#!/usr/bin/env sh
set -euC

cd "$(dirname "$0")"

{
cat <<\EOF
<!-- This file is auto-generated by `machines.md.sh` from the machines'
     configuration. -->

# Machines

Currently, this repository keeps track of the following VMs:

Machine | Proxmox | Description
--------|---------|-------------
EOF

vmOptions=$(
  cd ..
  nix eval \
    --impure --raw --expr "
      builtins.toJSON (builtins.getFlake (builtins.toString ./.)).vmOptions
    " \
    --log-format raw --quiet
)

## NOTE: `jq`'s `keys` is alphabetically sorted, just what we want here.
for machine in $(echo "$vmOptions" | jq -r 'keys[]'); do
  if [ "${machine#test}" = "$machine" ]; then
    proxmox=$(echo "$vmOptions" | jq -r ".$machine.proxmox")
    description=$(echo "$vmOptions" | jq -r ".$machine.description" | head -n 1)

    # shellcheck disable=SC2016
    printf '[`%s`](./%s) | %s | %s\n' "$machine" "$machine" "$proxmox" "$description"
  fi
done

cat <<\EOF

This table excludes all machines with names starting with `test`.
EOF
} >| machines.md