From: Lily Foote <code@lilyf.org>
Date: Thu, 11 Aug 2022 14:22:08 +0000 (+0100)
Subject: Improve the PackageLoader error message
X-Git-Tag: 3.1.5~10^2~1
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=f54fa113d38230cd7a8e8de1a8ced0f24e344a4e;p=thirdparty%2Fjinja.git

Improve the PackageLoader error message

This exception is raised when the `package_path` directory (default "templates") is not
found, so explain this.
---

diff --git a/src/jinja2/loaders.py b/src/jinja2/loaders.py
index 35799584..0cdeca14 100644
--- a/src/jinja2/loaders.py
+++ b/src/jinja2/loaders.py
@@ -353,8 +353,8 @@ class PackageLoader(BaseLoader):
 
         if template_root is None:
             raise ValueError(
-                f"The {package_name!r} package was not installed in a"
-                " way that PackageLoader understands."
+                f"PackageLoader could not find a '{package_path}' directory for the "
+                f"{package_name!r} package."
             )
 
         self._template_root = template_root