#!/bin/bash

set +eux


## Certificate DST_Root_CA-X3 expired, it needs to be removed
## from list of available certificates. Debian <10 have the issue.
##
## Fixing: https://www.reddit.com/r/sysadmin/comments/pzags0/lets_encrypts_dst_root_ca_x3_expired_yesterday/
## see also: https://techcrunch.com/2021/09/21/lets-encrypt-root-expiry/?guccounter=1

modified_certificate=
mkdir -p /usr/local/share/ca-certificates/custom
for certfile_name in isrgrootx1:ISRG_Root_X1 isrg-root-x2 lets-encrypt-r3; do
    certfile=${certfile_name%%:*}
    name=${certfile_name#*:}
    echo "Checking $certfile for $name"
    if ! [ -e "/usr/local/share/ca-certificates/custom/$certfile".crt ] &&
       ! [ -e "/etc/ssl/certs/$name.pem" ]; then
        wget --no-check-certificate https://letsencrypt.org/certs/"$certfile".pem \
             -O "/usr/local/share/ca-certificates/custom/$certfile".crt
        modified_certificate=1
    fi
done

if grep "^mozilla/DST_Root_CA_X3.crt" /etc/ca-certificates.conf 2>/dev/null 2>&1; then
    sed -ri 's%^(mozilla/DST_Root_CA_X3.crt)%!\1%g' /etc/ca-certificates.conf
fi

if [ -n "$modified_certificate" ]; then
        update-ca-certificates
fi

## We can now do the ``apt-get update`` safely...

apt-get update
apt-get -y install bash-completion wget bzip2 git-core \
        less tmux mosh \
        sudo git vim file </dev/null

apt-get -y python-software-properties </dev/null ||
    apt-get -y software-properties-common </dev/null


case $(lsb_release -is) in
    Ubuntu)
        apt-get install -y language-pack-en </dev/null
        ;;
    Debian)
	    if ! type -p locale-gen >/dev/null && [ -x /usr/sbin/locale-gen ]; then
            echo "Your shell is incorrectly set as your PATH doesn't contain '/usr/sbin'." >&2
            echo "This probably happens because you've incorrectly entered root environment" >&2
            echo "Please use 'sudo -i' or 'su -' to enter a root shell from another user." >&2
            echo "  ref: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918754"
            exit 1
        fi
        sed -ri 's/^\s*#\s*(en_US\.UTF-?8.*)\s*$/\1/g' /etc/locale.gen
        locale-gen
        ;;
esac