setup.py

# Copyright 2025 Adobe. All rights reserved.
# This file is licensed to you under the Apache License,
# Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
# or the MIT license (http://opensource.org/licenses/MIT),
# at your option.

# Unless required by applicable law or agreed to in writing,
# this software is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR REPRESENTATIONS OF ANY KIND, either express or
# implied. See the LICENSE-MIT and LICENSE-APACHE files for the
# specific language governing permissions and limitations under
# each license.

from setuptools import setup, find_namespace_packages
import sys
import platform
import shutil
from pathlib import Path
import toml

# Read version from pyproject.toml
def get_version():
    pyproject = toml.load("pyproject.toml")
    return pyproject["project"]["version"]

VERSION = get_version()
PACKAGE_NAME = "c2pa-python"  # Define package name as a constant

# Define platform to library extension mapping (for reference only)
PLATFORM_EXTENSIONS = {
    'win_amd64': 'dll',
    'win_arm64': 'dll',
    'apple-darwin': 'dylib', # universal
    'linux_x86_64': 'so',
    'linux_aarch64': 'so',
}

# Based on what c2pa-rs repo publishes
PLATFORM_FOLDERS = {
    'universal-apple-darwin': 'dylib',
    'aarch64-apple-darwin': 'dylib',
    'x86_64-apple-darwin': 'dylib',
    'x86_64-pc-windows-msvc': 'dll',
    'x86_64-unknown-linux-gnu': 'so',
    'aarch64-unknown-linux-gnu': 'so',
}

# Directory structure
ARTIFACTS_DIR = Path('artifacts')  # Where downloaded libraries are stored
PACKAGE_LIBS_DIR = Path('src/c2pa/libs')  # Where libraries will be copied for the wheel


def get_platform_identifier(target_arch=None) -> str:
    """Get a platform identifier (arch-os) for the current system or target architecture.

    Args:
        target_arch: Optional target architecture.
          If provided, overrides auto-detection.
          For macOS: 'universal2', 'arm64', or 'x86_64'
          For Linux: 'aarch64' or 'x86_64'
          For Windows: 'arm64' or 'x64'

    Returns one of:
    - universal-apple-darwin (for macOS universal)
    - aarch64-apple-darwin (for macOS ARM64)
    - x86_64-apple-darwin (for macOS x86_64)
    - x86_64-pc-windows-msvc (for Windows 64-bit)
    - x86_64-unknown-linux-gnu (for Linux 64-bit)
    - aarch64-unknown-linux-gnu (for Linux ARM64)
    """
    system = platform.system().lower()

    if system == "darwin":
        if target_arch == "arm64":
            return "aarch64-apple-darwin"
        elif target_arch == "x86_64":
            return "x86_64-apple-darwin"
        else:
            return "universal-apple-darwin"
    elif system == "windows":
        if target_arch == "arm64":
            return "aarch64-pc-windows-msvc"
        else:
            return "x86_64-pc-windows-msvc"
    elif system == "linux":
        if target_arch == "aarch64" or platform.machine() == "aarch64":
            return "aarch64-unknown-linux-gnu"
        else:
            return "x86_64-unknown-linux-gnu"
    else:
        raise ValueError(f"Unsupported operating system: {system}")

def get_platform_classifier(platform_name):
    """Get the appropriate classifier for a platform."""
    if platform_name.startswith('win') or platform_name.endswith('windows-msvc'):
        return "Operating System :: Microsoft :: Windows"
    elif platform_name.startswith('macosx') or platform_name.endswith('apple-darwin'):
        return "Operating System :: MacOS"
    elif platform_name.startswith('linux') or platform_name.endswith('linux-gnu'):
        return "Operating System :: POSIX :: Linux"
    else:
        raise ValueError(f"Unknown platform: {platform_name}")

def get_current_platform():
    """Determine the current platform name."""
    if sys.platform == "win32":
        if platform.machine() == "ARM64":
            return "win_arm64"
        return "win_amd64"
    elif sys.platform == "darwin":
        if platform.machine() == "arm64":
            return "macosx_aarch64"
        return "macosx_x86_64"
    else:  # Linux
        if platform.machine() == "aarch64":
            return "linux_aarch64"
        return "linux_x86_64"

def copy_platform_libraries(platform_name, clean_first=False):
    """Copy libraries for a specific platform to the package libs directory.

