Continue python3 journey

.travis.yml

@@ -30,7 +30,7 @@ before_install:
   - sudo apt-get install -y --allow-unauthenticated postgresql-$POSTGRESQL_VERSION-postgis-$POSTGIS_VERSION postgresql-$POSTGRESQL_VERSION-postgis-$POSTGIS_VERSION-scripts postgis
 
   # For pre12, install plpython2. For PG12 install plpython3
-  - if [[ $POSTGRESQL_VERSION != '12' ]]; then sudo apt-get install -y postgresql-plpython-$POSTGRESQL_VERSION python python-pip python-software-properties python-joblib python-nose; else sudo apt-get install -y postgresql-plpython3-12 python3 python3-pip python3-software-properties python3-joblib python3-nose; fi;
+  - if [[ $POSTGRESQL_VERSION != '12' ]]; then sudo apt-get install -y postgresql-plpython-$POSTGRESQL_VERSION python python-pip python-software-properties python-joblib python-nose python-setuptools; else sudo apt-get install -y postgresql-plpython3-12 python3 python3-pip python3-software-properties python3-joblib python3-nose python3-setuptools; fi;
 
   - sudo pg_dropcluster --stop $POSTGRESQL_VERSION main
   - sudo rm -rf /etc/postgresql/$POSTGRESQL_VERSION /var/lib/postgresql/$POSTGRESQL_VERSION

src/pg/Makefile

@@ -21,7 +21,7 @@ SOURCES_DATA = $(wildcard $(SOURCES_DATA_DIR)/*.sql)
 
 REPLACEMENTS = -e 's/@@VERSION@@/$(EXTVERSION)/g'
 ifneq ($(PYTHON3), true)
-	REPLACEMENTS = -e 's/@@VERSION@@/$(EXTVERSION)/g' -e
+	REPLACEMENTS = -e 's/@@VERSION@@/$(EXTVERSION)/g' -e 's/plpython3u/plpythonu/g'
 endif
 
 $(DATA): $(SOURCES_DATA)