thodg/libgit2

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d5a416..196ad70 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,14 @@ v0.23 + 1
 
 ### Breaking API changes
 
+* The `git_merge_tree_flag_t` is now `git_merge_flag_t`.  Subsequently,
+  its members are no longer prefixed with `GIT_MERGE_TREE_FLAG` but are
+  now prefixed with `GIT_MERGE_FLAG`, and the `tree_flags` field of the
+  `git_merge_options` structure is now named `flags`.
+
+* The `git_merge_file_flags_t` enum is now `git_merge_file_flag_t` for
+  consistency with other enum type names.
+
 * `git_cert` descendent types now have a proper `parent` member
 
 * It is the responsibility of the refdb backend to decide what to do
diff --git a/include/git2/merge.h b/include/git2/merge.h
index b7da63e..de224ae 100644
--- a/include/git2/merge.h
+++ b/include/git2/merge.h
@@ -62,8 +62,8 @@ GIT_EXTERN(int) git_merge_file_init_input(
 	unsigned int version);
 
 /**
- * Flags for `git_merge_tree` options.  A combination of these flags can be
- * passed in via the `tree_flags` value in the `git_merge_options`.
+ * Flags for `git_merge` options.  A combination of these flags can be
+ * passed in via the `flags` value in the `git_merge_options`.
  */
 typedef enum {
 	/**
@@ -71,20 +71,20 @@ typedef enum {
 	 * side or the common ancestor and the "theirs" side.  This will enable
 	 * the ability to merge between a modified and renamed file.
 	 */
-	GIT_MERGE_TREE_FIND_RENAMES = (1 << 0),
+	GIT_MERGE_FIND_RENAMES = (1 << 0),
 
 	/**
-	 * If a conflict occurs, exit immediately instead of attempting to
-	 * continue resolving conflicts.  The merge operation will fail with
-	 * GIT_EMERGECONFLICT and no index will be returned.
+	 * Do not write the REUC extension on the generated index
 	 */
-	GIT_MERGE_TREE_FAIL_ON_CONFLICT = (1 << 1),
+	GIT_MERGE_SKIP_REUC = (1 << 2),
 
 	/**
-	 * Do not write the REUC extension on the generated index
+	 * If a conflict occurs, exit immediately instead of attempting to
+	 * continue resolving conflicts.  The merge operation will fail with
+	 * GIT_EMERGECONFLICT and no index will be returned.
 	 */
-	GIT_MERGE_TREE_SKIP_REUC = (1 << 2),
-} git_merge_tree_flag_t;
+	GIT_MERGE_FAIL_ON_CONFLICT = (1 << 1),
+} git_merge_flag_t;
 
 /**
  * Merge file favor options for `git_merge_options` instruct the file-level
@@ -152,7 +152,7 @@ typedef enum {
 
 	/** Take extra time to find minimal diff */
 	GIT_MERGE_FILE_DIFF_MINIMAL = (1 << 7),
-} git_merge_file_flags_t;
+} git_merge_file_flag_t;
 
 /**
  * Options for merging a file
@@ -181,8 +181,8 @@ typedef struct {
 	/** The file to favor in region conflicts. */
 	git_merge_file_favor_t favor;
 
-	/** see `git_merge_file_flags_t` above */
-	unsigned int flags;
+	/** see `git_merge_file_flag_t` above */
+	git_merge_file_flag_t flags;
 } git_merge_file_options;
 
 #define GIT_MERGE_FILE_OPTIONS_VERSION 1
@@ -232,11 +232,13 @@ typedef struct {
  */
 typedef struct {
 	unsigned int version;
-	git_merge_tree_flag_t tree_flags;
+
+	/** See `git_merge_flag_t` above */
+	git_merge_flag_t flags;
 
 	/**
 	 * Similarity to consider a file renamed (default 50).  If
-	 * `GIT_MERGE_TREE_FIND_RENAMES` is enabled, added files will be compared
+	 * `GIT_MERGE_FIND_RENAMES` is enabled, added files will be compared
 	 * with deleted files to determine their similarity.  Files that are
 	 * more similar than the rename threshold (percentage-wise) will be
 	 * treated as a rename.
@@ -258,8 +260,8 @@ typedef struct {
 	/** Flags for handling conflicting content. */
 	git_merge_file_favor_t file_favor;
 
