Merge branch 'sb/diff-color-move'

"git diff" has been taught to optionally paint new lines that are
the same as deleted lines elsewhere differently from genuinely new
lines.

* sb/diff-color-move: (25 commits)
  diff: document the new --color-moved setting
  diff.c: add dimming to moved line detection
  diff.c: color moved lines differently, plain mode
  diff.c: color moved lines differently
  diff.c: buffer all output if asked to
  diff.c: emit_diff_symbol learns about DIFF_SYMBOL_SUMMARY
  diff.c: emit_diff_symbol learns about DIFF_SYMBOL_STAT_SEP
  diff.c: convert word diffing to use emit_diff_symbol
  diff.c: convert show_stats to use emit_diff_symbol
  diff.c: convert emit_binary_diff_body to use emit_diff_symbol
  submodule.c: migrate diff output to use emit_diff_symbol
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_REWRITE_DIFF
  diff.c: emit_diff_symbol learns about DIFF_SYMBOL_BINARY_FILES
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_HEADER
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_FILEPAIR_{PLUS, MINUS}
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_INCOMPLETE
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_WORDS[_PORCELAIN]
  diff.c: migrate emit_line_checked to use emit_diff_symbol
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_NO_LF_EOF
  diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_FRAGINFO
  ...

1 files changed, 33 insertions, 6 deletions

diff --git a/diff.h b/diff.h
index 2d442e296f..5755f465de 100644
--- a/diff.h
+++ b/diff.h
@@ -148,9 +148,9 @@ struct diff_options {
 	int abbrev;
 	int ita_invisible_in_index;
 /* white-space error highlighting */
-#define WSEH_NEW 1
-#define WSEH_CONTEXT 2
-#define WSEH_OLD 4
+#define WSEH_NEW (1<<12)
+#define WSEH_CONTEXT (1<<13)
+#define WSEH_OLD (1<<14)
 	unsigned ws_error_highlight;
 	const char *prefix;
 	int prefix_length;
@@ -186,8 +186,27 @@ struct diff_options {
 	void *output_prefix_data;
 
 	int diff_path_counter;
+
+	struct emitted_diff_symbols *emitted_symbols;
+	enum {
+		COLOR_MOVED_NO = 0,
+		COLOR_MOVED_PLAIN = 1,
+		COLOR_MOVED_ZEBRA = 2,
+		COLOR_MOVED_ZEBRA_DIM = 3,
+	} color_moved;
+	#define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
+	#define COLOR_MOVED_MIN_BLOCK_LENGTH 3
 };
 
+void diff_emit_submodule_del(struct diff_options *o, const char *line);
+void diff_emit_submodule_add(struct diff_options *o, const char *line);
+void diff_emit_submodule_untracked(struct diff_options *o, const char *path);
+void diff_emit_submodule_modified(struct diff_options *o, const char *path);
+void diff_emit_submodule_header(struct diff_options *o, const char *header);
+void diff_emit_submodule_error(struct diff_options *o, const char *err);
+void diff_emit_submodule_pipethrough(struct diff_options *o,
+				     const char *line, int len);
+
 enum color_diff {
 	DIFF_RESET = 0,
 	DIFF_CONTEXT = 1,
@@ -197,7 +216,15 @@ enum color_diff {
 	DIFF_FILE_NEW = 5,
 	DIFF_COMMIT = 6,
 	DIFF_WHITESPACE = 7,
-	DIFF_FUNCINFO = 8
+	DIFF_FUNCINFO = 8,
+	DIFF_FILE_OLD_MOVED = 9,
+	DIFF_FILE_OLD_MOVED_ALT = 10,
+	DIFF_FILE_OLD_MOVED_DIM = 11,
+	DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
+	DIFF_FILE_NEW_MOVED = 13,
+	DIFF_FILE_NEW_MOVED_ALT = 14,
+	DIFF_FILE_NEW_MOVED_DIM = 15,
+	DIFF_FILE_NEW_MOVED_ALT_DIM = 16
 };
 const char *diff_get_color(int diff_use_color, enum color_diff ix);
 #define diff_get_color_opt(o, ix) \
@@ -396,8 +423,8 @@ extern int parse_rename_score(const char **cp_p);
 
 extern long parse_algorithm_value(const char *value);
 
-extern int print_stat_summary(FILE *fp, int files,
-			      int insertions, int deletions);
+extern void print_stat_summary(FILE *fp, int files,
+			       int insertions, int deletions);
 extern void setup_diff_pager(struct diff_options *);
 
 #endif /* DIFF_H */