MDEV-19110: Remove Cassandra from Debian packaging

Cassandra has deprecated their Thrift interface years ago (a few months
after Cassandra SE was released). The new way to access Cassandra is to
use the CQL Connector, which does not use Thrift.

There have been talks to make a CassandraSE V2 but no usable code have
been produced. The motivation to keep CassandraSE in the MariaDB source
code is to have it as an example for such future attempts.

It can stay in the source code but it should be removed from packaging
to avoid Debian packaging maintenance work around trying to compile it
and have tests pass on new platform.

If somebody wants Cassandra, they can use the 10.4 branch.

debian/autobake-deb.sh

@@ -80,12 +80,6 @@ fi
 # Always remove AWS plugin, see -DNOT_FOR_DISTRIBUTION in CMakeLists.txt
 sed '/Package: mariadb-plugin-aws-key-management-10.2/,/^$/d' -i debian/control
 
-# Don't build Cassandra package if Thrift is not installed
-if [[ ! -f /usr/local/include/thrift/Thrift.h && ! -f /usr/include/thrift/Thrift.h ]]
-then
-  sed '/Package: mariadb-plugin-cassandra/,/^$/d' -i debian/control
-fi
-
 # If libpcre2-dev is not available (before Debian Stretch and Ubuntu Xenial)
 # attempt to build using older libpcre3-dev (SIC!)
 if ! apt-cache madison libpcre2-dev | grep --quiet 'libpcre2-dev'
@@ -93,7 +87,7 @@ then
   sed 's/libcurl4-openssl-dev | libcurl4-dev/libpcre3-dev/' -i debian/control
 fi
 
-# Cassandra, Mroonga etc never built on Travis CI anyway, see build flags above
+# Mroonga, Spider etc never built on Travis CI anyway, see build flags above
 if [[ $TRAVIS ]]
 then
   sed -i -e "/Package: mariadb-plugin-mroonga/,/^$/d" debian/control

debian/control

@@ -718,29 +718,6 @@ Description: Spider storage engine for MariaDB
  instances to be handled as if they were on the same instance. It refers to one
  possible implementation of ISO/IEC 9075-9:2008 SQL/MED.
 
-Package: mariadb-plugin-cassandra
-Architecture: any
-Depends: mariadb-server-10.5 (= ${binary:Version}),
-         ${misc:Depends},
-         ${shlibs:Depends}
-Breaks: mariadb-server-10.0,
-        mariadb-server-10.1,
-        mariadb-server-10.2,
-        mariadb-server-10.3,
-        mariadb-server-10.4
-Replaces: mariadb-server-10.0,
-          mariadb-server-10.1,
-          mariadb-server-10.2,
-          mariadb-server-10.3,
-          mariadb-server-10.4
-Description: Cassandra storage engine for MariaDB
- The Cassandra Storage Engine allows access to data in a Cassandra cluster from
- MariaDB, combining the best of SQL and no-SQL worlds. Cassandra SE (storage
- engine) makes Cassandra's column family appear as a table in MariaDB that you
- can insert to, update, and select from. You can write joins against this table,
- it is possible to join data that's stored in MariaDB with data that's stored in
- Cassandra.
-
 Package: mariadb-plugin-gssapi-server
 Architecture: any
 Depends: libgssapi-krb5-2,

debian/mariadb-plugin-cassandra.install

-etc/mysql/conf.d/cassandra.cnf etc/mysql/mariadb.conf.d
-usr/lib/mysql/plugin/ha_cassandra.so

debian/rules

@@ -86,6 +86,7 @@ endif
 	    -DCMAKE_SYSTEM_PROCESSOR=$(DEB_HOST_ARCH) \
 	    -DBUILD_CONFIG=mysql_release \
 	    -DWITHOUT_TOKUDB=true \
+	    -DWITHOUT_CASSANDRA=true \
 	    -DPLUGIN_AWS_KEY_MANAGEMENT=NO \
 	    -DDEB=$(DEB_VENDOR) ..'