Use a craft-providers callback hook to set the apt proxy by an app config

Metadata

Project: craft-application
Number: #493
Type: issue
State: open
Author: lengau
Labels: —
Created: 2024-09-25 04:53 PM UTC
Updated: 2025-05-23 05:26 PM UTC
Closed: —

Current evaluation

Feature request to use craft-providers' prepare_instance callback to set apt proxy from app config; upstream callback exists, but apt_proxy config is not yet implemented in craft-application.

Suggested action: keep open

Reason: Valid maintainer-filed enhancement. The prerequisite craft-providers#665 was implemented by merged PR #788, and craft_application/services/provider.py already accepts a prepare_instance callback, but repository search shows no apt_proxy configuration in craft-application, so the requested work remains.

Evaluated by: mr-cal-bot

Impact: 50 Quick Win: 16 Complexity: 55 Confidence: 70 Actionability: 70

Issue body

### What needs to get done In the provider service, when creating an instance, send a callback to craft-providers (see: https://github.com/canonical/craft-providers/issues/665). The default implementation of this callback should use the config service to get the app's `apt_proxy` configuration and use it to configure the proxy in apt. This is roughly what's done in https://github.com/canonical/craft-application/blob/c971a6098d5c3b93787bca217090af885088e626/craft_application/fetch.py#L388-L405 When doing this, have the fetch service use this. ### Why it needs to get done Allow apt proxies in craft apps

Evaluation history

Date	Model	Scores	Action	Summary
2026-10-09 02:06 AM UTC	~deepseek/deepseek-pro-latest	Impact: 50 Quick Win: 16 Complexity: 55 Confidence: 70 Actionability: 70	keep open	Feature request to use craft-providers' prepare_instance callback to set apt proxy from app config; upstream callback exists, but apt_proxy config is not yet implemented in craft-application.
2026-10-02 05:42 PM UTC	stealth/space-bunny-alpha	Impact: 45 Quick Win: 19 Complexity: 35 Confidence: 82 Actionability: 65	needs triage	Add a provider warmup callback that configures apt from the app's apt_proxy setting and use it for fetch-service instances; the upstream hook is available via craft-providers PR #788.
2026-09-21 07:43 AM UTC	qwen/qwen3.6-35b-a3b	Impact: 30 Quick Win: 11 Complexity: 40 Confidence: 70 Actionability: 60	needs triage	Feature request to add apt proxy configuration via callback hook in craft-application, blocked on craft-providers#665. No labels or maintainer assessment yet.
2026-09-01 04:19 AM UTC	qwen/qwen3.8-27b	Impact: 45 Quick Win: 27 Staleness: 55 Complexity: 40 Confidence: 65 Support Request: 0	needs triage	Feature request to add an apt_proxy app config option and use a craft-providers callback hook to configure apt proxy in build instances. No maintainer response or labels; only a Jira bot comment. ProxyService exists but lacks apt_proxy config support.
2026-07-22 12:16 PM UTC	qwen/qwen3.6-35b-a3b	Staleness: 85 Complexity: 45 Confidence: 80 Support Request: 5	needs triage	Feature request to implement a craft-providers callback hook for configuring apt proxy via app config. Currently unlabelled, inactive for over a year, awaiting maintainer assessment.
2026-07-08 11:29 PM UTC	qwen3.6-35b-a3b-mtp-q6	Staleness: 85 Complexity: 40 Confidence: 80 Support Request: 10	needs triage	Feature request to implement a craft-providers callback hook for configuring apt proxy via app settings. Unlabelled, inactive for over a year, awaiting maintainer triage and prioritization.

Update history

No update history recorded yet.

Related work

Related To: canonical/craft-providers#665 (confidence 90%)
Prerequisite callback hook request referenced in the issue; implemented by merged PR #788.
Related To: canonical/craft-providers#788 (confidence 90%)
Merged PR adding the prepare_instance callback before base setup.

Related issues

No related issues found above the similarity threshold.