empty folder removal does not work due to wrong find command

[seertenedos]

folder cleanup looks like it works from the logs as you can see below but it actuall does not work.

2019-12-01 06:24:50,569 - DEBUG      - path                 - remove_empty_dirs              - Removing empty directories from '/data/main' with mindepth 1
2019-12-01 06:24:50,570 - DEBUG      - path                 - remove_empty_dirs              - Using: find /data/main -mindepth 1 -type d -empty -delete
2019-12-01 06:24:50,585 - INFO       - uploader             - remove_empty_dirs              - Removed empty directories from '/data/main' with mindepth: 1

I logged into the container and ran /data/main -mindepth 1 -type d -empty -delete manually and got an error below

find /data/main -mindepth 1 -type d -empty -delete
find: unrecognized: -empty
BusyBox v1.30.1 (2019-06-12 17:51:55 UTC) multi-call binary.

Usage: find [-HL] [PATH]... [OPTIONS] [ACTIONS]

Search for files and perform actions on them.
First failed action stops processing of current file.
Defaults: PATH is current directory, action is '-print'

        -L,-follow      Follow symlinks
        -H              ...on command line only
        -xdev           Don't descend directories on other filesystems
        -maxdepth N     Descend at most N levels. -maxdepth 0 applies
                        actions to command line arguments only
        -mindepth N     Don't act on first N levels
        -depth          Act on directory *after* traversing it

Actions:
        ( ACTIONS )     Group actions for -o / -a
        ! ACT           Invert ACT's success/failure
        ACT1 [-a] ACT2  If ACT1 fails, stop, else do ACT2
        ACT1 -o ACT2    If ACT1 succeeds, stop, else do ACT2
                        Note: -a has higher priority than -o
        -name PATTERN   Match file name (w/o directory name) to PATTERN
        -iname PATTERN  Case insensitive -name
        -path PATTERN   Match path to PATTERN
        -ipath PATTERN  Case insensitive -path
        -regex PATTERN  Match path to regex PATTERN
        -type X         File type is X (one of: f,d,l,b,c,s,p)
        -executable     File is executable
        -perm MASK      At least one mask bit (+MASK), all bits (-MASK),
                        or exactly MASK bits are set in file's mode
        -mtime DAYS     mtime is greater than (+N), less than (-N),
                        or exactly N days in the past
        -mmin MINS      mtime is greater than (+N), less than (-N),
                        or exactly N minutes in the past
        -newer FILE     mtime is more recent than FILE's
        -inum N         File has inode number N
        -user NAME/ID   File is owned by given user
        -group NAME/ID  File is owned by given group
        -size N[bck]    File size is N (c:bytes,k:kbytes,b:512 bytes(def.))
                        +/-N: file size is bigger/smaller than N
        -links N        Number of links is greater than (+N), less than (-N),
                        or exactly N
        -prune          If current file is directory, don't descend into it
If none of the following actions is specified, -print is assumed
        -print          Print file name
        -print0         Print file name, NUL terminated
        -exec CMD ARG ; Run CMD with all instances of {} replaced by
                        file name. Fails if CMD exits with nonzero
        -exec CMD ARG + Run CMD with {} replaced by list of file names
        -delete         Delete current file/directory. Turns on -depth option
        -quit           Exit

[seertenedos]

i also found a similar post for another container with a similar issue where the following was suggested to fix it.

RUN apk --no-cache add findutils && \
    rm -rf /var/cache/apk/*

[sabrsorensen]

Good find, thanks for taking the time to submit an issue! I have your fix added and a build will be ready shortly.