app-eselect/eselect-python: Use C wrapper for python{,2,3}, #568974

Use python-exec2-c to wrap /usr/bin/python{,2,3}, rather than the Python
wrapper. This is both more correct, and fixes Prefix support since
non-Linux systems require programs referenced in shebangs to be real
executables rather than scripts.

1 files changed, 89 insertions, 0 deletions

diff --git a/app-eselect/eselect-python/eselect-python-20151117-r3.ebuild b/app-eselect/eselect-python/eselect-python-20151117-r3.ebuild
new file mode 100644
index 000000000000..7c478b04704d
--- /dev/null
+++ b/app-eselect/eselect-python/eselect-python-20151117-r3.ebuild
@@ -0,0 +1,89 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+if [[ ${PV} == "99999999" ]] ; then
+	inherit autotools git-r3
+	EGIT_REPO_URI="git://anongit.gentoo.org/proj/${PN}.git"
+else
+	SRC_URI="https://dev.gentoo.org/~mgorny/dist/${P}.tar.bz2"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~sparc-fbsd ~x86-fbsd ~ppc-aix ~x64-freebsd ~x86-freebsd ~hppa-hpux ~ia64-hpux ~x86-interix ~amd64-linux ~ia64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+fi
+
+DESCRIPTION="Eselect module for management of multiple Python versions"
+HOMEPAGE="https://www.gentoo.org/proj/en/Python/"
+
+LICENSE="GPL-2"
+SLOT="0"
+IUSE=""
+
+RDEPEND=">=app-admin/eselect-1.2.3
+	>=dev-lang/python-exec-2.2_pre:2
+	!<dev-lang/python-2.7.10-r4:2.7
+	!<dev-lang/python-3.3.5-r4:3.3
+	!<dev-lang/python-3.4.3-r4:3.4
+	!<dev-lang/python-3.5.0-r3:3.5"
+
+# Those files are copied from built package
+QA_PREBUILT="
+	/usr/bin/python
+	/usr/bin/python2
+	/usr/bin/python3"
+
+src_prepare() {
+	[[ ${PV} == "99999999" ]] && eautoreconf
+}
+
+src_install() {
+	keepdir /etc/env.d/python
+	emake DESTDIR="${D}" install || die
+
+	local f
+	for f in python{,2,3}; do
+		# can't use symlinks here since random stuff
+		# loves to do readlink on sys.executable...
+		newbin "${EPREFIX}/usr/lib/python-exec/python-exec2-c" "${f}"
+	done
+	for f in python{,2,3}-config 2to3 idle pydoc pyvenv; do
+		dosym ../lib/python-exec/python-exec2 /usr/bin/"${f}"
+	done
+}
+
+pkg_preinst() {
+	local py
+
+	# Copy python[23] selection from the old format (symlink)
+	for py in 2 3; do
+		# default to none
+		declare -g "PREV_PYTHON${py}"=
+
+		if [[ -L ${EROOT}/usr/bin/python${py} ]]; then
+			local target=$(readlink "${EROOT}/usr/bin/python${py}")
+
+			# check if it's actually old eselect symlink
+			if [[ ${target} == python?.? ]]; then
+				declare -g "PREV_PYTHON${py}=${target}"
+			fi
+		fi
+	done
+}
+
+pkg_postinst() {
+	local py
+
+	if has_version 'dev-lang/python'; then
+		eselect python update --if-unset
+	fi
+
+	for py in 2 3; do
+		local pyvar=PREV_PYTHON${py}
+		if [[ -n ${!pyvar} ]]; then
+			einfo "Setting Python${py} to ${!pyvar}"
+			eselect python set "--python${py}" "${!pyvar}"
+		elif has_version "=dev-lang/python-${py}*"; then
+			eselect python update "--python${py}" --if-unset
+		fi
+	done
+}