#!/bin/bash

# Exit if no Prometheus Pushgateway URL is defined
[ -z "$PROM_URL" ] && exit

# Get latest backup status as json
json=`borg info --last 1 --json`

# Parse json in the Prometheus exposition formatand and transmit
cat <<EOF | curl --data-binary @- $PROM_URL
# TYPE borg_run_duration_seconds gauge
# HELP borg_run_duration_seconds duration between start and end
`echo -n 'borg_run_duration_seconds ' && \
echo $json | grep -o '"duration": [0-9]*' | grep -o '[0-9]*'`

# TYPE borg_run_size_deduplicated_bytes gauge
# HELP borg_run_size_deduplicated_bytes deduplicated size of the last run
`echo -n 'borg_run_size_deduplicated_bytes ' && \
echo $json | grep -o '"compressed_size": [0-9]*' | grep -o '[0-9]*'`

# TYPE borg_run_size_original_bytes gauge
# HELP borg_run_size_original_bytes original size of the last run
`echo -n 'borg_run_size_original_bytes ' && \
echo $json | grep -o '"original_size": [0-9]*' | grep -o '[0-9]*'`

# TYPE borg_cache_chunks_size_total_compressed_bytes gauge
# HELP borg_cache_chunks_size_total_compressed_bytes total size of all chunks
`echo -n 'borg_cache_chunks_size_total_compressed_bytes ' && \
echo $json | grep -o '"unique_csize": [0-9]*' | grep -o '[0-9]*'`
EOF