feat: customizable persistent volumes for devenv docker blocks (#111412)

.github/CODEOWNERS

@@ -310,6 +310,7 @@
 /devenv/docker/blocks/webdav/ @grafana/alerting-backend
 /devenv/docker/buildcontainer/ @bergquist
 /devenv/docker/compose_header.yml @grafana/grafana-backend-services-squad
+/devenv/docker/compose_volume_section.yml @grafana/grafana-backend-services-squad
 /devenv/docker/debtest/ @bergquist
 /devenv/docker/ha-test-unified-alerting/ @grafana/alerting-backend
 /devenv/docker/ha_test/ @grafana/grafana-backend-services-squad

devenv/create_docker_compose.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+shopt -s nullglob # Enable nullglob
+
 blocks_dir=docker/blocks
 docker_dir=docker
 template_dir=templates
@@ -8,6 +10,8 @@ grafana_config_file=conf.tmp
 grafana_config=config
 
 compose_header_file=docker/compose_header.yml
+compose_volume_section_file=docker/compose_volume_section.yml
+compose_volume_section_create_flag=docker_volume_create_true
 compose_file=docker-compose.yaml
 env_file=.env
 
@@ -60,3 +64,27 @@ for dir in $@; do
     fi
 done
 
+volume_files=$($blocks_dir/**/$compose_volume_section_create_flag)
+
+if [[ ${#volume_files[@]} -ne 0 ]]; then
+    echo "Adding volume section to $compose_file"
+    cat $compose_volume_section_file >> $compose_file
+    echo "" >> $compose_file
+
+    for dir in $@; do
+        current_dir=$blocks_dir/$dir
+        if [ ! -d "$current_dir" ]; then
+            echo "$current_dir is not a directory"
+            exit 1
+        fi
+
+
+        if [ -f $current_dir/$compose_volume_section_create_flag ]; then
+            echo "Adding volume for $current_dir to $compose_file"
+            echo "  $dir-data-volume:" >> $compose_file
+            echo "" >> $compose_file
+        fi
+    done
+
+    cat $compose_file
+fi

devenv/docker/compose_volume_section.yml

@@ -0,0 +1 @@
+volumes: