From 1fa733ea2ff09dec5ecc4cd229e09b5fc17d243c Mon Sep 17 00:00:00 2001
From: M Bussonnier <bussonniermatthias@gmail.com>
Date: Mon, 3 Jun 2024 11:13:00 -0700
Subject: [PATCH] Add ability to lookup via CLI.

    python -m intersphinx_registry.lookup [package names]

Not direction -m intersphinx_registry in case we want to add
functionalities later.
---
 intersphinx_registry/__init__.py |  2 ++
 intersphinx_registry/lookup.py   | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 intersphinx_registry/lookup.py

diff --git a/intersphinx_registry/__init__.py b/intersphinx_registry/__init__.py
index c51500c..c5037b7 100644
--- a/intersphinx_registry/__init__.py
+++ b/intersphinx_registry/__init__.py
@@ -4,6 +4,8 @@
 
 from __future__ import annotations
 
+import sys
+
 from pathlib import Path
 import json
 from typing import Dict, Tuple, Set, Optional, cast
diff --git a/intersphinx_registry/lookup.py b/intersphinx_registry/lookup.py
new file mode 100644
index 0000000..ea889f7
--- /dev/null
+++ b/intersphinx_registry/lookup.py
@@ -0,0 +1,20 @@
+import sys
+
+from intersphinx_registry import get_intersphinx_mapping
+from sphinx.ext.intersphinx import inspect_main
+
+if len(sys.argv) < 2:
+    sys.exit("Usage: python -m intersphinx_registry.lookup [packages...]")
+
+packages = sys.argv[1:]
+
+urls = [
+    u[0] + (u[1] if u[1] else "objects.inv")
+    for u in get_intersphinx_mapping(packages=packages).values()
+]
+
+
+import logging as _logging
+
+_logging.basicConfig()
+raise SystemExit(inspect_main(urls))