These aren't ready for upstream inclusion, because they do not properly
manage version dependencies, execution environment and so on. These are
just the tools I use in my Own Special Environment :tm: for testing and
debugging.

They've been tested only on Fedora 38 for right now, which means:

Python 3.11.4-1.fc38
pylint 2.17.4-2.fc38
mypy 1.4.0-1.fc38
isort 5.12.0-1.fc38
flake8 5.0.3-2.fc38

"Soon" :tm: I'll move the qapi generator code under the python/
directory to take advantage of the more robust linting infrastructure
there, but that's going to happen after this series. Sorry about that!

Signed-off-by: John Snow <jsnow@redhat.com>
---
 scripts/qapi-lint.sh  | 61 +++++++++++++++++++++++++++++++++++++++++++
 scripts/qapi/Makefile |  5 ++++
 2 files changed, 66 insertions(+)
 create mode 100755 scripts/qapi-lint.sh
 create mode 100644 scripts/qapi/Makefile

diff --git a/scripts/qapi-lint.sh b/scripts/qapi-lint.sh
new file mode 100755
index 00000000000..732716f2444
--- /dev/null
+++ b/scripts/qapi-lint.sh
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+set -e
+
+if [[ -f qapi/.flake8 ]]; then
+    echo "flake8 --config=qapi/.flake8 qapi/"
+    flake8 --config=qapi/.flake8 qapi/
+fi
+if [[ -f qapi/pylintrc ]]; then
+    echo "pylint --rcfile=qapi/pylintrc qapi/"
+    pylint --rcfile=qapi/pylintrc qapi/
+fi
+if [[ -f qapi/mypy.ini ]]; then
+    echo "mypy --config-file=qapi/mypy.ini qapi/"
+    mypy --config-file=qapi/mypy.ini qapi/
+fi
+
+if [[ -f qapi/.isort.cfg ]]; then
+    pushd qapi
+    echo "isort -c ."
+    isort -c .
+    popd
+fi
+
+if [[ -f ../docs/sphinx/qapi-domain.py ]]; then
+    pushd ../docs/sphinx
+
+    echo "mypy --strict qapi-domain.py"
+    mypy --strict qapi-domain.py
+    echo "flake8 qapi-domain.py --max-line-length=99"
+    flake8 qapi-domain.py --max-line-length=99
+    echo "isort qapi-domain.py"
+    isort qapi-domain.py
+    echo "black --check qapi-domain.py"
+    black --check qapi-domain.py
+
+    popd
+fi
+
+if [[ -f ../docs/sphinx/qapidoc.py ]]; then
+    pushd ../docs/sphinx
+
+    echo "pylint --rc-file ../../scripts/qapi/pylintrc qapidoc.py"
+    PYTHONPATH=../scripts/ pylint \
+                         --rc-file ../../scripts/qapi/pylintrc \
+                         qapidoc.py
+    echo "flake8 qapidoc.py --max-line-length=80"
+    flake8 qapidoc.py --max-line-length=80
+    echo "isort qapidoc.py"
+    isort qapidoc.py
+    echo "black --line-length 80 --check qapidoc.py"
+    black --line-length 80 --check qapidoc.py
+
+    popd
+fi
+
+pushd ../build
+make -j13
+make check-qapi-schema
+make docs
+make sphinxdocs
+popd
diff --git a/scripts/qapi/Makefile b/scripts/qapi/Makefile
new file mode 100644
index 00000000000..314e8a5505e
--- /dev/null
+++ b/scripts/qapi/Makefile
@@ -0,0 +1,5 @@
+check:
+	isort -c .
+	flake8 .
+	cd .. && pylint --rcfile=qapi/pylintrc qapi
+	cd .. && mypy -p qapi --config-file=qapi/mypy.ini
-- 
2.45.0