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#!/bin/sh
## live-build(7) - System Build Scripts
## Copyright (C) 2006-2012 Daniel Baumann <daniel@debian.org>
##
## live-build comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.
Short_date ()
{
SHORT_DATE="${1}:-${LB_SNAPSHOT}}"
# returns the date as YYYYMMDD
echo "${SHORT_DATE}" | cut -c 1-8
}
Last_archive_entry ()
{
# returns the last date link
LAST_ENTRY="$(cat /tmp/index.html | grep "$(date +%Y%m)" | sed 's|.*<a href="\([^"]*\)".*$|\1|' | tail -n 1 )"
echo "$( echo ${LAST_ENTRY} | sed 's|./||' | sed 's|/||' )"
}
First_archive_entry ()
{
# returns the 1st date link (1st line is daily-images in daily installer html)
FIRST_ENTRY="$(cat /tmp/index.html | grep DIR | sed 's|.*<a href="\([^"]*\)".*$|\1|' | head -n 2 | tail -n 1 )"
echo "$( echo ${FIRST_ENTRY} | sed 's|./||' | sed 's|/||' )"
}
Previous_date ()
{
INITIAL_DATE="${1}"
# convert date to seconds
UNIX_TIME=$(date -d "$INITIAL_DATE" +%s)
# one day is 86400 secs
#ONE_DAY=$(( 24 * 3600 ))
ONE_DAY=86400
# subtract one day to date
PREVIOUS_DATE=$(date -d "$INITIAL_DATE -$ONE_DAY sec" "+%Y%m%d")
# return previous date
echo "${PREVIOUS_DATE}"
}
Dated_archive_entry ()
{
# returns the link for a specific date
WANTED_DATE="${1}:-${LB_SNAPSHOT}}"
DATED_ENTRY="$(cat /tmp/index.html | grep "$(Short_date ${WANTED_DATE})" | sed 's|.*<a href="\([^"]*\)".*$|\1|' | tail -n 1 )"
echo "$( echo ${DATED_ENTRY} | sed 's|./||' | sed 's|/||' )"
}
Previous_archive_entry ()
{
# returns the link for the match or the previous entry before specific date
FIRST_DATE="$(Short_date $(First_archive_entry))"
DATE="$(Short_date ${LB_SNAPSHOT})"
# if there is no daily installer available for
# a very old date, then use the oldest daily installer
# available, even with kernel mismatch.
if [ ${DATE} -le ${FIRST_DATE} ]
then
DATE=${FIRST_DATE}
fi
while [ "${DATE}" != "${FIRST_DATE}" ]; do
LINK=$(cat /tmp/index.html | grep "${DATE}" | sed 's|.*<a href="\([^"]*\)".*$|\1|' )
if [ -z "${LINK}" ]
then
# date was not found
# try previous date
DATE=$(Previous_date "${DATE}")
else
# a link was found
break
fi
done
# return link to matched date or previous daily installer date,
# the 1st one if no other younger d-i for that date was found
Dated_archive_entry "${DATE}"
}
Latest_debian_archive_snapshot_available ()
{
# returns the complete date/time for the link of the latest (last) available debian archive snapshot date
wget 'http://snapshot.debian.org/archive/debian/?year='"$(date +%Y)"';month='"$(date +%m)" -O /tmp/index.html && true
LAST_ARCHIVE_SNAPSHOT="$(Last_archive_entry)"
echo "${LAST_ARCHIVE_SNAPSHOT}"
}
Dated_debian_archive_snapshot ()
{
# returns the complete date/time for the link of the latest for a specific date in snapshot.debian.org
DATE_YEAR="$(Short_date ${LB_SNAPSHOT} | cut -c 1-4 )"
DATE_MONTH="$(Short_date ${LB_SNAPSHOT} | cut -c 5-6 )"
wget 'http://snapshot.debian.org/archive/debian/?year='"${DATE_YEAR}"';month='"${DATE_MONTH}" -O /tmp/index.html && true
LAST_ARCHIVE_SNAPSHOT="$(Dated_archive_entry)"
echo "${LAST_ARCHIVE_SNAPSHOT}"
}
Latest_debian_installer_snapshot_available ()
{
# returns the date-hour for the latest date of debian-installer daily build available for an arch
# d-i archive uses different date links
wget 'http://d-i.debian.org/daily-images/'"${LIVE_IMAGE_ARCHITECTURE}" -O /tmp/index.html && true
LAST_INSTALLER_SNAPSHOT="$(Last_archive_entry)"
echo "${LAST_INSTALLER_SNAPSHOT}"
}
Dated_debian_installer_snapshot ()
{
# returns the date-hour for the specific date of debian-installer daily build available for an arch
# d-i archive uses different date links
wget 'http://d-i.debian.org/daily-images/'"${LIVE_IMAGE_ARCHITECTURE}" -O /tmp/index.html && true
DATED_INSTALLER_SNAPSHOT="$(Dated_archive_entry)"
echo "${DATED_INSTALLER_SNAPSHOT}"
}
Available_daily_installer ()
{
# returns the desired daily d-i date link or the previous existing daily d-i
DAILY_INSTALLER="$(Dated_debian_installer_snapshot)"
if [ -z "${DAILY_INSTALLER}" ]
then
# no wanted date was found, download available dates and search previous
wget 'http://d-i.debian.org/daily-images/'"${LIVE_IMAGE_ARCHITECTURE}" -O /tmp/index.html && true
DAILY_INSTALLER=$(Previous_archive_entry)
fi
echo "${DAILY_INSTALLER}"
}
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