cgit-clean-cache.sh

#!/bin/bash
# Don't bother with anything smaller than 1MB in size
MINSIZE="1M"
# Clean up any cache files older than 1 week, regardless of size
MAXAGE="7"

# In a multisite case, avoid running all cleaners at once
if [ "$2" != '--now' ]; then
  sleep $(((RANDOM % 60)))
fi

CGITRC=$1
if [ -z "$CGITRC" ]; then
  CGITRC="/etc/cgitrc"
fi

CACHE_ROOT=$(grep '^cache-root=' $CGITRC | cut -d= -f2 2>/dev/null)
SNAPSHOT_TTL=$(grep '^cache-snapshot-ttl=' $CGITRC | cut -d= -f2 2>/dev/null)
STATIC_TTL=$(grep '^cache-static-ttl=' $CGITRC | cut -d= -f2 2>/dev/null)

if [ -z "$CACHE_ROOT" ]; then
  CACHE_ROOT="/var/cache/cgit"
fi
if [ -z "$SNAPSHOT_TTL" ]; then
  SNAPSHOT_TTL="10"
fi

for CACHEFILE in $(find $CACHE_ROOT -type f -size +$MINSIZE -mmin +$SNAPSHOT_TTL); do
  if head -n1 $CACHEFILE | grep -q '/snapshot/'; then
    rm -f $CACHEFILE
  fi
done
if [ ! -z "$STATIC_TTL" ]; then
  for CACHEFILE in $(find $CACHE_ROOT -type f -size +$MINSIZE -mmin +$STATIC_TTL); do
    if head -n1 $CACHEFILE | grep -q 'id='; then
      rm -f $CACHEFILE
    fi
  done
fi
find $CACHE_ROOT -type f -mtime +$MAXAGE -delete