Update the build scripts to the latest version

Author: Victor Hurdugaci

build.ps1

@@ -1,3 +1,33 @@
+$ErrorActionPreference = "Stop"
+
+function DownloadWithRetry([string] $url, [string] $downloadLocation, [int] $retries) 
+{
+    while($true)
+    {
+        try
+        {
+            Invoke-WebRequest $url -OutFile $downloadLocation
+            break
+        }
+        catch
+        {
+            $exceptionMessage = $_.Exception.Message
+            Write-Host "Failed to download '$url': $exceptionMessage"
+            if ($retries -gt 0) {
+                $retries--
+                Write-Host "Waiting 10 seconds before retrying. Retries left: $retries"
+                Start-Sleep -Seconds 10
+
+            }
+            else 
+            {
+                $exception = $_.Exception
+                throw $exception
+            }
+        }
+    }
+}
+
 cd $PSScriptRoot
 
 $repoFolder = $PSScriptRoot
@@ -20,7 +50,8 @@ if (!(Test-Path $buildFolder)) {
 
     $localZipFile="$tempFolder\korebuild.zip"
 
-    Invoke-WebRequest $koreBuildZip -OutFile $localZipFile
+    DownloadWithRetry -url $koreBuildZip -downloadLocation $localZipFile -retries 6
+
     Add-Type -AssemblyName System.IO.Compression.FileSystem
     [System.IO.Compression.ZipFile]::ExtractToDirectory($localZipFile, $tempFolder)
 

build.sh

@@ -18,7 +18,18 @@ if test ! -d $buildFolder; then
 
     localZipFile="$tempFolder/korebuild.zip"
 
-    wget -O $localZipFile $koreBuildZip 2>/dev/null || curl -o $localZipFile --location $koreBuildZip /dev/null
+    retries=6
+    until (wget -O $localZipFile $koreBuildZip 2>/dev/null || curl -o $localZipFile --location $koreBuildZip 2>/dev/null)
+    do
+        echo "Failed to download '$koreBuildZip'"
+        if [ "$retries" -le 0 ]; then
+            exit 1
+        fi
+        retries=$((retries - 1))
+        echo "Waiting 10 seconds before retrying. Retries left: $retries"
+        sleep 10s
+    done
+    
     unzip -q -d $tempFolder $localZipFile
 
     mkdir $buildFolder
@@ -32,4 +43,4 @@ if test ! -d $buildFolder; then
     fi
 fi
 
-$buildFile -r $repoFolder "$@"
+$buildFile -r $repoFolder "$@"