Fix curl not following redirects when downloading product version files

[Copilot]

When downloading product version files from a custom feed that returns redirects, curl doesn't follow them because the -L flag is missing. This causes get_specific_product_version to return an empty string, and the script erroneously succeeds by finding an empty version directory.

Changes

• Add -L flag to curl in get_specific_product_version function to follow redirects

# Before curl -s --fail "${download_link}${feed_credential}"# After curl -sL --fail "${download_link}${feed_credential}"

This aligns with other curl usages in the script (downloadcurl, get_http_header_curl) which already use -L.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• 1s1vsblobprodcus386.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• 4vyvsblobprodcus361.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• c50vsblobprodcus330.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• e7bvsblobprodcus348.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• ofvvsblobprodcus315.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• p2ovsblobprodcus312.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• sc4vsblobprodcus331.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)
• u3hvsblobprodcus371.vsblob.vsassets.io
  • Triggering command: /usr/bin/dotnet dotnet restore (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>dotnet-install does not handle redirects when downloading the product version files</issue_title>
<issue_description>When downloading the product version files, the curl command doesn't follow redirects. We've seen this with a custom feed. In this case, get_specific_product_version returns an empty string. The script also erroneously succeeds when this happens. The specific version ends up empty, and then the check for whether the version already exists succeeds. It finds <install location>/shared/Microsoft.NETCore.App/ (empty version directory).</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixesdotnet-install does not handle redirects when downloading the product version files #670

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