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#!/bin/sh
#
# Copyright (C) 2014 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# This is a "morph deploy" configuration extension to fully configure
# a GitLab and GitLab CI instance at deployment time. It uses the 
# following variables from the environment:
#
#   * GITLAB_HOSTNAME
#   * GITLAB_PORT
#   * GITLAB_EMAIL
#   * UNICORN_PORT
#   * CI_PORT
#   * UNICORN_CI_PORT
#   * MAIL_SEND_TYPE
#   * SMTP_ADDR
#   * SMTP_PORT
#   * SMTP_USER
#   * SMTP_PASS
#   * SMTP_DOMAIN

set -e

ROOT="$1"


##########################################################################
# Substitutions in configuration files
##########################################################################

echo "Creating /etc/gitlab-setup.sed"

cat <<EOF > "$ROOT"/etc/gitlab-setup.sed
s/##GITLAB_HOSTNAME##/$GITLAB_HOSTNAME/g
s/##GITLAB_PORT##/$GITLAB_PORT/g
s/##GITLAB_EMAIL##/$GITLAB_EMAIL/g
s/##UNICORN_PORT##/$UNICORN_PORT/g
s/##CI_PORT##/$CI_PORT/g
s/##UNICORN_CI_PORT##/$UNICORN_CI_PORT/g
EOF

echo "Performing substitutions in /usr/share/gitlab config"

sed -f "$ROOT"/etc/gitlab-setup.sed -i \
    "$ROOT"/usr/share/gitlab-install/gitlab/config/gitlab.yml \
    "$ROOT"/usr/share/gitlab-install/gitlab/config/unicorn.rb \
    "$ROOT"/usr/share/gitlab-install/gitlab/lib/support/nginx/gitlab \
    "$ROOT"/usr/share/gitlab-install/gitlab-shell/config.yml \
    "$ROOT"/usr/share/gitlab-install/gitlab-ci/config/application.yml \
    "$ROOT"/usr/share/gitlab-install/gitlab-ci/config/unicorn.rb \
    "$ROOT"/usr/share/gitlab-install/gitlab-ci/lib/support/nginx/gitlab_ci \
    "$ROOT"/usr/share/gitlab-install/nginx.conf

##########################################################################

echo "Create gitlab-setup unit file"
cat <<EOF > "$ROOT/etc/systemd/system/gitlab-setup.service"
[Unit]
Description=Run gitlab-setup (once)
Requires=network.target
After=network.target
Requires=local-fs.target
After=local-fs.target

ConditionPathExists=!/home/git/gitlab

[Service]
Type=oneshot
ExecStart=/usr/share/gitlab-setup
Restart=no

[Install]
WantedBy=multi-user.target
EOF

ln -s "/etc/systemd/system/gitlab-setup.service" \
    "$ROOT/etc/systemd/system/multi-user.target.wants/gitlab-setup.service"

##########################################################################

rubyescape() {
    # In ruby, single quoted strings need \ and ' escaping
    printf "%s\n" "$1" | sed -e "s/['\\]/\\\&/g" \
                             -e "s/^/'/" \
                             -e "s/$/'/"
}

sedescape() {
    # Escape all non-alphanumeric characters
    printf "%s\n" "$1" | sed -e 's/\W/\\&/g'
}

do_escapes() {
    printf "%s\n" "$(sedescape "$(rubyescape "$1")")"
}

if [ "$MAIL_SEND_TYPE" = "smtp" ]; then

    echo "Setting up SMTP for sending e-mail"

    for CONFIG_PATH in \
        "/usr/share/gitlab-ce/config" "/usr/share/gitlab-ci/config"
    do
        sed -i 's/sendmail/smtp/' \
            "$ROOT$CONFIG_PATH/environments/production.rb"

        sed -e s/\"email.server.com\"/"$(do_escapes "$SMTP_ADDR")/g" \
            -e s/\"smtp\"/"$(do_escapes "$SMTP_USER")/g" \
            -e s/\"123456\"/"$(do_escapes "$SMTP_PASS")/g" \
            -e s/\"gitlab.company.com\"/"$(do_escapes "$SMTP_DOMAIN")/g" \
            -e s/456/$SMTP_PORT/g \
                <"$ROOT$CONFIG_PATH/initializers/smtp_settings.rb.sample" \
                >"$ROOT$CONFIG_PATH/initializers/smtp_settings.rb"
    done
fi