From b53628564ce58d298f891e003eca1c05ed807ed9 Mon Sep 17 00:00:00 2001
From: Didier Roche <didier.roche@canonical.com>
Date: Thu, 5 Dec 2024 15:05:42 +0100
Subject: [PATCH] Keep a single wsl rootfs upgrade policy

We are removing our different variants of wsl rootfs with the new
Microsoft format. We only keep one following the distribution policy:
- lts to lts
- intermediate release to next one

Co-authored-by: Carlos Nihelton <carlos.santanadeoliveira@canonical.com>
---
 live-build/ubuntu-wsl/hooks/99-tar.binary | 97 -----------------------
 1 file changed, 97 deletions(-)

diff --git a/live-build/ubuntu-wsl/hooks/99-tar.binary b/live-build/ubuntu-wsl/hooks/99-tar.binary
index 56a39246..c28915fe 100755
--- a/live-build/ubuntu-wsl/hooks/99-tar.binary
+++ b/live-build/ubuntu-wsl/hooks/99-tar.binary
@@ -16,102 +16,5 @@ esac
 setfattr -x system.posix_acl_access chroot/var/log/journal
 setfattr -x system.posix_acl_default chroot/var/log/journal
 
-# is_lts returns true if the given release is a LTS.
-is_lts() {
-    release_version="$1"
-    year=$(echo "${release_version}" | cut -d'.' -f1)
-    month=$(echo "${release_version}" | cut -d'.' -f2)
-
-    if [ "${month}" != "04" ]; then
-        echo "false"
-        return
-    fi
-
-    last_year_digit="${year: -1}"
-    if [ $((last_year_digit % 2)) -ne 0 ]; then
-        echo "false"
-        return
-    fi
-
-    echo "true"
-}
-
-# is_current_lts_release returns for a given lts release is we are in the year preceeding or 2 years succeeding a release.
-# Note that it will mark as "current" a lts release zeven if there is a next one released until the end of the +2 year.
-is_current_lts_release() {
-    release_version="$1"
-    current_year="$2"
-    year=$(echo "$release_version" | cut -d'.' -f1)
-
-    if [ $(is_lts "${version}") != "true" ]; then
-        echo "false"
-        return
-    fi
-
-    if [ "$((year - 1))" -le "${current_year}" ] && [ "${current_year}" -le "$((year + 2))" ]; then
-        echo "true"
-        return
-    fi
-
-    echo "false"
-}
-
-# Function to check if a version is a development release
-is_development_release() {
-    local version=$1
-    local current_year=$2
-    local current_month=$3
-    local year=$(echo $version | cut -d. -f1)
-    local month=$(echo $version | cut -d. -f2)
-
-    if [ "${year}" -gt "${current_year}" ] || ([ "${year}" -eq "${current_year}" ] && [ "${month}" -gt "${current_month}" ]); then
-        echo "true"
-        return
-    fi
-
-    echo "false"
-}
-
-# create_archive_with_upgrade_policy modifies the prompting upgrade policy
-# and create a separate rootfs for this upgrade policy, named after app_id.
-# The reason not using just tar .. -C chroot . is that using '.' was found
-# not working once and checking if using the simpler command is safe needs
-# verification of the app installation on all Windows 10 builds we support
-# with WSL.
-create_archive_with_upgrade_policy() {
-    upgrade_policy=$1
-    app_id=$2
-
-    cd chroot
-    sed -i "s#Prompt=.*#Prompt=${upgrade_policy}#" ./etc/update-manager/release-upgrades
-    tar --xattrs --sort=name -czf ../livecd.ubuntu-wsl.${app_id}.rootfs.tar.gz *
-    cd ..
-}
-
-# release-upgrader configuration, 3 cases:
-# Ubuntu-Version: never
-# ubuntu (latest LTS): lts
-# preview (current dev): normal
-
-# We produce the following tar with this policy:
-# Any XY.04, where Y is pair: upgrade-never
-# Any XY.04, where Y is pair and current year is between XY-1 to XY+2 (included): upgrade-lts
-# Any releases, where XY.04, where current date is comprised within 6 months.
-
-version=$(chroot chroot lsb_release --release --short)
-
-if [ $(is_lts "${version}") = "true" ]; then
-    create_archive_with_upgrade_policy "never" "ubuntu${version}lts"
-fi
-
-if [ $(is_current_lts_release "${version}" $(date +"%y")) = "true" ]; then
-    create_archive_with_upgrade_policy "lts" "ubuntu"
-fi
-
-if [ $(is_development_release "${version}" $(date +"%y") $(date +"%m")) = "true" ]; then
-    create_archive_with_upgrade_policy "normal" "ubuntupreview"
-fi
-
-
 # Remove initial ext4-formatted fs
 rm -f binary/boot/filesystem.ext4