xfnw/alpine-make-vm-image
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Add support for downloading apk-tools if not available on host

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This commit is contained in:
Jakub Jirutka 2017-10-11 19:48:03 +02:00
parent fa87e36f9c
commit b71a6e448b
2 changed files with 37 additions and 4 deletions
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5
README.adoc
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@ -13,10 +13,9 @@ This project provides script for making customizable Alpine Linux disk image for
== Requirements
* Alpine Linux (you can use https://github.com/alpinelinux/alpine-chroot-install[alpine-chroot-install] to easily install Alpine on any Linux system)
* POSIX-sh compatible shell (e.g. Busybox ash, dash, Bash, ZSH)
* qemu-img and qemu-nbd (automatically installed by the script)
* e2fsprogs (for ext4), btrfs-progs (for Btrfs), or xfsprogs (for XFS) (automatically installed by the script)
* qemu-img and qemu-nbd (automatically installed by the script if running on Alpine)
* e2fsprogs (for ext4), btrfs-progs (for Btrfs), or xfsprogs (for XFS) (automatically installed by the script if running on Alpine)
== Usage

36
alpine-make-vm-image
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@ -7,7 +7,8 @@
# If running on Alpine system (detected by file /etc/alpine-release), then it
# also installs needed packages on the host system. On other systems you must
# install them yourself: qemu-img, qemu-nbd, and mkfs utility for the chosen
# ROOTFS.
# ROOTFS. If $APK is not available on the host system, then static apk-tools
# specified by $APK_TOOLS_URI is downloaded and used.
#
# Note that it does not create any partitions (it's really not needed),
# filesystem is created directly on the image.
@ -58,6 +59,12 @@
# APK_OPTS Options to pass into apk on each execution.
# Default is "--no-progress".
#
# APK_TOOLS_URI URL of static apk-tools tarball to download if $APK is
# not found on the host system. Default is x86_64 apk-tools
# from https://github.com/alpinelinux/apk-tools/releases.
#
# APK_TOOLS_SHA256 SHA-256 checksum of $APK_TOOLS_URI.
#
# Each option can be also provided by environment variable. If both option and
# variable is specified and the option accepts only one argument, then the
# option takes precedence.
@ -70,6 +77,9 @@ readonly PROGNAME='alpine-make-vm-image'
readonly VERSION='0.1.0'
readonly VIRTUAL_PKG=".make-$PROGNAME"
: ${APK_TOOLS_URI:="https://github.com/alpinelinux/apk-tools/releases/download/v2.8.0/apk-tools-2.8.0-x86_64-linux.tar.gz"}
: ${APK_TOOLS_SHA256:="da21cefd2121e3a6cd4e8742b38118b2a1132aad7f707646ee946a6b32ee6df9"}
: ${APK:="apk"}
: ${APK_OPTS:="--no-progress"}
@ -94,6 +104,9 @@ cleanup() {
trap '' EXIT HUP INT TERM # unset trap to avoid loop
cd /
if [ -d "$temp_dir" ]; then
rm -Rf "$temp_dir" || :
fi
if [ -n "$mount_dir" ]; then
umount_recursively "$mount_dir" \
|| die "Failed to unmount $mount_dir; unmount it and disconnect $nbd_dev manually"
@ -231,6 +244,16 @@ umount_recursively() {
| xargs umount -rn
}
wgets() (
local url="$1"
local sha256="$2"
local dest="${3:-.}"
cd "$dest" \
&& wget -T 10 --no-verbose "$url" \
&& echo "$sha256 ${url##*/}" | sha256sum -c
)
#============================= M a i n ==============================#
@ -292,6 +315,17 @@ if [ "$INSTALL_HOST_PKGS" = yes ]; then
install_fs_tools "$ROOTFS"
fi
#-----------------------------------------------------------------------
temp_dir=''
if ! command -v "$APK" >/dev/null; then
einfo "$APK not found, downloading static apk-tools"
temp_dir="$(mktemp -d /tmp/$PROGNAME.XXXXXX)"
wgets "$APK_TOOLS_URI" "$APK_TOOLS_SHA256" "$temp_dir"
tar -C "$temp_dir" -xzf "$temp_dir/${APK_TOOLS_URI##*/}"
APK="$(ls "$temp_dir"/apk-tools-*/apk)"
fi
#-----------------------------------------------------------------------
if [ ! -f "$IMAGE_FILE" ]; then
einfo "Creating $IMAGE_FORMAT image of size $IMAGE_SIZE"