Added update wrappers and preflight check shell scripts.

updatewrappers.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+export JAVA_HOME="$JAVA8_HOME"
+export PATH="$(cygpath "$JAVA_HOME")/bin:$PATH"
+
+# set the examples directories
+declare -a dirs=(
+    "${PWD##*/}"
+    "examples/java"
+    "examples/kotlin"
+    "annotation-processor/java"
+    "annotation-processor/kotlin")
+
+pwd=$PWD
+cyan=$(tput setaf 6)
+green=$(tput setaf 2)
+red=$(tput setaf 1)
+std=$(tput sgr0)
+
+kVer=$(kobaltw --version | awk '{print substr($2, 1, length($2)-1)}')
+updateWrappers() {
+    curVer="$(gradle --version | awk '/Gradle/ {print $2}')"
+    if [ -d gradle ]; then
+        if [ "$curVer" != "$(./gradlew --version | awk '/Gradle/ {print $2}')" ]; then
+            gradle -q --console=plain wrapper
+            echo -e "        $(./gradlew --version | awk '/Gradle/') ${green}UPDATED${std}"
+        else
+            echo -e "        Gradle $curVer UP-TO-DATE"
+        fi
+    fi
+    if [ -d kobalt ]; then
+        kw=$(cut -d "=" -f 2 kobalt/wrapper/kobalt-wrapper.properties)
+        if [ "$kw" = "$kVer" ]
+        then
+            echo -e "        Kobalt $kw UP-TO-DATE"
+        else
+            echo "kobalt.version=$kVer" > kobalt/wrapper/kobalt-wrapper.properties
+            echo -e "        Kobalt $kVer ${green}UPDATED${std}"
+        fi
+    fi
+}
+
+echo -e "Updating wrappers..."
+
+for d in "${dirs[@]}"; do
+    if [ -d "$d" ]; then
+        cd "$d" || exit 1
+    fi
+    echo -e "    ${cyan}${d}${std}"
+    updateWrappers
+    cd "$pwd"
+done