adding apk package manager to UDP Pro root device (not unifi-os)

[osterlitz]

Hi @boostchicken , not too sure how/where to add this (maybe a new folder for udm-utilities?)
This is for UniFi OS UDM 1.12.22 (Linux Unifi 4.19.152-al-linux-v10.2.0-v1.12.22.4309-4105ace) and HIGHLY EXPERIMENTAL.

You can use the following commands to add full package manager support on root level, turning the UDM Pro back into a less braindead Linux device. There may be incompatibilities as it's not compiled to be exactly AL 3.1.5, I have not verified more than kernel and busybox version.

curl http://dl-cdn.alpinelinux.org/alpine/v3.15/main/aarch64/apk-tools-static-2.12.7-r3.apk -o /apk-tools-static-2.12.7-r3.apk
tar xvz -C / -f /apk-tools-static-2.12.7-r3.apk sbin/apk.static

/sbin/apk.static --allow-untrusted --initdb -X http://dl-cdn.alpinelinux.org/alpine/v3.15/main add apk-tools-static alpine-keys

cat << EOT > /etc/apk/repositories
#/media/cdrom/apks
http://dl-cdn.alpinelinux.org/alpine/v3.15/main
http://dl-cdn.alpinelinux.org/alpine/v3.15/community
#http://dl-cdn.alpinelinux.org/alpine/edge/main
#http://dl-cdn.alpinelinux.org/alpine/edge/community
#http://dl-cdn.alpinelinux.org/alpine/edge/testing
EOT

/sbin/apk.static update

/sbin/apk.static add apk-tools curl

Best,
Stefan

PS: edited for cleaner code