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nginx_ensite.sh
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nginx_ensite.sh
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#!/usr/bin/env bash
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### nginx_ensite --- Bash script to enable or disable a site in nginx.
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### Copyright (C) 2010, 2015 António P. P. Almeida <appa@perusio.net>
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### Author: António P. P. Almeida <appa@perusio.net>
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### Permission is hereby granted, free of charge, to any person obtaining a
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### copy of this software and associated documentation files (the "Software"),
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### to deal in the Software without restriction, including without limitation
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### the rights to use, copy, modify, merge, publish, distribute, sublicense,
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### and/or sell copies of the Software, and to permit persons to whom the
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### Software is furnished to do so, subject to the following conditions:
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### The above copyright notice and this permission notice shall be included in
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### all copies or substantial portions of the Software.
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### Except as contained in this notice, the name(s) of the above copyright
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### holders shall not be used in advertising or otherwise to promote the sale,
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### use or other dealings in this Software without prior written authorization.
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### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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### IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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### FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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### THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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### LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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### FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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### DEALINGS IN THE SOFTWARE.
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SCRIPTNAME=${0##*/}
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## The nginx binary. Check if we're root or not. If we are get the
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## path to nginx. If not hardcode the path.
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if [ $(id -u) -eq 0 ]; then
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IS_ROOT=1
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NGINX=$(command -v nginx) || exit 1
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else
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STATUS=0
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NGINX=/usr/sbin/nginx
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fi
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## Default value for the configuration directory.
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NGINX_CONF_DIR=/etc/nginx
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function print_usage() {
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echo "$SCRIPTNAME [-c <nginx configuration base directory> default: /etc/nginx] [ -s <startup program name> default: service nginx reload] <site name>"
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}
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## Extract the startup program name from a given argument. If it's a
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## path to nginx then add the '-s reload' to the name. Otherwise just
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## return the given argument.
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## $1: the program name.
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## Returns the proper startup program name,
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function get_startup_program_name() {
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local value="$1"
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if [[ $1 =~ [[:alnum:]/-]]+nginx$ ]]; then
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value="$1 -s reload"
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elif [ -z "$1" ]; then
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value="service nginx reload"
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else
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value=$1
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fi
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echo "$value"
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}
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## The default start up program is service.
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STARTUP_PROGRAM_NAME=$(get_startup_program_name)
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## Create the relative path to the vhost file.
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## $1: configuration file name (usually the vhost)
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## $2: available sites directory name (usually sites-available)
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## Returns the relative path from the sites-enabled directory.
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function make_relative_path() {
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printf '../%.0s%s/%s' $(eval echo {0..$(expr length "${1//[^\/]/}")}) $2 $1
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}
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## Checking the type of action we will perform. Enabling or disabling.
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ACTION=$(echo $SCRIPTNAME | awk '$0 ~ /dissite/ {print "DISABLE"} $0 ~ /ensite/ {print "ENABLE"} $0 !~ /(dis|en)site/ {print "UNKNOWN"}')
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if [ "$ACTION" == "UNKNOWN" ]; then
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echo "$SCRIPTNAME: Unknown action!" >&2
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print_usage
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exit 2
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fi
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## Check the number of arguments.
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if [ $# -lt 1 -o $# -gt 5 ]; then
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print_usage >&2
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exit 3
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fi
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## Parse the getops arguments.
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while getopts c:s: OPT; do
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case $OPT in
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c|+c)
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NGINX_CONF_DIR=$(realpath "$OPTARG")
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if [[ ! -d $NGINX_CONF_DIR ]]; then
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echo "$NGINX_CONF_DIR directory not found." >&2
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exit 3
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fi
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;;
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s|+s)
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STARTUP_PROGRAM_NAME=$(get_startup_program_name "$OPTARG")
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;;
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*)
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print_usage >&2
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exit 4
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;;
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esac
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done
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shift $(( OPTIND - 1 ))
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OPTIND=1
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## The paths for both nginx configuration files and the sites
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## configuration files and symbolic link destinations.
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AVAILABLE_SITES_PATH="$NGINX_CONF_DIR/sites-available"
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ENABLED_SITES_PATH="$NGINX_CONF_DIR/sites-enabled"
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## Check the number of arguments.
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if [ $# -ne 1 ]; then
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print_usage >&2
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exit 3
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else
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SITE_AVAILABLE=$(make_relative_path "$1" ${AVAILABLE_SITES_PATH##*/})
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## If enabling the 'default' site then make sure that it's the
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## first to be loaded.
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if [ $1 == "default" ]; then
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SITE_ENABLED="$ENABLED_SITES_PATH/default"
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else
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SITE_ENABLED="$ENABLED_SITES_PATH/$1"
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fi
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## Check if the directory where we will place the symlink
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## exists. If not create it.
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[ -d ${SITE_ENABLED%/*} ] || mkdir -p ${SITE_ENABLED%/*}
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fi
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## Check that the file corresponding to site exists if enabling or
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## that the symbolic link exists if disabling. Perform the desired
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## action if possible. If not signal an error and exit.
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case $ACTION in
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ENABLE)
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# Change to the directory where we will place the symlink so that we
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# see the relative path correctly.
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cd "${SITE_ENABLED%/*}";
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if [ -r $SITE_AVAILABLE ]; then
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## Test for a well formed configuration only when we are
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## root.
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if [ -n "$IS_ROOT" ]; then
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echo "Pre-flight check..."
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$NGINX -t
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STATUS=$?
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fi
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if [ $STATUS -ne 0 ]; then
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exit 5
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fi
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## Check the config testing status and if the link exists already.
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if [ -h $SITE_ENABLED ]; then
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## If already enabled say it and exit.
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echo "$1 is already enabled."
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exit 0
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fi
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ln -s $SITE_AVAILABLE $SITE_ENABLED
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if [ -n "$IS_ROOT" ]; then
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echo "New config check..."
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$NGINX -t
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STATUS=$?
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fi
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if [ $STATUS -eq 0 ]; then
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echo "Site $1 has been enabled."
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# printf '\nRun "%s" to apply the changes.\n' $STARTUP_PROGRAM_NAME
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echo "Run '$STARTUP_PROGRAM_NAME' to apply the changes."
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exit 0
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else
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rm $SITE_ENABLED
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echo "$1 not enabled"
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exit 5
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fi
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else
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echo "Site configuration file $1 not found." >&2
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exit 6
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fi
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;;
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DISABLE)
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if [ "$1" = "default" ] ; then
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if [ -h "$ENABLED_SITES_PATH/default" ] ; then
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SITE_ENABLED="$ENABLED_SITES_PATH/default"
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fi
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fi
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if [ -h $SITE_ENABLED ]; then
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rm $SITE_ENABLED
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echo "Site $1 has been disabled."
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# printf '\nRun "%s" to apply the changes.\n' $STARTUP_PROGRAM_NAME
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echo "Run '$STARTUP_PROGRAM_NAME' to apply the changes."
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exit 0
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else
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echo "Site $1 doesn't exist." >&2
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exit 7
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fi
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;;
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esac
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