Add EXTRA_GROUPS env var for beetle user group membership

CHANGELOG.md

@@ -26,10 +26,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added ability to define more groups to take care of ACLs, so that our non-root user can delete files on host systems, if desired. New environment variable `EXTRA_GROUPS` [#234](https://github.com/pSpitzner/beets-flask/issues/234)
 - The inbox info button now has a description of all actions [#145](https://github.com/pSpitzner/beets-flask/issues/145)
 - Subpage for version information and configs. You can access it via the version number in the navbar. [#205](https://github.com/pSpitzner/beets-flask/issues/205)
 - New config option `gui.inbox.debounce_before_autotag` to configure how many seconds to wait after the last filesystem event before starting autotagging. Same debounce applies to all inboxes. [#222](https://github.com/pSpitzner/beets-flask/issues/222)
-- The library view on mobile now has a button to collapse the overview (above the tabs). This allows for more space when browsing the library on small screens. 
+- The library view on mobile now has a button to collapse the overview (above the tabs). This allows for more space when browsing the library on small screens.
 
 ### Other (dev)
 

docker/Dockerfile

@@ -103,23 +103,10 @@ WORKDIR /repo
 USER root
 ENTRYPOINT [ \
     "/bin/sh", "-c", \
-    "./docker/entrypoints/entrypoint_fix_permissions.sh && \ 
+    "./docker/entrypoints/entrypoint_fix_permissions.sh && \
     su beetle -c ./docker/entrypoints/entrypoint_dev.sh" \
     ]
 
-# ------------------------------------------------------------------------------------ #
-#                                        Testing                                       #
-# ------------------------------------------------------------------------------------ #
-
-FROM deps AS test
-
-WORKDIR /repo
-COPY --from=deps --chown=beetle:beetle /repo /repo
-COPY entrypoint_test.sh .
-ENV IB_SERVER_CONFIG="test"
-USER root
-ENTRYPOINT ["./entrypoint_test.sh"]
-
 # ------------------------------------------------------------------------------------ #
 #                                         Build                                        #
 # ------------------------------------------------------------------------------------ #
@@ -163,10 +150,7 @@ ENV IB_SERVER_CONFIG="prod"
 WORKDIR /repo
 COPY --from=build /repo/frontend/dist /repo/frontend/dist
 COPY --from=build /version /version
-COPY docker/entrypoints/entrypoint.sh .
-COPY docker/entrypoints/entrypoint_user_scripts.sh .
-COPY docker/entrypoints/entrypoint_fix_permissions.sh .
-COPY docker/entrypoints/common.sh .
+COPY docker/entrypoints .
 RUN chown -R beetle:beetle /repo
 
 USER root

docker/docker-compose.yaml

@@ -10,6 +10,9 @@ services:
             # 502 is default on macos, 1000 on linux
             USER_ID: 1000
             GROUP_ID: 1000
+            # Optional: Add extra groups to the beetle user for file permissions
+            # Format: "group_name1:gid1,group_name2:gid2"
+            # Example: EXTRA_GROUPS: "nas_shares:1001,media:1002"
         volumes:
             - /wherever/config/:/config
             # for music folders, match paths inside and out of container!

docker/entrypoints/common.sh

@@ -8,6 +8,10 @@ log_error() {
     echo -e "\033[0;31m[Entrypoint] $1\033[0m"
 }
 
+log_warning() {
+    echo -e "\033[0;33m[Entrypoint] $1\033[0m"
+}
+
 log_current_user() {
     log "Running as '$(whoami)' with UID $(id -u) and GID $(id -g)"
     log "Current working directory: $(pwd)"
@@ -26,7 +30,7 @@ get_version_info() {
     else
         export BACKEND_VERSION="unk"
     fi
-
+    
     if [ -f /version/frontend.txt ]; then
         export FRONTEND_VERSION=$(cat /version/frontend.txt)
     else
@@ -35,4 +39,4 @@ get_version_info() {
 }
 
