ci: optimize sparse-checkout and cache to reduce cache size by keithwillcode · Pull Request #26692 · calcom/cal.com

keithwillcode · 2026-01-10T13:33:27Z

What does this PR do?

Reduces the CI git checkout cache size from ~637 MB to ~86 MB - an 87% reduction.

Root Cause

The first actions/checkout@v4 in the prepare job was doing a full checkout (~535 MB), then dangerous-git-checkout applied sparse-checkout. But files from the first checkout remained on disk because sparse-checkout doesn't remove files that were already checked out.

Fix

Limit first checkout to .github only - The first checkout only needs access to local actions, so we use sparse-checkout: .github to avoid downloading the full repo
Sparse-checkout exclusions - dangerous-git-checkout excludes large files not needed for CI:
- docs/images/ (~90 MB)
- packages/app-store/*/static/*.{png,jpg,jpeg,gif} (~101 MB)
Cache exclusions - Exclude apps/web/public/app-store from cache (generated files)

Results

Metric	Before	After	Improvement
Cache Size	~637 MB	~86 MB	87% reduction

Mandatory Tasks (DO NOT REMOVE)

I have self-reviewed the code (A decent size PR without self-review might be rejected).
I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. N/A - CI configuration change only.
I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

Merge this PR and observe the cache size in subsequent CI runs
Verify that all CI jobs (lint, type-check, unit tests, E2E tests) still pass
Verified cache size: ~86 MB (down from ~637 MB)

Human Review Checklist

Verify the first checkout only needs .github directory to access local actions
Verify sparse-checkout patterns are syntactically correct
Confirm no CI jobs depend on the excluded files (docs/images, app-store screenshots)
Check that SVG icons are correctly preserved (they use .svg extension, not excluded)

Requested by: @keithwillcode
Link to Devin run: https://app.devin.ai/sessions/762cef383ff64e60a5dbd356d6d5759d

Exclude additional large files from CI checkout that are not needed for builds/tests: - docs/images/ (~90MB) - Documentation images - packages/app-store/*/static/*.png,jpg,jpeg,gif (~140MB) - App store screenshots These files are only needed for documentation rendering and app store UI display, not for CI builds, linting, type checking, or tests. SVG icons in app-store are preserved as they may be needed for the build. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

devin-ai-integration · 2026-01-10T13:33:29Z

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The apps/web/public/app-store directory contains ~151MB of static files copied from packages/app-store/*/static/ during build. These files are regenerated during yarn install and don't need to be cached. Combined with the sparse-checkout exclusions, this should significantly reduce the git checkout cache size. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

The first checkout in the prepare job was doing a full checkout (~535 MB), and then dangerous-git-checkout applied sparse-checkout. But the files from the first checkout remained on disk because sparse-checkout doesn't remove files that were already checked out. By limiting the first checkout to only .github (which is needed to access the local actions), we avoid downloading the full repo twice. The actual sparse-checkout with exclusions is then applied by dangerous-git-checkout. This should reduce the cache from ~504 MB to ~148 MB. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

keithwillcode · 2026-01-10T18:17:22Z

Test run https://github.com/calcom/cal.com/actions/runs/20882119629

github-actions · 2026-01-10T18:29:21Z

E2E results are ready!

Workflow #98284.1 latest results

cubic-dev-ai

No issues found across 3 files

github-actions · 2026-01-10T19:28:06Z

Devin AI is resolving merge conflicts

This PR has merge conflicts with the main branch. A Devin session has been created to automatically resolve them.

View Devin Session

Devin will:

Merge the latest main into this branch
Resolve any conflicts intelligently
Run lint/type checks to ensure validity
Push the resolved changes

If you prefer to resolve conflicts manually, you can close the Devin session and handle it yourself.

Resolved merge conflicts in: - .github/actions/cache-checkout/action.yml: Kept PR's save/restore mode design - .github/workflows/pr.yml: Kept PR's sparse-checkout + dangerous-git-checkout approach Co-Authored-By: unknown <>

github-actions · 2026-01-10T19:42:18Z

Devin AI is resolving merge conflicts

This PR has merge conflicts with the main branch. A Devin session has been created to automatically resolve them.

View Devin Session

Devin will:

Merge the latest main into this branch
Resolve any conflicts intelligently
Run lint/type checks to ensure validity
Push the resolved changes

If you prefer to resolve conflicts manually, you can close the Devin session and handle it yourself.

devin-ai-integration · 2026-01-10T19:47:06Z

Merge conflicts have been resolved. The conflict in .github/actions/cache-checkout/action.yml was resolved by keeping the PR's redesigned cache save/restore approach (which separates save and restore into explicit modes using actions/cache/save@v4 and actions/cache/restore@v4).

The devin-conflict-resolution label should be removed from this PR.

