#!/bin/bash

# This script gets executed on container start. Its job is to set up

# the Mercurial environment and invoke the server.

# Mercurial can be started in two modes.

# If the MERCURIAL_SOURCE environment variable is set and it points to a

# Mercurial source directory, we will install Mercurial from that directory.

# Otherwise, we download the Mercurial source and install it manually.

set -e

SOURCE_DIR=/var/hg/source

INSTALL_DIR=/var/hg/install

REPOS_DIR=/var/hg/repos

HTDOCS_DIR=/var/hg/htdocs

if [ ! -d ${SOURCE_DIR} ]; then

  echo "Mercurial source not available at ${SOURCE_DIR}"

  echo "You need to mount a volume containing the Mercurial source code"

  echo "when running the container. For example:"

  echo ""

  echo "  $ docker run -v ~/src/hg:/${SOURCE_DIR} hg-apache"

  echo ""

  echo "This container will now stop running."

  exit 1

fi

echo "Installing Mercurial from ${SOURCE_DIR} into ${INSTALL_DIR}"

pushd ${SOURCE_DIR}

/usr/bin/python2.7 setup.py install --root=/ --prefix=${INSTALL_DIR} --force

popd

mkdir -p ${HTDOCS_DIR}

# Provide a default config if the user hasn't supplied one.

if [ ! -f ${HTDOCS_DIR}/config ]; then

  cp /defaulthgwebconfig ${HTDOCS_DIR}/config

fi

if [ ! -f ${HTDOCS_DIR}/hgweb.wsgi ]; then

  cat >> ${HTDOCS_DIR}/hgweb.wsgi << EOF

config = '${HTDOCS_DIR}/config'

import sys

sys.path.insert(0, '${INSTALL_DIR}/lib/python2.7/site-packages')

from mercurial import demandimport

demandimport.enable()

from mercurial.hgweb import hgweb

application = hgweb(config)

EOF

fi

mkdir -p ${REPOS_DIR}

if [ ! -d ${REPOS_DIR}/repo ]; then

  ${INSTALL_DIR}/bin/hg init ${REPOS_DIR}/repo

  chown -R www-data:www-data ${REPOS_DIR}/repo

fi

# This is necessary to make debuginstall happy.

if [ ! -f ~/.hgrc ]; then

  cat >> ~/.hgrc << EOF

[ui]

username = Dummy User <nobody@example.com>

EOF

fi

echo "Verifying Mercurial installation looks happy"

${INSTALL_DIR}/bin/hg debuginstall

. /etc/apache2/envvars

echo "Starting Apache HTTP Server on port 80"

echo "We hope you remembered to publish this port when running the container!"

echo "If this is an interactive container, simply CTRL^C to stop."

exec "$@"