Check dependencies

Author: q0w

src/pip/_internal/operations/check.py

@@ -71,6 +71,9 @@ def check_package_set(
         for req in package_detail.dependencies:
             name = canonicalize_name(req.name)
 
+            if should_ignore and should_ignore(name):
+                continue
+
             # Check if it's missing
             if name not in package_set:
                 missed = True

tests/functional/test_check.py

@@ -323,7 +323,7 @@ def test_check_ignore_packages(script: PipTestEnvironment) -> None:
     result = script.pip("install", "--no-index", package_a_path, "--no-deps")
     assert "Successfully installed package-A-1.0" in result.stdout, str(result)
 
-    result = script.pip("check", "--ignore-packages=package-a")
+    result = script.pip("check", "--ignore-packages=missing")
     expected_lines = ("No broken requirements found.",)
     assert matches_expected_lines(result.stdout, expected_lines)
     assert result.returncode == 0