref [rev]
+example: git-cache https://github.com/NixOS/nixpkgs.git master'''
+        print(usage, file=sys.stderr)
+        sys.exit(1)
diff --git a/setup.py b/setup.py
index b7bbbf1..8f5d1b2 100644
--- a/setup.py
+++ b/setup.py
@@ -3,5 +3,6 @@ from setuptools import setup
 setup(
     name="git_cache",
     version="0.0.1-pre",
+    entry_points={'console_scripts': ['git-cache = git_cache:_main']},
     py_modules=['git_cache'],
 )
-- 
2.44.1