Fix Hub location

scripts/UpdateDependenciesCoreFx.ps1

@@ -109,6 +109,7 @@ Write-Host "Loading deps from $depsPath"
 
 if (-not $NoCommit) {
     $baseBranch = "dev"
+    Invoke-Block { & git fetch origin }
 
     $currentBranch = Invoke-Block { & git rev-parse --abbrev-ref HEAD }
     $destinationBranch = "rybrande/UpgradeDepsTest"

scripts/common.psm1

@@ -15,7 +15,10 @@ function Invoke-Block([scriptblock]$cmd) {
     # - $?: did the powershell script block throw an error
     # - $lastexitcode: did a windows command executed by the script block end in error
     if ((-not $?) -or ($lastexitcode -ne 0)) {
-        Write-Warning $error[0]
+        if(($error -ne $null))
+        {
+            Write-Warning $error[0]
+        }
         throw "Command failed to execute: $cmd"
     }
 }
@@ -121,9 +124,8 @@ function Ensure-Hub() {
     if (-Not (Test-Path $hubLocation) ) {
         $source = "https://github.com/github/hub/releases/download/v2.3.0-pre9/hub-windows-amd64-2.3.0-pre9.zip"
         $zipLocation = "$tmpDir\hub.zip"
-        if(-not (Test-Path $zipLocation)) {
-            New-Item -ItemType directory -Path $tmpDir
-        }
+
+        mkdir -Path $tmpDir -ErrorAction Ignore | Out-Null
 
         Invoke-WebRequest -OutFile $zipLocation -Uri $source
 
@@ -169,8 +171,7 @@ function CommitUpdatedVersions(
 
         $subject = "Updating external dependencies"
 
-        # Have to pipe null so that the output from this doesn't end up as part of the return value
-        $null = Invoke-Block { & git commit -m $subject }
+        Invoke-Block { & git commit -m $subject } | Out-Null
 
         $body = "$subject`n`n"