env/bin/fetch.sh

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#!/bin/sh
# fetch
# Written in 2019-2020 by Lucas
# CC0 1.0 Universal/Public domain - No rights reserved
#
# To the extent possible under law, the author(s) have dedicated all
# copyright and related and neighboring rights to this software to the
# public domain worldwide. This software is distributed without any
# warranty. You should have received a copy of the CC0 Public Domain
# Dedication along with this software. If not, see
# <http://creativecommons.org/publicdomain/zero/1.0/>.
usage()
{
printf "Usage: %s [-T] URL [URL ...]\n" "${0##*/}" >&2
exit 1
}
fetch_cmd()
{
if tty=$(tty) && [ "$tty" != "not a tty" ]; then
$torsocks ftp "$@" >"$tty"
else
$torsocks ftp "$@"
fi
}
find_dir()
{
find "$ARCHIVE_BASEDIR" -type d -name "$1"
}
torsocks=torsocks
while getopts T flag; do
case $flag in
T) torsocks=
;;
*) usage
;;
esac
done
shift $(($OPTIND - 1))
[ $# -gt 0 ] || usage
: ${ARCHIVE_BASEDIR:=~/tmp/archive}
mkdir -p "$ARCHIVE_BASEDIR"
everything=$ARCHIVE_BASEDIR/everything
test -f "$everything" || touch "$everything"
dir=$ARCHIVE_BASEDIR/$(date +%Y/%m/%d)
mkdir -p "$dir" || exit 1
rc=0
for url; do
sha=$(printf "%s" "$url" | sha256)
outdir=$dir/$sha
if grep -q "^$url\$" "$everything"; then
printf "%s: \"%s\" already fetched.\n" "${0##*/}" "$url" >&2
printf "%s/file\n" "$(find_dir "$sha")"
continue
fi
mkdir -p "$outdir"
{
fetch_cmd -o "$outdir/file" "$url" \
&& printf "%s\n" "$url" >"$outdir/url" \
&& printf "%s\n" "$name" >"$outdir/name" \
&& printf "%s\n" "$url" >>"$everything" \
&& printf "%s\n" "$outdir/file"
} || rc=1
done
exit $rc