Adding upstream version 1:2.47.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

sparse-index.h

@@ -0,0 +1,49 @@
+#ifndef SPARSE_INDEX_H__
+#define SPARSE_INDEX_H__
+
+/*
+ * If performing an operation where the index is supposed to expand to a
+ * full index, then disable the advice message by setting this global to
+ * zero.
+ */
+extern int give_advice_on_expansion;
+
+struct index_state;
+#define SPARSE_INDEX_MEMORY_ONLY (1 << 0)
+int is_sparse_index_allowed(struct index_state *istate, int flags);
+int convert_to_sparse(struct index_state *istate, int flags);
+void ensure_correct_sparsity(struct index_state *istate);
+void clear_skip_worktree_from_present_files(struct index_state *istate);
+
+/*
+ * Some places in the codebase expect to search for a specific path.
+ * This path might be outside of the sparse-checkout definition, in
+ * which case a sparse-index may not contain a path for that index.
+ *
+ * Given an index and a path, check to see if a leading directory for
+ * 'path' exists in the index as a sparse directory. In that case,
+ * expand that sparse directory to a full range of cache entries and
+ * populate the index accordingly.
+ */
+void expand_to_path(struct index_state *istate,
+		    const char *path, size_t pathlen, int icase);
+
+struct repository;
+int set_sparse_index_config(struct repository *repo, int enable);
+
+struct pattern_list;
+
+/**
+ * Scan the given index and compare its entries to the given pattern list.
+ * If the index is sparse and the pattern list uses cone mode patterns,
+ * then modify the index to contain the all of the file entries within that
+ * new pattern list. This expands sparse directories only as far as needed.
+ *
+ * If the pattern list is NULL or does not use cone mode patterns, then the
+ * index is expanded to a full index.
+ */
+void expand_index(struct index_state *istate, struct pattern_list *pl);
+
+void ensure_full_index(struct index_state *istate);
+
+#endif