Adds a usage section to the backup script

Closes #18

Signed-off-by: Justin Yost <[email protected]>

backup.sh

@@ -1,5 +1,69 @@
 #!/usr/bin/env bash
 
+#---------------------------------------------------------------------
+usage () {
+	cat <<EOT
+${0##*/}
+	Backup a directory, MySQL, PostgreSQL, MongoDB and SQLite databases
+	using a rotating scheme of daily, weekly and monthly backups.
+
+	To use, move the config.sh.default included in the repo to config.sh
+	and edit the various settings as need.
+
+	When it runs for each feature turned on:
+	* Creates the backup
+	* Moves to the BACKUP_LOCAL_PATH folder
+	* Names the backup as daily_db_backup_${TOOL_BEING_BACKED_UP}....
+	* If it is 1st day of the week, copys it to
+	weekly_${TOOL_BEING_BACKED_UP}....
+	* If it is 1st day of the month, copys it to
+	monthly_${TOOL_BEING_BACKED_UP}.....
+	* Daily backups that are older than a week are deleted
+	* Weekly backups that are older than a 28 days (4 weeks) are deleted
+	* Monthly backups that are older than a 365 days (1 year) are deleted
+	* If the AMAZON_S3_UPLOAD_ACTIVE is set to true, the BACKUP_LOCAL_PATH
+	folder is synched with a S3 Bucket
+
+Requires:
+	S3 Command Line Tools installed: http://s3tools.org/s3cmd
+
+Usage:
+	${0##*/}
+
+Bash Variables Set From "config.sh":
+	# MySQL Settings
+	MYSQL_DB_USERNAME=ThisIsYourMySQLUsername
+	MYSQL_DB_PASSWORD=ThisIsYourMySQLRootPassword
+
+	# PostgreSQL Settings
+	POSTGRES_DB_USERNAME=ThisIsYourPostgresUsername
+
+	# MongoDB Settings
+	MONGO_DB_USERNAME=ThisIsYourMongoDBUsername
+	MONGO_DB_PASSWORD=ThisIsYourMongoDBPassword
+
+	# SQLite Settings
+	SQLITE_PATH=/Users/jtyost2/Sites/jtyost2/S3_Backup/testing
+
+	# Webroot Backup Settings
+	WEBROOT_LOCAL_PATH=/Users/jtyost2/Desktop
+	BACKUP_LOCAL_PATH=/Users/jtyost2/Sites/jtyost2/testing_dump/
+	AMAZON_S3_PATH=s3://BucketName/folder_in_bucket/
+
+	# Turn on or off features
+	MYSQL_DUMP_ACTIVE=false
+	POSTGRESQL_DUMP_ACTIVE=false
+	MONGODB_DUMP_ACTIVE=false
+	SQLITE_DUMP_ACTIVE=true
+	AMAZON_S3_UPLOAD_ACTIVE=false
+EOT
+
+	exit ${1:-0}  # Exit with code 0 unless an arg is passed to the method.
+}
+if [ "$1" = '-h' ]; then
+	usage
+fi
+
 #Import settings from ./config.sh
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 source ${DIR}/config.sh
@@ -101,4 +165,4 @@ then
 	s3cmd sync --delete-removed ${BACKUP_LOCAL_PATH} ${AMAZON_S3_PATH}
 fi
 
-echo "S3Backup Completed For: ${THEDATE}" >&2
+echo "S3Backup Completed For: ${THEDATE}" >&2