gc: automatically write commit-graph files

diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 2208c266b50766a9300fdcac81be4b695012f1e6..5947de3d2438ea301e33f2fc3430ee703d1436b9 100755 (executable)
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -245,6 +245,20 @@ test_expect_success 'perform fast-forward merge in full repo' '
        test_cmp expect output
 '
 
+test_expect_success 'check that gc computes commit-graph' '
+       cd "$TRASH_DIRECTORY/full" &&
+       git commit --allow-empty -m "blank" &&
+       git commit-graph write --reachable &&
+       cp $objdir/info/commit-graph commit-graph-before-gc &&
+       git reset --hard HEAD~1 &&
+       git config gc.writeCommitGraph true &&
+       git gc &&
+       cp $objdir/info/commit-graph commit-graph-after-gc &&
+       ! test_cmp commit-graph-before-gc commit-graph-after-gc &&
+       git commit-graph write --reachable &&
+       test_cmp commit-graph-after-gc $objdir/info/commit-graph
+'
+
 # the verify tests below expect the commit-graph to contain
 # exactly the commits reachable from the commits/8 branch.
 # If the file changes the set of commits in the list, then the