Co-Authored-By: unknown <>

…fix pr.yml compatibility Co-Authored-By: unknown <>

devin-ai-integration · 2026-01-10T23:28:02Z

I've corrected the merge conflict resolution. The previous resolution incorrectly kept the separate save/restore approach, but I've now properly resolved it to:

Keep main's combined actions/cache@v4 design (from PR fix: refactor cache-checkout to use actions/cache@v4 with fallback #26702)
Add the sparse-checkout exclusions from this PR to both cache-checkout and dangerous-git-checkout:
- !/docs/images/
- !packages/app-store/*/static/*.png
- !packages/app-store/*/static/*.jpg
- !packages/app-store/*/static/*.jpeg
- !packages/app-store/*/static/*.gif
Add !apps/web/public/app-store to the cache paths
Keep the sparse-checkout: .github optimization in pr.yml

The devin-conflict-resolution label should be removed from this PR.

cubic-dev-ai

No issues found across 3 files

…6692) * ci: optimize sparse-checkout to reduce cache size by ~230MB Exclude additional large files from CI checkout that are not needed for builds/tests: - docs/images/ (~90MB) - Documentation images - packages/app-store/*/static/*.png,jpg,jpeg,gif (~140MB) - App store screenshots These files are only needed for documentation rendering and app store UI display, not for CI builds, linting, type checking, or tests. SVG icons in app-store are preserved as they may be needed for the build. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * ci: exclude generated app-store static files from cache The apps/web/public/app-store directory contains ~151MB of static files copied from packages/app-store/*/static/ during build. These files are regenerated during yarn install and don't need to be cached. Combined with the sparse-checkout exclusions, this should significantly reduce the git checkout cache size. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * ci: fix sparse-checkout by limiting first checkout to .github only The first checkout in the prepare job was doing a full checkout (~535 MB), and then dangerous-git-checkout applied sparse-checkout. But the files from the first checkout remained on disk because sparse-checkout doesn't remove files that were already checked out. By limiting the first checkout to only .github (which is needed to access the local actions), we avoid downloading the full repo twice. The actual sparse-checkout with exclusions is then applied by dangerous-git-checkout. This should reduce the cache from ~504 MB to ~148 MB. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * fix: update cache-checkout to include sparse-checkout exclusions and fix pr.yml compatibility Co-Authored-By: unknown <> --------- Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

pull-request-size bot added the size/XS label Jan 10, 2026

devin-ai-integration bot changed the title ~~ci: optimize sparse-checkout to reduce cache size by ~230MB~~ ci: optimize sparse-checkout and cache to reduce cache size Jan 10, 2026

keithwillcode added the core area: core, team members only label Jan 10, 2026

keithwillcode self-assigned this Jan 10, 2026

keithwillcode added this to the v6.1 milestone Jan 10, 2026

keithwillcode added the ready-for-e2e label Jan 10, 2026

Merge branch 'main' into devin/sparse-checkout-optimization-1768051915

4e4e9dc

keithwillcode marked this pull request as ready for review January 10, 2026 18:33

keithwillcode requested a review from a team as a code owner January 10, 2026 18:33

graphite-app bot added the foundation label Jan 10, 2026

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anikdhabal previously approved these changes Jan 10, 2026

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Merge branch 'main' into devin/sparse-checkout-optimization-1768051915

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github-actions bot added the devin-conflict-resolution label Jan 10, 2026

devin-ai-integration bot dismissed anikdhabal’s stale review via 975b02c January 10, 2026 19:32

pull-request-size bot added size/M and removed size/XS labels Jan 10, 2026

devin-ai-integration bot removed the devin-conflict-resolution label Jan 10, 2026

github-actions bot added the devin-conflict-resolution label Jan 10, 2026

keithwillcode marked this pull request as draft January 10, 2026 23:15

devin-ai-integration bot added 2 commits January 10, 2026 23:24

Merge branch 'main' into devin/sparse-checkout-optimization-1768051915

4e6084b

Co-Authored-By: unknown <>

fix: update cache-checkout to include sparse-checkout exclusions and …

cbfb3c0

…fix pr.yml compatibility Co-Authored-By: unknown <>

devin-ai-integration bot force-pushed the devin/sparse-checkout-optimization-1768051915 branch from 305c86d to cbfb3c0 Compare January 10, 2026 23:27

pull-request-size bot added size/S and removed size/M labels Jan 10, 2026

keithwillcode marked this pull request as ready for review January 11, 2026 09:12

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hbjORbj approved these changes Jan 11, 2026

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hbjORbj merged commit 784db75 into main Jan 11, 2026
112 of 116 checks passed

hbjORbj deleted the devin/sparse-checkout-optimization-1768051915 branch January 11, 2026 10:17

keithwillcode mentioned this pull request Jan 11, 2026

feat: implement sparse checkout to reduce CI checkout times #26670

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ci: optimize sparse-checkout and cache to reduce cache size#26692

ci: optimize sparse-checkout and cache to reduce cache size#26692
hbjORbj merged 8 commits intomainfrom
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keithwillcode commented Jan 10, 2026 • edited by devin-ai-integration bot Loading Uh oh! There was an error while loading. Please reload this page.

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What does this PR do?

Root Cause

Fix

Results

Mandatory Tasks (DO NOT REMOVE)

How should this be tested?

Human Review Checklist

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