Add New-ReleaseAsset.ps1 (#1031)

Co-authored-by: Danny Amirault <dana@microsoft.com>

eng/common/scripts/New-ReleaseAsset.ps1

@@ -0,0 +1,62 @@
+<#
+.SYNOPSIS
+Uploads the release asset and returns the resulting object from the upload
+
+.PARAMETER ReleaseTag
+Tag to look up release
+
+.PARAMETER AssetPath
+Location of the asset file to upload
+
+.PARAMETER GitHubRepo
+Name of the GitHub repo to search (of the form Azure/azure-sdk-for-cpp)
+
+#>
+
+param (
+    [Parameter(Mandatory = $true)]
+    [ValidateNotNullOrEmpty()]
+    [string] $ReleaseTag,
+
+    [Parameter(Mandatory = $true)]
+    [ValidateNotNullOrEmpty()]
+    [string] $AssetPath,
+
+    [Parameter(Mandatory = $true)]
+    [ValidateNotNullOrEmpty()]
+    [string] $GitHubRepo,
+
+    [Parameter(Mandatory = $true)]
+    [ValidateNotNullOrEmpty()]
+    [string] $GitHubPat
+)
+
+# Get information about release at $ReleaseTag
+$releaseInfoUrl = "https://api.github.com/repos/$GitHubRepo/releases/tags/$ReleaseTag"
+Write-Verbose "Requesting release info from $releaseInfoUrl"
+$release = Invoke-RestMethod `
+    -Uri  $releaseInfoUrl `
+    -Method GET
+
+$assetFilename = Split-Path $AssetPath -Leaf
+
+# Upload URL comes in the literal form (yes, those curly braces) of:
+# https://uploads.github.com/repos/Azure/azure-sdk-for-cpp/releases/123/assets{?name,label}
+# Converts to something like:
+# https://uploads.github.com/repos/Azure/azure-sdk-for-cpp/releases/123/assets?name=foo.tar.gz
+# Docs: https://docs.github.com/en/rest/reference/repos#get-a-release-by-tag-name
+$uploadUrl = $release.upload_url.Split('{')[0] + "?name=$assetFilename"
+
+Write-Verbose "Uploading $assetFilename to $uploadUrl"
+
+$asset = Invoke-RestMethod `
+    -Uri $uploadUrl `
+    -Method POST `
+    -InFile $AssetPath `
+    -Credential $credentials `
+    -Headers @{ Authorization = "token $GitHubPat" } `
+    -ContentType "application/gzip"
+
+Write-Verbose "Upload complete. Browser download URL: $($asset.browser_download_url)"
+
+return $asset