递归查找并gzip目录，而无需目录/文件测试

Question

I'm working on improving our bash backup script, and would like to move away from rsync and towards using gzip and a "find since last run timestamp" system. I would like to have a mirror of the original tree, except have each destination file gzipped. However, if I pass a destination path to gzip that does not exist, it complains. I created the test below, but I can't believe that this is the most efficient solution. Am I going about this wrong?

Also, I'm not crazy about using while read either, but I can't get the right variable expansion with the alternatives I've tried, such as a for file in 'find' do .

Centos 6.x. Relevant snip below, simplified for focus:

cd /mnt/${sourceboxname}/${drive}/ && eval find . -newer timestamp | while read objresults; 
  do
    if [[ -d "${objresults}" ]]
    then
    mkdir -p /backup/${sourceboxname}/${drive}${objresults}
    else
    cat /mnt/${sourceboxname}/${drive}/"${objresults}" | gzip -fc > /backup/${sourceboxname}/${drive}"${objresults}".gz
    fi
  done
touch timestamp  #if no stderr

Answer 1

With proposed changes from my comments incorporated, I suggest this code:

#!/bin/bash
src="/mnt/$sourceboxname/$drive"
dst="/backup/$sourceboxname/$drive"
timestamp="$src/timestamp"
errors=$({ cd "$src" && find -newer "$timestamp" | while read objresults;
    do
        mkdir -p $(basename "$dst/$objresults")
        [[ -d "$objresults" ]] || gzip -fc < "$objresults" > "$dst/$objresults.gz"
    done; } 2>&1)
if [[ -z "$errors" ]]
then
    touch "$timestamp"
else
    echo "$errors" >&2
    exit 1
fi