    Args:
        platform_name: The platform to copy libraries for
        clean_first: If True, remove existing files in PACKAGE_LIBS_DIR first
    """
    platform_dir = ARTIFACTS_DIR / platform_name

    # Ensure the platform directory exists and contains files
    if not platform_dir.exists():
        raise ValueError(f"Platform directory not found: {platform_dir}")

    # Get list of all files in the platform directory
    platform_files = list(platform_dir.glob('*'))
    if not platform_files:
        raise ValueError(f"No files found in platform directory: {platform_dir}")

    # Clean and recreate the package libs directory if requested
    if clean_first and PACKAGE_LIBS_DIR.exists():
        shutil.rmtree(PACKAGE_LIBS_DIR)

    # Ensure the package libs directory exists
    PACKAGE_LIBS_DIR.mkdir(parents=True, exist_ok=True)

    # Copy files from platform-specific directory to the package libs directory
    for file in platform_files:
        if file.is_file():
            shutil.copy2(file, PACKAGE_LIBS_DIR / file.name)

def find_available_platforms():
    """Scan the artifacts directory for available platform-specific libraries."""
    if not ARTIFACTS_DIR.exists():
        print(f"Warning: Artifacts directory not found: {ARTIFACTS_DIR}")
        return []

    available_platforms = []
    for platform_name in PLATFORM_FOLDERS.keys():
        platform_dir = ARTIFACTS_DIR / platform_name
        if platform_dir.exists() and any(platform_dir.iterdir()):
            available_platforms.append(platform_name)

    if not available_platforms:
        print("Warning: No platform-specific libraries found in artifacts directory")
        return []

    return available_platforms

# For development installation
if 'develop' in sys.argv or 'install' in sys.argv:
    current_platform = get_platform_identifier()
    print("Installing in development mode for platform ", current_platform)
    copy_platform_libraries(current_platform)

# For wheel building (both bdist_wheel and build)
if 'bdist_wheel' in sys.argv or 'build' in sys.argv:
    # Check if we're building for a specific architecture
    # This is mostly to support macOS wheel builds
    target_arch = None
    for i, arg in enumerate(sys.argv):
        if arg == '--plat-name':
            if i + 1 < len(sys.argv):
                plat_name = sys.argv[i + 1]
                if 'arm64' in plat_name:
                    target_arch = 'arm64'
                elif 'x86_64' in plat_name:
                    target_arch = 'x86_64'
                elif 'universal2' in plat_name:
                    target_arch = 'universal2'
                break

    # Get the platform identifier for the target architecture
    target_platform = get_platform_identifier(target_arch)
    print(f"Building wheel for target platform: {target_platform}")

    # Check if we have libraries for this platform
    platform_dir = ARTIFACTS_DIR / target_platform
    if not platform_dir.exists() or not any(platform_dir.iterdir()):
        print(f"Warning: No libraries found for platform {target_platform}")
        print("Available platforms:")
        for platform_name in find_available_platforms():
            print(f"  - {platform_name}")

    # Copy libraries for the target platform
    try:
        copy_platform_libraries(target_platform, clean_first=True)

        # Build the wheel
        setup(
            name=PACKAGE_NAME,
            version=VERSION,
            package_dir={"": "src"},
            packages=find_namespace_packages(where="src"),
            include_package_data=True,
            package_data={
                "c2pa": ["libs/*"],
            },
            classifiers=[
                "Programming Language :: Python :: 3",
                get_platform_classifier(target_platform),
            ],
            python_requires=">=3.10",
            long_description=open("README.md").read(),
            long_description_content_type="text/markdown",
            license="MIT OR Apache-2.0",
        )
    finally:
        # Clean up
        if PACKAGE_LIBS_DIR.exists():
            shutil.rmtree(PACKAGE_LIBS_DIR)
    sys.exit(0)

# For sdist and development installation
setup(
    name=PACKAGE_NAME,
    version=VERSION,
    package_dir={"": "src"},
    packages=find_namespace_packages(where="src"),
    include_package_data=True,
    package_data={
        "c2pa": ["libs/*"],  # Include all files in libs directory
    },
    classifiers=[
        "Programming Language :: Python :: 3",
        get_platform_classifier(get_current_platform()),
    ],
    python_requires=">=3.10",
    long_description=open("README.md").read(),
    long_description_content_type="text/markdown",
    license="MIT OR Apache-2.0",
)