-	/** see `git_merge_file_flags_t` above */
-	unsigned int file_flags;
+	/** see `git_merge_file_flag_t` above */
+	git_merge_file_flag_t file_flags;
 } git_merge_options;
 
 #define GIT_MERGE_OPTIONS_VERSION 1
diff --git a/src/merge.c b/src/merge.c
index bad5f95..d7b23e2 100644
--- a/src/merge.c
+++ b/src/merge.c
@@ -1296,7 +1296,7 @@ int git_merge_diff_list__find_renames(
 
 	assert(diff_list && opts);
 
-	if ((opts->tree_flags & GIT_MERGE_TREE_FIND_RENAMES) == 0)
+	if ((opts->flags & GIT_MERGE_FIND_RENAMES) == 0)
 		return 0;
 
 	similarity_ours = git__calloc(diff_list->conflicts.length,
@@ -1632,8 +1632,8 @@ static int merge_normalize_opts(
 		git_merge_options init = GIT_MERGE_OPTIONS_INIT;
 		memcpy(opts, &init, sizeof(init));
 
-		opts->tree_flags = GIT_MERGE_TREE_FIND_RENAMES;
-		opts->rename_threshold = GIT_MERGE_TREE_RENAME_THRESHOLD;
+		opts->flags = GIT_MERGE_FIND_RENAMES;
+		opts->rename_threshold = GIT_MERGE_DEFAULT_RENAME_THRESHOLD;
 	}
 
 	if (!opts->target_limit) {
@@ -1643,7 +1643,7 @@ static int merge_normalize_opts(
 			limit = git_config__get_int_force(cfg, "diff.renamelimit", 0);
 
 		opts->target_limit = (limit <= 0) ?
-			GIT_MERGE_TREE_TARGET_LIMIT : (unsigned int)limit;
+			GIT_MERGE_DEFAULT_TARGET_LIMIT : (unsigned int)limit;
 	}
 
 	/* assign the internal metric with whitespace flag as payload */
@@ -1864,7 +1864,7 @@ int git_merge__iterators(
 			goto done;
 
 		if (!resolved) {
-			if ((opts.tree_flags & GIT_MERGE_TREE_FAIL_ON_CONFLICT)) {
+			if ((opts.flags & GIT_MERGE_FAIL_ON_CONFLICT)) {
 				giterr_set(GITERR_MERGE, "merge conflicts exist");
 				error = GIT_EMERGECONFLICT;
 				goto done;
@@ -1875,7 +1875,7 @@ int git_merge__iterators(
 	}
 
 	error = index_from_diff_list(out, diff_list,
-		(opts.tree_flags & GIT_MERGE_TREE_SKIP_REUC));
+		(opts.flags & GIT_MERGE_SKIP_REUC));
 
 done:
 	if (!given_opts || !given_opts->metric)
diff --git a/src/merge.h b/src/merge.h
index 3caf617..bd839be 100644
--- a/src/merge.h
+++ b/src/merge.h
@@ -19,8 +19,8 @@
 #define GIT_MERGE_MODE_FILE		"MERGE_MODE"
 #define GIT_MERGE_FILE_MODE		0666
 
-#define GIT_MERGE_TREE_RENAME_THRESHOLD	50
-#define GIT_MERGE_TREE_TARGET_LIMIT		1000
+#define GIT_MERGE_DEFAULT_RENAME_THRESHOLD	50
+#define GIT_MERGE_DEFAULT_TARGET_LIMIT		1000
 
 /** Types of changes when files are merged from branch to branch. */
 typedef enum {
diff --git a/tests/cherrypick/workdir.c b/tests/cherrypick/workdir.c
index 787f1f4..2b45f5a 100644
--- a/tests/cherrypick/workdir.c
+++ b/tests/cherrypick/workdir.c
@@ -300,7 +300,7 @@ void test_cherrypick_workdir__rename(void)
 		{ 0100644, "28d9eb4208074ad1cc84e71ccc908b34573f05d2", 0, "file3.txt.renamed" },
 	};
 
-	opts.merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	opts.merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	opts.merge_opts.rename_threshold = 50;
 
 	git_oid_fromstr(&head_oid, "cfc4f0999a8367568e049af4f72e452d40828a15");
@@ -335,7 +335,7 @@ void test_cherrypick_workdir__both_renamed(void)
 		{ 0100644, "28d9eb4208074ad1cc84e71ccc908b34573f05d2", 2, "file3.txt.renamed_on_branch" },
 	};
 
