Wsl-RootFS.psm1
|
# Copyright 2022 Antoine Martin # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # The base URLs for LXD images $base_lxd_url = "https://uk.lxd.images.canonical.com/images" # We don't support ARM yet $lxd_directory_suffix = "amd64/default" $lxd_rootfs_name = "rootfs.tar.xz" class UnknownLXDDistributionException : System.SystemException { UnknownLXDDistributionException([string] $Os, [string]$Release) : base("Unknown LXD distribution with OS $Os and Release $Release. Check $base_lxd_url.") { } } <# .SYNOPSIS Returns the URL of the root filesystem of the LXD image for the specified OS and Release. .DESCRIPTION LXD images made by canonical (https://uk.lxd.images.canonical.com/) are "rolling". In Consequence, getting the current root filesystem URL for a distro Involves browsing the distro directory to get the directory name of the last build. .PARAMETER Os Parameter The name of the OS (debian, ubuntu, alpine, rockylinux, centos, ...) .PARAMETER Release The release (version). Highly dependent on the distro. For rolling release distros (e.g. Arch), use `current`. .OUTPUTS string The URL of the root filesystem for the requested distribution. .EXAMPLE Get-Lxd-RootFS-Url almalinux 8 Returns the URL of the root filesystem for almalinux version 8 .EXAMPLE Get-Lxd-RootFS-Url -Os centos -Release 9-Stream Returns the URL of the root filesystem for CentOS Stream version 9 #> function Get-Lxd-RootFS-Url { param ( [Parameter(Position = 0, Mandatory = $true)] [string]$Os, [Parameter(Position = 1, Mandatory = $true)] [string]$Release ) $url = "$base_lxd_url/$Os/$Release/$lxd_directory_suffix" try { $last_release_directory = (Invoke-WebRequest $url).Links | Select-Object -Last 1 -ExpandProperty "href" } catch { throw [UnknownLXDDistributionException]::new($OS, $Release) } return "$url/$($last_release_directory.Substring(2))$lxd_rootfs_name" } |