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#!/usr/bin/env sh
USAGE="ssync-index [options] ROOT_DIR
OPTIONS
-b index basename only
-k KEY_FILE (optional: if indexing local)
ssh-key file to use (needs to be non-interactive)
optional: will use default session key
or key set in ssh_config for HOST
-o OUTPUT_FILE
-r REMOTE_HOST (optional)
remote host to index from such as user@hostname
username can be omitted if identical to $USER
or if set in ssh_config
-v verbose logging
-w NUM_SECONDS
index all files newer than NOW - NUM_SECONDS
-h print this message"
# HELPER METHODS
function verbose_log {
if [ ! -z "$VERBOSE_FLAG" ]; then
echo "$1"
fi
}
function lines {
wc -l $1 | cut -d' ' -f1
}
# GLOBAL VALUES
BASENAME_ONLY_FLAG=
KEY_FILE_FLAG=
KEY_FILE_ARG=
OUTPUT_FILE_FLAG=
OUTPUT_FILE_ARG=
REMOTE_HOST_FLAG=
REMOTE_HOST_ARG=
WINDOW_FLAG=
WINDOW_ARG=
VERBOSE_FLAG=
# OPTIONS PARSING
while getopts "hvbr:k:o:w:" opt; do
case "${opt}" in
h) echo "$USAGE"
exit 1
;;
b) BASENAME_ONLY_FLAG=1
;;
k) KEY_FILE_FLAG=1
KEY_FILE_ARG="$OPTARG"
;;
o) OUTPUT_FILE_FLAG=1
OUTPUT_FILE_ARG="$OPTARG"
;;
r) REMOTE_HOST_FLAG=1
REMOTE_HOST_ARG="$OPTARG"
;;
v) VERBOSE_FLAG=1
;;
w) WINDOW_FLAG=1
WINDOW_ARG="$OPTARG"
;;
esac
done
shift $(($OPTIND -1))
if [ $# -ne 1 ]; then
echo "$USAGE"
exit 1
fi
# ROOT_DIR validation
ROOT_DIR=$1
if [ -z "$ROOT_DIR" ]; then
echo "ROOT_DIR is missing."
exit 1
fi
if [ -z "$REMOTE_HOST_ARG" ]; then
# local so check if directory exists
if [ ! -d "$ROOT_DIR" ]; then
echo "$ROOT_DIR does not exist."
exit 1
fi
fi
# Option Validation
output_to=
if [ ! -z "$OUTPUT_FILE_FLAG" ]; then
output_to="> $OUTPUT_FILE_ARG"
fi
keyfile_cmd=""
if [ ! -z "$KEY_FILE_FLAG" ]; then
if [ -f "$KEY_FILE_ARG" ]; then
echo "Identity file '$KEY_FILE_ARG' does not exist"
exit 1
fi
keyfile_cmd="-i $KEY_FILE_ARG"
fi
windowing_flag=""
if [ ! -z "$WINDOW_FLAG" ]; then
if [ "$WINDOW_ARG" -gt 0 ]; then
newermt=$(date -d "$WINDOW_ARG seconds ago" -u -Is)
windowing_flag="-newermt $newermt"
verbose_log "Targetting files from $WINDOW_ARG seconds ago: $newermt"
else
echo "Invalid window value: $WINDOW_ARG"
exit 1
fi
fi
index_value_cmd=
if [ ! -z "$BASENAME_ONLY_FLAG" ]; then
index_value_cmd="basename {}"
else
index_value_cmd="realpath {}"
fi
if [ -z "$REMOTE_HOST_FLAG" ]; then
verbose_log "Generate local index from ${ROOT_DIR} to ${OUTPUT_FILE_ARG}"
find ${ROOT_DIR} -type f ${windowing_flag} -exec ${index_value_cmd} \; > $OUTPUT_FILE_ARG
verbose_log "Indexed $(lines $OUTPUT_FILE_ARG) local files"
else
verbose_log "Generate remote index from $REMOTE_HOST_ARG:${ROOT_DIR} to ${OUTPUT_FILE_ARG}"
ssh $keyfile_cmd $REMOTE_HOST_ARG \
"find ${ROOT_DIR} -type f ${windowing_flag} -exec ${index_value_cmd} \;" > $OUTPUT_FILE_ARG
verbose_log "Indexed $(lines $OUTPUT_FILE_ARG) local files"
fi
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