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Use download-at-temp-and-rename pattern in powershell too

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This commit is contained in:
Alexander Karatarakis 2017-11-03 15:48:21 -07:00
parent 7af697e6e8
commit 82ce87cfd0
1 changed files with 18 additions and 4 deletions
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22
scripts/fetchDependency.ps1
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@ -65,6 +65,18 @@ function SelectProgram([Parameter(Mandatory=$true)][string]$Dependency)
New-Item -ItemType directory -Path $downloadDir | Out-Null
}
$downloadsTemp = "$downloadDir/temp"
if (Test-Path $downloadsTemp) # Delete temp dir if it exists
{
Remove-Item $downloadsTemp -Recurse -Force
}
if (!(Test-Path $downloadsTemp)) # Recreate temp dir. It may still be there the dir was in use
{
New-Item -ItemType directory -Path $downloadsTemp | Out-Null
}
$tempDownloadName = "$downloadsTemp/$Dependency-$downloadVersion.temp"
$WC = New-Object System.Net.WebClient
$ProxyAuth = !$WC.Proxy.IsBypassed($url)
@ -79,15 +91,16 @@ function SelectProgram([Parameter(Mandatory=$true)][string]$Dependency)
$PSDefaultParameterValues.Add("Start-BitsTransfer:ProxyAuthentication","Basic")
$PSDefaultParameterValues.Add("Start-BitsTransfer:ProxyCredential", $ProxyCred)
}
Start-BitsTransfer -Source $url -Destination $downloadPath -ErrorAction Stop
Start-BitsTransfer -Source $url -Destination $tempDownloadName -ErrorAction Stop
Move-Item -Path $tempDownloadName -Destination $downloadPath
return
}
catch [System.Exception]
{
# If BITS fails for any reason, delete any potentially partially downloaded files and continue
if (Test-Path $downloadPath)
if (Test-Path $tempDownloadName)
{
Remove-Item $downloadPath
Remove-Item $tempDownloadName
}
}
}
@ -98,7 +111,8 @@ function SelectProgram([Parameter(Mandatory=$true)][string]$Dependency)
}
Write-Verbose("Downloading $Dependency...")
$WC.DownloadFile($url, $downloadPath)
$WC.DownloadFile($url, $tempDownloadName)
Move-Item -Path $tempDownloadName -Destination $downloadPath
}
# Enums (without resorting to C#) are only available on powershell 5+.