#!/bin/bash -l
# Copyright (C) 2016 Ian Kelling
# This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR

# dunno why debian installed postfix with builddep emacs
# but I will just explicitly install it here since
# I use it for sending mail in emacs.
if private-host; then
    relayhost="[mail.messagingengine.com]:587"
else
    # ses initially suggests port 25, but I had problems connecting to that.
    relayhost="[email-smtp.us-west-2.amazonaws.com]:587"
fi
if isdeb; then
    s debconf-set-selections<<EOF
postfix postfix/main_mailer_type select Satellite system
postfix postfix/mailname string $host
postfix postfix/relayhost string $relayhost
EOF

    pi postfix
else
    pi postfix
    # Settings from reading the output when installing on debian,
    # then seeing which were different in a default install on arch.
    # I assume the same works for fedora.
    postconfin <<EOF
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
relayhost = $relayhost
inet_interfaces = loopback-only
EOF

    s systemctl enable postfix
    s systemctl start postfix
fi


# note, previously, the rest of setup was done separately.


# based on,http://www.postfix.org/qmgr.8.html and my notes in gnus
# originally tried moving specific directories under /var/spool/postfix,
# but postfix didn't like that
if [[ ! -L /var/spool/postfix ]]; then
    ser stop postfix
    n=/q/postfix-`distro-name``debian-archive`
    if [[ -e $n ]]; then
        echo "$0: warning: $n already exists before we do the link, removing it"
        s rm -rf $n
    fi
    s mv /var/spool/postfix $n
    s lnf -T $n /var/spool/postfix
    ser start postfix
    s journalctl -n 20 | cat # sudo as we may not have journal reading rights yet
fi


# This also works instead of ~/.forward
# s sed -i '/^root/d' /etc/aliases ||:
#echo "root: $HOSTNAME@$SOME_DOMAIN" | s tee -a /etc/aliases
# this can't be a symlink and has permission restrictions
# it might work in /etc/aliases, but this seems more proper.

if s grep amazonaws /etc/postfix/sasl_passwd &>/dev/null; then
    forward=$HOSTNAME@$PERSONAL_DOMAIN
else
    forward=$HOSTNAME@$IMPERSONAL_DOMAIN
fi
e $forward > ~/.forward
e $forward | s tee /root/.forward
s newaliases

# if I wanted the from address to be renamed and sent to a different address,
# echo "sdx@localhost development@localhost" | sudo dd of=/etc/postfix/recipient_canonical
# sudo postmap hash:/etc/postfix/recipient_canonical
# sudo service postfix reload


# i'm assuming mail just won't work on systems without the sasl_passwd.
postconfin <<'EOF'
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_security_level = secure
message_size_limit =  20480000
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
EOF
# ^ I ran into a log file not sending cuz of size. double from 10 to 20 meg limit

s postmap hash:/etc/postfix/sasl_passwd
# offlineimap uses this too, it is much easier to use one location than to
# condition it's config and postfix's config
case $distro in
    fedora) s lnf -T ca-certificates.crt /etc/ssl/ca-bundle.trust.crt ;;
    *) :
esac

s service postfix reload
sgo postfix