Add tests for pulling vLLM-compatible models from HuggingFace

[Copilot]

The ability to pull vLLM-compatible (safetensors) models from HuggingFace was already implemented but lacked test coverage. This PR adds tests to document and verify the feature.

Changes

• cmd/cli/commands/utils_test.go: Added test cases for vLLM-compatible HuggingFace model name normalization

  • hf.co/meta-llama/Llama-3.1-8B-Instruct → huggingface.co/meta-llama/llama-3.1-8b-instruct:latest
  • hf.co/Qwen/Qwen2.5-3B-Instruct:FP8 → huggingface.co/qwen/qwen2.5-3b-instruct:fp8

• pkg/inference/models/handler_test.go: Added two test functions

  • TestPullSafetensorsModel: Full pull flow for safetensors models using NormalizeModelName for tag generation
  • TestNormalizeHuggingFaceVLLMModel: Coverage for Llama, Qwen, Mistral, DeepSeek model patterns

Example

// HuggingFace vLLM-compatible models are normalized correctly
result := NormalizeModelName("hf.co/meta-llama/Llama-3.1-8B-Instruct")
// Returns: "huggingface.co/meta-llama/llama-3.1-8b-instruct:latest"

The existing implementation supports:

• hf.co/ prefix normalization to huggingface.co/ with lowercase
• Safetensors format detection and storage
• HF_TOKEN authentication for private models
• Automatic vLLM backend selection for safetensors models

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:

• cloud.google.com
  • Triggering command: /update-job-proxy /update-job-proxy (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy x64/pkg/tool/linux_amd64/vet (dns block)
• dario.cat
  • Triggering command: /update-job-proxy /update-job-proxy (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy x64/pkg/tool/linux_amd64/vet (dns block)
• go.googlesource.com
  • Triggering command: /update-job-proxy /update-job-proxy (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy x64/pkg/tool/linux_amd64/vet (dns block)
• go.opentelemetry.io
  • Triggering command: /update-job-proxy /update-job-proxy (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy x64/pkg/tool/linux_amd64/vet (dns block)
• go.uber.org
  • Triggering command: /update-job-proxy /update-job-proxy (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy x64/pkg/tool/linux_amd64/vet (dns block)
• go.yaml.in
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• gonum.org
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  • Triggering command: /update-job-proxy /update-job-proxy x64/pkg/tool/linux_amd64/vet (dns block)
• google.golang.org
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• gopkg.in
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• gotest.tools
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• howett.net
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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>Pull vllm-compatible models from HuggingFace</issue_title>
<issue_description></issue_description>

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

• Fixes Pull vllm-compatible models from HuggingFace docker/model-runner#474

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