 # Populate the environment variables for the version info
-get_version_info
+get_version_info

docker/entrypoints/entrypoint_add_groups.sh

@@ -0,0 +1,65 @@
+
+# this script runs both, in dev and in prod, so we have to check where we
+# can source common.sh from.
+if [ -f ./common.sh ]; then
+    source ./common.sh
+elif [ -f ./docker/entrypoints/common.sh ]; then
+    source ./docker/entrypoints/common.sh
+fi
+
+
+# ---------------------------------- Helper ---------------------------------- #
+
+validate_and_add_groups() {
+    local group_specs
+    IFS=',' read -ra group_specs <<< "$1"
+
+    for spec in "${group_specs[@]}"; do
+        if [[ "$spec" =~ ^([a-z][a-z0-9_-]*):([0-9]+)$ ]]; then
+            local group_name="${BASH_REMATCH[1]}"
+            local gid="${BASH_REMATCH[2]}"
+
+            process_group "$group_name" "$gid" || continue
+        else
+            log_warning "Invalid group specification '$spec', skipping. Format should be 'group_name:gid' where group_name starts with lowercase letter"
+        fi
+    done
+}
+
+process_group() {
+    local group_name="$1"
+    local gid="$2"
+
+    # Handle existing group
+    if existing_group=$(getent group "$group_name" 2>/dev/null); then
+        local existing_gid=$(cut -d: -f3 <<< "$existing_group")
+        [[ "$existing_gid" != "$gid" ]] && \
+            log_warning "Group '$group_name' exists with GID $existing_gid (expected $gid). Using existing group."
+        log "Group '$group_name' already exists, skipping creation"
+    else
+        addgroup -g "$gid" "$group_name" 2>/dev/null || {
+            log_warning "Failed to create group '$group_name' with gid $gid"
+            return 1
+        }
+        log "Created group '$group_name' with gid $gid"
+    fi
+
+    # Add user to group
+    if id -nG beetle 2>/dev/null | grep -qw "$group_name"; then
+        log "User beetle is already a member of group '$group_name'"
+    else
+        adduser beetle "$group_name" 2>/dev/null || {
+            log_warning "Failed to add beetle user to group '$group_name'"
+            return 1
+        }
+        log "Added beetle user to group '$group_name'"
+    fi
+}
+
+# --------------------------------- Main Loop -------------------------------- #
+
+if [[ -n "$EXTRA_GROUPS" ]]; then
+    log "Adding extra groups to beetle user: $EXTRA_GROUPS"
+    validate_and_add_groups "$EXTRA_GROUPS"
+fi
+

docker/entrypoints/entrypoint_fix_permissions.sh

@@ -1,9 +1,30 @@
-#!/bin/sh
+#!/bin/bash
+
+# this script runs both, in dev and in prod, so we have to check where we
+# can source common.sh from.
+if [ -f ./common.sh ]; then
+    source ./common.sh
+elif [ -f ./docker/entrypoints/common.sh ]; then
+    source ./docker/entrypoints/common.sh
+fi
 
 if [ ! -z "$USER_ID" ] && [ ! -z "$GROUP_ID" ]; then
+    log "Fixing permissions as '$(whoami)' with UID $(id -u) and GID $(id -g)"
+    log "Setting beetle user to $USER_ID:$GROUP_ID"
     groupmod -g $GROUP_ID beetle
     usermod -u $USER_ID -g $GROUP_ID beetle > /dev/null 2>&1
-    chown -R beetle:beetle /home/beetle
-    chown -R beetle:beetle /repo
-    chown -R beetle:beetle /logs
+    log "User beetle now has $(id beetle)"
+    find /home/beetle ! -user beetle -exec chown beetle:beetle {} +
+    find /logs ! -user beetle -exec chown beetle:beetle {} +
+    find /repo ! -user beetle -exec chown beetle:beetle {} +
+    log "Done fixing permissions"
+else
+    log "No USER_ID and GROUP_ID set, skipping permission updates"
+fi
+
+# add groups
+if [ -f ./entrypoint_add_groups.sh ]; then
+    source ./entrypoint_add_groups.sh
+elif [ -f ./docker/entrypoints/entrypoint_add_groups.sh ]; then
+    source ./docker/entrypoints/entrypoint_add_groups.sh
 fi

docs/configuration.md

@@ -154,3 +154,43 @@ You can use multiple workers to fetch candidates before importing (previewing).
 However, the import itself is always done sequentially.
 This is to ensure that the import process is not interrupted by other operations.
 ```
+
+## Docker Environment Variables
+
+These environment variables are set in the `docker-compose.yaml` file and control the container's behavior.
+
+### `USER_ID` and `GROUP_ID`
+
+The `USER_ID` and `GROUP_ID` environment variables are used to set the UID and GID of the `beetle` user inside the container. This is useful to match the user and group IDs of the host system. The default value is `1000` for both.
+
+```yaml
+environment:
+    USER_ID: 1000
+    GROUP_ID: 1000
+```
+
+### `EXTRA_GROUPS`
+
+The `EXTRA_GROUPS` environment variable allows you to add additional groups to the `beetle` user. This is useful when you need the container to have access to files owned by different groups on the host system.
+
+The format is a comma-separated list of `group_name:gid` pairs:
+
+```yaml
+environment:
+    EXTRA_GROUPS: "nas_shares:1001,media:1002"
+```
+
+This is particularly useful in scenarios where:
+- Files in the inbox are created by external services running as different users/groups
+- You're using ACL-based permissions with specific group access
+- You're running in environments like LXC/Proxmox with mapped group IDs
+- You need the container to manage files from network shares with specific group ownership
+
+Example: If your download client (e.g., slskd, transmission) creates files with group ownership `nas_shares` (gid 1001), you can add that group to the beetle user:
+
+```yaml
+environment:
+    EXTRA_GROUPS: "nas_shares:1001"
+```
+
+This will allow the beets-flask container to delete and manage those files via the web UI.