docker-letsencrypt-nginx-proxy-companion/app/letsencrypt_service_data.tmpl

LETSENCRYPT_CONTAINERS=(
    {{ range $hosts, $containers := groupBy $ "Env.LETSENCRYPT_HOST" }}
        {{ if trim $hosts }}
            {{ range $container := $containers }}
                {{ if parseBool (coalesce $container.Env.LETSENCRYPT_SINGLE_DOMAIN_CERTS "false") }}
                    {{ range $host := split $hosts "," }}
                        {{ $host := trim $host }}
                        '{{ printf "%.12s" $container.ID }}_{{ sha1 $host }}'
                    {{ end }}
                {{ else }}
                    '{{ printf "%.12s" $container.ID }}'
                {{ end }}
            {{ end }}
        {{ end }}
    {{ end }}
)

{{ range $hosts, $containers := groupBy $ "Env.LETSENCRYPT_HOST" }}
    {{ $hosts := trimSuffix "," $hosts }}
    {{ range $container := $containers }}
        {{ $cid := printf "%.12s" $container.ID }}
        {{ if parseBool (coalesce $container.Env.LETSENCRYPT_SINGLE_DOMAIN_CERTS "false") }}
            {{ range $host := split $hosts "," }}
                {{ $host := trim $host }}
                {{ $host := trimSuffix "." $host }}
                {{ $hostHash := sha1 $host }}
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_HOST=('{{ $host }}')
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_EMAIL="{{ $container.Env.LETSENCRYPT_EMAIL }}"
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_KEYSIZE="{{ $container.Env.LETSENCRYPT_KEYSIZE }}"
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_TEST="{{ $container.Env.LETSENCRYPT_TEST }}"
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_ACCOUNT_ALIAS="{{ $container.Env.LETSENCRYPT_ACCOUNT_ALIAS }}"
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_RESTART_CONTAINER="{{ $container.Env.LETSENCRYPT_RESTART_CONTAINER }}"
                LETSENCRYPT_{{ $cid }}_{{ $hostHash }}_MIN_VALIDITY="{{ $container.Env.LETSENCRYPT_MIN_VALIDITY }}"
            {{ end }}
        {{ else }}
            LETSENCRYPT_{{ $cid }}_HOST=( {{ range $host := split $hosts "," }}{{ $host := trim $host }}{{ $host := trimSuffix "." $host }}'{{ $host }}' {{ end }})
            LETSENCRYPT_{{ $cid }}_EMAIL="{{ $container.Env.LETSENCRYPT_EMAIL }}"
            LETSENCRYPT_{{ $cid }}_KEYSIZE="{{ $container.Env.LETSENCRYPT_KEYSIZE }}"
            LETSENCRYPT_{{ $cid }}_TEST="{{ $container.Env.LETSENCRYPT_TEST }}"
            LETSENCRYPT_{{ $cid }}_ACCOUNT_ALIAS="{{ $container.Env.LETSENCRYPT_ACCOUNT_ALIAS }}"
            LETSENCRYPT_{{ $cid }}_RESTART_CONTAINER="{{ $container.Env.LETSENCRYPT_RESTART_CONTAINER }}"
            LETSENCRYPT_{{ $cid }}_MIN_VALIDITY="{{ $container.Env.LETSENCRYPT_MIN_VALIDITY }}"
        {{ end }}
    {{ end }}
{{ end }}