[Build] Add build stats to track

See also [PlatformIO docs](http://docs.platformio.org/en/latest/faq.html#program-memory-usage) and esp8266/Arduino#3740 (comment)

.travis.yml

@@ -18,7 +18,7 @@ addons:
   apt:
     packages:
     - cppcheck
-
+    - binutils
 
 
 install:

before_deploy

@@ -30,6 +30,8 @@ if [ -d "docs/build" ]; then
   cp -r docs/build/* ${TMP_DIST}/docs/
 fi
 
+mkdir -p ${TMP_DIST}/memstats
+
 for ENV in \
   dev_ESP8266_4M\
   esp-wrover-kit_test_1M8_partition\
@@ -95,6 +97,16 @@ do
   else
     echo "Build too large for $ENV $FILESIZE > $MAX_FILESIZE "
   fi
+
+  ELFFILE=`echo ".pioenvs/${ENV}/firmware.elf"`
+  if [ -f $ELFFILE ]; then
+    SYMBOLS_STATS=`echo "${TMP_DIST}/memstats/${ENV}_symbols.txt"`
+    STRINGS_STATS=`echo "${TMP_DIST}/memstats/${ENV}_strings.txt"`
+    readelf -a ${ELFFILE} |grep 3ff |sort -n -k 3 > ${SYMBOLS_STATS}
+    objdump  -s -j .rodata ${ELFFILE} > ${STRINGS_STATS}
+    gzip ${SYMBOLS_STATS}
+    gzip ${STRINGS_STATS}
+  fi
 done
 
 #create a source structure that is the same as the original ESPEasy project (and works with the howto on the wiki)

src/WebServer.ino

@@ -3861,8 +3861,8 @@ void handle_tools() {
     SPIFFS.info(fs_info);
     if ((fs_info.totalBytes - fs_info.usedBytes) / 1024 > 50) {
       TXBuffer += F("<TR><TD>");
-      TXBuffer += "<script>function downloadUI() { fetch('https://raw.githubusercontent.com/ppisljar/espeasy_new_ui/master/build/index.htm.gz').then(r=>r.arrayBuffer()).then(r => {var f=new FormData();f.append('file', new File([new Blob([new Uint8Array(r)])], 'index.htm.gz'));f.append('edit', 1);fetch('/upload',{method:'POST',body:f}).then(() => {window.location.href='/';});}); }</script>";
-      TXBuffer += "<a class=\"button link wide\" onclick=\"downloadUI()\">download new ui</a>";
+      TXBuffer += F("<script>function downloadUI() { fetch('https://raw.githubusercontent.com/ppisljar/espeasy_new_ui/master/build/index.htm.gz').then(r=>r.arrayBuffer()).then(r => {var f=new FormData();f.append('file', new File([new Blob([new Uint8Array(r)])], 'index.htm.gz'));f.append('edit', 1);fetch('/upload',{method:'POST',body:f}).then(() => {window.location.href='/';});}); }</script>");
+      TXBuffer += F("<a class=\"button link wide\" onclick=\"downloadUI()\">download new ui</a>");
       TXBuffer += F("</TD><TD>Download new UI</TD></TR>");
     }
   #endif

tools/build_ESPeasy.sh

@@ -6,7 +6,7 @@
 # Needed packages:
 # sudo apt-get update
 # sudo apt-get upgrade
-# sudo apt install python-minimal virtualenv build-essential zip
+# sudo apt install python-minimal virtualenv build-essential zip binutils
 
 VENV=~/.venv/python2.7
 SRC=~/GitHub/letscontrolit/ESPEasy