svere.sh first take, to make it more flexible

bin/serve.sh

@@ -1,11 +1,122 @@
 #!/bin/bash
+#
+# This script allows you to serve different TiddlyWiki editions. 
+# It respects the TIDDLYWIKI_EDITION_PATH variable described
+# at: # http://tiddlywiki.com/#Environment%20Variables%20on%20Node.js
+#
+# Be sure your server tiddlywiki.info configuration contains the 
+#   - "tiddlywiki/tiddlyweb" and the "tiddlywiki/filesystem" plugins.
+# Otherwise saving is not possible. 
 
-# serve TiddlyWiki5 over HTTP
+# global settings
+# set -o nounset	#exit if a variable is not set
+set -o errexit	#exit on error
 
-# Optional parameter is the username for signing edits
+# get command naem and path info needed for help text
+ARG0=$(basename $0)
+#ARG0DIR=$(dirname $0)
+#[ $ARG0DIR == "." ] && ARG0DIR=$PWD
+
+# ---- helper functions ----
+_log () {
+	echo
+	echo "---> $1"
+}
+
+version () {
+	echo "$ARG0, TiddlyWiki serve script version 0.0.1"
+	echo
+}
+
+usage() {
+	version
+	echo Usage:$'\t'$ARG0 [edition dir] [username] [password] [host] [port]
+	echo
+}
+
+help() {
+	usage
+
+	echo Optional parameters
+	echo
+	echo $'\t'\$1 .. editions directory .. full path or relative to current directory
+	echo $'\t'\$2 .. username for signing edits - can be empty like this: ""
+	echo $'\t'\$3 .. password - can be empty like this: ""
+	echo $'\t'\$4 .. IP address or HOST name .. defaults to "localhost"
+	echo $'\t'\$5 .. PORT .. defaults to 8080
+	echo
+	echo $'\t'-v .. Version
+	echo $'\t'-h .. Help
+	echo
+	echo Example 1 ./serve ./edition/tw5.com-server username
+	echo Example 2 ./serve ./edition/tw5.com-server \"\" \"\" localhost 9090
+	echo .. Example 2 defines: empty username, empty password
+	echo
+}
+
+# error handling
+error() {
+    echo "$ARG0: $*" 1>&2
+    exit 1
+}
+
+# start the server
+serve () {
+	#echo 1:$1 2:$2 3:$3 4:$4 5:$5
+
+	node ./tiddlywiki.js \
+		"$1" \
+		--verbose \
+		--server "$5" $:/core/save/all text/plain text/html "$2" "$3" "$4" \
+		|| exit 1
+}
+
+check_edition_directory () {
+	if [ ! -d $TIDDLYWIKI_EDITION_PATH ]; then
+		_log "Edition directory: '$TIDDLYWIKI_EDITION_PATH' doesn't exist. Create it!"
+		exit 1
+	fi
+}
+
+# --------------------------------------------------
+# command line parameter handler
+while getopts vh flag
+do
+    case "$flag" in
+    (h) help; exit 0;;
+    (v) version; exit 0;;
+    (*) help
+		error
+		exit 1;;
+    esac
+done
+shift $(expr $OPTIND - 1)
+
+#----------------------------------------------------
+
+# If no edition parameter is provided, use defaults
+if [ $# -eq 0 ]; then
+	# check if the edition path environment variable is set. If yes use it.
+	[ -z $TIDDLYWIKI_EDITION_PATH ] && TIDDLYWIKI_EDITION_PATH="./editions/tw5.com-server"
+
+	# directory must exist!
+	check_edition_directory
+
+	# serve the default settings.
+	serve "$TIDDLYWIKI_EDITION_PATH" "" "" localhost 8080
+else
+	if [ -z "$5" ]; then 
+		PORT=8080 
+	else 
+		PORT=$5
+	fi
+	
+	# If the 1st parameter (edition) is set, it has priority.
+	TIDDLYWIKI_EDITION_PATH=$1
+
+	# directory must exist!
+	check_edition_directory
+
+	serve "$TIDDLYWIKI_EDITION_PATH" "$2" "$3" "$4" $PORT
+fi
 
-node ./tiddlywiki.js \
-	editions/tw5.com-server \
-	--verbose \
-	--server 8080 $:/core/save/all text/plain text/html "$1" "$2" "$3"\
-	|| exit 1