contrib/mkimage-alpine.sh

   1 #!/bin/sh
   2
   3 set -e
   4
   5 [ $(id -u) -eq 0 ] || {
   6         printf >&2 '%s requires root\n' "$0"
   7         exit 1
   8 }
   9
  10 usage() {
  11         printf >&2 '%s: [-r release] [-m mirror] [-s] [-c additional repository] [-a arch]\n' "$0"
  12         exit 1
  13 }
  14
  15 tmp() {
  16         TMP=$(mktemp -d ${TMPDIR:-/var/tmp}/alpine-docker-XXXXXXXXXX)
  17         ROOTFS=$(mktemp -d ${TMPDIR:-/var/tmp}/alpine-docker-rootfs-XXXXXXXXXX)
  18         trap "rm -rf $TMP $ROOTFS" EXIT TERM INT
  19 }
  20
  21 apkv() {
  22         curl -sSL $MAINREPO/$ARCH/APKINDEX.tar.gz | tar -Oxz |
  23                 grep --text '^P:apk-tools-static$' -A1 | tail -n1 | cut -d: -f2
  24 }
  25
  26 getapk() {
  27         curl -sSL $MAINREPO/$ARCH/apk-tools-static-$(apkv).apk |
  28                 tar -xz -C $TMP sbin/apk.static
  29 }
  30
  31 mkbase() {
  32         $TMP/sbin/apk.static --repository $MAINREPO --update-cache --allow-untrusted \
  33                 --root $ROOTFS --initdb add alpine-base
  34 }
  35
  36 conf() {
  37         printf '%s\n' $MAINREPO > $ROOTFS/etc/apk/repositories
  38         printf '%s\n' $ADDITIONALREPO >> $ROOTFS/etc/apk/repositories
  39 }
  40
  41 pack() {
  42         local id
  43         id=$(tar --numeric-owner -C $ROOTFS -c . | docker import - alpine:$REL)
  44
  45         docker tag $id alpine:latest
  46         docker run -i -t --rm alpine printf 'alpine:%s with id=%s created!\n' $REL $id
  47 }
  48
  49 save() {
  50         [ $SAVE -eq 1 ] || return
  51
  52         tar --numeric-owner -C $ROOTFS -c . | xz > rootfs.tar.xz
  53 }
  54
  55 while getopts "hr:m:sc:a:" opt; do
  56         case $opt in
  57                 r)
  58                         REL=$OPTARG
  59                         ;;
  60                 m)
  61                         MIRROR=$OPTARG
  62                         ;;
  63                 s)
  64                         SAVE=1
  65                         ;;
  66                 c)
  67                         ADDITIONALREPO=$OPTARG
  68                         ;;
  69                 a)
  70                         ARCH=$OPTARG
  71                         ;;
  72                 *)
  73                         usage
  74                         ;;
  75         esac
  76 done
  77
  78 REL=${REL:-edge}
  79 MIRROR=${MIRROR:-http://nl.alpinelinux.org/alpine}
  80 SAVE=${SAVE:-0}
  81 MAINREPO=$MIRROR/$REL/main
  82 ADDITIONALREPO=$MIRROR/$REL/${ADDITIONALREPO:-community}
  83 ARCH=${ARCH:-$(uname -m)}
  84
  85 tmp
  86 getapk
  87 mkbase
  88 conf
  89 pack
  90 save