dev-python/socketpool: Make gevent dep optional

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/socketpool/metadata.xml

@@ -9,4 +9,10 @@
     <remote-id type="pypi">socketpool</remote-id>
     <remote-id type="github">benoitc/socketpool</remote-id>
   </upstream>
+  <use>
+    <flag name="gevent">
+      Install <pkg>dev-python/gevent</pkg> as needed for the gevent
+      backend.
+    </flag>
+  </use>
 </pkgmetadata>

dev-python/socketpool/socketpool-0.5.3-r2.ebuild

@@ -11,13 +11,26 @@ DESCRIPTION="A simple Python socket pool"
 HOMEPAGE="https://github.com/benoitc/socketpool/"
 SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
-KEYWORDS="~alpha amd64 arm arm64 ppc ppc64 s390 ~sparc x86"
-IUSE="examples test"
+KEYWORDS="~alpha amd64 arm arm64 ~ia64 ppc ppc64 s390 ~sparc x86"
+IUSE="examples gevent"
 LICENSE="|| ( MIT public-domain )"
 SLOT="0"
 
-RDEPEND="$(python_gen_cond_dep 'dev-python/gevent[${PYTHON_USEDEP}]' 'python2*')"
-BDEPEND="dev-python/setuptools[${PYTHON_USEDEP}]"
+RDEPEND="
+	gevent? (
+		$(python_gen_cond_dep '
+			dev-python/gevent[${PYTHON_USEDEP}]
+		' 'python*')
+	)"
+
+BDEPEND="
+	test? (
+		!ia64? (
+			$(python_gen_cond_dep '
+				dev-python/gevent[${PYTHON_USEDEP}]
+			' 'python*')
+		)
+	)"
 
 PATCHES=( "${FILESDIR}"/${PN}-0.5.2-locale.patch )