Bump Alpine version to 3.19; minor fixes

Dockerfile

@@ -1,7 +1,7 @@
-FROM alpine:3.13
+FROM alpine:3.19
 
 LABEL maintainer="Matt Titmus <[email protected]>"
-LABEL date="2021-05-19"
+LABEL date="2024-02-19"
 
 ARG DOCKER_VERSION=1.11.1
 

build/executed-by-cron.sh

@@ -4,10 +4,8 @@ echo "[$(date)] Docker GC starting." >> /var/log/cron.log 2>&1
 
 /usr/bin/docker-gc >> /var/log/cron.log 2>&1
 
-if [ "$CLEAN_UP_VOLUMES" -eq "1" ]
-then 
-   if [ $(docker volume ls -qf dangling=true | wc -l) -gt 0 ]
-   then
+if [ "$CLEAN_UP_VOLUMES" == "1" ]; then
+   if [ "$(docker volume ls -qf dangling=true | wc -l)" -gt 0 ]; then
       echo "Cleaning up dangling volumes." >> /var/log/cron.log 2>&1
       docker volume rm $(docker volume ls -qf dangling=true) >> /var/log/cron.log 2>&1
    else

build/generate-crontab.sh

@@ -1,9 +1,8 @@
 #!/bin/bash
 
-DEFAULT_CRON="0 9 * * *"
+DEFAULT_CRON="0 0 * * *"
 
-if [ "$CRON" ]
-then
+if [ "$CRON" ]; then
    echo "Using user-defined CRON variable: $CRON"
 else
    echo "CRON variable undefined. Using default of \"$DEFAULT_CRON\""
@@ -12,48 +11,39 @@ fi
 
 GC_ARGS=""
 
-if [ "$CLEAN_UP_VOLUMES" ]
-then
+if [ "$CLEAN_UP_VOLUMES" ]; then
    GC_ARGS="$GC_ARGS CLEAN_UP_VOLUMES=$CLEAN_UP_VOLUMES"
 fi
 
-if [ "$DRY_RUN" ]
-then
+if [ "$DRY_RUN" ]; then
    GC_ARGS="$GC_ARGS DRY_RUN=$DRY_RUN"
 fi
 
-if [ "$EXCLUDE_VOLUMES_IDS_FILE" ]
-then
+if [ "$EXCLUDE_VOLUMES_IDS_FILE" ]; then
    GC_ARGS="$GC_ARGS EXCLUDE_VOLUMES_IDS_FILE=$EXCLUDE_VOLUMES_IDS_FILE"
 fi
 
-if [ "$FORCE_CONTAINER_REMOVAL" ]
-then
+if [ "$FORCE_CONTAINER_REMOVAL" ]; then
    GC_ARGS="$GC_ARGS FORCE_CONTAINER_REMOVAL=$FORCE_CONTAINER_REMOVAL"
 fi
 
-if [ "$FORCE_IMAGE_REMOVAL" ]
-then
+if [ "$FORCE_IMAGE_REMOVAL" ]; then
    GC_ARGS="$GC_ARGS FORCE_IMAGE_REMOVAL=$FORCE_IMAGE_REMOVAL"
 fi
 
-if [ "$GRACE_PERIOD_SECONDS" ]
-then
+if [ "$GRACE_PERIOD_SECONDS" ]; then
    GC_ARGS="$GC_ARGS GRACE_PERIOD_SECONDS=$GRACE_PERIOD_SECONDS"
 fi
 
-if [ "$MINIMUM_IMAGES_TO_SAVE" ]
-then
+if [ "$MINIMUM_IMAGES_TO_SAVE" ]; then
    GC_ARGS="$GC_ARGS MINIMUM_IMAGES_TO_SAVE=$MINIMUM_IMAGES_TO_SAVE"
 fi
 
-if [ "$REMOVE_VOLUMES" ]
-then
+if [ "$REMOVE_VOLUMES" ]; then
    GC_ARGS="$GC_ARGS REMOVE_VOLUMES=$REMOVE_VOLUMES"
 fi
 
-if [ "$VOLUME_DELETE_ONLY_DRIVER" ]
-then
+if [ "$VOLUME_DELETE_ONLY_DRIVER" ]; then
    GC_ARGS="$GC_ARGS VOLUME_DELETE_ONLY_DRIVER=$VOLUME_DELETE_ONLY_DRIVER"
 fi