cfg/bin/check_config

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#!/bin/bash
set -euo pipefail
DEBUG=${DEBUG:-false}
FETCH_INTERVAL=${FETCH_INTERVAL:-3600}
REPOS=( public secret )
# Print debug messages if enabled by ${DEBUG}
function debug {
[[ "${DEBUG}" = "false" ]] && return
echo "$@" >&2
}
# Wrap git to work with git-dir and work-tree being in other locations
function gwrap {
hub --git-dir=${HOME}/.cfg/${REPO} --work-tree=${HOME} $@
}
# Ensure we're connected to network before acting
if ! ( ping -q -c 1 8.8.8.8 >/dev/null ); then
debug "No network connection, not checking"
exit 0
fi
# Check repos for updates
for REPO in ${REPOS[@]}; do
if [ $(( $(date +%s) - $(stat -c %Y .cfg/${REPO}/FETCH_HEAD) )) -lt ${FETCH_INTERVAL} ]; then
debug "Last repo fetch for '${REPO}' too new, not checking"
continue
fi
gwrap fetch -q
LOCAL=$(gwrap rev-parse HEAD)
REMOTE=$(gwrap rev-parse FETCH_HEAD)
if ! [[ "${LOCAL}" = "${REMOTE}" ]]; then
echo "Config repo '${REPO}' differs from upstream"
fi
done