-	opts.merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	opts.merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	opts.merge_opts.rename_threshold = 50;
 
 	git_oid_fromstr(&head_oid, "44cd2ed2052c9c68f9a439d208e9614dc2a55c70");
diff --git a/tests/merge/trees/commits.c b/tests/merge/trees/commits.c
index 2e3c457..dd1e383 100644
--- a/tests/merge/trees/commits.c
+++ b/tests/merge/trees/commits.c
@@ -134,7 +134,7 @@ void test_merge_trees_commits__fail_on_conflict(void)
 	git_index *index;
 	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
 
-	opts.tree_flags |= GIT_MERGE_TREE_FAIL_ON_CONFLICT;
+	opts.flags |= GIT_MERGE_FAIL_ON_CONFLICT;
 
 	cl_git_fail_with(GIT_EMERGECONFLICT, 
 		merge_trees_from_branches(&index, repo, "df_side1", "df_side2", &opts));
diff --git a/tests/merge/trees/treediff.c b/tests/merge/trees/treediff.c
index f21d99b..3634568 100644
--- a/tests/merge/trees/treediff.c
+++ b/tests/merge/trees/treediff.c
@@ -47,7 +47,7 @@ static void test_find_differences(
 	git_iterator_options iter_opts = GIT_ITERATOR_OPTIONS_INIT;
 
 	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
-	opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	opts.flags |= GIT_MERGE_FIND_RENAMES;
 	opts.target_limit = 1000;
 	opts.rename_threshold = 50;
 
diff --git a/tests/merge/workdir/renames.c b/tests/merge/workdir/renames.c
index 83006a7..fabcda2 100644
--- a/tests/merge/workdir/renames.c
+++ b/tests/merge/workdir/renames.c
@@ -63,7 +63,7 @@ void test_merge_workdir_renames__renames(void)
 		{ 0100644, "b69fe837e4cecfd4c9a40cdca7c138468687df07", 0, "7-both-renamed.txt~rename_conflict_theirs" },
 	};
 
-	merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	merge_opts.rename_threshold = 50;
 
 	cl_git_pass(merge_branches(repo, GIT_REFS_HEADS_DIR BRANCH_RENAME_OURS, GIT_REFS_HEADS_DIR BRANCH_RENAME_THEIRS, &merge_opts, NULL));
@@ -99,7 +99,7 @@ void test_merge_workdir_renames__ours(void)
 		{ 0100644, "b42712cfe99a1a500b2a51fe984e0b8a7702ba11", 0, "7-both-renamed.txt" },
 	};
 
-	merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	merge_opts.rename_threshold = 50;
 	checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE | GIT_CHECKOUT_USE_OURS;
 
@@ -147,7 +147,7 @@ void test_merge_workdir_renames__similar(void)
 		{ 0100644, "b69fe837e4cecfd4c9a40cdca7c138468687df07", 0, "7-both-renamed.txt~rename_conflict_theirs" },
 	};
 
-	merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	merge_opts.rename_threshold = 50;
 
 	cl_git_pass(merge_branches(repo, GIT_REFS_HEADS_DIR BRANCH_RENAME_OURS, GIT_REFS_HEADS_DIR BRANCH_RENAME_THEIRS, &merge_opts, NULL));
diff --git a/tests/revert/workdir.c b/tests/revert/workdir.c
index 9f83bd8..802819c 100644
--- a/tests/revert/workdir.c
+++ b/tests/revert/workdir.c
@@ -410,7 +410,7 @@ void test_revert_workdir__rename_1_of_2(void)
 		{ 0100644, "0f5bfcf58c558d865da6be0281d7795993646cee", 2, "file6.txt" },
 	};
 
-	opts.merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	opts.merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	opts.merge_opts.rename_threshold = 50;
 
 	git_oid_fromstr(&head_oid, "cef56612d71a6af8d8015691e4865f7fece905b5");
@@ -444,7 +444,7 @@ void test_revert_workdir__rename(void)
 		{ "file4.txt", "file5.txt", "" },
 	};
 
-	opts.merge_opts.tree_flags |= GIT_MERGE_TREE_FIND_RENAMES;
+	opts.merge_opts.flags |= GIT_MERGE_FIND_RENAMES;
 	opts.merge_opts.rename_threshold = 50;
 
 	git_oid_fromstr(&head_oid, "55568c8de5322ff9a95d72747a239cdb64a19965");