add nanosvg package (#50)

nanosvg/build.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR"
+
+COMMIT="5cefd9847949af6df13f65027fd43af5a7513633"
+INSTALL_DIR="$DIR/nanosvg/install"
+
+# Clone/update source
+if [ ! -d "nanosvg-src/.git" ]; then
+  rm -rf nanosvg-src
+  git clone --depth 1 https://github.com/memononen/nanosvg.git nanosvg-src
+fi
+git -C nanosvg-src fetch --depth 1 origin "$COMMIT"
+git -C nanosvg-src checkout --force FETCH_HEAD
+
+# Copy headers
+rm -rf "$INSTALL_DIR"
+mkdir -p "$INSTALL_DIR/include"
+cp nanosvg-src/src/nanosvg.h "$INSTALL_DIR/include/"
+cp nanosvg-src/src/nanosvgrast.h "$INSTALL_DIR/include/"
+
+echo "Installed nanosvg to $INSTALL_DIR"
+du -sh "$INSTALL_DIR"

nanosvg/nanosvg/__init__.py

@@ -0,0 +1,10 @@
+import os
+
+DIR = os.path.join(os.path.dirname(__file__), "install")
+INCLUDE_DIR = os.path.join(DIR, "include")
+LIB_DIR = DIR  # header-only; no libraries
+
+
+def smoketest():
+  assert os.path.isfile(os.path.join(INCLUDE_DIR, "nanosvg.h")), "nanosvg.h not found"
+  assert os.path.isfile(os.path.join(INCLUDE_DIR, "nanosvgrast.h")), "nanosvgrast.h not found"

nanosvg/pyproject.toml

@@ -0,0 +1,15 @@
+[build-system]
+requires = ["setuptools>=64", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "nanosvg"
+version = "0.0.1"
+description = "NanoSVG: simple SVG parser and rasterizer"
+requires-python = ">=3.8"
+
+[tool.setuptools.packages.find]
+include = ["nanosvg*"]
+
+[tool.setuptools.package-data]
+nanosvg = ["install/**/*"]

nanosvg/setup.py

@@ -0,0 +1,58 @@
+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 BuildNanosvg(build_py):
+  """Run build.sh to download nanosvg headers before collecting package data."""
+
+  def run(self):
+    pkg_dir = os.path.dirname(os.path.abspath(__file__))
+    build_script = os.path.join(pkg_dir, "build.sh")
+    subprocess.check_call(["bash", build_script], cwd=pkg_dir)
+
+    super().run()
+
+
+cmdclass = {"build_py": BuildNanosvg}
+
+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()