#!/bin/bash

INST="$1"
if [ -z "$1" ]; then
  echo "Usage: $0 <gitolite-instance>"
  exit 1
fi

REPOS_D="{{ gitolite_base_path }}/$INST/repositories"
if [ ! -d "$REPOS_D" ]; then
  echo "instance $INST not found."
  exit 2
fi

repos=$(find $REPOS_D -type d -name '*.git')

declare -A results
for repo in $repos; do
  echo "*** $repo ***"
  git --bare --git-dir "$repo" fsck --full --strict --root
  results[$repo]=$?
  echo ""
done

if [ -d "/var/lib/prometheus-node-exporter/textfile-collector/" ]; then
  echo "reporting results to prometheus"
  {
  echo "# HELP git_fsck_run Last time git-fsck has been run."
  echo "# TYPE git_fsck_run gauge"
  echo "git_fsck_run{gitolite_instance=\"$INST\"} $(date +"%s")"
  echo ""
  echo "# HELP git_fsck_failed Result of git-fsck (0 means OK)."
  echo "# TYPE git_fsck_failed gauge"
  for repo in "${!results[@]}"; do
    repo_name=$(realpath --relative-to "$REPOS_D" "$repo")
    echo "git_fsck_failed{repository=\"$repo_name\",gitolite_instance=\"$INST\"} ${results[$repo]}"
  done
  } | sponge "/var/lib/prometheus-node-exporter/textfile-collector/git-fsck-$INST.prom"
fi