Fix a regression in the add command (#547)

CHANGELOG.md

@@ -17,6 +17,8 @@ _Unreleased_
 - On Windows the `PATH` is now automatically adjusted on install and uninstall.  This means that
   manually adding the rye folder to the search path is no longer necessary.  #483
 
+- Fixed a regression in 0.18 that caused the `add` command to fail.  #547
+
 <!-- released start -->
 
 ## 0.18.0

rye/src/bootstrap.rs

@@ -35,7 +35,7 @@ pub const SELF_PYTHON_TARGET_VERSION: PythonVersionRequest = PythonVersionReques
     suffix: None,
 };
 
-const SELF_VERSION: u64 = 4;
+const SELF_VERSION: u64 = 5;
 
 const SELF_REQUIREMENTS: &str = r#"
 build==0.10.0
@@ -52,7 +52,7 @@ pyproject_hooks==1.0.0
 requests==2.29.0
 tomli==2.0.1
 twine==4.0.2
-unearth==0.9.0
+unearth==0.12.1
 urllib3==1.26.15
 virtualenv==20.22.0
 "#;

rye/src/cli/add.rs

@@ -29,7 +29,7 @@ sources = json.loads(sys.argv[3])
 pre = len(sys.argv) > 4 and sys.argv[4] == "--pre"
 
 finder = PackageFinder(
-    index_urls=sources["index_urls"],
+    index_urls=[x[0] for x in sources["index_urls"]],
     find_links=sources["find_links"],
     trusted_hosts=sources["trusted_hosts"],
 )