Disable sparse-checkout on subsequent checkout

[antoineco]

If actions/checkout is invoked once with sparse-checkout and cone mode disabled, core.sparseCheckout remains enabled for all subsequent invocations of actions/checkout.

This PR addresses the problem by explicitly (re)setting core.sparseCheckout to false (which is the workaround I currently use in my workflow via a separate step).

Reproduction:

    steps:
      - uses: actions/checkout@v4
        with:
          ref: mybranch
          sparse-checkout-cone-mode: false
          sparse-checkout: /my.config

     # $ ls
     # /my.config

      - uses: actions/checkout@v4
        with:
          ref: mybranch

     # $ ls
     # /my.config

[Copilot]

Pull Request Overview

This PR fixes an issue where core.sparseCheckout remains enabled after using actions/checkout with sparse-checkout, affecting subsequent checkout operations that should use the full repository.

• Explicitly sets core.sparseCheckout to false in the disableSparseCheckout method
• Ensures sparse-checkout configuration is properly reset for subsequent checkout operations

---

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[mohannadmir]

Disable all

[Nicholechristensen]

Pull Request Overview

This PR fixes an issue where core.sparseCheckout remains enabled for subsequent uses of actions/checkout after being initially set with sparse-checkout configuration, preventing full repository checkouts.

Key Changes:

• Adds explicit disabling of core.sparseCheckout config in the disableSparseCheckout() method
• Ensures subsequent checkout actions work correctly without sparse-checkout restrictions

---

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[Nicholechristensen]

Pull Request Overview

This PR fixes an issue where core.sparseCheckout remains enabled for subsequent uses of actions/checkout after being initially set with sparse-checkout configuration, preventing full repository checkouts.

Key Changes:

• Adds explicit disabling of core.sparseCheckout config in the disableSparseCheckout() method
• Ensures subsequent checkout actions work correctly without sparse-checkout restrictions

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}