Add python configs for consistency between IDE and CI

Also adds settings to .vscode/settings.json to use the correct
formatter and type checking settings out of the box.

VSCode uses pyright and health-check uses mypy. They do not always
agree unfortunately, mypy  is a little more lenient.
Unfortunately pyright is hard to get working with our scripts that
have no file extension.

BUG=b:242605601
TEST=./tools/health-check

Change-Id: Iaef4ac6f61613e7dda409d5e717102ea9adefe82
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3833699
Commit-Queue: Dennis Kempin <denniskempin@google.com>
Tested-by: Dennis Kempin <denniskempin@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>

.gitignore

@@ -6,5 +6,6 @@ target/
 **/*.pyc
 lcov.info
 .idea
-.vscode
 .envrc
+.vscode/*
+!.vscode/settings.json

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    // Python
+    "python.formatting.provider": "black",
+    "python.analysis.typeCheckingMode": "strict"
+}

mypy.ini

@@ -0,0 +1,3 @@
+[mypy]
+python_version = 3.9
+mypy_path = tools

pyproject.toml

@@ -0,0 +1,11 @@
+[tool.black]
+line-length = 100
+
+[tool.pyright]
+include = ["tools"]
+exclude = ["target"]
+ignore = ["infra", "tools/windows", "tools/contrib"]
+pythonVersion = "3.9"
+pythonPlatform  = "Linux"
+typeCheckingMode = "strict"
+

tools/health-check

@@ -18,12 +18,12 @@ def check_python_tests(context: CheckContext):
 
 def check_python_types(context: CheckContext):
     "Run mypy on all python files to type-check."
-    mypy = cmd("mypy --pretty --color-output").env("MYPY_FORCE_COLOR", "1").env("MYPYPATH", "tools")
+    mypy = cmd("mypy --pretty --color-output").env("MYPY_FORCE_COLOR", "1")
     parallel(*mypy.foreach(context.all_files)).fg()
 
 
 def check_python_format(context: CheckContext):
-    black = cmd("black", "--line-length 100", "--check" if not context.fix else "")
+    black = cmd("black", "--check" if not context.fix else "")
     parallel(*black.foreach(context.modified_files)).fg()