configure/packaging: introduce Cython dependency

To prepare for the migration of rbd.py to Cython, add Cython as a package
dependency and have the configure script look for it.

Also adds Cython as a dependency for admin/build-doc, and changes the
virtualenv to allow usage of system packages (to avoid having to compile
Cython inside the virtualenv).

With contributions by Josh Durgin <[email protected]>

Signed-off-by: Hector Martin <[email protected]>

admin/build-doc

@@ -7,7 +7,7 @@ TOPDIR=`pwd`
 install -d -m0755 build-doc
 
 if command -v dpkg >/dev/null; then
-    for package in python-dev python-pip python-virtualenv doxygen ditaa ant libxml2-dev libxslt1-dev; do
+    for package in python-dev python-pip python-virtualenv doxygen ditaa ant libxml2-dev libxslt1-dev cython; do
 	if [ "$(dpkg --status -- $package|sed -n 's/^Status: //p')" != "install ok installed" ]; then
             # add a space after old values
 	    missing="${missing:+$missing }$package"
@@ -19,7 +19,7 @@ if command -v dpkg >/dev/null; then
 	exit 1
     fi
 elif command -v yum >/dev/null; then
-    for package in python-devel python-pip python-virtualenv doxygen ditaa ant libxml-devel libxslt-devel; do
+    for package in python-devel python-pip python-virtualenv doxygen ditaa ant libxml-devel libxslt-devel Cython; do
 	if ! rpm -q $package >/dev/null ; then
 		missing="${missing:+$missing }$package"
 	fi
@@ -30,7 +30,7 @@ elif command -v yum >/dev/null; then
         exit 1
     fi
 else
-    for command in virtualenv doxygen ant ditaa; do
+    for command in virtualenv doxygen ant ditaa cython; do
 	command -v "$command" > /dev/null;
 	ret_code=$?
 	if [ $ret_code -ne 0 ]; then
@@ -56,7 +56,7 @@ cd build-doc
 [ -z "$vdir" ] && vdir="./virtualenv"
 
 if [ ! -e $vdir ]; then
-    virtualenv --no-site-packages $vdir
+    virtualenv --system-site-packages $vdir
 fi
 $vdir/bin/pip install --quiet -r ../admin/doc-requirements.txt
 

ceph.spec.in

@@ -106,6 +106,7 @@ BuildRequires:	boost-devel
 BuildRequires:  cmake
 BuildRequires:	cryptsetup
 BuildRequires:	fuse-devel
+BuildRequires:	Cython
 BuildRequires:	gdbm
 BuildRequires:	hdparm
 BuildRequires:	leveldb-devel > 1.2

configure.ac

@@ -125,6 +125,12 @@ AC_ARG_WITH([rbd],
 AM_CONDITIONAL(WITH_RBD, test "$with_rbd" = "yes")
 #AS_IF([test "$with_rbd" = "yes"], [AC_DEFINE([WITH_RADOS, WITH_RBD])])
 
+AC_ARG_WITH([cython],
+	[AS_HELP_STRING([--with-cython], [build python bindings for librbd])],
+	[],
+	[with_cython=yes])
+AM_CONDITIONAL(WITH_CYTHON, test "$with_cython" = "yes")
+
 # cephfs?
 # cephfs requires rados
 AC_ARG_WITH([cephfs],
@@ -201,6 +207,14 @@ AC_ARG_ENABLE([server],
 AM_CONDITIONAL(ENABLE_SERVER, test "$enable_server" = "yes")
 #AS_IF([test "$enable_server" = "yes"], [AC_DEFINE([WITH_MON, WITH_OSD, WITH_MDS, ENABLE_SERVER])])
 
+# cython is required to build librbd python bindings
+if test x"$with_cython" = xyes; then
+    AC_CHECK_PROG(CYTHON_CHECK, cython, yes)
+    if test x"$CYTHON_CHECK" != xyes; then
+        AC_MSG_FAILURE([cython not found])
+    fi
+fi
+
 # cond-check if snappy-devel is installed, needed by leveldb that is need by server parts of the project
 AS_IF([test "$enable_server" = "yes" -a \( "$with_osd" = "yes" -o "$with_mon" = "yes" \)],
 	[AC_CHECK_LIB([snappy], [snappy_compress], [true], [AC_MSG_FAILURE([libsnappy not found])])])

debian/control

@@ -13,6 +13,7 @@ Build-Depends: autoconf,
 	       libbz2-dev,
 	       cmake,
 	       cryptsetup-bin | cryptsetup,
+               cython,
                debhelper (>= 6.0.7~),
                default-jdk,
                git,