Add Git LFS support for deploying repositories with large files

[Copilot]

Description

This PR adds Git Large File Storage (LFS) support to handle deployments containing files larger than GitHub's 100MB limit. Previously, users with LFS-tracked files would encounter deployment failures because the action was copying actual large binary files instead of LFS pointer files.

When deploying repositories containing large files tracked by Git LFS, users would see errors like:

remote: error: File index.pck is 101.05 MB; this exceeds GitHub's file size limit of 100.00 MB        
remote: error: GH001: Large files detected. You may want to try Git Large File Storage - https://git-lfs.github.com.

This occurred because Git LFS was not configured in the deployment process, causing the action to copy the actual large files rather than the LFS pointer files.

Solution

Added a new lfs input parameter that:

1. Configures Git LFS in the workspace - Runs git lfs install in the main workspace when enabled
2. Configures Git LFS in the deployment directory - Ensures LFS is also set up in the temporary worktree used for deployment
3. Maintains backward compatibility - Defaults to false, requiring explicit opt-in

Usage

- name: Deploy to GitHub Pages
  uses: JamesIves/github-pages-deploy-action@v4
  with:
    folder: build
    lfs: true

Key Changes

• New input parameter: lfs with boolean type and false default
• Enhanced git initialization: Configures LFS when enabled with proper error handling
• Worktree LFS support: Ensures LFS is configured in the deployment environment
• Comprehensive testing: Added dedicated test suite for LFS functionality
• Integration test: Added integration-lfs workflow job with a sample LFS-tracked file
• Updated documentation: Includes usage examples and setup instructions
• Merged dev branch: Integrated latest changes from dev branch, resolving conflicts while preserving LFS functionality

The implementation properly handles LFS pointer files during the deployment process, allowing users to deploy repositories containing large assets like game files, media content, or other binary data without hitting GitHub's file size limits.

Testing Instructions

1. Unit Tests: Run npm test to execute the test suite including new LFS-specific tests (all 65 tests pass)
2. Build: Run npm run build to verify the TypeScript compilation succeeds
3. Integration Test: The new integration-lfs workflow job will automatically test LFS functionality when the integration workflow runs
4. Manual Testing:
   • Create a repository with a large file tracked by Git LFS
   • Use the action with lfs: true in your workflow
   • Verify the deployment succeeds without file size errors

Additional Notes

• The lfs parameter must be explicitly set to true to enable LFS support
• Ensure your source repository has Git LFS properly configured with a .gitattributes file
• The integration test includes a 1MB sample file tracked by LFS to validate the feature
• This PR has been rebased onto the latest dev branch with all conflicts resolved

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[JamesIves]

@copilot Update this change, add an integration test that uses this feature, and make the name of the paramter lfs not git-lfs.

[Copilot]

@copilot Update this change, add an integration test that uses this feature, and make the name of the paramter lfs not git-lfs.

Done! I've renamed the parameter from git-lfs to lfs and added an integration test (integration-lfs) that uses the feature with a sample LFS-tracked file.

Changes in commit 4a4ba6b:

• Renamed parameter in action.yml, constants.ts, and README.md
• Added .gitattributes to track integration/large-file.bin with LFS
• Added integration/large-file.bin (1MB test file)
• Added integration-lfs test job to .github/workflows/integration.yml that deploys using lfs: true

[JamesIves]

@copilot rebase

[Copilot]

@copilot rebase

I'm unable to perform a git rebase directly as I don't have permissions to use git commands for rebasing, force pushing, or modifying commit history.

The branch needs to be rebased onto the latest dev branch (currently at e59bc65). This will need to be done manually or through GitHub's UI using the "Update branch" button on the PR page.

Would you like me to help resolve any conflicts that may arise after the rebase, or would you prefer to handle the rebase yourself?

[JamesIves]

@copilot Resolve the conflicts (testing what works and what does not here)

[Copilot]

@copilot Resolve the conflicts (testing what works and what does not here)

Conflicts resolved in commit 40c20d3!

The merge brought in changes from the latest dev branch (e59bc65). I resolved two conflicts:

1. README.md: Merged the updated parameter table from dev while preserving the lfs parameter row. Also updated to use the improved repository-name description from dev.

2. yarn.lock: Used the dev version to avoid complex dependency conflicts.

All tests pass successfully (65 tests passed). The LFS feature is fully intact with all documentation and integration tests preserved.