Add updateRemote.sh script to update the contentFs on multiple APs at once

As flashing a new LittleFS in case of e.g. a changed main.js is taking time and
the provided web interface is not the fastest to navigate we are introducing a
small script to upload the whole data folder to the esp.
It can also be sourced into a shell allowing for manual file uploads to the esp.

In addition we are also adding a "push_ota.sh" script designed to show its use as
well as uploading the recenty build firmware to the esp where future commits will
allow of SDCard based updates.

Signed-off-by: Mimoja <git@mimoja.de>

ESP32_AP-Flasher/push_ota.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+source updateRemote.sh > /dev/null
+
+if [ -z "$IP" ]
+  then
+    echo "ERROR: Empty IP variable"
+    exit 1
+fi
+
+if [ -z "$PIOENV" ]
+  then
+    echo "ERROR: Empty PIOENV variable"
+    exit 1
+fi
+
+md5sum .pio/build/$PIOENV/firmware.bin | tee .pio/build/$PIOENV/firmware.md5
+upload_file .pio/build/$PIOENV/firmware.md5:ota_md5.txt
+upload_file .pio/build/$PIOENV/firmware.bin:ota.bin

ESP32_AP-Flasher/updateRemote.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+(return 0 2>/dev/null) && sourced=1 || sourced=0
+
+if [ $sourced -eq 0 ]; then
+	if [ $# -eq 0 ]
+	  then
+	    echo "No IP address provided"
+		exit 1
+	fi
+
+	IP=$1
+
+	if [ -z "$IP" ]
+	  then
+	    echo "ERROR: Empty IP"
+		exit 1
+fi
+fi
+upload_file () {
+	for file in "$@"
+	do
+		split=( $(echo $file  | tr ":" " ") )
+		echo $split
+		filename=${split[0]}
+		if [ -z  ${split[1]} ]; then
+			filepath=$(echo ${filename} | cut -d'/' -f2-)
+		else
+			filepath=${split[1]}
+		fi
+		echo $filename "-->" $filepath
+
+		curl "http://${IP}/edit" -X POST \
+		-H "Origin: http://${IP}" \
+		-H 'Connection: keep-alive' \
+		-H "Referer: http://${IP}/edit" \
+		-F "data=@${filename};filename=\"${filepath}\""
+		echo ""
+	done
+}
+
+export -f upload_file
+
+if [ $sourced -eq 0 ]; then
+	export IP
+	find data -type f -exec bash -c "upload_file {} $IP" \;
+else
+	echo "You can now call "
+	echo "IP=1.2.3.4 upload_file data/file1.txt data/file2.txt:target.txt"
+fi