local/bin/rshare: Add support for HTTP servers.

.local/bin/rshare

@@ -1,8 +1,9 @@
 #!/bin/sh
 
-PORT=8888
+PORT=8080
 CONFIG=$HOME/.config/rsync/rsync.conf
 CACHE_DIR=$HOME/.cache/rsyncd
+OPT_HTTP=false
 
 IP=$(ip addr | awk '/state UP/ {getline; getline; $0=$2; gsub(/\/.*/, "");print; exit}')
 
@@ -10,23 +11,32 @@ usage () {
 	cat <<EOF>&2
 Usage: ${0##*/} PATH
 
-Startup an rsync daemon and share PATH as read-only under the 'files' module.
-Clients can sync with, for instance:
+Share PATH over the network.
 
-  rsync -iavzzP rsync://$IP:$PORT/files
+By default, startup an rsync daemon and share PATH as read-only under the
+'files' module.  Clients can sync with, for instance:
+
+  rsync -iavzzP rsync://$IP:$PORT/files DESTINATION
+
+An HTTP server can be started instead.
 
 Options:
 
   -p PORT: Specify a port number (default: $PORT).
            Must be above 1024 to run without privileges.
+
+  -H:      Start an HTTP server instead.
+
 EOF
 }
 
-while getopts ":hp:" opt; do
+while getopts ":hHp:" opt; do
 	case $opt in
 	h)
 		usage
 		exit ;;
+	H)
+		OPT_HTTP=true ;;
 	p)
 		PORT="$OPTARG" ;;
 	\?)
@@ -41,11 +51,12 @@ shift $(($OPTIND - 1))
 [ "$1" = "-h" ] && usage && exit
 [ "$1" = "--" ] && shift
 
-mkdir -p "$(dirname "$CONFIG")" "$CACHE_DIR"
 
 TARGET=$(realpath "$1")
 
-cat<<EOF>"$CONFIG"
+share_rsync(){
+	mkdir -p "$(dirname "$CONFIG")" "$CACHE_DIR"
+	cat<<EOF>"$CONFIG"
 pid file = $CACHE_DIR/rsyncd.pid
 lock file = $CACHE_DIR/rsyncd.lock
 log file = $CACHE_DIR/rsyncd.log
@@ -60,5 +71,32 @@ timeout = 300
 
 EOF
 
-rsync --daemon --config="$CONFIG" && \
-	echo "rsync daemon listening on $IP:$PORT"
+	rsync --daemon --config="$CONFIG" && \
+		echo >&2 "rsync daemon listening on $IP:$PORT"
+}
+
+share_woof() {
+	woof -c 9999 -p $PORT "$TARGET"
+}
+
+share_python() {
+	echo >&2 "Python HTTP server will listen on $IP:$PORT."
+	if command -v guix >/dev/null 2>&1; then
+		guix environment -C -N --expose="$TARGET"="$TARGET" --ad-hoc python -- \
+			python3 -m http.server -d "$TARGET" $PORT
+	elif command -v python3 >/dev/null 2>&1; then
+		python3 -m http.server -d "$TARGET" $PORT
+	else
+		python -m http.server -d "$TARGET" $PORT
+	fi
+}
+
+if $OPT_HTTP; then
+	if [ -f "$TARGET" ]; then
+		share_woof "$TARGET"
+	else
+		share_python "$TARGET"
+	fi
+else
+	share_rsync
+fi