Sync fetch-configlet.ps1 script (#165)

bin/fetch-configlet.ps1

@@ -1,24 +1,42 @@
-Function DownloadUrl ([string] $FileName, $Headers) {
-    $latestUrl = "https://api.github.com/repos/exercism/configlet/releases/latest"
-    $json = Invoke-RestMethod -Headers $Headers -Uri $latestUrl
-    $json.assets | Where-Object { $_.browser_download_url -match $FileName } | Select-Object -ExpandProperty browser_download_url
-}
+# This file is a copy of the
+# https://github.com/exercism/configlet/blob/main/scripts/fetch-configlet.ps1 file.
+# Please submit bugfixes/improvements to the above file to ensure that all tracks
+# benefit from the changes.
 
-Function Headers {
-    If ($GITHUB_TOKEN) { @{ Authorization = "Bearer ${GITHUB_TOKEN}" } } Else { @{ } }
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+$requestOpts = @{
+    Headers           = If ($env:GITHUB_TOKEN) { @{ Authorization = "Bearer ${env:GITHUB_TOKEN}" } } Else { @{ } }
+    MaximumRetryCount = 3
+    RetryIntervalSec  = 1
 }
 
-Function Arch {
-    If ([Environment]::Is64BitOperatingSystem) { "64bit" } Else { "32bit" }
+Function Get-DownloadUrl {
+    $arch = If ([Environment]::Is64BitOperatingSystem) { "x86-64" } Else { "i386" }
+    $latestUrl = "https://api.github.com/repos/exercism/configlet/releases/latest"
+    Invoke-RestMethod -Uri $latestUrl -PreserveAuthorizationOnRedirect @requestOpts `
+    | Select-Object -ExpandProperty assets `
+    | Where-Object { $_.name -match "^configlet_.+_windows_${arch}.zip$" } `
+    | Select-Object -ExpandProperty browser_download_url -First 1
 }
 
-$arch = Arch
-$headers = Headers
-$fileName = "configlet-windows-$arch.zip"
 $outputDirectory = "bin"
-$outputFile = Join-Path -Path $outputDirectory -ChildPath $fileName
-$zipUrl = DownloadUrl -FileName $fileName -Headers $headers
+if (!(Test-Path -Path $outputDirectory)) {
+    Write-Output "Error: no ./bin directory found. This script should be ran from a repo root."
+    exit 1
+}
+
+Write-Output "Fetching configlet..."
+$downloadUrl = Get-DownloadUrl
+$outputFileName = "configlet.zip"
+$outputPath = Join-Path -Path $outputDirectory -ChildPath $outputFileName
+Invoke-WebRequest -Uri $downloadUrl -OutFile $outputPath @requestOpts
+
+$configletPath = Join-Path -Path $outputDirectory -ChildPath "configlet.exe"
+if (Test-Path -Path $configletPath) { Remove-Item -Path $configletPath }
+[System.IO.Compression.ZipFile]::ExtractToDirectory($outputPath, $outputDirectory)
+Remove-Item -Path $outputPath
 
-Invoke-WebRequest -Headers $headers -Uri $zipUrl -OutFile $outputFile
-Expand-Archive $outputFile -DestinationPath $outputDirectory -Force
-Remove-Item -Path $outputFile
+$configletVersion = (Select-String -Pattern "/releases/download/(.+?)/" -InputObject $downloadUrl -AllMatches).Matches.Groups[1].Value
+Write-Output "Downloaded configlet ${configletVersion} to ${configletPath}"