From e82af0c4e73824dc5ec4b35d2342c154d9a4ccbc Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 5 Feb 2022 14:13:52 +0100
Subject: build-torrent: completly rearanged code from al32-mktorrent.sh

---
 build-torrent | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100755 build-torrent

diff --git a/build-torrent b/build-torrent
new file mode 100755
index 0000000..b3a842d
--- /dev/null
+++ b/build-torrent
@@ -0,0 +1,146 @@
+#!/bin/bash
+
+# parameters and default values
+CONFIG="releng"
+ARCH="i686"
+DATE=$(date +%Y.%m.%d)
+MIRROR_DIR="/srv/http/mirror/mirror.archlinux32.org"
+TORRENT_SERVER="archlinux32.org"
+TORRENT_USER="hefur"
+HEFUR_DIR="/var/lib/hefurd"
+
+base_dir=$(
+  readlink -e "${0%/*}"
+)
+
+usage() {
+  >&2 echo ""
+  >&2 echo "build-torrent: seed torrents for Archlinux32 ISOs"
+  >&2 echo ""
+  >&2 echo "possible options:"
+  >&2 echo "  -h|--help:       show this help and exit."
+  >&2 echo "  --arch           architecture of the ISO, default is '$ARCH'."
+  >&2 echo "  --date           date of the ISO for, default is '$DATE'."
+  >&2 echo "  --mirror-dir     where are the ISOs stored on the mirror, default is '$MIRROR_DIR'."
+  >&2 echo "  --torrent-server the name of the server hosting torrents with hefurd, default is '$TORRENT_SERVER'."
+  >&2 echo "  --torrent-user   the user hefurd is running as, default is '$TORRENT_USER'."
+  >&2 echo "  --magnet-link    retrieve magnet link of an already published torrent."
+  [ -z "$1" ] && exit 1 || exit "$1"
+}
+
+# fail on first error
+set -e
+
+# cleanup hook
+tmp_dir="$(mktemp -d)"
+cleanup() {
+  if [ "${no_cleanup}" = 0 ]; then  
+    if mountpoint -q "${tmp_dir}"; then
+      sudo umount "${tmp_dir}"
+    fi
+    rm -rf --one-file-system "${tmp_dir}"
+  fi
+}
+trap cleanup EXIT
+
+eval set -- "$(
+  getopt -o h \
+  --long help \
+  --long arch: \
+  --long date: \
+  --long mirror-dir: \
+  --long torrent-server: \
+  --long torrent-user: \
+  --long magnet-link \
+  -n "$(basename "$0")" -- "$@" || \
+  echo usage
+)"
+
+arch="$ARCH"
+date="$DATE"
+mirror_dir="$MIRROR_DIR"
+iso="${iso}"
+torrent_server="$TORRENT_SERVER"
+torrent_user="$TORRENT_USER"
+hefur_dir="$HEFUR_DIR"
+magnet_link=0
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    '--arch')
+      shift
+      arch="$1"
+    ;;
+    '--date')
+      shift
+      date="$1"
+    ;;
+    '--mirror-dir')
+      shift
+      mirror_dir="$1"
+    ;;
+    '--torrent-server')
+      shift
+      torrent_server="$1"
+    ;;
+    '--torrent-user')
+      shift
+      torrent_user="$1"
+    ;;
+    '--magnet-link')
+      magnet_link=1
+    ;;
+    '--help'|'-h')
+      usage 0
+    ;;
+    '--')
+      shift
+      break
+    ;;
+    *)
+      >&2 printf 'Whoops, option "%s" is not yet implemented!\n' "$1" >&2
+      exit 42
+    ;;
+  esac
+  shift
+done
+
+if [ $# -gt 0 ]; then
+  >&2 echo 'Too many arguments.'
+  exit 2
+fi
+
+archiso_dir="$mirror_dir/archisos"
+iso="archlinux32-$date-$arch.iso"
+
+# retrieve the magnet link (for publishing on the webpage)
+if [ $magnet_link = 1 ]; then
+	magnet_link="$(transmission-show --magnet "$archiso_dir/${iso}.torrent")"
+  echo "$magnet_link"
+  exit 0
+fi
+
+declare -a available_mirrors
+mirrorlist="$(cat /etc/pacman.d/mirrorlist32 | grep Server | cut -d '=' -f 2 | sed -e 's/\s//g;s_$arch/$repo_archisos/_')"
+available_mirrors=($mirrorlist)
+
+if [ ! -f "$archiso_dir/${iso}" ] ; then
+  >&2 echo "'${iso}' not found."
+  exit 1
+fi
+
+# create web seed as the list of all mirrors and create the torrent
+# file, announce it on the torrent server
+function join_by { local IFS="$1"; shift; echo "$*"; }
+web_seed="$(join_by ',' "${available_mirrors[@]}")"
+torrent_file="${iso}.torrent"
+
+rm -f "${archiso_dir}/${torrent_file}"
+mktorrent --announce=http://${torrent_server}:6969/announce \
+  --web-seed="${web_seed}" \
+  --output="${archiso_dir}/${torrent_file}" \
+  "${archiso_dir}/${iso}"
+
+scp "${archiso_dir}/${torrent_file}" "${torrent_user}@${torrent_server}:${hefur_dir}"
+
+exit 0
-- 
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