From 042d64cd00a23370dd2fdc06891caf969bdf9782 Mon Sep 17 00:00:00 2001
From: Mark McLoughlin <markmc@redhat.com>
Date: Thu, 14 Mar 2024 17:34:33 +0000
Subject: [PATCH] Pass -vv to pip subprocess

Fixes #12577

This looks like it was an oversight in #9450 - we should pass the
correct verbosity level to build env install subprocesses.

Tested with:

```
rm -rf ~/.cache/pip && rm -f *.whl && pip wheel --no-binary :all: hatchling
```

and all three verbosity levels, before and after this change, giving
the following logs:

```
     33 patched-verbosity0.log
   2549 patched-verbosity1.log
  11938 patched-verbosity2.log
     33 unpatched-verbosity0.log
     99 unpatched-verbosity1.log
   1030 unpatched-verbosity2.log
```

i.e. currently a lot of useful logs are being dropped from these install
subprocesess even with -vvv
---
 news/12577.bugfix.rst          | 1 +
 src/pip/_internal/build_env.py | 3 +++
 2 files changed, 4 insertions(+)
 create mode 100644 news/12577.bugfix.rst

diff --git a/news/12577.bugfix.rst b/news/12577.bugfix.rst
new file mode 100644
index 00000000000..bb359a32ff8
--- /dev/null
+++ b/news/12577.bugfix.rst
@@ -0,0 +1 @@
+Ensure `-vv` gets passed to any ``pip install`` build environment subprocesses.
diff --git a/src/pip/_internal/build_env.py b/src/pip/_internal/build_env.py
index 4f704a3547d..838de86474f 100644
--- a/src/pip/_internal/build_env.py
+++ b/src/pip/_internal/build_env.py
@@ -19,6 +19,7 @@
 from pip._internal.cli.spinners import open_spinner
 from pip._internal.locations import get_platlib, get_purelib, get_scheme
 from pip._internal.metadata import get_default_environment, get_environment
+from pip._internal.utils.logging import VERBOSE
 from pip._internal.utils.subprocess import call_subprocess
 from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
 
@@ -242,6 +243,8 @@ def _install_requirements(
             "--no-warn-script-location",
         ]
         if logger.getEffectiveLevel() <= logging.DEBUG:
+            args.append("-vv")
+        elif logger.getEffectiveLevel() <= VERBOSE:
             args.append("-v")
         for format_control in ("no_binary", "only_binary"):
             formats = getattr(finder.format_control, format_control)