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Accept piped data #3

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Accept piped data #3

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33 changes: 33 additions & 0 deletions kubesort
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,33 @@
#uncomment next line for debugging
# set -x

# detect if the script is being piped to
if [[ -p /dev/stdin ]]; then
# save the data from the pipe
PIPED_DATA=$(cat -)
SORT_ARG=$1
fi

# Use this function to sort piped data
sort_pipe () {

# save our header information for later
# this script wouldn't work if --no-headers is used
HEADER=$(echo "$PIPED_DATA" | head -1)
# use the first arg or age by default
SORT_FIELD=${SORT_ARG:-AGE}

# find which column number our sort field is in.
# this should return a column number.
# grep is case insensitive
COLUMN=$(echo "$HEADER" | tr -s ' ' '\n' | nl | grep -i ${SORT_FIELD} | awk '{print $1}')

# echo header separate so `sort` doesn't try to move it
echo "$HEADER"
# echo the rest of our data. sorted and without header row
echo "$PIPED_DATA" |tail -n +2| sort -h -r -k $COLUMN
}

cmd=$4
option3=$4
[ -z "$cmd" ] && cmd="help";
Expand Down Expand Up @@ -67,6 +94,12 @@ EOF
exit
}

# check for piped data. run our function if it's set
if [ -n "${PIPED_DATA}" ]; then
sort_pipe
exit
fi

if [[ "$1" = "kubectl" && "$2" = "get" ]];
then
case "$3" in
Expand Down