Fix cache issues with self-hosted runners #3879
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Disable julia-actions/cache for self-hosted runners as they persist between runs, which causes the cache action to fail when the depot already exists. This change: - Adds conditional logic to detect self-hosted runners via USE_SELF_HOSTED repository variable - Passes self-hosted=true when USE_SELF_HOSTED is set - Disables cache when running on self-hosted runners To use self-hosted runners, set the USE_SELF_HOSTED repository variable to 'true'. Fixes the issue discussed here: https://github.com/SciML/ModelingToolkit.jl/actions/runs/16840335621/job/47712027510 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>
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Summary
USE_SELF_HOSTEDrepository variable to detect when using self-hosted runnersProblem
As discussed in Slack, the caching fails on self-hosted runners because they don't clean slate between runs, so the depot already exists when the cache action tries to restore it.
Reference: https://github.com/SciML/ModelingToolkit.jl/actions/runs/16840335621/job/47712027510?pr=3869
Solution
Following Ian Butterworth's suggestion, this PR:
USE_SELF_HOSTEDrepository variableself-hosted: trueto the reusable workflow when the variable is setcache: false) for self-hosted runnersUsage
To use self-hosted runners, set the
USE_SELF_HOSTEDrepository variable to'true'in the repository settings.Test Plan
USE_SELF_HOSTED='true'to verify self-hosted runners work without cache errors🤖 Generated with Claude Code