From 43045ae669be728bd34ed56fcd1a230c0dc4d8e2 Mon Sep 17 00:00:00 2001
From: John Wesley Walker III <81404201+jww3@users.noreply.github.com>
Date: Tue, 23 Apr 2024 22:07:43 +0200
Subject: [PATCH] Disable `extensions.worktreeConfig` when disabling
 `sparse-checkout` (#1692)

---
 .github/workflows/test.yml |  6 +++---
 __test__/verify-basic.sh   | 14 ++++++++++++++
 dist/index.js              |  2 ++
 src/git-command-manager.ts |  2 ++
 4 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d8c83acf4..cbd29917e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ on:
       - releases/*
 
 
-# Note that when you see patterns like "ref: test-data/v2/basic" within this workflow, 
+# Note that when you see patterns like "ref: test-data/v2/basic" within this workflow,
 # these refer to "test-data" branches on this actions/checkout repo.
 # (For example, test-data/v2/basic -> https://github.com/actions/checkout/tree/test-data/v2/basic)
 
@@ -37,7 +37,7 @@ jobs:
     steps:
       # Clone this repo
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
 
       # Basic checkout
       - name: Checkout basic
@@ -257,7 +257,7 @@ jobs:
           path: basic
       - name: Verify basic
         run: __test__/verify-basic.sh --archive
-    
+
   test-git-container:
     runs-on: ubuntu-latest
     container: bitnami/git:latest
diff --git a/__test__/verify-basic.sh b/__test__/verify-basic.sh
index 5aaa309b8..d084617f0 100755
--- a/__test__/verify-basic.sh
+++ b/__test__/verify-basic.sh
@@ -18,6 +18,20 @@ else
     exit 1
   fi
 
+  # Verify that sparse-checkout is disabled.
+  SPARSE_CHECKOUT_ENABLED=$(git -C ./basic config --local --get-all core.sparseCheckout)
+  if [ "$SPARSE_CHECKOUT_ENABLED" != "" ]; then
+    echo "Expected sparse-checkout to be disabled (discovered: $SPARSE_CHECKOUT_ENABLED)"
+    exit 1
+  fi
+
+  # Verify git configuration shows worktreeConfig is effectively disabled
+  WORKTREE_CONFIG_ENABLED=$(git -C ./basic config --local --get-all extensions.worktreeConfig)
+  if [[ "$WORKTREE_CONFIG_ENABLED" != "" ]]; then
+    echo "Expected extensions.worktreeConfig (boolean) to be disabled in git config.  This could be an artifact of sparse checkout functionality."
+    exit 1
+  fi
+
   # Verify auth token
   cd basic
   git fetch --no-tags --depth=1 origin +refs/heads/main:refs/remotes/origin/main
diff --git a/dist/index.js b/dist/index.js
index b21024745..5ff87e42a 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -582,6 +582,8 @@ class GitCommandManager {
     disableSparseCheckout() {
         return __awaiter(this, void 0, void 0, function* () {
             yield this.execGit(['sparse-checkout', 'disable']);
+            // Disabling 'sparse-checkout` leaves behind an undesirable side-effect in config (even in a pristine environment).
+            yield this.tryConfigUnset('extensions.worktreeConfig', false);
         });
     }
     sparseCheckout(sparseCheckout) {
diff --git a/src/git-command-manager.ts b/src/git-command-manager.ts
index fa50321f8..8e42a387f 100644
--- a/src/git-command-manager.ts
+++ b/src/git-command-manager.ts
@@ -178,6 +178,8 @@ class GitCommandManager {
 
   async disableSparseCheckout(): Promise<void> {
     await this.execGit(['sparse-checkout', 'disable'])
+    // Disabling 'sparse-checkout` leaves behind an undesirable side-effect in config (even in a pristine environment).
+    await this.tryConfigUnset('extensions.worktreeConfig', false)
   }
 
   async sparseCheckout(sparseCheckout: string[]): Promise<void> {