1 files changed, 140 insertions, 0 deletions
diff --git a/unpack-trees.h b/unpack-trees.h
new file mode 100644
index 0000000..5867e26
--- /dev/null
+++ b/unpack-trees.h
@@ -0,0 +1,140 @@
+#ifndef UNPACK_TREES_H
+#define UNPACK_TREES_H
+
+#include "convert.h"
+#include "read-cache-ll.h"
+#include "strvec.h"
+#include "string-list.h"
+#include "tree-walk.h"
+
+#define MAX_UNPACK_TREES 8
+
+struct cache_entry;
+struct unpack_trees_options;
+struct pattern_list;
+
+typedef int (*merge_fn_t)(const struct cache_entry * const *src,
+		struct unpack_trees_options *options);
+
+enum unpack_trees_error_types {
+	ERROR_WOULD_OVERWRITE = 0,
+	ERROR_NOT_UPTODATE_FILE,
+	ERROR_NOT_UPTODATE_DIR,
+	ERROR_CWD_IN_THE_WAY,
+	ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN,
+	ERROR_WOULD_LOSE_UNTRACKED_REMOVED,
+	ERROR_BIND_OVERLAP,
+	ERROR_WOULD_LOSE_SUBMODULE,
+
+	NB_UNPACK_TREES_ERROR_TYPES,
+
+	WARNING_SPARSE_NOT_UPTODATE_FILE,
+	WARNING_SPARSE_UNMERGED_FILE,
+	WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN,
+
+	NB_UNPACK_TREES_WARNING_TYPES,
+};
+
+/*
+ * Sets the list of user-friendly error messages to be used by the
+ * command "cmd" (either merge or checkout), and show_all_errors to 1.
+ */
+void setup_unpack_trees_porcelain(struct unpack_trees_options *opts,
+				  const char *cmd);
+
+/*
+ * Frees resources allocated by setup_unpack_trees_porcelain().
+ */
+void clear_unpack_trees_porcelain(struct unpack_trees_options *opts);
+
+enum unpack_trees_reset_type {
+	UNPACK_RESET_NONE = 0,    /* traditional "false" value; still valid */
+	UNPACK_RESET_INVALID = 1, /* "true" no longer valid; use below values */
+	UNPACK_RESET_PROTECT_UNTRACKED,
+	UNPACK_RESET_OVERWRITE_UNTRACKED
+};
+
+struct unpack_trees_options {
+	unsigned int merge,
+		     update,
+		     preserve_ignored,
+		     clone,
+		     index_only,
+		     trivial_merges_only,
+		     verbose_update,
+		     aggressive,
+		     skip_unmerged,
+		     initial_checkout,
+		     diff_index_cached,
+		     skip_sparse_checkout,
+		     quiet,
+		     exiting_early,
+		     dry_run,
+		     skip_cache_tree_update;
+	enum unpack_trees_reset_type reset;
+	const char *prefix;
+	const char *super_prefix;
+	struct pathspec *pathspec;
+	merge_fn_t fn;
+
+	int head_idx;
+
+	struct cache_entry *df_conflict_entry; /* output only */
+	void *unpack_data;
+
+	struct index_state *dst_index;
+	struct index_state *src_index;
+
+	struct checkout_metadata meta;
+
+	struct unpack_trees_options_internal {
+		unsigned int nontrivial_merge,
+			     show_all_errors,
+			     debug_unpack; /* used by read-tree debugging */
+
+		int merge_size; /* used by read-tree debugging */
+		int cache_bottom;
+		const char *msgs[NB_UNPACK_TREES_WARNING_TYPES];
+		struct strvec msgs_to_free;
+
+		/*
+		 * Store error messages in an array, each case
+		 * corresponding to a error message type
+		 */
+		struct string_list unpack_rejects[NB_UNPACK_TREES_WARNING_TYPES];
+
+		struct index_state result;
+
+		struct pattern_list *pl;
+		struct dir_struct *dir;
+	} internal;
+};
+
+int unpack_trees(unsigned n, struct tree_desc *t,
+		 struct unpack_trees_options *options);
+
+enum update_sparsity_result {
+	UPDATE_SPARSITY_SUCCESS = 0,
+	UPDATE_SPARSITY_WARNINGS = 1,
+	UPDATE_SPARSITY_INDEX_UPDATE_FAILURES = -1,
+	UPDATE_SPARSITY_WORKTREE_UPDATE_FAILURES = -2
+};
+
+enum update_sparsity_result update_sparsity(struct unpack_trees_options *options,
+					    struct pattern_list *pl);
+
+int verify_uptodate(const struct cache_entry *ce,
+		    struct unpack_trees_options *o);
+
+int threeway_merge(const struct cache_entry * const *stages,
+		   struct unpack_trees_options *o);
+int twoway_merge(const struct cache_entry * const *src,
+		 struct unpack_trees_options *o);
+int bind_merge(const struct cache_entry * const *src,
+	       struct unpack_trees_options *o);
+int oneway_merge(const struct cache_entry * const *src,
+		 struct unpack_trees_options *o);
+int stash_worktree_untracked_merge(const struct cache_entry * const *src,
+				   struct unpack_trees_options *o);
+
+#endif