[PATCH v5 2/9] sparse-index: silently return when not using cone-mode patterns
From: Derrick Stolee via GitGitGadget <hidden>
Date: 2021-09-08 01:42:43
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Derrick Stolee <redacted> While the sparse-index is only enabled when core.sparseCheckoutCone is also enabled, it is possible for the user to modify the sparse-checkout file manually in a way that does not match cone-mode patterns. In this case, we should refuse to convert an index into a sparse index, since the sparse_checkout_patterns will not be initialized with recursive and parent path hashsets. Also silently return if there are no cache entries, which is a simple case: there are no paths to make sparse! Signed-off-by: Derrick Stolee <redacted> --- sparse-index.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/sparse-index.c b/sparse-index.c
index c6b4feec413..cd6e0d5f408 100644
--- a/sparse-index.c
+++ b/sparse-index.c@@ -130,7 +130,7 @@ static int index_has_unmerged_entries(struct index_state *istate) int convert_to_sparse(struct index_state *istate) { int test_env; - if (istate->split_index || istate->sparse_index || + if (istate->split_index || istate->sparse_index || !istate->cache_nr || !core_apply_sparse_checkout || !core_sparse_checkout_cone) return 0;
@@ -158,10 +158,16 @@ int convert_to_sparse(struct index_state *istate) return 0; } - if (!istate->sparse_checkout_patterns->use_cone_patterns) { - warning(_("attempting to use sparse-index without cone mode")); - return -1; - } + /* + * We need cone-mode patterns to use sparse-index. If a user edits + * their sparse-checkout file manually, then we can detect during + * parsing that they are not actually using cone-mode patterns and + * hence we need to abort this conversion _without error_. Warnings + * already exist in the pattern parsing to inform the user of their + * bad patterns. + */ + if (!istate->sparse_checkout_patterns->use_cone_patterns) + return 0; /* * NEEDSWORK: If we have unmerged entries, then stay full.
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