pleroma/installation/nginx-cache-purge.example

#!/bin/bash

# A simple Bash script to delete an media from the Nginx cache.

SCRIPTNAME=${0##*/}

# NGINX cache directory 
CACHE_DIRECTORY="/tmp/pleroma-media-cache"

function get_cache_files() {
    local max_parallel=${3-16}
    find $2 -maxdepth 1 -type d | xargs -P $max_parallel -n 1 grep -ERl "^KEY:.*$1" | sort -u
}

function purge_item() {
  local cache_files
  cache_files=$(get_cache_files "$1" "$2")

  if [ -n "$cache_files" ]; then
    for i in $cache_files; do
      [ -f $i ] || continue
      echo "Deleting $i from $2."
      rm $i
    done
  else
    echo "$1 is not cached."
  fi  
}

function purge() {
  for url in "$@"
  do
    echo "$SCRIPTNAME delete $url from cache ($CACHE_DIRECTORY)"
    purge_item $url $CACHE_DIRECTORY
  done

}

purge $1