125 lines
2.3 KiB
Bash
Executable File
125 lines
2.3 KiB
Bash
Executable File
#!/bin/bash -e
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# Parse CLI and set options
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repoFile="$(dirname "$0")/repos"
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dryRun=''
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varDir=/var/lib/bup-backup-trigger
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triggerFile="$varDir/trigger"
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lockFile="$varDir/lock"
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log="/var/log/bup-sync.log"
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mkdir -p "$varDir"
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while [ $# -gt 0 ]
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do
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case "$1" in
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--repos|-r)
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repoFile="$2"
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shift
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;;
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--dry|--dry-run|-d)
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dryRun=y
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;;
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--lock)
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touch "$lockFile"
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exit 0
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;;
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--unlock)
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rm -f "$lockFile"
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exit 0
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;;
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--log)
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log="$2"
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shift
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;;
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*)
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echo "Cannot understand parameter \"$1\". Aborting." >&2
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exit 1
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;;
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esac
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shift
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done
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if [ "$log" != '-' ]
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then
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exec >> "$log"
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fi
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# Do some safety checks
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if [ ! -r "$repoFile" ]
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then
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echo "Cannot read the file $repoFile. Exiting" >&2
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exit 1
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fi
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if [ -f "$lockFile" ]
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then
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echo "The lock file exists. Skipping for now ($(date))"
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exit 0
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fi
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# Define the needed functions
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getNextDate() {
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python << EOF
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import datetime
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now = datetime.date.today()
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weekday = now.weekday()
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oneDay = datetime.timedelta(days=1)
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mondayThisWeek = now - oneDay * weekday
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mondayNextWeek = mondayThisWeek + oneDay * 7
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dt = datetime.datetime.fromisoformat(mondayNextWeek.isoformat())
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dt = dt.replace(hour=4, minute=45)
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print(int(dt.astimezone(datetime.timezone.utc).timestamp()))
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EOF
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}
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updateTriggerFile() {
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getNextDate > "$triggerFile"
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}
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triggerLiesInPast() {
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if [ ! -f "$triggerFile" ]
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then
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return 0
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fi
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local now=$(date +%s)
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local triggered=$(cat "$triggerFile")
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if [ $now -gt "$triggered" ]
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then
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return 0
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else
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return 1
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fi
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}
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if ! triggerLiesInPast
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then
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echo "The timestamp in the trigger event lies in the future. Waiting further."
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exit 0
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fi
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echo "The backup script is triggered."
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while read line
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do
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echo "Processing line $line"
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if [ -n "$dryRun" ]
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then
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echo "Shipping to call script $line as in dry mode."
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else
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$line
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fi
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done <<< $(cat "$repoFile" | grep -v '^#' | sed '/^\W*$/d')
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if [ -n "$dryRun" ]
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then
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echo "Not updating the trigger timestamp. The value would be $(getNextDate)."
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else
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updateTriggerFile
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fi
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