[PATCH v4 2/4] [DO-NOT-MERGE]: Add some ad-hoc linting helpers.

[John Snow <jsnow@redhat.com>]

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 37 for right now, which means:

Python 3.11.1
pylint 2.14.4-3.fc37
mypy 0.982-1.fc37
isort 5.10.1-5.fc37
flake8 5.0.3-1.fc37

The python packaging work does a more exhaustive treatment and
exploration of minimum (and maximum) package requirements; the hope is
that eventually these two series will converge and these dependencies
will all be handled by configuration in qemu.git/python/.

For now, this is just a baseline under one environment to give us some
guidance.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 scripts/qapi-lint.sh  | 29 +++++++++++++++++++++++++++++
 scripts/qapi/Makefile |  5 +++++
 2 files changed, 34 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..2c2f2808ca6
--- /dev/null
+++ b/scripts/qapi-lint.sh
@@ -0,0 +1,29 @@
+#!/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
+
+pushd ../bin/git
+make -j9
+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
-- 
2.39.0