switch-repos

#!/bin/bash
################################################################################

ROOT=`readlink -f "$1"`
shift
REPOs=( $* )

# Check number of arguments
[[ -z "$ROOT" ]] && echo "No repo root specified" && exit 1
[[ -z "${REPOs[@]}" ]] && echo "No repos specified" && exit 1

 TIMEOUT="/usr/bin/timeout"
  LOGGER="/usr/bin/logger -t 'snapshot-swapper-ng'"
    GREP="/bin/grep"
      PS="/bin/ps"
      MV="mv"

# Constants
FG_SUF="_fg"
BG_SUF="_bg"
TOBG_SUF="_to_bg"

BINROOT=$(dirname `readlink -f "$0"`)
DEBUG="yes"

# Includes
. $BINROOT/util/msgs.sh

################################################################################
for repo in "${REPOs[@]}"; do
    repopath="$ROOT/$repo"
    repo_fg="$repopath/${repo}${FG_SUF}"
    repo_bg="$repopath/${repo}${BG_SUF}"
    repo_tobg="$repopath/${repo}${TOBG_SUF}"

    #info "Checking for unclean shutdown of $repo"
    if [[ -e "$repo_tobg" ]]; then
	    debug "Found dirty '$repo_tobg'"

        if [[ ! -e "$repo_bg" ]]; then
            info "Renaming orphaned $repo_tobg to $repo_bg"
            $MV "$repo_tobg" "$repo_bg"
        elif [[ ! -e "$repo_fg" ]]; then
            info "Renaming orphaned $repo_tobg to $repo_fg"
            $MV "$repo_tobg" "$repo_fg"
        fi
    fi

    #info "Checking for bg/fg $repo repos"
    [[ -e "$repo_fg" ]] || fatal "'$repo_fg' not found"
    [[ -e "$repo_bg" ]] || fatal "'$repo_bg' not found"
    
    #info "Switching bg/fg $repo repos"
    if ! (mv "$repo_fg"   "$repo_tobg" && \
    mv "$repo_bg"   "$repo_fg" && \
    mv "$repo_tobg" "$repo_bg"); then
        error "Failed to switch repos '$repo_fg' and '$repo_bg'"
        continue
    fi
done

if [ ! -z "$errors" ]; then
    echo ""
    echo -e "\e[0;31mFollowing errors occured during execution:\e[0m"
    echo -e "$errors"
    exit 1
fi