kdn

#!/bin/bash
# - kup: download file from pod
#   - example: `kup pod:/path/file.ext`
#   - example: `kup pod:/path/file.ext newfile.ext`
#   - example: `kup pod:/path/file.ext dst/`
#   - example: `kup pod:/path/file.ext dst/newfile.ext`
#   - example: `kup pod:container:/path/file.ext`

if [ -z "$1" ]; then
  kubectl get pod
  exit
fi

resource=${1%:*}
path=${1##*:}
if [ "$resource" == "$1" ]; then path=""; fi

target=${resource%:*}
container=${resource##*:}
if [ "$target" == "$resource" ]; then container=""; fi

pod=`kubectl get pod | grep $target | head -n1 | awk '{print $1}'`

if [ -z "$pod" ]; then
  echo no pod found.
  exit
fi

fn=${2##*/}
dst=${2%/*}

if [ -z "$fn" ]; then fn=`basename $path`; fi
if [ -z "$dst" ]; then dst="."; fi
if [ -n "$dst" ]; then mkdir -p $dst; fi

if [ -n "$container" ]; then
  kubectl cp $pod:$path  -c $container $dst/$fn
else
  kubectl cp $pod:$path $dst/$fn
fi