cpython/Modules/expat/refresh.sh
Stan Ulbrych d5cb9f6a9b
gh-144363: Update bundled libexpat to 2.7.4 (#144365)
* Update to 2.7.4

* update expat license copyright year to match and a pedantic #define

* include COPYING update in refresh.sh

* Update checksum for copying

---------

Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Petr Viktorin <encukou@gmail.com>
2026-02-05 13:58:18 +01:00

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#!/usr/bin/env bash
#
# Use this script to update libexpat
set -e
set -o pipefail
if [[ "${BASH_VERSINFO[0]}" -lt 4 ]]; then
echo "A bash version >= 4 required. Got: $BASH_VERSION" >&2
exit 1
fi
# Update this when updating to a new version after verifying that the changes
# the update brings in are good. These values are used for verifying the SBOM, too.
expected_libexpat_tag="R_2_7_4"
expected_libexpat_version="2.7.4"
expected_libexpat_sha256="461ecc8aa98ab1a68c2db788175665d1a4db640dc05bf0e289b6ea17122144ec"
expat_dir="$(realpath "$(dirname -- "${BASH_SOURCE[0]}")")"
cd ${expat_dir}
# Step 1: download and copy files
curl --location "https://github.com/libexpat/libexpat/releases/download/${expected_libexpat_tag}/expat-${expected_libexpat_version}.tar.gz" > libexpat.tar.gz
echo "${expected_libexpat_sha256} libexpat.tar.gz" | sha256sum --check
# Step 2: Pull files from the libexpat distribution
tar xzvf libexpat.tar.gz "expat-${expected_libexpat_version}/COPYING" --strip-components 2
declare -a lib_files
lib_files=(
ascii.h
asciitab.h
expat.h
expat_external.h
iasciitab.h
internal.h
latin1tab.h
nametab.h
siphash.h
utf8tab.h
winconfig.h
xmlparse.c
xmlrole.c
xmlrole.h
xmltok.c
xmltok.h
xmltok_impl.c
xmltok_impl.h
xmltok_ns.c
)
for f in "${lib_files[@]}"; do
tar xzvf libexpat.tar.gz "expat-${expected_libexpat_version}/lib/${f}" --strip-components 2
done
rm libexpat.tar.gz
# Step 3: Add the namespacing include to expat_external.h
sed -i 's/# define Expat_External_INCLUDED 1/&\n\/* Namespace external symbols to allow multiple libexpat version to\n co-exist. \*\/\n#include "pyexpatns.h"/' expat_external.h
if ! grep -q '#include "pyexpatns\.h"' expat_external.h; then
echo "
Error: namespacing include not found in expat_external.h;
This may be due to source changes and will require updating this script" >&2
exit 1
fi
echo "
Updated! next steps:
- Verify all is okay:
git diff
git status
- Regenerate the sbom file
make regen-sbom
- Update warning count in Tools/build/.warningignore_macos
(use info from CI if not on a Mac)
"