void-packages/common/hooks/pre-pkg/03-rewrite-python-shebang.sh

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# This hook executes the following tasks:
# - rewrites python shebangs with the corresponding python version
hook() {
local pyver= shebang= off=
: ${pyver:=2}
if [ -d ${PKGDESTDIR}/usr/lib/python* ]; then
pyver="$(find ${PKGDESTDIR}/usr/lib/python* -prune -type d | grep -o '[[:digit:]]\.[[:digit:]]$')"
fi
if [ -n "$pycompile_version" ]; then
pyver="$pycompile_version"
fi
if [ "$python_version" = "3" ]; then
pyver="$python_version"
fi
shebang="#!/usr/bin/python${pyver%.*}"
find "${PKGDESTDIR}" -type f -print0 | \
xargs -0 grep -H -b -m 1 "^#!.*\([[:space:]]\|/\)python\([0-9]\.[0-9]\)\?\([[:space:]]\+\|$\)" -- | while IFS=: read -r f off _; do
[ -z "$off" ] && continue
echo " Shebang converted to '$shebang': ${f#$PKGDESTDIR}"
sed -i "1s@.*python.*@${shebang}@" -- "$f"
done
}