Add redis to docker development setup

With #8392 the `single_process_mode` was removed, which means that
development now also requires a redis.

docker/develop/docker-compose.yml

@@ -1,6 +1,7 @@
 version: "3.4"
 
 volumes:
+  redis_data:
   postgresql_data:
   mysql_data:
   dia_data_tmp:
@@ -21,8 +22,17 @@ services:
       - dia_data_bundle:/diaspora/vendor/bundle
     ports:
       - ${DIASPORA_DOCKER_PORT:-3000}:3000
+    environment:
+      - ENVIRONMENT_REDIS=redis://redis
     depends_on:
       - "${DIASPORA_DOCKER_DB}"
+      - redis
+
+  redis:
+    image: redis:7
+    command: redis-server --save 60 1 --loglevel warning
+    volumes:
+      - redis_data:/data
 
   postgresql:
     image: postgres:10.3

docker/develop/docker-entrypoint.sh

@@ -18,18 +18,11 @@ chown -R $HOST_UID:$HOST_GID /home/diaspora
 mkdir -p /diaspora/tmp/pids
 chown $HOST_UID:$HOST_GID /diaspora/tmp /diaspora/tmp/pids /diaspora/vendor/bundle
 
-# ----- Wait for DB ----
-if [ -z $DIA_NODB ] || [ ! $DIA_NODB -eq 1 ]; then
-  if grep -qFx "  <<: *postgresql" /diaspora/config/database.yml; then
-    host=postgresql
-    port=5432
-  else
-    host=mysql
-    port=3306
-  fi
-
-  c=0
+function wait_for_port() {
+  local host=$1
+  local port=$2
 
+  local c=0
   trap '{ exit 1; }' INT
   while ! (< /dev/tcp/${host}/${port}) 2>/dev/null; do
     printf "\rWaiting for $host:$port to become ready ... ${c}s"
@@ -40,6 +33,18 @@ if [ -z $DIA_NODB ] || [ ! $DIA_NODB -eq 1 ]; then
   if [ ! -z $c ]; then
     printf "\rWaiting for $host:$port to become ready ... done (${c}s)\n"
   fi
+}
+
+if [ -z $DIA_NODB ] || [ ! $DIA_NODB -eq 1 ]; then
+  # ----- Wait for DB -----
+  if grep -qFx "  <<: *postgresql" /diaspora/config/database.yml; then
+    wait_for_port postgresql 5432
+  else
+    wait_for_port mysql 3306
+  fi
+
+  # ----- Wait for Redis -----
+  wait_for_port redis 6379
 fi
 
 cd /diaspora

script/diaspora-dev

@@ -208,6 +208,11 @@ dia_is_db_running() {
   dia_docker_compose ps --services --filter status=running | grep -qx $DIASPORA_DOCKER_DB
 }
 
+dia_is_redis_running() {
+  # Check if redis container is running
+  dia_docker_compose ps --services --filter status=running | grep -qx redis
+}
+
 dia_get_db() {
   # Get currently configured or assumed db type
   grep -q '^  <<: \*mysql' "$DIASPORA_CONFIG_DB" 2>/dev/null && echo mysql || echo postgresql
@@ -324,13 +329,14 @@ dia_exec() {
     # Use a running container
     dia_docker_compose exec $detach diaspora /exec-entrypoint.sh "$@"
   else
-    if ! dia_is_db_running; then not_running=1; fi
+    # stop db/redis if it was not running before
+    if ! dia_is_db_running; then stopdb="dia_docker_compose stop $DIASPORA_DOCKER_DB"; fi
+    if ! dia_is_redis_running; then stopredis="dia_docker_compose stop redis"; fi
     # Start a new container
     echo "No running instance found, starting new one for command execution ..."
     dia_docker_compose run --rm $detach --service-ports diaspora "$@"
-    if [ ! -z $not_running ]; then
-      dia_docker_compose stop $DIASPORA_DOCKER_DB
-    fi
+    $stopdb
+    $stopredis
   fi
 }
 
@@ -449,24 +455,28 @@ dia_setup() {
 
 dia_setup_rails() {
   # Prepare rails, install dependencies, migrate database, ...
-  # stop db if it was not running before
   echo "Setting up environment for tests ..."
+  # stop db/redis if it was not running before
   if ! dia_is_db_running; then stopdb="dia_docker_compose stop $DIASPORA_DOCKER_DB"; fi
+  if ! dia_is_redis_running; then stopredis="dia_docker_compose stop redis"; fi
   dia_docker_compose run --rm diaspora bin/setup
   $stopdb
+  $stopredis
 }
 
 dia_setup_tests() {
   # Prepare all possible tests
-  # stop db if it was not running before
   echo "Setting up environment for tests ..."
+  # stop db/redis if it was not running before
   if ! dia_is_db_running; then stopdb="dia_docker_compose stop $DIASPORA_DOCKER_DB"; fi
+  if ! dia_is_redis_running; then stopredis="dia_docker_compose stop redis"; fi
   dia_docker_compose run \
     --rm \
     -e RAILS_ENV=test \
     diaspora \
     bin/rake db:create db:migrate tests:generate_fixtures assets:generate_error_pages
   $stopdb
+  $stopredis
 }
 
 dia_start() {