add cppcheck package (#10)

Cppcheck 2.19.1 static analysis tool, built from source. Includes
the MISRA C addon, cfg files, and platform definitions for opendbc
and panda safety analysis.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -1,6 +1,7 @@
 .git/
 repo/
 .venv/
+__pycache__/
 
 # agents
 .claude/

cppcheck/build.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR"
+
+VERSION="2.19.1"
+INSTALL_DIR="$DIR/cppcheck/install"
+
+# Idempotent: skip if already built
+if [ -x "$INSTALL_DIR/cppcheck" ]; then
+  echo "cppcheck already present, skipping build."
+  exit 0
+fi
+
+NJOBS="$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 2)"
+
+# Clone
+if [ ! -d "cppcheck-src" ]; then
+  git clone --depth 1 --branch "$VERSION" https://github.com/danmar/cppcheck.git cppcheck-src
+fi
+
+# Build
+cd cppcheck-src
+make MATCHCOMPILER=yes CXXFLAGS="-O2" -j"$NJOBS"
+cd "$DIR"
+
+# Install
+rm -rf "$INSTALL_DIR"
+mkdir -p "$INSTALL_DIR"
+
+cp cppcheck-src/cppcheck "$INSTALL_DIR/"
+cp -r cppcheck-src/addons "$INSTALL_DIR/"
+cp -r cppcheck-src/cfg "$INSTALL_DIR/"
+cp -r cppcheck-src/platforms "$INSTALL_DIR/"
+strip "$INSTALL_DIR/cppcheck" 2>/dev/null || true
+
+# Clean up
+rm -rf cppcheck-src
+
+echo "Installed cppcheck to $INSTALL_DIR"
+du -sh "$INSTALL_DIR"

cppcheck/cppcheck/__init__.py

@@ -0,0 +1,16 @@
+import os
+import sys
+
+DIR = os.path.join(os.path.dirname(__file__), "install")
+
+
+def _run():
+  binary = os.path.join(DIR, "cppcheck")
+  os.execvp(binary, ["cppcheck"] + sys.argv[1:])
+
+
+def smoketest():
+  import subprocess
+  binary = os.path.join(DIR, "cppcheck")
+  result = subprocess.run([binary, "--version"], capture_output=True, text=True, check=True)
+  print(result.stdout.strip())

cppcheck/pyproject.toml

@@ -0,0 +1,18 @@
+[build-system]
+requires = ["setuptools>=64", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "cppcheck"
+version = "2.19.1"
+description = "Cppcheck static analysis tool"
+requires-python = ">=3.8"
+
+[project.scripts]
+cppcheck = "cppcheck:_run"
+
+[tool.setuptools.packages.find]
+include = ["cppcheck*"]
+
+[tool.setuptools.package-data]
+cppcheck = ["install/**/*"]

cppcheck/setup.py

@@ -0,0 +1,61 @@
+import os
+import platform
+import subprocess
+
+from setuptools.command.build_py import build_py
+
+try:
+  from wheel.bdist_wheel import bdist_wheel
+except ImportError:
+  bdist_wheel = None
+
+
+class BuildCppcheck(build_py):
+  """Run build.sh to compile cppcheck before collecting package data."""
+
+  def run(self):
+    pkg_dir = os.path.dirname(os.path.abspath(__file__))
+    marker = os.path.join(pkg_dir, "cppcheck", "install", "cppcheck")
+
+    if not os.path.exists(marker):
+      build_script = os.path.join(pkg_dir, "build.sh")
+      subprocess.check_call(["bash", build_script], cwd=pkg_dir)
+
+    super().run()
+
+
+cmdclass = {"build_py": BuildCppcheck}
+
+if bdist_wheel is not None:
+
+  class PlatformWheel(bdist_wheel):
+    """Produce a platform-specific, Python-version-agnostic wheel."""
+
+    def finalize_options(self):
+      super().finalize_options()
+      self.root_is_pure = False
+
+    def get_tag(self):
+      system = platform.system()
+      machine = platform.machine()
+
+      if system == "Linux":
+        plat = f"linux_{machine}"
+      elif system == "Darwin":
+        plat = "macosx_11_0_arm64"
+      else:
+        plat = f"{system.lower()}_{machine}"
+
+      return "py3", "none", plat
+
+  cmdclass["bdist_wheel"] = PlatformWheel
+
+
+def setup():
+  from setuptools import setup as _setup
+
+  _setup(cmdclass=cmdclass)
+
+
+if __name__ == "__main__":
+  setup()