└── edge
    ├── Dockerfile
    ├── build.sh
    ├── mkimage-alpine.sh
    └── rootfs.tar


/edge/Dockerfile:
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1 | FROM scratch
2 | ADD rootfs.tar /
3 | CMD ["/bin/sh"]
4 | 


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/edge/build.sh:
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1 | #!/bin/sh
2 | 
3 | set -xe
4 | 
5 | #wget -qO mkimage-alpine.sh https://github.com/docker/docker/raw/master/contrib/mkimage-alpine.sh && chmod +x mkimage-alpine.sh
6 | 
7 | ARCH=armhf sh -x ./mkimage-alpine.sh
8 | 


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/edge/mkimage-alpine.sh:
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 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]\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 $REPO/$ARCH/APKINDEX.tar.gz | tar -Oxz |
23 | 		grep '^P:apk-tools-static$' -A1 | tail -n1 | cut -d: -f2
24 | }
25 | 
26 | getapk() {
27 | 	curl -sSL $REPO/$ARCH/apk-tools-static-$(apkv).apk |
28 | 		tar -xz -C $TMP sbin/apk.static
29 | }
30 | 
31 | mkbase() {
32 | 	$TMP/sbin/apk.static --repository $REPO --update-cache --allow-untrusted \
33 | 		--root $ROOTFS --initdb add alpine-base
34 | }
35 | 
36 | conf() {
37 | 	printf '%s\n' $REPO > $ROOTFS/etc/apk/repositories
38 | }
39 | 
40 | pack() {
41 | 	local id
42 | 	tar --numeric-owner -C $ROOTFS -c . > rootfs.tar
43 | 	
44 | 	id=$(cat rootfs.tar | docker import - alpine:$REL)
45 | 	docker tag $id alpine:latest
46 | 	docker run -i -t 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:s" opt; do
56 | 	case $opt in
57 | 		r)
58 | 			REL=$OPTARG
59 | 			;;
60 | 		m)
61 | 			MIRROR=$OPTARG
62 | 			;;
63 | 		s)
64 | 			SAVE=1
65 | 			;;
66 | 		*)
67 | 			usage
68 | 			;;
69 | 	esac
70 | done
71 | 
72 | REL=${REL:-edge}
73 | MIRROR=${MIRROR:-http://nl.alpinelinux.org/alpine}
74 | SAVE=${SAVE:-0}
75 | REPO=$MIRROR/$REL/main
76 | ARCH=${ARCH:-$(uname -m)}
77 | 
78 | tmp
79 | getapk
80 | mkbase
81 | conf
82 | pack
83 | save
84 | 


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/edge/rootfs.tar:
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https://raw.githubusercontent.com/armbuild/alpine/3af29fce1100a58d445e0a85aaeb86328db9766a/edge/rootfs.tar


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