Skip build workflow for PRs with empty diffs#2479
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Agent-Logs-Url: https://github.com/nicklockwood/SwiftFormat/sessions/dafe86eb-bb2e-4a5f-9d2d-4d4cade47fa4 Co-authored-by: calda <1811727+calda@users.noreply.github.com>
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[WIP] Skip build workflow for pull requests with empty diff
Skip build workflow for PRs with empty diffs
Mar 28, 2026
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Much better 
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## develop #2479 +/- ##
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Coverage 95.29% 95.29%
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Files 167 167
Lines 25337 25337
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+ Hits 24145 24146 +1
+ Misses 1192 1191 -1 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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Apr 11, 2026
Co-authored-by: calda <1811727+calda@users.noreply.github.com>
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Empty PRs (e.g. from GitHub Copilot with no actual changes) were triggering the full
buildCI matrix unnecessarily..github/workflows/build.yml: Added acheck-for-changesgate job withif: github.event_name != 'pull_request' || github.event.pull_request.changed_files > 0. All 7 build jobs now declareneeds: check-for-changes— when the gate is skipped (empty-diff PR), GitHub Actions automatically skips all dependents. Push events tomain/developare unaffected.💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.