void-packages/common/hooks/post-install/07-rewrite-python-shebang.sh

# This hook executes the following tasks:
#	- rewrites python shebangs with the corresponding python version

hook() {
	local pyver= shebang= warn=

	for i in $python_versions; do
		if [ "$pyver" ]; then
			warn=1
			break;
		fi
		pyver=$i
	done

	: ${pyver:=2.7}
	shebang="#!/usr/bin/python$pyver"
	find ${PKGDESTDIR} -type f -print0 | \
		xargs -0 grep -l -m 1 "^#!.*\([[:space:]]\|/\)python\([[:space:]]\|$\)" -- | while IFS= read -r f; do
		if [ "$warn" ]; then
			msg_warn "$pkgname: multiple python versions defined!"
			msg_warn "$pkgname: using $pyver for shebang"
			warn=
		fi
		echo "   Unversioned shebang replaced by '$shebang': ${f#$PKGDESTDIR}"
		sed -i "1s@.*python@${shebang}@" -- "$f"
	done
}