update

src/alpine-docker/devcontainer-feature.json

@@ -1,10 +1,14 @@
 {
   "name": "alpine-docker",
   "id": "alpine-docker",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "description": "Installs docker and docker-compose on alpine",
   "documentationURL": "https://github.com/cirolosapio/devcontainers-features/tree/main/src/alpine-docker",
   "options": {
+    "hostDockerGid": {
+      "type": "string",
+      "description": "Docker group id on the host machine (retrieve with \"getent group docker | cut -d: -f3\""
+    },
     "installDockerCompose": {
       "type": "boolean",
       "default": false,

src/alpine-docker/install.sh

@@ -6,6 +6,22 @@ echo "Activating feature 'alpine-docker'"
 
 apk add --no-cache docker
 
+CURRENT_USER=$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)
+echo "CURRENT_USER is $CURRENT_USER"
+echo "HOST_DOCKER_GID is $HOSTDOCKERGID"
+
+HOST_DOCKER_GROUP=$(getent group $HOSTDOCKERGID | cut -d: -f1)
+
+if [[ -z $HOST_DOCKER_GROUP ]]; then
+    echo "HOST_DOCKER_GROUP is empty, creating new group 'host-docker'"
+    addgroup -g $HOSTDOCKERGID host-docker
+    HOST_DOCKER_GROUP=host-docker
+else
+    echo "HOST_DOCKER_GROUP is already used, using existing group '$HOST_DOCKER_GROUP'"
+fi
+
+addgroup $CURRENT_USER $HOST_DOCKER_GROUP
+
 if [[ $INSTALLDOCKERCOMPOSE == "true" ]]; then
     apk add --no-cache docker-compose
 fi