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|
#! /bin/bash
# fetch-basefile, fetch a basefile via ftp or http using classes
#
# (c) Thomas Lange, 2011-2022
#
# Try to download a file CLASSNAME.tar.gz (or tgz, or tar.xz,...) from an URL
# CLASSNAME must match a FAI class
# The URL must provide a (directory) listing of all files available for
# download
# e.g.: FAI_BASEFILEURL=https://fai-project.org/download/basefiles/
#
# variables needed: $classes, $FAI, $FAI_BASEFILEURL
mount_ramdisk() {
# put ramdisk on config space and download file
mount -t tmpfs tmpfs $FAI/basefiles # this makes files from NFS invisible
if [ $? -eq 1 ]; then
echo "mount ramdisk onto $FAI/basefiles failed." >&2
exit 3
fi
}
[ X$FAI_BASEFILEURL = X ] && exit 0
url=$FAI_BASEFILEURL
[ X$verbose = X1 ] && echo "Fetching basefile from $url"
error=0
found=0
mount=0
declare -a baselist
while getopts m opt ; do
case "$opt" in
m) mount=1 ;;
esac
done
#shift $((OPTIND - 1))
# get list of *.tar* files at URL
flist=$(lftp -e "connect $url ;cls -1 *.tar*;exit" 2>/dev/null)
# create an array of all lines
baselist=($flist)
# reverse order of classes
for c in $classes; do
revclasses="$c $revclasses"
done
# now search for each class, if a basename matches
for c in $revclasses; do
for f in "${baselist[@]}"; do
base=${f%%.tar*}
if [ "$c" = "$base" ]; then
found=1
[ $mount = 1 ] && mount_ramdisk
# Create folder in case it is not part of the configuration space
mkdir -p $FAI/basefiles || echo "Could not create folder $FAI/basefiles" >&2
cd $FAI/basefiles || exit 3
if [ -f $f ]; then
echo "$f already exists" >&2
error=1
break 2
fi
echo "Downloading $url/$f"
curl -s $url/$f > $f
error=$?
break 2
fi
done
done
if [ X$found = X0 ]; then
echo "No basefile matching a class name was found at $url" >&2
fi
exit $error
# the rest is done by task extrbase using ftar
|
