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contrib: macdeploy: Correctly generate macOS SDK
Previously, we did not include the macOS SDK libc++ headers in our SDK creation process and instead used whichever libc++ headers shipped with the clang package we downloaded in depends. This change adds a script (which works on both GNU/Linux and macOS) to correctly generate the macOS SDK including the libc++ headers. This can be thought of as a simplified rewrite of tpoechtrager's script: https://github.com/tpoechtrager/osxcross/blob/d3392f4eae78f3fa3f1fd065fa423f2712825102/tools/gen_sdk_package.sh The location within the SDK where we place the libc++ headers is chosen such that clang's search path detection logic for sysroots would pick up the headers properly. We also document this change.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| #!/usr/bin/env python3 | ||
| import argparse | ||
| import plistlib | ||
| import pathlib | ||
| import sys | ||
| import tarfile | ||
| import gzip | ||
| import os | ||
| import contextlib | ||
|
|
||
| @contextlib.contextmanager | ||
| def cd(path): | ||
| """Context manager that restores PWD even if an exception was raised.""" | ||
| old_pwd = os.getcwd() | ||
| os.chdir(str(path)) | ||
| try: | ||
| yield | ||
| finally: | ||
| os.chdir(old_pwd) | ||
|
|
||
| def run(): | ||
| parser = argparse.ArgumentParser( | ||
| description=__doc__, formatter_class=argparse.RawTextHelpFormatter) | ||
|
|
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| parser.add_argument('xcode_app', metavar='XCODEAPP', nargs=1) | ||
| parser.add_argument("-o", metavar='OUTSDKTGZ', nargs=1, dest='out_sdktgz', required=False) | ||
|
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| args = parser.parse_args() | ||
|
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| xcode_app = pathlib.Path(args.xcode_app[0]).resolve() | ||
| assert xcode_app.is_dir(), "The supplied Xcode.app path '{}' either does not exist or is not a directory".format(xcode_app) | ||
|
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||
| xcode_app_plist = xcode_app.joinpath("Contents/version.plist") | ||
| with xcode_app_plist.open('rb') as fp: | ||
| pl = plistlib.load(fp) | ||
| xcode_version = pl['CFBundleShortVersionString'] | ||
| xcode_build_id = pl['ProductBuildVersion'] | ||
| print("Found Xcode (version: {xcode_version}, build id: {xcode_build_id})".format(xcode_version=xcode_version, xcode_build_id=xcode_build_id)) | ||
|
|
||
| sdk_dir = xcode_app.joinpath("Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk") | ||
| sdk_plist = sdk_dir.joinpath("System/Library/CoreServices/SystemVersion.plist") | ||
| with sdk_plist.open('rb') as fp: | ||
| pl = plistlib.load(fp) | ||
| sdk_version = pl['ProductVersion'] | ||
| sdk_build_id = pl['ProductBuildVersion'] | ||
| print("Found MacOSX SDK (version: {sdk_version}, build id: {sdk_build_id})".format(sdk_version=sdk_version, sdk_build_id=sdk_build_id)) | ||
|
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| out_name = "Xcode-{xcode_version}-{xcode_build_id}-extracted-SDK-with-libcxx-headers".format(xcode_version=xcode_version, xcode_build_id=xcode_build_id) | ||
|
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||
| xcode_libcxx_dir = xcode_app.joinpath("Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1") | ||
| assert xcode_libcxx_dir.is_dir() | ||
|
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||
| if args.out_sdktgz: | ||
| out_sdktgz_path = pathlib.Path(args.out_sdktgz_path) | ||
| else: | ||
| # Construct our own out_sdktgz if not specified on the command line | ||
| out_sdktgz_path = pathlib.Path("./{}.tar.gz".format(out_name)) | ||
|
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||
| def tarfp_add_with_base_change(tarfp, dir_to_add, alt_base_dir): | ||
| """Add all files in dir_to_add to tarfp, but prepent MEMBERPREFIX to the files' | ||
| names | ||
| e.g. if the only file under /root/bazdir is /root/bazdir/qux, invoking: | ||
| tarfp_add_with_base_change(tarfp, "foo/bar", "/root/bazdir") | ||
| would result in the following members being added to tarfp: | ||
| foo/bar/ -> corresponding to /root/bazdir | ||
| foo/bar/qux -> corresponding to /root/bazdir/qux | ||
| """ | ||
| def change_tarinfo_base(tarinfo): | ||
| if tarinfo.name and tarinfo.name.startswith("./"): | ||
| tarinfo.name = str(pathlib.Path(alt_base_dir, tarinfo.name)) | ||
| if tarinfo.linkname and tarinfo.linkname.startswith("./"): | ||
| tarinfo.linkname = str(pathlib.Path(alt_base_dir, tarinfo.linkname)) | ||
| return tarinfo | ||
| with cd(dir_to_add): | ||
| tarfp.add(".", recursive=True, filter=change_tarinfo_base) | ||
|
|
||
| print("Creating output .tar.gz file...") | ||
| with out_sdktgz_path.open("wb") as fp: | ||
| with gzip.GzipFile(fileobj=fp, compresslevel=9, mtime=0) as gzf: | ||
| with tarfile.open(mode="w", fileobj=gzf) as tarfp: | ||
| print("Adding MacOSX SDK {} files...".format(sdk_version)) | ||
| tarfp_add_with_base_change(tarfp, sdk_dir, out_name) | ||
| print("Adding libc++ headers...") | ||
| tarfp_add_with_base_change(tarfp, xcode_libcxx_dir, "{}/usr/include/c++/v1".format(out_name)) | ||
| print("Done! Find the resulting gzipped tarball at:") | ||
| print(out_sdktgz_path.resolve()) | ||
|
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||
| if __name__ == '__main__': | ||
| run() |