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#!/usr/bin/env python3
import filecmp
import os
import shutil
import sys
# The public SDKs for some embedded platforms are missing cross-platform
# headers that WebKit uses. The xcfilelists given to this script pair a
# framework or header directory from another SDK (i.e. macOS or iOS) with an
# output path in $(WK_DERIVED_SDK_HEADERS_DIR). Symlink the SDK header to its
# destination, where the rest of the build can use it.
srcs = open(os.environ['SCRIPT_INPUT_FILE_LIST_0'])
dsts = open(os.environ['SCRIPT_OUTPUT_FILE_LIST_0'])
def ln_sfh(src, dst):
print(src, '->', dst, flush=True)
os.symlink(src, f'{dst}.new')
os.replace(f'{dst}.new', dst)
def framework_headers_cmp(src, dst):
if os.path.isfile(src):
return filecmp.cmp(src, dst)
else:
def diff(dcmp):
return dcmp.left_only or dcmp.right_only or \
any(not file.endswith('.tbd') for file in dcmp.diff_files) or \
any(diff(subdcmp) for subdcmp in dcmp.subdirs.values())
return not diff(filecmp.dircmp(src, dst))
failing = False
for src, dst in zip(srcs, dsts):
src = src.rstrip()
dst = dst.rstrip()
src_name = os.path.basename(src)
dst_name = os.path.basename(dst)
if src_name != dst_name:
raise SystemExit(f'error: Input lines do not have matching filenames ("{src_name}" and "{dst_name}). '
'Are the xcfilelist entries in the right order?')
# Keep the list minimal by comparing what's actually in the base SDK, and
# refusing to process a framework or header that is textually identical to
# one in the SDK.
sdkroot_dst = dst.replace(os.environ['WK_DERIVED_SDK_HEADERS_DIR'], os.environ['SDKROOT'])
if os.path.exists(sdkroot_dst) and framework_headers_cmp(src, sdkroot_dst):
additions_sdk = os.environ[f'SDK_DIR_WebKitSDKAdditions_{os.environ["PLATFORM_NAME"]}']
print(f'error: "{src_name}" already exists in the base SDK. It does '
'not need to be symlinked, please remove it from '
f'{additions_sdk}/SymlinkedHeaders.xcconfig.', file=sys.stderr)
failing = True
elif os.path.isfile(src):
ln_sfh(src, dst)
else:
# The build system is not tracking the contents of the tree, so delete
# it first to remove any stale files.
shutil.rmtree(dst, ignore_errors=True)
# Directories being copied may be framework bundles, which contain
# platform-specific TBDs. Ignore them when copying.
shutil.copytree(
src, dst,
ignore=lambda _, names: {name for name in names if name.endswith('.tbd')},
copy_function=ln_sfh
)
if failing:
sys.exit(1)
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